[cpp] Add Qt Desginer widget plugin examples

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/CMakeLists.txt.user

@@ -0,0 +1,197 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE QtCreatorProject>
+<!-- Written by QtCreator 9.0.1, 2022-12-24T09:28:53. -->
+<qtcreator>
+ <data>
+  <variable>EnvironmentId</variable>
+  <value type="QByteArray">{ce8a8d3d-318d-4c62-a573-71d1755252ce}</value>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.ActiveTarget</variable>
+  <value type="qlonglong">0</value>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.EditorSettings</variable>
+  <valuemap type="QVariantMap">
+   <value type="bool" key="EditorConfiguration.AutoIndent">true</value>
+   <value type="bool" key="EditorConfiguration.AutoSpacesForTabs">false</value>
+   <value type="bool" key="EditorConfiguration.CamelCaseNavigation">true</value>
+   <valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.0">
+    <value type="QString" key="language">Cpp</value>
+    <valuemap type="QVariantMap" key="value">
+     <value type="QByteArray" key="CurrentPreferences">CppGlobal</value>
+    </valuemap>
+   </valuemap>
+   <valuemap type="QVariantMap" key="EditorConfiguration.CodeStyle.1">
+    <value type="QString" key="language">QmlJS</value>
+    <valuemap type="QVariantMap" key="value">
+     <value type="QByteArray" key="CurrentPreferences">QmlJSGlobal</value>
+    </valuemap>
+   </valuemap>
+   <value type="qlonglong" key="EditorConfiguration.CodeStyle.Count">2</value>
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+   <value type="int" key="EditorConfiguration.MarginColumn">80</value>
+   <value type="bool" key="EditorConfiguration.MouseHiding">true</value>
+   <value type="bool" key="EditorConfiguration.MouseNavigation">true</value>
+   <value type="int" key="EditorConfiguration.PaddingMode">1</value>
+   <value type="bool" key="EditorConfiguration.PreferSingleLineComments">false</value>
+   <value type="bool" key="EditorConfiguration.ScrollWheelZooming">true</value>
+   <value type="bool" key="EditorConfiguration.ShowMargin">false</value>
+   <value type="int" key="EditorConfiguration.SmartBackspaceBehavior">0</value>
+   <value type="bool" key="EditorConfiguration.SmartSelectionChanging">true</value>
+   <value type="bool" key="EditorConfiguration.SpacesForTabs">true</value>
+   <value type="int" key="EditorConfiguration.TabKeyBehavior">0</value>
+   <value type="int" key="EditorConfiguration.TabSize">8</value>
+   <value type="bool" key="EditorConfiguration.UseGlobal">true</value>
+   <value type="bool" key="EditorConfiguration.UseIndenter">false</value>
+   <value type="int" key="EditorConfiguration.Utf8BomBehavior">1</value>
+   <value type="bool" key="EditorConfiguration.addFinalNewLine">true</value>
+   <value type="bool" key="EditorConfiguration.cleanIndentation">true</value>
+   <value type="bool" key="EditorConfiguration.cleanWhitespace">true</value>
+   <value type="QString" key="EditorConfiguration.ignoreFileTypes">*.md, *.MD, Makefile</value>
+   <value type="bool" key="EditorConfiguration.inEntireDocument">false</value>
+   <value type="bool" key="EditorConfiguration.skipTrailingWhitespace">true</value>
+   <value type="bool" key="EditorConfiguration.tintMarginArea">true</value>
+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.PluginSettings</variable>
+  <valuemap type="QVariantMap">
+   <valuemap type="QVariantMap" key="AutoTest.ActiveFrameworks">
+    <value type="bool" key="AutoTest.Framework.Boost">true</value>
+    <value type="bool" key="AutoTest.Framework.CTest">false</value>
+    <value type="bool" key="AutoTest.Framework.Catch">true</value>
+    <value type="bool" key="AutoTest.Framework.GTest">true</value>
+    <value type="bool" key="AutoTest.Framework.QtQuickTest">true</value>
+    <value type="bool" key="AutoTest.Framework.QtTest">true</value>
+   </valuemap>
+   <valuemap type="QVariantMap" key="AutoTest.CheckStates"/>
+   <value type="int" key="AutoTest.RunAfterBuild">0</value>
+   <value type="bool" key="AutoTest.UseGlobal">true</value>
+   <valuemap type="QVariantMap" key="ClangTools">
+    <value type="bool" key="ClangTools.AnalyzeOpenFiles">true</value>
+    <value type="bool" key="ClangTools.BuildBeforeAnalysis">true</value>
+    <value type="QString" key="ClangTools.DiagnosticConfig">Builtin.DefaultTidyAndClazy</value>
+    <value type="int" key="ClangTools.ParallelJobs">4</value>
+    <valuelist type="QVariantList" key="ClangTools.SelectedDirs"/>
+    <valuelist type="QVariantList" key="ClangTools.SelectedFiles"/>
+    <valuelist type="QVariantList" key="ClangTools.SuppressedDiagnostics"/>
+    <value type="bool" key="ClangTools.UseGlobalSettings">true</value>
+   </valuemap>
+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.Target.0</variable>
+  <valuemap type="QVariantMap">
+   <value type="QString" key="DeviceType">Desktop</value>
+   <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Qt 6.3.1 GCC 64bit</value>
+   <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Qt 6.3.1 GCC 64bit</value>
+   <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">{70d5e2e6-ad48-44fa-b4dd-c54058c4b48b}</value>
+   <value type="qlonglong" key="ProjectExplorer.Target.ActiveBuildConfiguration">0</value>
+   <value type="qlonglong" key="ProjectExplorer.Target.ActiveDeployConfiguration">0</value>
+   <value type="qlonglong" key="ProjectExplorer.Target.ActiveRunConfiguration">0</value>
+   <valuemap type="QVariantMap" key="ProjectExplorer.Target.BuildConfiguration.0">
+    <value type="QString" key="CMake.Build.Type">Debug</value>
+    <value type="bool" key="CMake.Configure.ClearSystemEnvironment">false</value>
+    <valuelist type="QVariantList" key="CMake.Configure.UserEnvironmentChanges"/>
+    <value type="QString" key="CMake.Initial.Parameters">-DCMAKE_GENERATOR:STRING=Ninja
+-DCMAKE_BUILD_TYPE:STRING=Debug
+-DQT_QMAKE_EXECUTABLE:FILEPATH=%{Qt:qmakeExecutable}
+-DCMAKE_PREFIX_PATH:PATH=%{Qt:QT_INSTALL_PREFIX}
+-DCMAKE_C_COMPILER:FILEPATH=%{Compiler:Executable:C}
+-DCMAKE_CXX_COMPILER:FILEPATH=%{Compiler:Executable:Cxx}
+-DCMAKE_CXX_FLAGS_INIT:STRING=%{Qt:QML_DEBUG_FLAG}</value>
+    <value type="QString" key="CMake.Source.Directory">/home/kapper/Code/klips/cpp/qt/designer-plugin-collection</value>
+    <value type="QString" key="ProjectExplorer.BuildConfiguration.BuildDirectory">/home/kapper/Code/klips/cpp/qt/designer-plugin-collection/cmake-build-debug</value>
+    <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.0">
+     <valuemap type="QVariantMap" key="ProjectExplorer.BuildStepList.Step.0">
+      <value type="QString" key="CMakeProjectManager.MakeStep.BuildPreset"></value>
+      <valuelist type="QVariantList" key="CMakeProjectManager.MakeStep.BuildTargets">
+       <value type="QString">all</value>
+      </valuelist>
+      <value type="bool" key="CMakeProjectManager.MakeStep.ClearSystemEnvironment">false</value>
+      <valuelist type="QVariantList" key="CMakeProjectManager.MakeStep.UserEnvironmentChanges"/>
+      <value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Build</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">CMakeProjectManager.MakeStep</value>
+     </valuemap>
+     <value type="qlonglong" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DefaultDisplayName">Build</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Build</value>
+     <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">ProjectExplorer.BuildSteps.Build</value>
+    </valuemap>
+    <valuemap type="QVariantMap" key="ProjectExplorer.BuildConfiguration.BuildStepList.1">
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+      <value type="QString" key="CMakeProjectManager.MakeStep.BuildPreset"></value>
+      <valuelist type="QVariantList" key="CMakeProjectManager.MakeStep.BuildTargets">
+       <value type="QString">clean</value>
+      </valuelist>
+      <value type="bool" key="CMakeProjectManager.MakeStep.ClearSystemEnvironment">false</value>
+      <valuelist type="QVariantList" key="CMakeProjectManager.MakeStep.UserEnvironmentChanges"/>
+      <value type="bool" key="ProjectExplorer.BuildStep.Enabled">true</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.DisplayName">Build</value>
+      <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">CMakeProjectManager.MakeStep</value>
+     </valuemap>
+     <value type="qlonglong" key="ProjectExplorer.BuildStepList.StepsCount">1</value>
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+    </valuemap>
+    <value type="int" key="ProjectExplorer.BuildConfiguration.BuildStepListCount">2</value>
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+    <value type="bool" key="Analyzer.QmlProfiler.Settings.UseGlobalSettings">true</value>
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+    <valuelist type="QVariantList" key="PE.EnvironmentAspect.Changes"/>
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+    <value type="QString" key="ProjectExplorer.ProjectConfiguration.Id">CMakeProjectManager.CMakeRunConfiguration.widget-app</value>
+    <value type="QString" key="ProjectExplorer.RunConfiguration.BuildKey">widget-app</value>
+    <value type="bool" key="RunConfiguration.UseCppDebugger">false</value>
+    <value type="bool" key="RunConfiguration.UseCppDebuggerAuto">true</value>
+    <value type="bool" key="RunConfiguration.UseLibrarySearchPath">true</value>
+    <value type="bool" key="RunConfiguration.UseQmlDebugger">false</value>
+    <value type="bool" key="RunConfiguration.UseQmlDebuggerAuto">true</value>
+    <value type="QString" key="RunConfiguration.WorkingDirectory.default">/home/kapper/Code/klips/cpp/qt/designer-plugin-collection/cmake-build-debug</value>
+   </valuemap>
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+  </valuemap>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.TargetCount</variable>
+  <value type="qlonglong">1</value>
+ </data>
+ <data>
+  <variable>ProjectExplorer.Project.Updater.FileVersion</variable>
+  <value type="int">22</value>
+ </data>
+ <data>
+  <variable>Version</variable>
+  <value type="int">22</value>
+ </data>
+</qtcreator>

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