Archiving old code

In a branch I will probably never use :)

.gitignore

@@ -10,3 +10,5 @@
 **/Makefile
 **/*.cbp
 **/node-modules/
+**/CMakeLists.txt.user
+**/catch2/bin/

README.md

@@ -2,15 +2,16 @@
 
 This repository is a collection of useful code snippets and configurations.
 
-```
+```bash
-github.com/shaunrd0/klips/
+shaunrd0/klips/
 ├── ansible     # Ansible roles, playbooks, and examples
 ├── blockchain  # Blockchain related project templates and examples
 ├── cpp         # C++ programs, datastructures, and other examples
 ├── dotnet      # .NET projects and examples
+├── esp         # ESP32 projects and examples
 ├── figlet      # Figlet fonts I like :)
 ├── javascript  # Javascript projects and examples
-├── python      # Python scripts or tools I've made   
+├── python      # Python scripts and tools I've made
-├── README.md   
+├── scripts     # Bash scripts
-└── scripts     # Bash scripts
+└── README.md
 ```

ansible/README.md

@@ -1,4 +1,4 @@
-# Ansible 
+# ansible
 
 A few simple roles / plays I've put together in learning how to use Ansible can be found under their corresponding directories.
 

blockchain/eth/truffle-solidity/README.md

@@ -1,3 +1,4 @@
+# blockchain
 
 A template project for getting started working on the Ethereum blockchain.
 This project comes with basic packages for compiling and deploying Solidity contracts with Truffle.
@@ -72,7 +73,7 @@ I explain how to configure metamask on ropsten on [Knoats - Solidity](https://kn
 
 Give yourself test Ethereum with the [Ropsten ETH Faucet](https://faucet.ropsten.be)
 
-To deploy to ropsten test network, and verify using `truffle-verify-plugin` - 
+To deploy to ropsten test network, and verify using `truffle-verify-plugin` -
 
 ```asm
 npx truffle migrate --network ropsten

cpp/CMakeLists.txt

@@ -21,9 +21,11 @@ set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 add_compile_options("-Wall")
 
 add_subdirectory(algorithms)
+add_subdirectory(catch2)
 add_subdirectory(cmake-example)
 add_subdirectory(cryptography)
 add_subdirectory(datastructs)
 add_subdirectory(graphics)
 add_subdirectory(multithreading)
-add_subdirectory(patterns)
+add_subdirectory(patterns)
+add_subdirectory(qt)

cpp/README.md

@@ -1,4 +1,4 @@
-# Cpp
+# cpp
 
 ```bash
 shaunrd0/klips/cpp/
@@ -9,14 +9,15 @@ shaunrd0/klips/cpp/
 ├── graphics       # Examples of graphics projects written in C++
 ├── multithreading # Basic multithreading examples in C++
 ├── patterns       # Examples of various design patterns written in C++
+├── qt             # Qt project examples using C++
 └── README.md
 ```
 
-This directory contains a `CMakeLists.txt`, which can be selected to open as a 
+This directory contains a `CMakeLists.txt`, which can be selected to open as a
 project within your preferred IDE. From there, all nested examples can be built,
 debugged, and ran.
 
-Some of the more recent projects in this repository requires the latest CMake LTS. 
+Some of the more recent projects in this repository requires the latest CMake LTS.
 To install `cmake` LTS with `apt` we can follow [official instructions from kitware](https://apt.kitware.com/)
 Alternatively, we can install the LTS with python's `pip`.
 ```bash
@@ -33,7 +34,7 @@ cmake version 3.22.1
 
 Once cmake is installed, dependencies for all examples can be installed with the command below.
 ```bash
-sudo apt install libsdl2-dev freeglut3-dev 
+sudo apt install libsdl2-dev freeglut3-dev
 ```
 
 If we build from this directory, we build all C++ projects and examples
@@ -62,7 +63,7 @@ graph-test-object            sdl-test              visitor-test
 graph-test-simple            select-sort
 ```
 
-We can also build from subdirectories. 
+We can also build from subdirectories.
 To only build projects related to design patterns we build from the `patterns/` subdirectory, for example
 ```bash
 cd /path/to/klips/cpp/patterns
@@ -79,5 +80,5 @@ adapter-test           factory-test  prototype-test  state-test
 
 If cmake is not being used in a project, it can be built with `g++` manually using
 the commands outlined in `*/.vscode/tasks.json`, or by using VSCode to open the example
-and running the build task. 
+and running the build task.
 Check the header comments in the main source file for the example for instructions.

cpp/catch2/CMakeLists.txt

@@ -0,0 +1,31 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Practice project for testing with catch2 framework                  ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       Catch2
+    VERSION         1.0
+    DESCRIPTION     "Practice project for learning Catch2"
+    LANGUAGES       CXX
+)
+
+add_compile_options(-Wall)
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin)
+
+Include(FetchContent)
+FetchContent_Declare(
+    Catch2
+    GIT_REPOSITORY https://github.com/catchorg/Catch2.git
+    GIT_TAG        v3.0.1
+)
+FetchContent_MakeAvailable(Catch2)
+
+add_subdirectory(src)
+add_subdirectory(test)

cpp/catch2/include/klips.hpp

@@ -0,0 +1,10 @@
+
+#ifndef KLIPS_KLIPS_H
+#define KLIPS_KLIPS_H
+
+
+class klips { };
+
+unsigned int factorial(unsigned int);
+
+#endif  // KLIPS_KLIPS_H

cpp/catch2/include/type_name.hpp

@@ -0,0 +1,29 @@
+// Authored by 康桓瑋 on SO: https://stackoverflow.com/a/56766138
+#ifndef CATCH2_TYPE_NAME_HPP
+
+#include <string_view>
+
+template <typename T>
+constexpr auto type_name() {
+  std::string_view name, prefix, suffix;
+#ifdef __clang__
+  name = __PRETTY_FUNCTION__;
+  prefix = "auto type_name() [T = ";
+  suffix = "]";
+#elif defined(__GNUC__)
+  name = __PRETTY_FUNCTION__;
+  prefix = "constexpr auto type_name() [with T = ";
+  suffix = "]";
+#elif defined(_MSC_VER)
+  name = __FUNCSIG__;
+  prefix = "auto __cdecl type_name<";
+  suffix = ">(void)";
+#endif
+  name.remove_prefix(prefix.size());
+  name.remove_suffix(suffix.size());
+  return name;
+}
+
+#define CATCH2_TYPE_NAME_HPP
+
+#endif  // CATCH2_TYPE_NAME_HPP

cpp/catch2/src/CMakeLists.txt

@@ -0,0 +1,22 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Practice project for testing with catch2 framework                  ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       Catch2
+    VERSION         1.0
+    DESCRIPTION     "Practice project for learning Catch2"
+    LANGUAGES       CXX
+)
+
+add_compile_options(-Wall)
+add_definitions("-std=c++17")
+
+add_library(klips SHARED klips.cpp)
+target_include_directories(klips PRIVATE ${CMAKE_SOURCE_DIR}/include)

cpp/catch2/src/klips.cpp

@@ -0,0 +1,4 @@
+
+unsigned int factorial( unsigned int number ) {
+  return number <= 1 ? number : factorial(number-1)*number;
+}

cpp/catch2/test/CMakeLists.txt

@@ -0,0 +1,22 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Practice project for testing with catch2 framework                  ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       Catch2
+    VERSION         1.0
+    DESCRIPTION     "Practice project for learning Catch2"
+    LANGUAGES       CXX
+)
+
+add_compile_options(-Wall)
+
+add_executable(test_klips test_klips.cpp)
+target_link_libraries(test_klips PRIVATE Catch2::Catch2WithMain klips)
+target_include_directories(test_klips PRIVATE ${CMAKE_SOURCE_DIR}/include)

cpp/catch2/test/test_klips.cpp

@@ -0,0 +1,147 @@
+#define CATCH_CONFIG_MAIN
+
+#include <iostream>
+
+#include "../bin/catch.hpp"
+#include "klips.hpp"
+#include "type_name.hpp"
+
+#define TT() std::cout << "T = " << type_name<TestType>() << std::endl;
+#define TD(x)                                                                  \
+  std::cout << type_name<decltype(x)>() << " " << #x << " = " << x << std::endl;
+#define T(x) std::cout << "T = " << type_name<x>() << std::endl;
+
+TEST_CASE("factorials are computed", "[factorial]") {
+  REQUIRE(factorial(1) == 1);
+  REQUIRE(factorial(2) == 2);
+  REQUIRE(factorial(3) == 6);
+  REQUIRE(factorial(10) == 3628800);
+}
+
+TEST_CASE("Generators") {
+  auto i = GENERATE(1, 3, 5);
+  TD(i);
+}
+
+TEST_CASE("Generators 2") {
+  auto i = GENERATE(1, 2);
+  SECTION("one") {
+    auto j = GENERATE(-3, -2);
+    REQUIRE(j < i);
+    std::cout << "i = " << i << "; j = " << j << std::endl;
+  }
+  SECTION("two") {
+    auto k = GENERATE(4, 5, 6);
+    REQUIRE(i != k);
+    std::cout << "i = " << i << "; k = " << k << std::endl;
+  }
+}
+
+TEST_CASE("Complex mix of sections and generates") {
+  auto i = GENERATE(1, 2);
+  SECTION("A") {
+    std::cout << "i = " << i << "; A passed" << std::endl;
+    SUCCEED("A");
+  }
+  std::cout << "left A\n";
+  auto j = GENERATE(3, 4);
+  std::cout << "i = " << i << "; j = " << j << std::endl;
+  SECTION("B") {
+    std::cout << "i = " << i << "; j = " << j << "; B passed;" << std::endl;
+    SUCCEED("B");
+  }
+  auto k = GENERATE(5, 6);
+  std::cout << "i = " << i << "; k = " << k << std::endl;
+  SUCCEED();
+}
+
+TEST_CASE("Test generaators 3", "[test]") { GENERATE(values({1, 2})); }
+
+TEMPLATE_TEST_CASE("Testing template tests", "[test][template]", int8_t,
+                   int16_t, int32_t, int64_t) {
+  TT();
+}
+
+template <typename T> struct Foo {
+  size_t size() { return 0; }
+};
+
+template <typename T> struct Test {
+  T test() {
+    T x;
+    return x;
+  }
+};
+
+TEMPLATE_PRODUCT_TEST_CASE("A Template product test case",
+                           "[template][product]", (std::vector, Test),
+                           (int, float)) {
+  TT();
+}
+
+TEMPLATE_PRODUCT_TEST_CASE("Product with differing arities",
+                           "[template][product]", std::tuple,
+                           (int, (int, double), (int, double, float))) {
+  TT();
+}
+
+using types = std::tuple<int8_t, int16_t, int32_t, int64_t>;
+
+TEMPLATE_LIST_TEST_CASE("Testing template list tests", "[test][template][list]",
+                        types) {
+  TT();
+}
+
+TEMPLATE_TEST_CASE_SIG(
+    "TemplateTestSig: arrays can be created from NTTP arguments",
+    "[vector][template][nttp]", ((typename T, int V), T, V), (int, 5),
+    (float, 4), (std::string, 15), ((std::tuple<int, float>), 6)) {
+  T(T);
+  std::cout << "V = " << V;
+  std::array<T, V> v;
+  REQUIRE(v.size() > 1);
+}
+
+template <typename T, size_t S> struct Bar {
+  size_t size() { return S; }
+};
+
+TEMPLATE_PRODUCT_TEST_CASE_SIG(
+    "A Template product test case with array signature",
+    "[template][product][nttp]", ((typename T, size_t S), T, S),
+    (std::array, Bar), ((int, 9), (float, 42))) {
+  TT();
+  TestType x;
+  REQUIRE(x.size() > 0);
+}
+
+template <typename T> struct test_config_get {
+  template <bool must_find> void run() {
+    //    Config c{};
+    //    std::string key{"the_key"};
+    //    std::string value{"the_value"};
+    //    c.set(key, value);
+    if constexpr (must_find) {
+      std::cout << "Test 1 ran";
+    } else {
+      std::cout << "Test 2 ran";
+    }
+  }
+};
+template <> template <bool must_find> void test_config_get<std::string>::run() {
+  if constexpr (must_find) {
+    std::cout << "Test 1 ran for strings";
+  } else {
+    std::cout << "Test 2 ran for strings";
+  }
+}
+
+TEMPLATE_PRODUCT_TEST_CASE("Test", "[test]", test_config_get,
+                           (int, std::string)) {
+  TT();
+  TestType t;
+  test_config_get<int> s;
+  s.template run<true>();
+  //  TestType t;
+  //  t.run<true>();
+}

cpp/problems/CMakeLists.txt

@@ -0,0 +1,21 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: A root project for C++ practice problems and solutions              ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.16)
+
+project(
+    #[[NAME]]   Problems
+    VERSION     1.0
+    DESCRIPTION "Practice problems and solutions written in C++"
+    LANGUAGES   CXX
+)
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY, ${CMAKE_BINARY_DIR}/bin)
+add_compile_options("-Wall")
+
+add_subdirectory(graphs)

cpp/problems/README.md

@@ -0,0 +1,24 @@
+# Problems
+
+A collection of some example problems and solutions written in C++. Mostly these
+are based off questions I found on [hackerrank](https://www.hackerrank.com), 
+[leetcode](https://leetcode.com/), [codility](https://www.codility.com/), or 
+similar programming practice platforms.
+
+```
+klips/cpp/problems
+.
+├── graphs     # Graph implementations with related problems and solutions
+└── README.md 
+```
+
+We can build the examples with the following commands.
+
+```bash
+cd /path/to/klips/cpp/problems/
+mkdir build && cd build
+cmake .. && cmake --build .
+ls bin/
+
+problems-graphs
+```

cpp/problems/graphs/CMakeLists.txt

@@ -0,0 +1,21 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Collection of problems and solutions to graph problems in C++       ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.16)
+
+project(
+    #[[NAME]]   ProblemsGraphs
+    VERSION     1.0
+    DESCRIPTION "Problems and solutions using graphs in C++"
+    LANGUAGES   CXX
+)
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+add_compile_options("-Wall")
+
+add_executable(problems-graphs driver.cpp lib-graph.cpp lib-graph.hpp)

cpp/problems/graphs/driver.cpp

@@ -0,0 +1,32 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Driver program solving various C++ graph problems                   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include <iostream>
+
+#include "lib-graph.hpp"
+
+int main(const int argc, const char * argv[]) {
+  Simple::Graph g({ {1,2,3}, {2,3,4} });
+  g.Print();
+  std::cout << std::endl;
+
+  std::vector<int> graphA = {6,0,1,2,3,4,5};
+  std::vector<std::pair<int, int>> graphB = { {9, 2}, {2, 3}, {3, 1} };
+  std::vector<std::vector<int>> graphC = {{1}, {2, 3}, {3, 1, 0}};
+  g.ReadEdges(graphA);
+  g.Print();
+  std::cout << std::endl;
+  g.ReadEdges(graphB);
+  g.Print();
+  std::cout << std::endl;
+  g.ReadEdges(graphC);
+  g.Print();
+
+  return 0;
+}

cpp/problems/graphs/lib-graph.cpp

@@ -0,0 +1,12 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Graph implementations to solve various problems in C++              ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "lib-graph.hpp"
+
+

cpp/problems/graphs/lib-graph.hpp

@@ -0,0 +1,335 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Graph implementations to solve various problems in C++              ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include <iostream>
+#include <unordered_map>
+#include <map>
+#include <utility>
+#include <vector>
+#include <algorithm>
+#include <cstdint>
+
+#ifndef GRAPHS_LIB_GRAPH_HPP
+#define GRAPHS_LIB_GRAPH_HPP
+
+
+namespace Simple {
+  typedef int32_t Node;
+  typedef std::vector<Node> Nodes;
+  typedef std::vector<Nodes> Edges;
+
+  class Graph {
+  public:
+    Graph() = default;
+    explicit Graph(Edges e) : edges(std::move(e)) { }
+
+    void Print()
+    {
+      for (size_t node = 0; node < edges.size(); node++) {
+        for (const auto & to : edges[node]) {
+          std::cout << "(" << node << ")-----(" << to << ")" << std::endl;
+        }
+      }
+    }
+
+    // Where graph[i] represents the connection between node i and graph[i]
+    // {1, 1, 2, 2}
+    void ReadEdges(const std::vector<int> & graph)
+    {
+      edges.clear();
+      edges.assign(graph.size(), {});
+      for (int i = 0; i < graph.size(); i++) {
+        if (i == graph[i]) continue;
+        edges[graph[i]].push_back(i);
+        edges[i].push_back(graph[i]);
+      }
+    }
+
+    // Where each graph[i] represents a single edge between two nodes
+    // { {1, 2}, {2, 3}, {3, 1} }
+    void ReadEdges(const std::vector<std::pair<int, int>> & graph)
+    {
+      edges.clear();
+      for (const auto & edge : graph) {
+        while (edges.size() <= edge.first || edges.size() <= edge.second) {
+          edges.emplace_back();
+        }
+        edges[edge.first].push_back(edge.second);
+        edges[edge.second].push_back(edge.first);
+      }
+    }
+
+    // Where graph[node] holds all connected adjacent nodes
+    // {{1}, {2, 3}, {2, 1, 0}}
+    void ReadEdges(const std::vector<std::vector<int>> & graph)
+    {
+      edges.clear();
+      edges.assign(graph.size(), {});
+      for (size_t i = 0; i < graph.size(); i++) {
+        for (const auto & adj : graph[i]) {
+          if (adj == i) continue;
+          edges[i].push_back(adj);
+          edges[adj].push_back(int32_t(i));
+        }
+      }
+    }
+
+  private:
+    Edges edges;
+  };
+}
+
+
+namespace Object {
+  struct Node {
+    Node() : val(INT32_MIN), adj() { }
+    explicit Node(int32_t v) : val(v), adj() { }
+    Node(int32_t v, std::vector<int32_t> a) : val(v), adj(std::move(a)) { }
+
+    int32_t val;
+    std::vector<int32_t> adj;
+
+    // Define operator== for std::find; And comparisons between nodes
+    bool operator==(const Node & b) const { return this->val == b.val;}
+    bool operator!=(const Node & b) const { return this->val != b.val;}
+  };
+
+  typedef std::vector<Node> Edges;
+
+  class Graph {
+  public:
+    Graph() = default;
+    explicit Graph(Edges e) : edges(std::move(e)) { }
+
+    void Print()
+    {
+      for (int32_t node = 0; node < edges.size(); node++) {
+        for (const auto & to : GetNode(node)->adj) {
+          std::cout << "(" << node << ")-----(" << to << ")" << std::endl;
+        }
+      }
+    }
+
+    Node * GetNode(const int32_t & nodeVal)
+    {
+      auto foundNode = std::find(edges.begin(), edges.end(), Node(nodeVal));
+//                       [nodeVal](const Node & a)->bool { return a.val == nodeVal;});
+      if (foundNode == edges.end()) return nullptr; // Node does not exist
+      return &*foundNode;
+    }
+
+    Node * CreateNode(const int32_t & nodeVal)
+    {
+      auto newNode = GetNode(nodeVal);
+      if (newNode != nullptr) return newNode;
+      // Create node if not found
+      edges.emplace_back(nodeVal); // Calls Node(int32_t) ctor
+      return &edges.back(); // Get ptr to our new node; Don't copy it
+    }
+
+    // Where graph[i] represents the connection between node i and graph[i]
+    // {1, 1, 2, 2}
+    void ReadEdges(const std::vector<int> & graph)
+    {
+      edges.clear();
+      for (int i = 0; i < graph.size(); i++) {
+        if (i == graph[i]) continue;
+        // Check if nodes already exist; Create them if not found
+        auto nodeFrom = CreateNode(graph[i]);
+        auto nodeTo = CreateNode(i);
+        // Push node ptr to adjacent list
+        nodeFrom->adj.push_back(nodeTo->val);
+        nodeTo->adj.push_back(nodeFrom->val);
+      }
+    }
+
+    // Where each graph[i] represents a single edge between two nodes
+    // { {1, 2}, {2, 3}, {3, 1} }
+    void ReadEdges(const std::vector<std::pair<int, int>> & graph)
+    {
+      edges.clear();
+      for (const auto & edge : graph) {
+        auto nodeFrom = CreateNode(edge.first);
+        auto nodeTo = CreateNode(edge.second);
+        nodeFrom->adj.push_back(nodeTo->val);
+        nodeTo->adj.push_back(nodeFrom->val);
+      }
+    }
+
+    // Where graph[node] holds all connected adjacent nodes
+    // {{1}, {2, 3}, {2, 1, 0}}
+    void ReadEdges(const std::vector<std::vector<int>> & graph)
+    {
+      edges.clear();
+      edges.assign(graph.size(), {});
+      for (size_t i = 0; i < graph.size(); i++) {
+        for (const auto & adj : graph[i]) {
+          if (adj == i) continue;
+          auto nodeFrom = CreateNode(int32_t(i));
+          auto nodeTo = CreateNode(adj);
+          nodeFrom->adj.push_back(nodeTo->val);
+          nodeTo->adj.push_back(nodeFrom->val);
+        }
+      }
+    }
+
+  private:
+    Edges edges;
+  };
+}
+
+namespace Weighted {
+  using Weight = int32_t;
+  using Adjacent = std::multimap<Weight, int32_t>;
+  struct Node {
+    Node() : val(INT32_MIN), adj() { }
+    explicit Node(int32_t v) : val(v), adj() { }
+    Node(int32_t v, Adjacent a) : val(v), adj(std::move(a)) { }
+
+    int32_t val;
+    Adjacent adj;
+  };
+  using Edge = std::pair<int, int>;
+
+  class Graph {
+    Graph() = default;
+    explicit Graph(Node n) : root(std::move(n)) { }
+    void ReadGraph(std::vector<std::vector<int>> nodeList)
+    {
+      // Read a 2D vector of nodes into a
+    }
+  private:
+    Node root;
+  };
+}
+
+
+//namespace Object {
+//struct Edge {
+//    friend struct Node;
+//    friend class Graph;
+//    Edge() : from(INT32_MIN), to(INT32_MIN) { }
+//    Edge(const int32_t & f, const int32_t & t) : from(f), to(t) { }
+//
+//  private:
+//    int32_t from, to;
+//  };
+//  using Edges = std::vector<Edge>;
+//
+////  template <typename T, typename S>
+////  struct Subscriptor {
+////    T<int32_t, S> data;
+////  };
+//
+//  struct Node {
+//    using Adjacent = std::vector<Node *>;
+//    using NodeMap = std::unordered_map<int32_t, Node *>;
+//    friend class Graph; // Allow Graph to access protected / private members
+//    friend struct GraphData;
+//
+//    // Struct is public by default
+//    Node () : val(0), adj() { }
+//    explicit Node(int32_t v) : val(v), adj() { }
+//    Node(int32_t v, Adjacent a) : val(v), adj(std::move(a)) { }
+//    inline void SetAdjacent(Adjacent a) { adj = std::move(a);}
+//    inline void SetVal(int32_t v) { val = v;}
+//    NodeMap GetNodeMap() {
+//      NodeMap result;
+//      BuildNodeMap(&result);
+//      return result;
+//    }
+//    void BuildNodeMap(NodeMap & nodeMap, Node * startNode=nullptr) {
+//      auto list = startNode == nullptr ? adj : startNode->adj;
+//      for (const auto & node : list) {
+//        if (!nodeMap.count(node->val)) {
+//          nodeMap[node->val] = node;
+//          BuildNodeMap(nodeMap, startNode);
+//        }
+//      }
+//    }
+//
+//  protected:
+//    int32_t val;
+//    Adjacent adj;
+//    Edges edges;
+//  };
+//
+//  struct GraphData {
+//    GraphData() = default;
+//    explicit GraphData(const Node & n)
+//    {
+//      graphEdges n.edges;
+//      for (const auto & edge : n.edges) {
+//      }
+//    }
+//
+//    // Implement subscript operators for unordered_multimap
+//    struct GraphEdges {
+//      Edges * operator[](int32_t nodeVal) {
+//        auto found = graphEdges.find(nodeVal):
+//        if (found != graphEdges.end()) {
+//          return &*found->second;
+//        }
+//        else {
+//          return nullptr;
+//        }
+//      }
+//      std::unordered_multimap<int32_t, Edges *> graphEdges;
+//    };
+//
+//    // Implement subscript operators for unordered_map
+//    struct GraphNodes {
+//      Node * operator[](int32_t nodeVal) {
+//        auto found = graphNodes.find(nodeVal):
+//        if (found != graphNodes.end()) {
+//          return &*found->second;
+//        }
+//        else {
+//          return nullptr;
+//        }
+//      }
+//      std::unordered_map<int32_t, Node *> graphNodes;
+//    };
+//    // unordered_* provides O(1) access and search
+//    GraphEdges graphEdges;
+//    GraphNodes graphNodes;
+//  };
+//
+//  class Graph {
+//    // Class is private by default
+//    Node root;
+//    std::unordered_map<int32_t, Node *> graphNodes;
+//    std::multimap<int32_t, Edges> graphEdges;
+////    std::unordered_map<int32_t, Node *> graphNodes;
+////    GraphData data; // Struct containing all graph edges / nodes
+//
+//  public:
+//    Graph() = default;
+//    explicit Graph(Node r) : root(std::move(r)) { }
+//
+//    inline const Node & GetRoot() const { return root;}
+////    inline Node * GetNode(int32_t nodeVal) { return data.graphNodes[nodeVal];}
+////    inline const Node * GetConstNode(int32_t nodeVal)
+////    { return data.graphNodes[nodeVal];}
+//
+//    const Node * DFS(int32_t nodeVal, int32_t startNode=INT32_MIN)
+//    {
+//      // If startNode was not set, begin search from root node
+//      startNode = startNode == INT32_MIN ? root.val : startNode;
+//      if (startNode == nodeVal) {
+//        return graphNodes[nodeVal];
+//      }
+//      for (const auto & edge : root.edges) {
+//        return DFS(nodeVal, edge.to);
+//      }
+//    }
+//  };
+//}
+
+#endif // GRAPHS_LIB_GRAPH_HPP

cpp/qt/CMakeLists.txt

@@ -0,0 +1,24 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: A root project for practicing Qt 6 projects in C++                  ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]   Klips
+    VERSION     1.0
+    DESCRIPTION "A root project for several small Qt6 practice projects"
+    LANGUAGES   CXX
+)
+
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
+add_compile_options("-Wall")
+
+add_subdirectory(designer)
+add_subdirectory(designer-plugin)
+add_subdirectory(designer-plugin-collection)
+add_subdirectory(slots)

cpp/qt/README.md

@@ -0,0 +1,32 @@
+# Cpp
+
+```bash
+shaunrd0/klips/cpp/qt/
+├── designer                    # Using Qt Designer to create application GUI
+├── designer-plugin             # Adding custom widgets as Qt Designer plugins
+├── designer-plugin-collection  # Adding a collection of widget plugins to Qt Designer
+└── README.md
+```
+
+This directory contains a `CMakeLists.txt`, which can be selected to open as a 
+project within your preferred IDE. From there, all nested examples can be built,
+debugged, and ran.
+
+The plugin examples will need to be installed for Qt Designer integration to work.
+On Linux, Qt Designer looks under `/some/path/to/Qt/Tools/QtCreator/lib/Qt/plugins/designer/`.
+On windows or Mac, this path may differ. Unfortunately I don't have these machines to test for myself.
+
+```bash
+cd klips/cpp/qt/designer-plugin-collection
+mkdir build && cd build
+cmake .. && cmake --build . --target install
+```
+
+After installing the plugin collection example above, we can open Qt Creator and navigate to the Designer.
+We should see the custom collection is available within the Designer, and the contents of the widgets render correctly in the application view.
+
+
+![side-panel-view.png](side-panel-view.png)
+
+
+![plugin-render-view.png](plugin-render-view.png)

cpp/qt/designer-plugin-collection/CMakeLists.txt

@@ -0,0 +1,110 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Example of making a collection of widget plugins for Qt Designer    ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       DesignerPluginCollection
+    VERSION         1.0
+    DESCRIPTION     "Example of a widget plugin collection for Qt Designer"
+    LANGUAGES       CXX
+)
+
+include(GenerateExportHeader)
+
+add_compile_options(-Wall)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_SHARED_MODULE_PREFIX "")
+
+set(QT_DIR "$ENV{HOME}/Code/Clones/Qt/" CACHE PATH "Path to Qt6")
+# Qt Designer will look in different locations if WIN / Unix.
+# These paths are for using Qt Designer integrated within Qt Creator.
+# Standalone Qt Designer may use different paths.
+if (WIN32)
+    set(QT_PLUGIN_INSTALL_DIR
+        "${QT_DIR}/Tools/QtCreator/bin/plugins/designer"
+    )
+    # This path may be different on windows. I have not tested this.
+    set(QT_PLUGIN_LIBRARY_DIR
+        "${QT_DIR}/Tools/QtCreator/lib/Qt/lib"
+    )
+else()
+    set(QT_PLUGIN_INSTALL_DIR
+        "${QT_DIR}/Tools/QtCreator/lib/Qt/plugins/designer"
+    )
+    set(QT_PLUGIN_LIBRARY_DIR
+        "${QT_DIR}/Tools/QtCreator/lib/Qt/lib"
+    )
+endif()
+# This should be set to your Qt6 installation directory.
+set(QT_INSTALL_DIR "${QT_DIR}/6.3.1/gcc_64/" CACHE PATH "Path to Qt6 install")
+list(APPEND CMAKE_PREFIX_PATH "${QT_INSTALL_DIR}")
+
+find_package(Qt6 REQUIRED COMPONENTS UiPlugin Core Gui Widgets)
+
+# Creating a library with two plugins for the collection.
+qt_add_library(widget-plugin-library
+    textview.cpp textview.h
+    widgetplugin.cpp widgetplugin.h
+)
+target_sources(widget-plugin-library PRIVATE
+    textview.cpp textview.h
+    treeview.cpp treeview.h
+    widgetplugin.cpp widgetplugin.h
+)
+set_target_properties(widget-plugin-library PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+target_link_libraries(widget-plugin-library
+    PUBLIC Qt::UiPlugin Qt::Core Qt::Gui Qt::Widgets
+)
+
+install(TARGETS widget-plugin-library
+    RUNTIME DESTINATION "${QT_PLUGIN_LIBRARY_DIR}"
+    BUNDLE DESTINATION "${QT_PLUGIN_LIBRARY_DIR}"
+    LIBRARY DESTINATION "${QT_PLUGIN_LIBRARY_DIR}"
+)
+
+generate_export_header(widget-plugin-library)
+
+# Creating the collection
+
+qt_add_library(widget-plugin-collection
+    widgetplugincollection.cpp widgetplugincollection.h
+)
+target_link_libraries(widget-plugin-collection
+    Qt6::Widgets Qt6::UiPlugin widget-plugin-library
+)
+install(TARGETS widget-plugin-collection
+    RUNTIME DESTINATION "${QT_PLUGIN_INSTALL_DIR}"
+    BUNDLE DESTINATION "${QT_PLUGIN_INSTALL_DIR}"
+    LIBRARY DESTINATION "${QT_PLUGIN_INSTALL_DIR}"
+)
+
+# Application that will use the widget plugin
+
+set(APP_DIR ${CMAKE_CURRENT_SOURCE_DIR})
+configure_file("${CMAKE_CURRENT_SOURCE_DIR}/app-dir.h.in"
+    "${CMAKE_CURRENT_SOURCE_DIR}/app-dir.h"
+    @ONLY
+)
+
+qt_add_executable(widget-app
+    widgetapp.cpp widgetapp.h widgetapp.ui
+    main.cpp
+)
+target_link_libraries(widget-app
+    PRIVATE Qt::Widgets widget-plugin-library
+)

cpp/qt/designer-plugin-collection/app-dir.h

@@ -0,0 +1,6 @@
+#ifndef APPDIR_H_IN
+#define APPDIR_H_IN
+
+#define APP_DIR "/home/kapper/Code/klips/cpp/qt/designer-plugin-collection"
+
+#endif // APPDIR_H_IN

cpp/qt/designer-plugin-collection/app-dir.h.in

@@ -0,0 +1,6 @@
+#ifndef APPDIR_H_IN
+#define APPDIR_H_IN
+
+#define APP_DIR "@APP_DIR@"
+
+#endif // APPDIR_H_IN

cpp/qt/designer-plugin-collection/main.cpp

@@ -0,0 +1,18 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Main driver fprogram for practice using signals and slots in Qt     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widgetapp.h"
+#include <QApplication>
+
+int main(int argc, char *argv[]) {
+  QApplication app(argc, argv);
+  WidgetApp widgetApp;
+  widgetApp.show();
+  return app.exec();
+}

cpp/qt/designer-plugin-collection/textview.cpp

@@ -0,0 +1,10 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Text viewer for signals and slots examples                          ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "textview.h"

cpp/qt/designer-plugin-collection/textview.h

@@ -0,0 +1,44 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Text viewer for signals and slots examples                          ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_TEXTVIEW_H
+#define KLIPS_TEXTVIEW_H
+
+#include "widget-plugin-library_export.h"
+#include <QPlainTextEdit>
+
+class WIDGET_PLUGIN_LIBRARY_EXPORT TextView : public QPlainTextEdit {
+  Q_OBJECT
+
+public:
+  explicit TextView(QWidget *parent = nullptr) : QPlainTextEdit(parent) {
+    appendPlainText("This is an example of a custom QTextView widget.");
+  }
+
+  ~TextView() = default;
+
+  QString includeFile() const { return QStringLiteral("text-view.h"); };
+public:
+signals:
+  void sendTest();
+
+private:
+signals:
+  void sentTestPrivate();
+
+public slots:
+  void test() { appendPlainText("Test signal received by TextView."); }
+
+  void testArgs(const QString &message) { appendPlainText(message); }
+
+private slots:
+  void testPrivate() {}
+};
+
+#endif // KLIPS_TEXTVIEW_H

cpp/qt/designer-plugin-collection/treeview.cpp

@@ -0,0 +1,10 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Tree viewer                                                         ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "treeview.h"

cpp/qt/designer-plugin-collection/treeview.h

@@ -0,0 +1,36 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Tree viewer                                                         ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_TREEVIEW_H
+#define KLIPS_TREEVIEW_H
+
+#include "widget-plugin-library_export.h"
+#include <app-dir.h>
+
+#include <QFileSystemModel>
+#include <QSortFilterProxyModel>
+#include <QTreeView>
+
+class WIDGET_PLUGIN_LIBRARY_EXPORT TreeView : public QTreeView {
+  Q_OBJECT
+
+public:
+  explicit TreeView(QWidget *parent = nullptr) : QTreeView(parent) {
+    QFileSystemModel *model = new QFileSystemModel;
+    QSortFilterProxyModel *proxy = new QSortFilterProxyModel(this);
+    QModelIndex rootModelIndex = model->setRootPath(APP_DIR);
+    proxy->setSourceModel(model);
+    setModel(proxy);
+    setRootIndex(proxy->mapFromSource(rootModelIndex));
+  }
+
+  ~TreeView() = default;
+};
+
+#endif // KLIPS_TREEVIEW_H

cpp/qt/designer-plugin-collection/widgetapp.cpp

@@ -0,0 +1,15 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Application that uses widget from the collection                    ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widgetapp.h"
+
+WidgetApp::WidgetApp(QWidget *parent) : QMainWindow(parent) {
+  m_widgetApp = new Ui::MainWindow;
+  m_widgetApp->setupUi(this);
+}

cpp/qt/designer-plugin-collection/widgetapp.h

@@ -0,0 +1,37 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Application that uses a custom Qt Designer widget plugin            ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_WIDGETAPP_H
+#define KLIPS_WIDGETAPP_H
+
+#include <QDockWidget>
+#include <QMainWindow>
+#include <QPlainTextEdit>
+#include <QVBoxLayout>
+#include <QWidget>
+
+#include "ui_widgetapp.h"
+
+class WidgetApp : public QMainWindow {
+  Q_OBJECT
+
+public:
+  explicit WidgetApp(QWidget *parent = nullptr);
+  ~WidgetApp() = default;
+
+  Ui::MainWindow * m_widgetApp;
+public:
+signals:
+  void sendTest();
+
+public slots:
+  void test(){};
+};
+
+#endif // KLIPS_WIDGETAPP_H

cpp/qt/designer-plugin-collection/widgetapp.ui

@@ -0,0 +1,107 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <property name="enabled">
+    <bool>true</bool>
+   </property>
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <layout class="QHBoxLayout" name="horizontalLayout_9">
+    <item>
+     <widget class="TextView" name="text-view_4" native="true"/>
+    </item>
+   </layout>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>22</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>File</string>
+    </property>
+    <addaction name="actionOption1"/>
+    <addaction name="actionOption2"/>
+    <addaction name="separator"/>
+    <addaction name="actionCategory_2"/>
+   </widget>
+   <widget class="QMenu" name="menuEdit">
+    <property name="title">
+     <string>Edit</string>
+    </property>
+   </widget>
+   <widget class="QMenu" name="menuHelp">
+    <property name="title">
+     <string>Help</string>
+    </property>
+   </widget>
+   <addaction name="menuFile"/>
+   <addaction name="menuEdit"/>
+   <addaction name="menuHelp"/>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+  <widget class="QDockWidget" name="dockWidget_5">
+   <attribute name="dockWidgetArea">
+    <number>1</number>
+   </attribute>
+   <widget class="QWidget" name="dockWidgetContents_8">
+    <layout class="QHBoxLayout" name="horizontalLayout_10">
+     <item>
+      <widget class="TreeView" name="tree-view"/>
+     </item>
+    </layout>
+   </widget>
+  </widget>
+  <action name="actionOption1">
+   <property name="text">
+    <string>Option1</string>
+   </property>
+  </action>
+  <action name="actionOption2">
+   <property name="text">
+    <string>Option2</string>
+   </property>
+  </action>
+  <action name="actionCategory_2">
+   <property name="text">
+    <string>Section 2</string>
+   </property>
+  </action>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>TreeView</class>
+   <extends>QWidget</extends>
+   <header>treeview.h</header>
+  </customwidget>
+  <customwidget>
+   <class>TextView</class>
+   <extends>QWidget</extends>
+   <header>textview.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>

cpp/qt/designer-plugin-collection/widgetplugin.cpp

@@ -0,0 +1,52 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Example of a generic Qt Designer widget plugin                      ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widgetplugin.h"
+#include "textview.h"
+
+#include <QtPlugin>
+#include <utility>
+
+WidgetPlugin::WidgetPlugin(QString group, QString name,
+                           WidgetPlugin::Factory factory)
+    : m_group(std::move(group)), m_name(std::move(name)),
+      m_includeFile(name + ".h"), m_factory(std::move(factory)) {}
+
+WidgetPlugin::WidgetPlugin(QString group, QString name, QString include,
+                           WidgetPlugin::Factory factory)
+    : m_group(std::move(group)), m_name(std::move(name)),
+      m_includeFile(std::move(include)), m_factory(std::move(factory)) {}
+
+QString WidgetPlugin::toolTip() const { return {}; }
+
+QString WidgetPlugin::whatsThis() const { return {}; }
+
+QIcon WidgetPlugin::icon() const { return {}; }
+
+bool WidgetPlugin::isContainer() const { return false; }
+
+QString WidgetPlugin::group() const { return m_group; }
+
+QString WidgetPlugin::name() const { return m_name; }
+
+// TODO: The generated UI headers do not use this member appropriately.
+QString WidgetPlugin::includeFile() const { return m_includeFile; }
+
+QWidget *WidgetPlugin::createWidget(QWidget *parent) {
+  return m_factory(parent);
+}
+
+bool WidgetPlugin::isInitialized() const { return m_initialized; }
+
+void WidgetPlugin::initialize(QDesignerFormEditorInterface *) {
+  if (m_initialized)
+    return;
+
+  m_initialized = true;
+}

cpp/qt/designer-plugin-collection/widgetplugin.h

@@ -0,0 +1,52 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Example Qt Designer widget plugin                                   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_WIDGETPLUGIN_H
+#define KLIPS_WIDGETPLUGIN_H
+
+#include <QDesignerCustomWidgetInterface>
+
+class WidgetPlugin : public QObject, public QDesignerCustomWidgetInterface {
+  Q_OBJECT
+  Q_PLUGIN_METADATA(IID "com.Klips.WidgetPlugin")
+  Q_INTERFACES(QDesignerCustomWidgetInterface)
+
+  using Factory = std::function<QWidget *(QWidget *)>;
+
+public:
+  WidgetPlugin(QString group, QString name, Factory factory);
+  WidgetPlugin(QString group, QString name, QString include, Factory factory);
+
+  explicit WidgetPlugin(QObject *parent = nullptr) : QObject(parent) {}
+
+  ~WidgetPlugin() = default;
+
+public:
+  [[nodiscard]] QString group() const override;
+  [[nodiscard]] QString name() const override;
+  [[nodiscard]] QString includeFile() const override;
+  QWidget *createWidget(QWidget *parent) override;
+
+  [[nodiscard]] QString toolTip() const override;
+  [[nodiscard]] QString whatsThis() const override;
+  [[nodiscard]] QIcon icon() const override;
+  [[nodiscard]] bool isContainer() const override;
+  [[nodiscard]] bool isInitialized() const override;
+  void initialize(QDesignerFormEditorInterface *core) override;
+
+private:
+  bool m_initialized = false;
+
+  QString m_group;
+  QString m_name;
+  QString m_includeFile;
+  Factory m_factory;
+};
+
+#endif // KLIPS_WIDGETPLUGIN_H

cpp/qt/designer-plugin-collection/widgetplugincollection.cpp

@@ -0,0 +1,28 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Collection of widget plugins for Qt Designer                        ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widgetplugincollection.h"
+#include "textview.h"
+#include "treeview.h"
+#include "widgetplugin.h"
+
+WidgetPluginCollection::WidgetPluginCollection(QObject *parent)
+    : QObject(parent), m_collectionName("Klips Widget Plugin Collection") {
+  m_collection = {
+      new WidgetPlugin(m_collectionName, "Text View Widget", "text-view.h",
+                       [](QWidget *parent) { return new TextView(parent); }),
+      new WidgetPlugin(m_collectionName, "tree-view",
+                       [](QWidget *parent) { return new TreeView(parent); }),
+
+  };
+}
+QList<QDesignerCustomWidgetInterface *>
+WidgetPluginCollection::customWidgets() const {
+  return m_collection;
+}

cpp/qt/designer-plugin-collection/widgetplugincollection.h

@@ -0,0 +1,22 @@
+
+#ifndef DESIGNERPLUGINCOLLECTION_WIDGETPLUGINCOLLECTION_H
+#define DESIGNERPLUGINCOLLECTION_WIDGETPLUGINCOLLECTION_H
+
+#include <QDesignerCustomWidgetCollectionInterface>
+
+class WidgetPluginCollection : public QObject,
+                               public QDesignerCustomWidgetCollectionInterface {
+  Q_OBJECT
+  Q_PLUGIN_METADATA(IID "com.Klips.WidgetPluginCollection")
+  Q_INTERFACES(QDesignerCustomWidgetCollectionInterface)
+
+public:
+  explicit WidgetPluginCollection(QObject *parent = nullptr);
+  [[nodiscard]] QList<QDesignerCustomWidgetInterface *> customWidgets() const;
+
+private:
+  QList<QDesignerCustomWidgetInterface *> m_collection;
+  QString m_collectionName;
+};
+
+#endif // DESIGNERPLUGINCOLLECTION_WIDGETPLUGINCOLLECTION_H

cpp/qt/designer-plugin/CMakeLists.txt

@@ -0,0 +1,76 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Example of making widget plugins for Qt Designer                    ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       DesignerPlugin
+    VERSION         1.0
+    DESCRIPTION     "Example of a widget plugin for Qt Designer"
+    LANGUAGES       CXX
+)
+
+include(GenerateExportHeader)
+
+add_compile_options(-Wall)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+set(CMAKE_SHARED_MODULE_PREFIX "")
+
+set(QT_DIR "$ENV{HOME}/Code/Clones/Qt/" CACHE PATH "Path to Qt6")
+# Qt Designer will look in different locations if WIN / Unix.
+if (WIN32)
+    set(QT_PLUGIN_INSTALL_DIR
+        "${QT_DIR}/Tools/QtCreator/bin/plugins/designer"
+    )
+else()
+    set(QT_PLUGIN_INSTALL_DIR
+        "${QT_DIR}/Tools/QtCreator/lib/Qt/plugins/designer"
+    )
+endif()
+# This should be set to your Qt6 installation directory.
+set(QT_INSTALL_DIR "${QT_DIR}/6.3.1/gcc_64/" CACHE PATH "Path to Qt6 install")
+list(APPEND CMAKE_PREFIX_PATH "${QT_INSTALL_DIR}")
+
+find_package(Qt6 REQUIRED COMPONENTS UiPlugin Core Gui Widgets)
+
+# Creating the plugin
+
+qt_add_library(widget-plugin)
+target_sources(widget-plugin PRIVATE
+    text-view.cpp text-view.h
+    widget-plugin.cpp widget-plugin.h
+)
+set_target_properties(widget-plugin PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+target_link_libraries(widget-plugin PUBLIC
+    Qt::UiPlugin Qt::Core Qt::Gui Qt::Widgets
+)
+
+install(TARGETS widget-plugin
+    RUNTIME DESTINATION "${QT_PLUGIN_INSTALL_DIR}"
+    BUNDLE DESTINATION "${QT_PLUGIN_INSTALL_DIR}"
+    LIBRARY DESTINATION "${QT_PLUGIN_INSTALL_DIR}"
+)
+
+# Application that will use the widget plugin
+
+qt_add_executable(widget-app
+    widget-app.cpp widget-app.h widget-app.ui
+    main.cpp
+)
+target_link_libraries(widget-app PRIVATE
+    Qt::Widgets widget-plugin
+)

cpp/qt/designer-plugin/main.cpp

@@ -0,0 +1,18 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Main driver fprogram for practice using signals and slots in Qt     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widget-app.h"
+#include <QApplication>
+
+int main(int argc, char *argv[]) {
+  QApplication app(argc, argv);
+  WidgetApp widgetApp;
+  widgetApp.show();
+  return app.exec();
+}

cpp/qt/designer-plugin/text-view.cpp

@@ -0,0 +1,10 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Text viewer for signals and slots examples                          ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "text-view.h"

cpp/qt/designer-plugin/text-view.h

@@ -0,0 +1,40 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Text viewer for signals and slots examples                          ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_TEXTVIEW_H
+#define KLIPS_TEXTVIEW_H
+
+#include <QPlainTextEdit>
+
+class TextView : public QPlainTextEdit {
+  Q_OBJECT
+
+public:
+  explicit TextView(QWidget *parent = nullptr) : QPlainTextEdit(parent) { }
+
+  ~TextView() = default;
+
+public:
+signals:
+  void sendTest();
+
+private:
+signals:
+  void sentTestPrivate();
+
+public slots:
+  void test() { appendPlainText("Test signal received by TextView."); }
+
+  void testArgs(const QString &message) { appendPlainText(message); }
+
+private slots:
+  void testPrivate() {}
+};
+
+#endif // KLIPS_TEXTVIEW_H

cpp/qt/designer-plugin/widget-app.cpp

@@ -0,0 +1,16 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Application that uses a custom Qt Designer widget plugin            ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widget-app.h"
+#include "widget-plugin.h"
+
+WidgetApp::WidgetApp(QWidget *parent) : QMainWindow(parent) {
+  m_ui = new Ui::MainWindow;
+  m_ui->setupUi(this);
+}

cpp/qt/designer-plugin/widget-app.h

@@ -0,0 +1,38 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Application that uses a custom Qt Designer widget plugin            ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_WIDGETAPP_H
+#define KLIPS_WIDGETAPP_H
+
+#include <QDockWidget>
+#include <QMainWindow>
+#include <QPlainTextEdit>
+#include <QVBoxLayout>
+#include <QWidget>
+
+#include "ui_widget-app.h"
+
+class WidgetApp : public QMainWindow {
+  Q_OBJECT
+
+public:
+  WidgetApp(QWidget *parent = nullptr);
+  ~WidgetApp() = default;
+
+  Ui::MainWindow *m_ui;
+
+public:
+signals:
+  void sendTest();
+
+public slots:
+  void test(){};
+};
+
+#endif // KLIPS_WIDGETAPP_H

cpp/qt/designer-plugin/widget-app.ui

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>MainWindow</class>
+ <widget class="QMainWindow" name="MainWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget">
+   <layout class="QHBoxLayout" name="horizontalLayout"/>
+  </widget>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>22</height>
+    </rect>
+   </property>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

cpp/qt/designer-plugin/widget-plugin.cpp

@@ -0,0 +1,67 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Example Qt Designer widget plugin                                   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "widget-plugin.h"
+#include "text-view.h"
+
+#include <QtPlugin>
+
+QString WidgetPlugin::toolTip() const
+{
+    return {};
+}
+
+QString WidgetPlugin::whatsThis() const
+{
+    return {};
+}
+
+QIcon WidgetPlugin::icon() const
+{
+    return {};
+}
+
+bool WidgetPlugin::isContainer() const
+{
+    return false;
+}
+
+QString WidgetPlugin::group() const
+{
+    return m_group;
+}
+
+QString WidgetPlugin::name() const
+{
+  return QStringLiteral("KlipsWidgetPlugin");
+}
+
+QString WidgetPlugin::includeFile() const
+{
+  return QStringLiteral("widget-plugin.h");
+}
+
+QWidget *WidgetPlugin::createWidget(QWidget *parent)
+{
+  return new TextView(parent);
+}
+
+bool WidgetPlugin::isInitialized() const
+{
+    return m_initialized;
+}
+
+void WidgetPlugin::initialize(QDesignerFormEditorInterface *)
+{
+
+  if (m_initialized)
+    return;
+
+  m_initialized = true;
+}

cpp/qt/designer-plugin/widget-plugin.h

@@ -0,0 +1,45 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Example Qt Designer widget plugin                                   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_WIDGETPLUGIN_H
+#define KLIPS_WIDGETPLUGIN_H
+
+#include <QtUiPlugin/QDesignerCustomWidgetInterface>
+
+class WidgetPlugin : public QObject, public QDesignerCustomWidgetInterface {
+Q_OBJECT
+Q_PLUGIN_METADATA(IID "com.Klips.WidgetPlugin")
+Q_INTERFACES(QDesignerCustomWidgetInterface)
+
+public:
+  explicit WidgetPlugin(QObject *parent = nullptr) : QObject(parent) {}
+
+  ~WidgetPlugin() = default;
+public:
+  QString group() const override;
+  QString name() const override;
+  QString includeFile() const override;
+  QWidget *createWidget(QWidget *parent) override;
+
+  QString toolTip() const override;
+  QString whatsThis() const override;
+  QIcon icon() const override;
+  bool isContainer() const override;
+  bool isInitialized() const override;
+  void initialize(QDesignerFormEditorInterface *core) override;
+
+private:
+  bool m_initialized = false;
+
+  QString m_group;
+  QString m_name;
+  QString m_includeFile;
+};
+
+#endif // KLIPS_WIDGETPLUGIN_H

cpp/qt/designer/CMakeLists.txt

@@ -0,0 +1,52 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Practice project for using Qt Designer with custom C++ widgets      ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       Designer
+    VERSION         0.1
+    DESCRIPTION     "Practice using Qt designer for desktop applications"
+    LANGUAGES       CXX
+)
+
+add_compile_options(-Wall)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(QT_DIR "$ENV{HOME}/Code/Clones/Qt/6.3.1/gcc_64/" CACHE PATH "Path to Qt6")
+
+list(APPEND CMAKE_PREFIX_PATH "${QT_DIR}")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_add_executable(designer
+    designer.cpp designer.h designer.ui
+    debugconsole.h debugconsole.cpp debugconsole.ui
+    texteditor.h texteditor.cpp texteditor.ui
+    treeview.h treeview.cpp treeview.ui
+    main.cpp
+)
+
+set_target_properties(designer PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(designer PUBLIC Qt::Core Qt::Gui Qt::Widgets)
+
+install(TARGETS designer
+    RUNTIME DESTINATION "install/designer"
+    BUNDLE DESTINATION "install/designer"
+    LIBRARY DESTINATION "install/designer"
+)

cpp/qt/designer/debugconsole.cpp

@@ -0,0 +1,18 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Debug console widget made in Qt Designer with C++                   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "debugconsole.h"
+#include "ui_debugconsole.h"
+
+DebugConsole::DebugConsole(QWidget *parent)
+    : QDockWidget(parent), ui(new Ui::DebugConsole) {
+  ui->setupUi(this);
+}
+
+DebugConsole::~DebugConsole() { delete ui; }

cpp/qt/designer/debugconsole.h

@@ -0,0 +1,29 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Debug console widget made in Qt Designer with C++                   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef DEBUGCONSOLE_H
+#define DEBUGCONSOLE_H
+
+#include "ui_debugconsole.h"
+#include <QDockWidget>
+
+class DebugConsole : public QDockWidget {
+  Q_OBJECT
+
+public:
+  explicit DebugConsole(QWidget *parent = nullptr);
+  ~DebugConsole();
+
+  inline QPlainTextEdit *getConsole() { return ui->plainTextEdit; }
+
+private:
+  Ui::DebugConsole *ui;
+};
+
+#endif // DEBUGCONSOLE_H

cpp/qt/designer/debugconsole.ui

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DebugConsole</class>
+ <widget class="QDockWidget" name="DebugConsole">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>DockWidget</string>
+  </property>
+  <widget class="QWidget" name="dockWidgetContents">
+   <layout class="QHBoxLayout" name="horizontalLayout">
+    <item>
+     <widget class="QPlainTextEdit" name="plainTextEdit"/>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

cpp/qt/designer/designer.cpp

@@ -0,0 +1,30 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: MainWindow for Qt Designer desktop application                      ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include <QtWidgets>
+
+#include "debugconsole.h"
+#include "designer.h"
+#include "texteditor.h"
+#include "treeview.h"
+
+Designer::Designer(QWidget *parent)
+    : QMainWindow(parent), designer_(new Ui::Designer) {
+  designer_->setupUi(this);
+  setCentralWidget(new TextEditor);
+  auto debugConsole = new DebugConsole;
+  debugConsole->getConsole()->appendPlainText("Test 1");
+  debugConsole->getConsole()->appendPlainText("Test 2");
+
+  auto treeView = new TreeView;
+
+  addDockWidget(Qt::DockWidgetArea::BottomDockWidgetArea, debugConsole);
+  addDockWidget(Qt::DockWidgetArea::BottomDockWidgetArea, treeView);
+  sendTest();
+}

cpp/qt/designer/designer.h

@@ -0,0 +1,39 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: MainWindow for Qt Designer desktop application                      ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_SLOTSAPP_H
+#define KLIPS_SLOTSAPP_H
+
+#include <QDockWidget>
+#include <QMainWindow>
+#include <QPlainTextEdit>
+#include <QVBoxLayout>
+#include <QWidget>
+
+#include "ui_designer.h"
+
+class Designer : public QMainWindow {
+  Q_OBJECT
+
+public:
+  Designer(QWidget *parent = nullptr);
+  ~Designer() = default;
+
+public:
+signals:
+  void sendTest();
+
+public slots:
+  void test(){};
+
+private:
+  Ui::Designer *designer_;
+};
+
+#endif // KLIPS_SLOTSAPP_H

cpp/qt/designer/designer.ui

@@ -0,0 +1,37 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>Designer</class>
+ <widget class="QMainWindow" name="Designer">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>800</width>
+    <height>600</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>MainWindow</string>
+  </property>
+  <widget class="QWidget" name="centralwidget"/>
+  <widget class="QMenuBar" name="menubar">
+   <property name="geometry">
+    <rect>
+     <x>0</x>
+     <y>0</y>
+     <width>800</width>
+     <height>22</height>
+    </rect>
+   </property>
+   <widget class="QMenu" name="menuFile">
+    <property name="title">
+     <string>File</string>
+    </property>
+   </widget>
+   <addaction name="menuFile"/>
+  </widget>
+  <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

cpp/qt/designer/main.cpp

@@ -0,0 +1,19 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Main driver program for Qt Designer desktop application..           ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "designer.h"
+#include <QApplication>
+
+int main(int argc, char * argv[]) {
+  QApplication app(argc, argv);
+  Designer qtk;
+  qtk.show();
+  // Show widget.
+  return app.exec();
+}

cpp/qt/designer/texteditor.cpp

@@ -0,0 +1,23 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Dockable text editor widget made in Qt Designer with C++            ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "texteditor.h"
+#include "ui_texteditor.h"
+
+TextEditor::TextEditor(QWidget *parent) :
+  QDockWidget(parent),
+  ui(new Ui::TextEditor)
+{
+  ui->setupUi(this);
+}
+
+TextEditor::~TextEditor()
+{
+  delete ui;
+}

cpp/qt/designer/texteditor.h

@@ -0,0 +1,31 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Dockable text editor widget made in Qt Designer with C++            ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef TEXTEDITOR_H
+#define TEXTEDITOR_H
+
+#include <QDockWidget>
+
+namespace Ui {
+  class TextEditor;
+}
+
+class TextEditor : public QDockWidget
+{
+  Q_OBJECT
+
+public:
+  explicit TextEditor(QWidget *parent = nullptr);
+  ~TextEditor();
+
+private:
+  Ui::TextEditor *ui;
+};
+
+#endif // TEXTEDITOR_H

cpp/qt/designer/texteditor.ui

@@ -0,0 +1,17 @@
+<ui version="4.0">
+ <class>TextEditor</class>
+ <widget class="QDockWidget" name="TextEditor">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>DockWidget</string>
+  </property>
+  <widget class="QWidget" name="dockWidgetContents"/>
+ </widget>
+</ui>

cpp/qt/designer/treeview.cpp

@@ -0,0 +1,23 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Dockable tree view widget made in Qt Designer with C++              ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "treeview.h"
+#include "ui_treeview.h"
+
+TreeView::TreeView(QWidget *parent) :
+  QDockWidget(parent),
+  ui(new Ui::TreeView)
+{
+  ui->setupUi(this);
+}
+
+TreeView::~TreeView()
+{
+  delete ui;
+}

cpp/qt/designer/treeview.h

@@ -0,0 +1,31 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Dockable tree view widget made in Qt Designer with C++              ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef TREEVIEW_H
+#define TREEVIEW_H
+
+#include <QDockWidget>
+
+namespace Ui {
+  class TreeView;
+}
+
+class TreeView : public QDockWidget
+{
+  Q_OBJECT
+
+public:
+  explicit TreeView(QWidget *parent = nullptr);
+  ~TreeView();
+
+private:
+  Ui::TreeView *ui;
+};
+
+#endif // TREEVIEW_H

cpp/qt/designer/treeview.ui

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>TreeView</class>
+ <widget class="QDockWidget" name="TreeView">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>400</width>
+    <height>300</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>DockWidget</string>
+  </property>
+  <widget class="QWidget" name="dockWidgetContents">
+   <layout class="QVBoxLayout" name="verticalLayout">
+    <item>
+     <widget class="QTreeView" name="treeView"/>
+    </item>
+   </layout>
+  </widget>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>

cpp/qt/slots/CMakeLists.txt

@@ -0,0 +1,50 @@
+################################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Practice project for using signals and slots in Qt                  ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+
+cmake_minimum_required(VERSION 3.15)
+
+project(
+    #[[NAME]]       Slots
+    VERSION         1.0
+    DESCRIPTION     "Practice using signals and slots in Qt 6"
+    LANGUAGES       CXX
+)
+
+add_compile_options(-Wall)
+set(CMAKE_INCLUDE_CURRENT_DIR ON)
+set(CMAKE_AUTOUIC ON)
+set(CMAKE_AUTOMOC ON)
+set(CMAKE_AUTORCC ON)
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
+set(QT_DIR "$ENV{HOME}/Code/Clones/Qt/6.3.1/gcc_64/" CACHE PATH "Path to Qt6")
+
+list(APPEND CMAKE_PREFIX_PATH "${QT_DIR}")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets)
+
+qt_add_executable(slots
+    text-view.cpp text-view.h
+    slots-app.cpp slots-app.h
+    main.cpp
+)
+
+set_target_properties(slots PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(slots PUBLIC Qt::Core Qt::Gui Qt::Widgets)
+
+install(TARGETS slots
+    RUNTIME DESTINATION "install/slots"
+    BUNDLE DESTINATION "install/slots"
+    LIBRARY DESTINATION "install/slots"
+)

cpp/qt/slots/main.cpp

@@ -0,0 +1,18 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Main driver fprogram for practice using signals and slots in Qt     ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "slots-app.h"
+#include <QApplication>
+
+int main(int argc, char *argv[]) {
+  QApplication app(argc, argv);
+  SlotsApp slotsApp;
+  slotsApp.show();
+  return app.exec();
+}

cpp/qt/slots/slots-app.cpp

@@ -0,0 +1,42 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: MainWindow application for practice using signals and slots in Qt   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "slots-app.h"
+#include "text-view.h"
+
+SlotsApp::SlotsApp(QWidget *parent) : QMainWindow(parent) {
+
+  auto textBox = new QPlainTextEdit;
+  auto textView = new TextView;
+  auto frame = new QFrame;
+
+  auto dock = new QDockWidget(this);
+  auto dockWidget = new QWidget;
+  auto dockWidgetLayout = new QVBoxLayout;
+  dockWidgetLayout->addWidget(frame);
+  dockWidgetLayout->addWidget(textBox);
+  dockWidget->setLayout(dockWidgetLayout);
+  dock->setWidget(dockWidget);
+
+  auto dock2 = new QDockWidget(this);
+  auto dockWidget2 = new QWidget;
+  auto dockWidgetLayout2 = new QVBoxLayout;
+  dockWidgetLayout2->addWidget(textView);
+  dockWidget2->setLayout(dockWidgetLayout2);
+  dock2->setWidget(dockWidget2);
+
+  textBox->setReadOnly(true);
+  textBox->appendPlainText("Test 1");
+  textBox->appendPlainText("Test 2");
+
+  addDockWidget(Qt::DockWidgetArea::BottomDockWidgetArea, dock);
+  addDockWidget(Qt::DockWidgetArea::BottomDockWidgetArea, dock2);
+  connect(this, &SlotsApp::sendTest, textView, &TextView::test);
+  sendTest();
+}

cpp/qt/slots/slots-app.h

@@ -0,0 +1,34 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: MainWindow application for practice using signals and slots in Qt   ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_SLOTSAPP_H
+#define KLIPS_SLOTSAPP_H
+
+#include <QDockWidget>
+#include <QMainWindow>
+#include <QPlainTextEdit>
+#include <QVBoxLayout>
+#include <QWidget>
+
+class SlotsApp : public QMainWindow {
+  Q_OBJECT
+
+public:
+  SlotsApp(QWidget *parent = nullptr);
+  ~SlotsApp() = default;
+
+public:
+signals:
+  void sendTest();
+
+public slots:
+  void test(){};
+};
+
+#endif // KLIPS_SLOTSAPP_H

cpp/qt/slots/text-view.cpp

@@ -0,0 +1,10 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Text viewer for signals and slots examples                          ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#include "text-view.h"

cpp/qt/slots/text-view.h

@@ -0,0 +1,40 @@
+/*##############################################################################
+## Author: Shaun Reed                                                         ##
+## Legal: All Content (c) 2022 Shaun Reed, all rights reserved                ##
+## About: Text viewer for signals and slots examples                          ##
+##                                                                            ##
+## Contact: shaunrd0@gmail.com  | URL: www.shaunreed.com | GitHub: shaunrd0   ##
+################################################################################
+*/
+
+#ifndef KLIPS_TEXTVIEW_H
+#define KLIPS_TEXTVIEW_H
+
+#include <QPlainTextEdit>
+
+class TextView : public QPlainTextEdit {
+  Q_OBJECT
+
+public:
+  TextView(QWidget *parent = nullptr) {}
+
+  ~TextView() = default;
+
+public:
+signals:
+  void sendTest()QWidget;
+
+private:
+signals:
+  void sentTestPrivate();
+
+public slots:
+  void test() { appendPlainText("Test signal received by TextView."); }
+
+  void testArgs(const QString &message) { appendPlainText(message); }
+
+private slots:
+  void testPrivate() {}
+};
+
+#endif // KLIPS_TEXTVIEW_H

dotnet/README.md

@@ -1,4 +1,4 @@
-# Dotnet
+# dotnet
 
 ```bash
 shaunrd0/klips/dotnet/

esp/cpp/01_led-button/01_led-button.ino

@@ -0,0 +1,38 @@
+// set pin numbers
+const int buttonPin = 4;  // the number of the pushbutton pin
+const int ledPin =  5;    // the number of the LED pin
+
+// variable for storing the pushbutton status
+int buttonState = 0;
+
+bool light_on = false;
+bool handled = false;
+
+void setup() {
+  Serial.begin(115200);
+  // initialize the pushbutton pin as an input
+  pinMode(buttonPin, INPUT);
+  // initialize the LED pin as an output
+  pinMode(ledPin, OUTPUT);
+}
+
+void loop() {
+  // read the state of the pushbutton value
+  buttonState = digitalRead(buttonPin);
+  // check if the pushbutton is pressed.
+  if (buttonState == HIGH) {
+    if (!handled) {
+      Serial.println("Handling button pressed.");
+      light_on = !light_on;
+      handled = true;
+      digitalWrite(ledPin, light_on ? HIGH : LOW);
+    }
+    // turn LED on
+  } else {
+    if (handled) {
+      Serial.println("Reset button handled state.");
+      handled = false;
+
+    }
+  }
+}

esp/cpp/01_led-button/README.md

@@ -0,0 +1,9 @@
+# 01_led-button
+
+This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
+
+The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
+
+![schematic](./schematic.png)
+
+Simple LED controlled by an on-board button.

esp/cpp/02_led-button-web/02_led-button-web.ino

@@ -0,0 +1,183 @@
+#include <WiFi.h>
+
+//
+// Web server project globals
+
+// Replace with your network credentials
+const char* ssid = "network-name";
+const char* password = "password";
+
+WiFiServer server(80);
+
+// Variable to store the HTTP request
+String header;
+
+// Current time
+unsigned long currentTime = millis();
+// Previous time
+unsigned long previousTime = 0;
+// Define timeout time in milliseconds (example: 2000ms = 2s)
+const long timeoutTime = 2000;
+
+//
+// Button / light project globals
+
+// set pin numbers
+const int buttonPin = 4;  // the number of the pushbutton pin
+const int ledPin =  5;    // the number of the LED pin
+
+// variable for storing the pushbutton status
+int buttonState = 0;
+
+bool light_on = false;
+bool handled = false;
+
+void setup() {
+  Serial.begin(115200);
+  // initialize the pushbutton pin as an input
+  pinMode(buttonPin, INPUT);
+  // initialize the LED pin as an output
+  pinMode(ledPin, OUTPUT);
+
+  // wait for the Serial Monitor to be open
+  while (!Serial) {
+    delay(100);
+  }
+
+  // Connect to Wi-Fi network with SSID and password
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  // Print local IP address and start web server
+  Serial.println("");
+  Serial.println("WiFi connected.");
+  Serial.println("Web Server IP address: ");
+  Serial.println(WiFi.localIP());
+  server.begin();
+}
+
+// Handles the on-board button press.
+void handleButtonPress() {
+  // read the state of the pushbutton value
+  buttonState = digitalRead(buttonPin);
+  // check if the pushbutton is pressed.
+  if (buttonState == HIGH) {
+    if (!handled) {
+      Serial.println("Handling button pressed.");
+      light_on = !light_on;
+      handled = true;
+      digitalWrite(ledPin, light_on ? HIGH : LOW);
+    }
+    // turn LED on
+  } else {
+    if (handled) {
+      Serial.println("Reset button handled state.");
+      handled = false;
+    }
+  }
+}
+
+void displayPinState(WiFiClient client, int gpio_pin, bool state) {
+  // Display current state, and ON/OFF buttons for GPIO <gpio_pin>
+  client.println(String("<p>GPIO ") + String(gpio_pin) + String(" - Current State ") + String(state ? "ON" : "OFF") + String("</p>"));
+  // If the output state is off, it displays the ON button
+  if (state) {
+    client.println(String("<p><a href=\"/") + String(gpio_pin) + String("/off\"><button class=\"button button2\">OFF</button></a></p>"));
+  } else {
+    client.println(String("<p><a href=\"/") + String(gpio_pin) + String("/on\"><button class=\"button\">ON</button></a></p>"));
+  }
+}
+
+void handleStateChange(WiFiClient client, int gpio_pin) {
+  if (header.indexOf(String("GET /") + String(gpio_pin) + String("/on")) >= 0) {
+    Serial.println(String("GPIO ") + String(gpio_pin) + String(" on"));
+    light_on = true;
+    digitalWrite(gpio_pin, HIGH);
+  } else if (header.indexOf(String("GET /") + String(gpio_pin) + String("/off")) >= 0) {
+    Serial.println(String("GPIO ") + String(gpio_pin) + String(" off"));
+    light_on = false;
+    digitalWrite(gpio_pin, LOW);
+  }
+}
+
+void loop() {
+  WiFiClient client = server.available();   // Listen for incoming clients
+
+  handleButtonPress();
+
+  if (client) {                             // If a new client connects,
+    currentTime = millis();
+    previousTime = currentTime;
+    Serial.println("New Client.");          // print a message out in the serial port
+    Serial.println("Web Server IP address: ");
+    Serial.println(WiFi.localIP());
+
+    String currentLine = "";                // make a String to hold incoming data from the client
+    while (client.connected() && currentTime - previousTime <= timeoutTime) {  // loop while the client's connected
+      // Also handle the button press in this loop to not miss events.
+      handleButtonPress();
+
+      currentTime = millis();
+      if (client.available()) {             // if there's bytes to read from the client,
+        char c = client.read();             // read a byte, then
+        Serial.write(c);                    // print it out the serial monitor
+        header += c;
+        if (c == '\n') {                    // if the byte is a newline character
+          // if the current line is blank, you got two newline characters in a row.
+          // that's the end of the client HTTP request, so send a response:
+          if (currentLine.length() == 0) {
+            // HTTP headers always start with a response code (e.g. HTTP/1.1 200 OK)
+            // and a content-type so the client knows what's coming, then a blank line:
+            client.println("HTTP/1.1 200 OK");
+            client.println("Content-type:text/html");
+            client.println("Connection: close");
+            client.println();
+
+            // turns the GPIOs on and off
+            // Display the HTML web page
+            client.println("<!DOCTYPE html><html>");
+            client.println("<head><meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">");
+            client.println("<link rel=\"icon\" href=\"data:,\">");
+            // CSS to style the on/off buttons
+            // Feel free to change the background-color and font-size attributes to fit your preferences
+            client.println("<style>html { font-family: Helvetica; display: inline-block; margin: 0px auto; text-align: center;}");
+            client.println(".button { background-color: #4CAF50; border: none; color: white; padding: 16px 40px;");
+            client.println("text-decoration: none; font-size: 30px; margin: 2px; cursor: pointer;}");
+            client.println(".button2 {background-color: #555555;}</style></head>");
+
+            //
+            // Web Page Heading
+            client.println("<body><h1>ESP32 Web Server</h1>");
+            //
+            // Web Page Body Contents
+
+            // Button Controls
+            displayPinState(client, ledPin, light_on);
+
+            //
+            // Close Web Page Body / Heading
+            client.println("</body></html>");
+            // The HTTP response ends with another blank line
+            client.println();
+            // Break out of the while loop
+            break;
+          } else { // if you got a newline, then clear currentLine
+            currentLine = "";
+          }
+        } else if (c != '\r') {  // if you got anything else but a carriage return character,
+          currentLine += c;      // add it to the end of the currentLine
+        }
+      }
+    }
+    // Clear the header variable
+    header = "";
+    // Close the connection
+    client.stop();
+    Serial.println("Client disconnected.");
+    Serial.println("");
+  }
+}

esp/cpp/02_led-button-web/README.md

@@ -0,0 +1,15 @@
+# 02_led-button-web
+
+This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
+
+The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
+
+![schematic](./schematic.png)
+
+This example uses the same schematic as [01_led-button](../01_led-button/).
+
+The only difference is that you can also control the button through a web browser from any device connected to your local network.
+
+This example was adapted from the example code in the [Arduino ESP32 API reference](https://docs.espressif.com/projects/arduino-esp32/en/latest/api/wifi.html#wi-fi-ap-example).
+
+![screenshot](./screenshot.png)

esp/cpp/03_temp-humidity-web/03_temp-humidity-web.ino

@@ -0,0 +1,161 @@
+// Import required libraries
+
+#include "WiFi.h"
+#include "ESPAsyncWebServer.h"
+#include <Adafruit_Sensor.h>
+#include <DHT.h>
+
+// Replace with your network credentials
+const char* ssid = "network-name";
+const char* password = "password";
+
+#define DHTPIN 4     // Digital pin connected to the DHT sensor
+
+// Uncomment the type of sensor in use:
+#define DHTTYPE    DHT11     // DHT 11
+//#define DHTTYPE    DHT22     // DHT 22 (AM2302)
+//#define DHTTYPE    DHT21     // DHT 21 (AM2301)
+
+DHT dht(DHTPIN, DHTTYPE);
+
+// Create AsyncWebServer object on port 80
+AsyncWebServer server(80);
+
+String readDHTTemperature() {
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  // Read temperature as Celsius (the default)
+  float t = dht.readTemperature();
+  // Read temperature as Fahrenheit (isFahrenheit = true)
+  //float t = dht.readTemperature(true);
+  // Check if any reads failed and exit early (to try again).
+  if (isnan(t)) {
+    Serial.println("Failed to read from DHT sensor!");
+    return "--";
+  }
+  else {
+    Serial.println(t);
+    return String(t);
+  }
+}
+
+String readDHTHumidity() {
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  float h = dht.readHumidity();
+  if (isnan(h)) {
+    Serial.println("Failed to read from DHT sensor!");
+    return "--";
+  }
+  else {
+    Serial.println(h);
+    return String(h);
+  }
+}
+
+const char index_html[] PROGMEM = R"rawliteral(
+<!DOCTYPE HTML><html>
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
+  <style>
+    html {
+     font-family: Arial;
+     display: inline-block;
+     margin: 0px auto;
+     text-align: center;
+    }
+    h2 { font-size: 3.0rem; }
+    p { font-size: 3.0rem; }
+    .units { font-size: 1.2rem; }
+    .dht-labels{
+      font-size: 1.5rem;
+      vertical-align:middle;
+      padding-bottom: 15px;
+    }
+  </style>
+</head>
+<body>
+  <h2>ESP32 DHT Server</h2>
+  <p>
+    <i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
+    <span class="dht-labels">Temperature</span>
+    <span id="temperature">%TEMPERATURE%</span>
+    <sup class="units">&deg;C</sup>
+  </p>
+  <p>
+    <i class="fas fa-tint" style="color:#00add6;"></i>
+    <span class="dht-labels">Humidity</span>
+    <span id="humidity">%HUMIDITY%</span>
+    <sup class="units">&percnt;</sup>
+  </p>
+</body>
+<script>
+setInterval(function ( ) {
+  var xhttp = new XMLHttpRequest();
+  xhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+      document.getElementById("temperature").innerHTML = this.responseText;
+    }
+  };
+  xhttp.open("GET", "/temperature", true);
+  xhttp.send();
+}, 10000 ) ;
+
+setInterval(function ( ) {
+  var xhttp = new XMLHttpRequest();
+  xhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+      document.getElementById("humidity").innerHTML = this.responseText;
+    }
+  };
+  xhttp.open("GET", "/humidity", true);
+  xhttp.send();
+}, 10000 ) ;
+</script>
+</html>)rawliteral";
+
+// Replaces placeholder with DHT values
+String processor(const String& var){
+  //Serial.println(var);
+  if(var == "TEMPERATURE"){
+    return readDHTTemperature();
+  }
+  else if(var == "HUMIDITY"){
+    return readDHTHumidity();
+  }
+  return String();
+}
+
+void setup(){
+  // Serial port for debugging purposes
+  Serial.begin(115200);
+
+  dht.begin();
+
+  // Connect to Wi-Fi
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(1000);
+    Serial.println("Connecting to WiFi..");
+  }
+
+  // Print ESP32 Local IP Address
+  Serial.println(WiFi.localIP());
+
+  // Route for root / web page
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
+    request->send_P(200, "text/html", index_html, processor);
+  });
+  server.on("/temperature", HTTP_GET, [](AsyncWebServerRequest *request){
+    request->send_P(200, "text/plain", readDHTTemperature().c_str());
+  });
+  server.on("/humidity", HTTP_GET, [](AsyncWebServerRequest *request){
+    request->send_P(200, "text/plain", readDHTHumidity().c_str());
+  });
+
+  // Start server
+  server.begin();
+}
+
+void loop(){
+
+}

esp/cpp/03_temp-humidity-web/README.md

@@ -0,0 +1,60 @@
+# 03_temp-humidity-web
+
+This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
+
+The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
+
+![schematic](./schematic.png)
+
+Temperature and humidity sensor served on a web page within the local network.
+
+![screenshot](./screenshot.png)
+
+## Dependencies
+
+You need to install a couple of libraries for this project:
+
+* The DHT and the Adafruit Unified Sensor Driver libraries to read from the DHT sensor.
+* ESPAsyncWebServer and Async TCP libraries to build the asynchronous web server.
+
+The default Arduino IDE installation will store libraries at `~/Arduino/ibraries` - if this directory doesn't exist, create it.
+
+### Installing DHT Sensor Library
+
+To read from the DHT sensor using Arduino IDE, you need to install the [DHT sensor library](https://github.com/adafruit/DHT-sensor-library).
+
+```bash
+wget -O DHT_sensor.zip https://github.com/adafruit/DHT-sensor-library/archive/master.zip
+unzip DHT_sensor.zip
+mv DHT-sensor-library-master/ ~/Arduino/libraries/DHT_sensor
+```
+
+## Install Adafruit Unified Sensor Driver Library
+
+You also need to install the [Adafruit Unified Sensor Driver library](https://github.com/adafruit/Adafruit_Sensor) to work with the DHT sensor.
+
+```bash
+wget -O Adafruit_sensor.zip https://github.com/adafruit/Adafruit_Sensor/archive/master.zip
+unzip Adafruit_sensor.zip
+mv Adafruit_Sensor-master/ ~/Arduino/libraries/Adafruit_sensor
+```
+
+## Installing ESPAsyncWebServer Library
+
+Follow the next steps to install the [ESPAsyncWebServer library](https://github.com/me-no-dev/ESPAsyncWebServer):
+
+```bash
+wget -O ESPAsyncWebServer.zip https://github.com/me-no-dev/ESPAsyncWebServer/archive/master.zip
+unzip ESPAsyncWebServer.zip
+mv ESPAsyncWebServer-master/ ~/Arduino/libraries/ESPAsyncWebServer
+```
+
+## Installing Async TCP Library
+
+The ESPAsyncWebServer library requires the [AsyncTCP library](https://github.com/me-no-dev/AsyncTCP) to work. Follow the next steps to install that library:
+
+```bash
+wget -O AsyncTCP.zip https://github.com/me-no-dev/AsyncTCP/archive/master.zip
+unzip AsyncTCP.zip
+mv AsyncTCP-master/ ~/Arduino/libraries/AsyncTCP
+```

esp/cpp/04_esp-idf-arduino/.gitignore

@@ -0,0 +1,4 @@
+build
+managed_components
+dependencies.lock
+sdkconfig.old

esp/cpp/04_esp-idf-arduino/CMakeLists.txt

@@ -0,0 +1,18 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.26)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+project(
+    #[[NAME]]   esp-idf-arduino
+    VERSION     0.1
+    DESCRIPTION "Example ESP-IDF cmake project"
+    LANGUAGES   CXX
+)
+
+# For writing pure cmake components, see the documentation
+# https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/build-system.html#writing-pure-cmake-components
+idf_build_set_property(COMPILE_OPTIONS "-Wno-error" APPEND)

esp/cpp/04_esp-idf-arduino/README.md

@@ -0,0 +1,81 @@
+# 04_esp-idf-arduino
+
+There is no schematic for this example, it simply prints some output to the serial monitor at 115200.
+This is more of a build system example for untethering yourself from the Arduino IDE.
+
+To build this example you can run the following commands.
+
+```bash
+# See Dependencies section below for instructions.
+source ~/path/to/esp-idf/export.sh
+
+mkdir build
+cd build
+cmake ..
+make -j $(nproc)
+
+# Flash the example to the ESP.
+make flash
+
+# Check the serial monitor for 'Hello world!' output.
+idf.py monitor -b 115200
+```
+
+To flash to your ESP or access the `idf.py menuconfig` menu from the ESP-IDF you can run the same commands with `make`.
+
+```bash
+make flash
+make menuconfig
+```
+
+If Ninja is preferred:
+
+```bash
+mkdir build
+cd build
+cmake .. -G Nina
+ninja
+```
+
+## Dependencies
+
+Install the [ESP-IDF](https://github.com/espressif/esp-idf?tab=readme-ov-file#setup-build-environment)
+
+```bash
+# https://docs.espressif.com/projects/esp-idf/en/v5.3.2/esp32/get-started/linux-macos-setup.html#for-linux-users
+sudo apt-get install -y git wget flex bison gperf python3 python3-pip python3-venv cmake ninja-build ccache libffi-dev libssl-dev dfu-util libusb-1.0-0
+
+git clone -b v5.3.2 --recursive https://github.com/espressif/esp-idf
+cd esp-idf
+./install.sh
+. ./export.sh
+```
+
+In CLion there is an official [Serial Monitor](https://plugins.jetbrains.com/plugin/8031-serial-port-monitor) plugin, or use ESP-IDF -
+
+```bash
+idf.py monitor -b 115200
+```
+
+## Starting Over
+
+To set up this project from scratch the following commands were used
+
+```bash
+# My example project directory
+cd ~/Code/klips/esp/cpp/04_esp-idf-arduino
+idf.py set-target esp32
+idf.py add-dependency "espressif/arduino-esp32^3.1.1"
+
+# Autostart Arduino for use of `loop()` and `setup()` functions
+# You can also use the esp-idf `app_main()` function if preferred
+# https://docs.espressif.com/projects/arduino-esp32/en/latest/esp-idf_component.html#configuration
+# You can alternatively do this in the GUI tool `idf.py menuconfig`
+echo "CONFIG_AUTOSTART_ARDUINO=y" >> sdkconfig
+sed -i -e 's/CONFIG_FREERTOS_HZ=100/CONFIG_FREERTOS_HZ=1000/' sdkconfig
+
+# Build the project
+idf.py build
+```
+
+To set this project up in CLion, see [JetBrains documentation](https://www.jetbrains.com/help/clion/esp-idf.html#env-vars).

esp/cpp/04_esp-idf-arduino/main/CMakeLists.txt

@@ -0,0 +1,4 @@
+idf_component_register(
+    SRCS "main.cpp"
+    INCLUDE_DIRS "."
+)

esp/cpp/04_esp-idf-arduino/main/idf_component.yml

@@ -0,0 +1,17 @@
+## IDF Component Manager Manifest File
+dependencies:
+  ## Required IDF version
+  idf:
+    version: '>=4.1.0'
+  # # Put list of dependencies here
+  # # For components maintained by Espressif:
+  # component: "~1.0.0"
+  # # For 3rd party components:
+  # username/component: ">=1.0.0,<2.0.0"
+  # username2/component2:
+  #   version: "~1.0.0"
+  #   # For transient dependencies `public` flag can be set.
+  #   # `public` flag doesn't have an effect dependencies of the `main` component.
+  #   # All dependencies of `main` are public by default.
+  #   public: true
+  espressif/arduino-esp32: ^3.1.1

esp/cpp/04_esp-idf-arduino/main/main.cpp

@@ -0,0 +1,10 @@
+#include "Arduino.h"
+
+void setup() {
+  Serial.begin(115200);
+}
+
+void loop() {
+  Serial.println("Hello world!");
+  delay(1000);
+}

esp/cpp/05_temp-humidity-web/.gitignore

@@ -0,0 +1,4 @@
+build
+managed_components
+dependencies.lock
+sdkconfig.old

esp/cpp/05_temp-humidity-web/CMakeLists.txt

@@ -0,0 +1,18 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.26)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+project(
+    #[[NAME]]   temp-humidity-web
+    VERSION     0.1
+    DESCRIPTION "Temperature and humidity from DHT sensor served on a web page"
+    LANGUAGES   CXX
+)
+
+# For writing pure cmake components, see the documentation
+# https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/build-system.html#writing-pure-cmake-components
+idf_build_set_property(COMPILE_OPTIONS "-Wno-error" APPEND)

esp/cpp/05_temp-humidity-web/README.md

@@ -0,0 +1,27 @@
+# 05_temp-humidity-web
+
+This is the same example in [03_temp-humidity-web](./../03_temp-humidity-web), ported to the cmake ESP-IDF build system.
+
+For instructions on setting up the ESP-IDF see [04_-esp-idf-arduino](./../04_esp-idf-arduino)
+
+This example is largely adapted from those in [ESP32-basic-starter-kit.pdf](./ESP32-basic-starter-kit.pdf).
+
+The APIs in the original examples paired with this PDF have changed, and I decided to do some different things with the code and/or circuits, but the original code can be [found here](https://www.dropbox.com/scl/fo/6znlij3eb23ih4jxcpv2w/AKvB1t9CCUgoVRVtGen8Yrw?rlkey=z84anl0hs940qf9fpl7l8q8q2&e=1&dl=0).
+
+![schematic](./schematic.png)
+
+Temperature and humidity sensor served on a web page within the local network.
+
+![screenshot](./screenshot.png)
+
+To build this example run the following commands.
+
+```bash
+source ~/path/to/esp-idf/export.sh
+
+mkdir build
+cd build
+cmake ..
+make -j $(nproc)
+make flash
+```

esp/cpp/05_temp-humidity-web/main/CMakeLists.txt

@@ -0,0 +1,4 @@
+idf_component_register(
+    SRCS "main.cpp"
+    INCLUDE_DIRS "."
+)

esp/cpp/05_temp-humidity-web/main/idf_component.yml

@@ -0,0 +1,19 @@
+## IDF Component Manager Manifest File
+dependencies:
+  ## Required IDF version
+  idf:
+    version: '>=4.1.0'
+  # # Put list of dependencies here
+  # # For components maintained by Espressif:
+  # component: "~1.0.0"
+  # # For 3rd party components:
+  # username/component: ">=1.0.0,<2.0.0"
+  # username2/component2:
+  #   version: "~1.0.0"
+  #   # For transient dependencies `public` flag can be set.
+  #   # `public` flag doesn't have an effect dependencies of the `main` component.
+  #   # All dependencies of `main` are public by default.
+  #   public: true
+  espressif/arduino-esp32: ^3.1.1
+  zorxx/dht: ^1.0.1
+  esp32async/espasyncwebserver: ^3.7.0~1

esp/cpp/05_temp-humidity-web/main/main.cpp

@@ -0,0 +1,189 @@
+#include "WiFi.h"
+#include "ESPAsyncWebServer.h"
+#include "main.h"
+
+// Replace with your network credentials
+const char *ssid = "wifi";
+const char *password = "password";
+
+#define DHTPIN GPIO_NUM_4  // Digital pin connected to the DHT sensor
+
+// Uncomment the type of sensor in use:
+#define DHTTYPE      DHT_TYPE_DHT11  // DHT 11
+//#define DHTTYPE    DHT_TYPE_DHT22  // DHT 22 (AM2302)
+//#define DHTTYPE    DHT_TYPE_DHT21  // DHT 21 (AM2301)
+
+float DHT::readTemperature(bool f)
+{
+  float humidity = 0;
+  float temperature = 0;
+  esp_err_t result = dht_read_float_data(type_, gpio_, &humidity,
+                                         &temperature);
+  if (result == ESP_OK) {
+    ESP_LOGI("[DHT::readTemperature]", "Humidity: %.1f%% Temperature: %.1f°C",
+             humidity,
+             temperature);
+  } else {
+    ESP_LOGE("[DHT::readTemperature]", "Failed to read sensor data: %s",
+             esp_err_to_name(result));
+  }
+  return f ? (temperature * 1.8f) + 32 : temperature;
+}
+
+float DHT::readHumidity()
+{
+  float humidity = 0;
+  float temperature = 0;
+  esp_err_t result = dht_read_float_data(type_, gpio_, &humidity,
+                                         &temperature);
+  if (result == ESP_OK) {
+    ESP_LOGI("[DHT::readTemperature]", "Humidity: %.1f%% Temperature: %.1f°C",
+             humidity,
+             temperature);
+  } else {
+    ESP_LOGE("[DHT::readTemperature]", "Failed to read sensor data: %s",
+             esp_err_to_name(result));
+  }
+  return humidity;
+}
+
+DHT dht(DHTPIN, DHTTYPE);
+
+// Create AsyncWebServer object on port 80
+AsyncWebServer server(80);
+
+String readDHTTemperature()
+{
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  float t = dht.readTemperature();
+  // Check if any reads failed and exit early (to try again).
+  if (isnan(t)) {
+    Serial.println("Failed to read from DHT sensor!");
+    return "--";
+  } else {
+    Serial.println(t);
+    return String(t);
+  }
+}
+
+String readDHTHumidity()
+{
+  // Sensor readings may also be up to 2 seconds 'old' (its a very slow sensor)
+  float h = dht.readHumidity();
+  if (isnan(h)) {
+    Serial.println("Failed to read from DHT sensor!");
+    return "--";
+  } else {
+    Serial.println(h);
+    return String(h);
+  }
+}
+
+const char index_html[] PROGMEM = R"rawliteral(
+<!DOCTYPE HTML><html>
+<head>
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.7.2/css/all.css" integrity="sha384-fnmOCqbTlWIlj8LyTjo7mOUStjsKC4pOpQbqyi7RrhN7udi9RwhKkMHpvLbHG9Sr" crossorigin="anonymous">
+  <style>
+    html {
+     font-family: Arial;
+     display: inline-block;
+     margin: 0px auto;
+     text-align: center;
+    }
+    h2 { font-size: 3.0rem; }
+    p { font-size: 3.0rem; }
+    .units { font-size: 1.2rem; }
+    .dht-labels{
+      font-size: 1.5rem;
+      vertical-align:middle;
+      padding-bottom: 15px;
+    }
+  </style>
+</head>
+<body>
+  <h2>ESP32 DHT Server</h2>
+  <p>
+    <i class="fas fa-thermometer-half" style="color:#059e8a;"></i>
+    <span class="dht-labels">Temperature</span>
+    <span id="temperature">%TEMPERATURE%</span>
+    <sup class="units">&deg;C</sup>
+  </p>
+  <p>
+    <i class="fas fa-tint" style="color:#00add6;"></i>
+    <span class="dht-labels">Humidity</span>
+    <span id="humidity">%HUMIDITY%</span>
+    <sup class="units">&percnt;</sup>
+  </p>
+</body>
+<script>
+setInterval(function ( ) {
+  var xhttp = new XMLHttpRequest();
+  xhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+      document.getElementById("temperature").innerHTML = this.responseText;
+    }
+  };
+  xhttp.open("GET", "/temperature", true);
+  xhttp.send();
+}, 10000 ) ;
+
+setInterval(function ( ) {
+  var xhttp = new XMLHttpRequest();
+  xhttp.onreadystatechange = function() {
+    if (this.readyState == 4 && this.status == 200) {
+      document.getElementById("humidity").innerHTML = this.responseText;
+    }
+  };
+  xhttp.open("GET", "/humidity", true);
+  xhttp.send();
+}, 10000 ) ;
+</script>
+</html>)rawliteral";
+
+// Replaces placeholder with DHT values
+String processor(const String &var)
+{
+  //Serial.println(var);
+  if (var == "TEMPERATURE") {
+    return readDHTTemperature();
+  } else if (var == "HUMIDITY") {
+    return readDHTHumidity();
+  }
+  return String();
+}
+
+void setup()
+{
+  // Serial port for debugging purposes
+  Serial.begin(115200);
+
+  // Connect to Wi-Fi
+  WiFi.begin(ssid, password);
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(1000);
+    Serial.println("Connecting to WiFi..");
+  }
+
+  // Print ESP32 Local IP Address
+  Serial.println(WiFi.localIP());
+
+  // Route for root / web page
+  server.on("/", HTTP_GET, [ ](AsyncWebServerRequest *request) {
+    request->send(200, "text/html", index_html, processor);
+  });
+  server.on("/temperature", HTTP_GET, [ ](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", readDHTTemperature().c_str());
+  });
+  server.on("/humidity", HTTP_GET, [ ](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", readDHTHumidity().c_str());
+  });
+
+  // Start server
+  server.begin();
+}
+
+void loop()
+{
+
+}

esp/cpp/05_temp-humidity-web/main/main.h

@@ -0,0 +1,33 @@
+#ifndef  MAIN_H
+#define  MAIN_H
+
+#include <cstdint>
+#include "dht.h"
+
+class DHT {
+public:
+  DHT(gpio_num_t gpio, dht_sensor_type_t type) :
+      gpio_(gpio), type_(type) { }
+
+  ~DHT() = default;
+
+  /**
+   * Read temperature from DHT sensor
+   *
+   * @param f True to return in Fahrenheit, False for Celsius.
+   */
+  float readTemperature(bool f = true);
+
+  /**
+   * Read humidity from DHT sensor.
+   */
+  float readHumidity();
+
+private:
+  gpio_num_t gpio_;
+  dht_sensor_type_t type_;
+
+};
+
+
+#endif // MAIN_H

esp/cpp/README.md

@@ -0,0 +1,20 @@
+# esp
+
+```bash
+shaunrd0/klips/esp/
+├── 01_led-button               # Simple LED circuit controlled by an on board button.
+├── 02_led-button-web           # LED controlled by a button or within a web browser.
+├── 03_temp-humidity-web        # Temperature and humidity sensor within a web browser.
+├── 04_esp-idf-arduino          # CMake example instead of Arduino IDE for ESP development.
+├── 05_temp-humidity-web        # Temperature and humidity sensor within a web browser.
+├── ESP32-basic-starter-kit.pdf # PDF for tutorials in ESP32 starter kit.
+├── ESP32-dev-module.png
+└── README.md
+```
+
+Examples 1-3 are built using the Arduino IDE.
+
+All examples after `04_esp-idf-arduino` are built with cmake and the [ESP-IDF](https://github.com/espressif/esp-idf).
+
+[Arduino ESP32 GitHub](https://github.com/espressif/arduino-esp32) \
+[Arduino ESP32 API reference](https://docs.espressif.com/projects/arduino-esp32/en/latest/libraries.html)

javascript/README.md

@@ -1,9 +1,9 @@
-# Javascript
+# javascript
 
 This directory contains Javascript projects and examples that I've made.
 
-```
+```bash
-github.com/shaunrd0/klips/javascript
+shaunrd0/klips/javascript
 ├── webgl      # Examples of using WebGL within JS
 └── README.md
 ```