Drag and drop model loading (#14)

2023-12-27 19:36:47 +00:00
parent e889785b65
commit ad59d9149e
37 changed files with 774 additions and 354 deletions
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -13,14 +13,14 @@ install(
    FILES
    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
-    COMPONENT libqtk
+    COMPONENT qtk_library
    DESTINATION lib/cmake/${PROJECT_NAME}
 )
 install(
    EXPORT qtk_export
    FILE ${PROJECT_NAME}Targets.cmake
    NAMESPACE ${PROJECT_NAME}::
-    COMPONENT libqtk
+    COMPONENT qtk_library
    DESTINATION lib/cmake/${PROJECT_NAME}
 )
 # System install for qtk_library
@@ -28,53 +28,45 @@ install(
    TARGETS qtk_library
    # Associate qtk_library target with qtk-export
    EXPORT qtk_export
-    COMPONENT libqtk
+    COMPONENT qtk_library
    FILE_SET HEADERS DESTINATION include
    INCLUDES DESTINATION include
    LIBRARY DESTINATION lib
-    ARCHIVE DESTINATION lib/static
+    ARCHIVE DESTINATION lib
    RUNTIME DESTINATION bin
 )

 # Qtk Application
-if(QTK_BUILD_GUI OR QTK_INSTALL_PLUGINS)
+if(QTK_GUI OR QTK_PLUGINS)
  add_subdirectory(app)
 endif()

-if(QTK_INSTALL_PLUGINS)
-  # Optionally install custom Qtk plugins for Qt Designer.
+if(QTK_PLUGINS)
  install(
-      TARGETS qtk_library qtk_plugin_library
-      COMPONENT collection
-      LIBRARY DESTINATION "${QTK_PLUGIN_LIBRARY_DIR}"
-      ARCHIVE DESTINATION "${QTK_PLUGIN_LIBRARY_DIR}"
-      RUNTIME DESTINATION "${QTK_PLUGIN_LIBRARY_DIR}"
-  )
-  install(
-      TARGETS qtk_collection
-      COMPONENT collection
+      TARGETS qtk_plugins qtk_library qtk_plugin_library
+      COMPONENT qtk_plugins
      LIBRARY DESTINATION "${QTK_PLUGIN_INSTALL_DIR}"
      ARCHIVE DESTINATION "${QTK_PLUGIN_INSTALL_DIR}"
      RUNTIME DESTINATION "${QTK_PLUGIN_INSTALL_DIR}"
  )
 endif()

-if(QTK_BUILD_GUI)
+if(QTK_GUI)
  install(
-      TARGETS qtk_app
-      COMPONENT qtk
+      TARGETS qtk_gui
+      COMPONENT qtk_gui
      BUNDLE DESTINATION .
      LIBRARY DESTINATION lib
-      ARCHIVE DESTINATION lib/static
+      ARCHIVE DESTINATION lib
      RUNTIME DESTINATION bin
  )

  qt_generate_deploy_app_script(
-      TARGET qtk_app
+      TARGET qtk_gui
      OUTPUT_SCRIPT QTK_DEPLOY_SCRIPT
      NO_UNSUPPORTED_PLATFORM_ERROR
  )
-  install(SCRIPT ${QTK_DEPLOY_SCRIPT} COMPONENT qtk)
+  install(SCRIPT ${QTK_DEPLOY_SCRIPT} COMPONENT qtk_gui)

  if(WIN32)
    if(MSVC AND TARGET Qt6::qmake)
@@ -87,7 +79,7 @@ if(QTK_BUILD_GUI)
      )
      file(TO_NATIVE_PATH "${QT6_INSTALL_PREFIX}/bin" QT6_INSTALL_PREFIX)

-      set(VSUSER_FILE "${CMAKE_CURRENT_BINARY_DIR}/qtk_app.vcxproj.user")
+      set(VSUSER_FILE "${CMAKE_CURRENT_BINARY_DIR}/qtk_gui.vcxproj.user")
      file(WRITE ${VSUSER_FILE} "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n")
      file(APPEND ${VSUSER_FILE} "<Project xmlns=\"http://schemas.microsoft.com/developer/msbuild/2003\">\n")
      file(APPEND ${VSUSER_FILE} "  <PropertyGroup>\n")
@@ -124,7 +116,7 @@ set(CPACK_THREADS 0)
 set(CPACK_PACKAGE_INSTALL_DIRECTORY "Qtk")

 # Remove any assimp components if defined by submodule.
-if (QTK_UPDATE_SUBMODULES)
+if (QTK_SUBMODULES)
  get_cmake_property(CPACK_COMPONENTS_ALL COMPONENTS)
  list(FILTER CPACK_COMPONENTS_ALL EXCLUDE REGEX .*assimp.*)
  list(REMOVE_ITEM CPACK_COMPONENTS_ALL Unspecified)
@@ -136,7 +128,7 @@ set(CPACK_NSIS_ENABLE_UNINSTALL_BEFORE_INSTALL ON)
 # https://nsis.sourceforge.io/Reference/CreateShortCut
 set(
    CPACK_NSIS_CREATE_ICONS_EXTRA
-    "CreateShortCut '$SMPROGRAMS\\\\$STARTMENU_FOLDER\\\\Qtk.lnk' '$INSTDIR\\\\bin\\\\qtk_app.exe'"
+    "CreateShortCut '$SMPROGRAMS\\\\$STARTMENU_FOLDER\\\\Qtk.lnk' '$INSTDIR\\\\bin\\\\qtk_gui.exe'"
 )
 set(
    CPACK_NSIS_DELETE_ICONS_EXTRA
@@ -152,7 +144,7 @@ set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)

 # OSX
 set(CPACK_BUNDLE_NAME ${PROJECT_NAME})
-set(CPACK_BUNDLE_PLIST $<TARGET_BUNDLE_CONTENT_DIR:qtk_app>/Info.plist)
+set(CPACK_BUNDLE_PLIST $<TARGET_BUNDLE_CONTENT_DIR:qtk_gui>/Info.plist)
 set(CPACK_BUNDLE_ICON ${QTK_OSX_ICONS})

 # Platform defaults for source bundles.
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -33,32 +33,32 @@ target_sources(
 target_link_libraries(qtk_plugin_library PUBLIC Qt6::UiPlugin qtk_library)

 ################################################################################
-# Qtk Widget Collection Plugin
+# Qtk Widget Plugins
 ################################################################################
 # Create a Qt Designer plugin for a collection of widgets from our library.
-qt_add_plugin(qtk_collection SHARED)
+qt_add_plugin(qtk_plugins SHARED)
 target_sources(
-    qtk_collection PRIVATE
+    qtk_plugins PRIVATE
    widgetplugincollection.cpp widgetplugincollection.h
    widgetplugin.cpp widgetplugin.h
 )
-target_link_libraries(qtk_collection PUBLIC qtk_plugin_library)
+target_link_libraries(qtk_plugins PUBLIC qtk_plugin_library)

 ################################################################################
 # Final Qtk Application
 ################################################################################

 set(
-    QTK_APP_SOURCES
+    QTK_GUI_SOURCES
    qtkscene.cpp qtkscene.h
    main.cpp
 )

-qt_add_executable(qtk_app ${QTK_APP_SOURCES})
-target_link_libraries(qtk_app PRIVATE qtk_plugin_library)
+qt_add_executable(qtk_gui ${QTK_GUI_SOURCES})
+target_link_libraries(qtk_gui PRIVATE qtk_plugin_library)

 set_target_properties(
-    qtk_app PROPERTIES
+    qtk_gui PROPERTIES
      WIN32_EXECUTABLE TRUE
      MACOSX_BUNDLE TRUE
      MACOSX_BUNDLE_BUNDLE_NAME Qtk
--- a/src/app/qtkmainwindow.cpp
+++ b/src/app/qtkmainwindow.cpp
@@ -29,17 +29,30 @@ MainWindow::MainWindow(QWidget * parent) : QMainWindow(parent) {
  for(auto & qtkWidget : qtkWidgets) {
    qtkWidget->setScene(new Qtk::SceneEmpty);
    views_.emplace(qtkWidget->getScene()->getSceneName(), qtkWidget);
+
+    // Add GUI 'view' toolbar option to show debug console.
    ui_->menuView->addAction(qtkWidget->getActionToggleConsole());
+    // Refresh GUI widgets when scene or objects are updated.
    connect(
        qtkWidget->getScene(), &Qtk::Scene::sceneUpdated, this,
        &MainWindow::refreshScene);
+    connect(
+        qtkWidget, &Qtk::QtkWidget::objectFocusChanged, ui_->qtk__ToolBox,
+        &Qtk::ToolBox::updateFocus);
  }

-  auto docks = findChildren<QDockWidget *>();
-  for(auto & dock : docks) {
-    addDockWidget(Qt::RightDockWidgetArea, dock);
-    ui_->menuView->addAction(dock->toggleViewAction());
-  }
+  // TODO: Fix / use MainWindow in Qt Designer to add these dock widgets.
+  // For now we will add them manually, but we should be able to do this in the
+  // designer. At the moment if you edit the UI in designer the dock widget
+  // areas below will override the designer settings.
+
+  // Dock the toolbox widget to the main window.
+  addDockWidget(Qt::LeftDockWidgetArea, ui_->qtk__ToolBox);
+  // Add an option to toggle active widgets in the GUI's toolbar 'view' menu.
+  ui_->menuView->addAction(ui_->qtk__ToolBox->toggleViewAction());
+
+  addDockWidget(Qt::RightDockWidgetArea, ui_->qtk__TreeView);
+  ui_->menuView->addAction(ui_->qtk__TreeView->toggleViewAction());

  // Set the window icon used for Qtk.
  setWindowIcon(Qtk::getIcon());
@@ -74,7 +87,7 @@ Qtk::QtkWidget * MainWindow::getQtkWidget(const QString & name) {
  return views_[name];
 }

-void MainWindow::refreshScene(QString sceneName) {
-  // TODO: Select TreeView using sceneName>
+void MainWindow::refreshScene(const QString & sceneName) {
+  // TODO: Select TreeView using sceneName
  ui_->qtk__TreeView->updateView(getQtkWidget()->getScene());
 }
--- a/src/app/qtkmainwindow.h
+++ b/src/app/qtkmainwindow.h
@@ -69,7 +69,7 @@ class MainWindow : public QMainWindow {
     * Trigger a refresh for widgets related to a scene that has been updated.
     * @param sceneName The name of the scene that has been modified.
     */
-    void refreshScene(QString sceneName);
+    void refreshScene(const QString & sceneName);

  private:
    /***************************************************************************
--- a/src/app/qtkmainwindow.ui
+++ b/src/app/qtkmainwindow.ui
@@ -6,7 +6,7 @@
   <rect>
    <x>0</x>
    <y>0</y>
-    <width>824</width>
+    <width>1034</width>
    <height>601</height>
   </rect>
  </property>
@@ -28,11 +28,27 @@
  </property>
  <widget class="QWidget" name="centralwidget">
   <layout class="QHBoxLayout" name="horizontalLayout">
+    <item>
+     <widget class="Qtk::ToolBox" name="qtk::ToolBox">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+        <horstretch>1</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="toolTip">
+       <string>Object details and configuration panel.</string>
+      </property>
+      <property name="whatsThis">
+       <string>When an object is double-clicked in the TreeView for a scene, this panel will display relevant details and options.</string>
+      </property>
+     </widget>
+    </item>
    <item>
     <widget class="QTabWidget" name="tabWidget">
      <property name="sizePolicy">
       <sizepolicy hsizetype="Expanding" vsizetype="Expanding">
-        <horstretch>0</horstretch>
+        <horstretch>3</horstretch>
        <verstretch>0</verstretch>
       </sizepolicy>
      </property>
@@ -50,10 +66,10 @@
        <item>
         <widget class="Qtk::QtkWidget" name="qtk::QtkWidget">
          <property name="toolTip">
-           <string>A custom widget tool tip.</string>
+           <string/>
          </property>
          <property name="whatsThis">
-           <string>Custom widget what's this?</string>
+           <string>Qtk scene view rendered using OpenGL.</string>
          </property>
         </widget>
        </item>
@@ -67,28 +83,20 @@
     </widget>
    </item>
    <item>
-     <layout class="QVBoxLayout" name="verticalLayout">
-      <item>
-       <widget class="Qtk::TreeView" name="qtk::TreeView">
-        <property name="toolTip">
-         <string>A custom widget tool tip.</string>
-        </property>
-        <property name="whatsThis">
-         <string>Custom widget what's this?</string>
-        </property>
-       </widget>
-      </item>
-      <item>
-       <widget class="Qtk::ToolBox" name="qtk::ToolBox">
-        <property name="toolTip">
-         <string>A custom widget tool tip.</string>
-        </property>
-        <property name="whatsThis">
-         <string>Custom widget what's this?</string>
-        </property>
-       </widget>
-      </item>
-     </layout>
+     <widget class="Qtk::TreeView" name="qtk::TreeView">
+      <property name="sizePolicy">
+       <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+        <horstretch>1</horstretch>
+        <verstretch>0</verstretch>
+       </sizepolicy>
+      </property>
+      <property name="toolTip">
+       <string>TreeView of objects within the current scene.</string>
+      </property>
+      <property name="whatsThis">
+       <string>TreeView of objects within the current scene. Double-click to select an object and snap to it's position.</string>
+      </property>
+     </widget>
    </item>
   </layout>
  </widget>
@@ -97,7 +105,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-     <width>824</width>
+     <width>1034</width>
     <height>22</height>
    </rect>
   </property>
@@ -179,7 +187,7 @@
  </widget>
  <action name="actionOpen">
   <property name="icon">
-    <iconset resource="../../resources/resources.qrc">
+    <iconset>
     <normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/regular/folder-open.svg</normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/regular/folder-open.svg</iconset>
   </property>
   <property name="text">
@@ -188,7 +196,7 @@
  </action>
  <action name="actionSave">
   <property name="icon">
-    <iconset resource="../../resources/resources.qrc">
+    <iconset>
     <normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/regular/floppy-disk.svg</normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/regular/floppy-disk.svg</iconset>
   </property>
   <property name="text">
@@ -215,7 +223,7 @@
  </action>
  <action name="actionLoad_Model">
   <property name="icon">
-    <iconset resource="../../resources/resources.qrc">
+    <iconset>
     <normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/solid/cube.svg</normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/solid/cube.svg</iconset>
   </property>
   <property name="text">
@@ -227,7 +235,7 @@
  </action>
  <action name="actionDelete_Object">
   <property name="icon">
-    <iconset resource="../../resources/resources.qrc">
+    <iconset>
     <normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/regular/trash-can.svg</normaloff>:/icons/fontawesome-free-6.2.1-desktop/svgs/regular/trash-can.svg</iconset>
   </property>
   <property name="text">
@@ -318,9 +326,7 @@
   <container>1</container>
  </customwidget>
 </customwidgets>
- <resources>
-  <include location="../../resources/resources.qrc"/>
- </resources>
+ <resources/>
 <connections>
  <connection>
   <sender>actionExit</sender>
--- a/src/app/qtkscene.cpp
+++ b/src/app/qtkscene.cpp
@@ -38,11 +38,12 @@ void QtkScene::init() {
  /* Create a red cube with a mini master chief on top. */
  auto myCube = new MeshRenderer("My cube", Cube(Qtk::QTK_DRAW_ELEMENTS));
  myCube->setColor(RED);
+  myCube->getTransform().setTranslation(5.0f, 0.0f, 0.0f);
  addObject(myCube);

  auto mySpartan =
      new Model("My spartan", ":/models/models/spartan/spartan.obj");
-  mySpartan->getTransform().setTranslation(0.0f, 0.5f, 0.0f);
+  mySpartan->getTransform().setTranslation(5.0f, 0.5f, 0.0f);
  mySpartan->getTransform().setScale(0.5f);
  addObject(mySpartan);

--- a/src/app/qtkwidget.cpp
+++ b/src/app/qtkwidget.cpp
@@ -7,6 +7,12 @@
 ##############################################################################*/

 #include <QKeyEvent>
+#include <QMimeData>
+#include <QVBoxLayout>
+
+#include <qtk/input.h>
+#include <qtk/scene.h>
+#include <qtk/shape.h>
 #include <QVBoxLayout>

 #include <qtk/input.h>
@@ -31,6 +37,7 @@ QtkWidget::QtkWidget(QWidget * parent, const QString & name) :
 QtkWidget::QtkWidget(QWidget * parent, const QString & name, Scene * scene) :
    QOpenGLWidget(parent), mDebugLogger(Q_NULLPTR),
    mConsole(new DebugConsole(this, name)), mScene(Q_NULLPTR) {
+  setAcceptDrops(true);
  setScene(scene);
  setObjectName(name);
  QSurfaceFormat format;
@@ -70,6 +77,7 @@ void QtkWidget::initializeGL() {
  // Connect the frameSwapped signal to call the update() function
  connect(this, SIGNAL(frameSwapped()), this, SLOT(update()));

+  toggleConsole();
  // Initialize OpenGL debug context
  mDebugLogger = new QOpenGLDebugLogger(this);
  if(mDebugLogger->initialize()) {
@@ -107,11 +115,11 @@ void QtkWidget::paintGL() {
  }
 }

-void QtkWidget::setScene(Qtk::Scene * scene) {
+void QtkWidget::setScene(Scene * scene) {
  if(mScene != Q_NULLPTR) {
    delete mScene;
    connect(
-        scene, &Qtk::Scene::sceneUpdated, MainWindow::getMainWindow(),
+        scene, &Scene::sceneUpdated, MainWindow::getMainWindow(),
        &MainWindow::refreshScene);
  }

@@ -129,8 +137,7 @@ void QtkWidget::toggleConsole() {
    mConsoleActive = false;
  } else {
    MainWindow::getMainWindow()->addDockWidget(
-        Qt::DockWidgetArea::BottomDockWidgetArea,
-        dynamic_cast<QDockWidget *>(mConsole));
+        Qt::DockWidgetArea::BottomDockWidgetArea, mConsole);
    mConsole->setHidden(false);
    mConsoleActive = true;
  }
@@ -140,6 +147,34 @@ void QtkWidget::toggleConsole() {
 * Protected Methods
 ******************************************************************************/

+void QtkWidget::dragEnterEvent(QDragEnterEvent * event) {
+  if(event->mimeData()->hasFormat("text/plain")) {
+    event->acceptProposedAction();
+  }
+}
+
+void QtkWidget::dropEvent(QDropEvent * event) {
+  mConsole->sendLog(event->mimeData()->text());
+  auto urls = event->mimeData()->urls();
+  if(!urls.isEmpty()) {
+    if(urls.size() > 1) {
+      qDebug() << "Cannot accept drop of multiple files.";
+      event->ignore();
+      return;
+    }
+
+    // TODO: Support other object types.
+    auto url = urls.front();
+    if(url.fileName().endsWith(".obj")) {
+      mScene->loadModel(url);
+      event->acceptProposedAction();
+    } else {
+      qDebug() << "Unsupported file type: " + url.fileName() + "\n";
+      event->ignore();
+    }
+  }
+}
+
 void QtkWidget::keyPressEvent(QKeyEvent * event) {
  if(event->isAutoRepeat()) {
    // Do not repeat input while a key is held down
@@ -253,7 +288,8 @@ void QtkWidget::teardownGL() { /* Nothing to teardown yet... */
 void QtkWidget::updateCameraInput() {
  Input::update();
  // Camera Transformation
-  if(Input::buttonPressed(Qt::RightButton)) {
+  if(Input::buttonPressed(Qt::LeftButton)
+     || Input::buttonPressed(Qt::RightButton)) {
    static const float transSpeed = 0.1f;
    static const float rotSpeed = 0.5f;

--- a/src/app/qtkwidget.h
+++ b/src/app/qtkwidget.h
@@ -131,11 +131,19 @@ namespace Qtk {
       */
      void sendLog(const QString & message, DebugContext context = Status);

+      // TODO: Use this signal in treeview and toolbox to update object
+      // properties
+      void objectFocusChanged(const QString objectName);
+
    protected:
      /*************************************************************************
       * Protected Methods
       ************************************************************************/

+      void dragEnterEvent(QDragEnterEvent * event) override;
+
+      void dropEvent(QDropEvent * event) override;
+
      /**
       * @param event Key press event to update camera input manager.
       */
@@ -166,6 +174,7 @@ namespace Qtk {
      /**
       * Called when the `messageLogged` signal is caught.
       * See definition of initializeGL()
+       * https://doc.qt.io/qt-6/qopengldebuglogger.html#signals
       *
       * @param msg The message logged.
       */
--- a/src/app/toolbox.cpp
+++ b/src/app/toolbox.cpp
@@ -8,13 +8,142 @@
 */

 #include "toolbox.h"
+#include "qtkmainwindow.h"
 #include "ui_toolbox.h"

-Qtk::ToolBox::ToolBox(QWidget * parent) :
-    QDockWidget(parent), ui(new Ui::ToolBox) {
+#include <QFormLayout>
+#include <QLabel>
+
+using namespace Qtk;
+
+ToolBox::ToolBox(QWidget * parent) : QDockWidget(parent), ui(new Ui::ToolBox) {
  ui->setupUi(this);
+  setMinimumWidth(350);
 }

-Qtk::ToolBox::~ToolBox() {
+void ToolBox::updateFocus(const QString & name) {
+  auto object =
+      MainWindow::getMainWindow()->getQtkWidget()->getScene()->getObject(name);
+  if(object != Q_NULLPTR) {
+    removePages();
+    createPageProperties(object);
+    createPageShader(object);
+  }
+}
+
+ToolBox::~ToolBox() {
  delete ui;
 }
+
+void ToolBox::removePages() {
+  // Remove all existing pages.
+  for(size_t i = 0; i < ui->toolBox->count(); i++) {
+    delete ui->toolBox->widget(i);
+    ui->toolBox->removeItem(i);
+  }
+}
+
+void ToolBox::createPageProperties(const Object * object) {
+  auto transform = object->getTransform();
+  auto type = object->getType();
+  auto * widget = new QWidget;
+  ui->toolBox->addItem(widget, "Properties");
+  ui->toolBox->setCurrentWidget(widget);
+
+  auto * layout = new QFormLayout;
+  layout->addRow(
+      new QLabel(tr("Name:")), new QLabel(object->getName().c_str()));
+
+  layout->addRow(
+      new QLabel(tr("Type:")),
+      new QLabel(type == Object::Type::QTK_MESH ? "Mesh" : "Model"));
+
+  auto rowLayout = new QHBoxLayout;
+  rowLayout->addWidget(new QLabel(tr("Translation:")));
+  int minWidth = 75;
+  for(size_t i = 0; i < 3; i++) {
+    auto spinBox = new QDoubleSpinBox;
+    spinBox->setMinimum(std::numeric_limits<double>::lowest());
+    spinBox->setSingleStep(0.1);
+    spinBox->setValue(transform.getTranslation()[i]);
+    spinBox->setFixedWidth(minWidth);
+    rowLayout->addWidget(spinBox);
+
+    if(i == 0) {
+      connect(
+          spinBox, &QDoubleSpinBox::valueChanged, object,
+          &Object::setTranslationX);
+    } else if(i == 1) {
+      connect(
+          spinBox, &QDoubleSpinBox::valueChanged, object,
+          &Object::setTranslationY);
+    } else if(i == 2) {
+      connect(
+          spinBox, &QDoubleSpinBox::valueChanged, object,
+          &Object::setTranslationZ);
+    }
+  }
+  layout->addRow(rowLayout);
+
+  rowLayout = new QHBoxLayout;
+  rowLayout->addWidget(new QLabel(tr("Scale:")));
+  for(size_t i = 0; i < 3; i++) {
+    auto spinBox = new QDoubleSpinBox;
+    spinBox->setMinimum(std::numeric_limits<double>::lowest());
+    spinBox->setSingleStep(0.1);
+    spinBox->setValue(transform.getScale()[i]);
+    spinBox->setFixedWidth(minWidth);
+    rowLayout->addWidget(spinBox);
+
+    if(i == 0) {
+      connect(
+          spinBox, &QDoubleSpinBox::valueChanged, object, &Object::setScaleX);
+    } else if(i == 1) {
+      connect(
+          spinBox, &QDoubleSpinBox::valueChanged, object, &Object::setScaleY);
+    } else if(i == 2) {
+      connect(
+          spinBox, &QDoubleSpinBox::valueChanged, object, &Object::setScaleZ);
+    }
+  }
+  layout->addRow(rowLayout);
+  widget->setLayout(layout);
+}
+
+void ToolBox::createPageShader(const Object * object) {
+  // Shaders page.
+  auto widget = new QWidget;
+  ui->toolBox->addItem(widget, "Shaders");
+  auto mainLayout = new QFormLayout;
+  auto rowLayout = new QHBoxLayout;
+  rowLayout->addWidget(new QLabel("Vertex Shader:"));
+  rowLayout->addWidget(new QLabel(object->getVertexShader().c_str()));
+  mainLayout->addRow(rowLayout);
+
+  auto shaderView = new QTextEdit;
+  shaderView->setReadOnly(true);
+  auto vertexFile = QFile(object->getVertexShader().c_str());
+  if(vertexFile.exists()) {
+    vertexFile.open(QIODeviceBase::ReadOnly);
+    shaderView->setText(vertexFile.readAll());
+    vertexFile.close();
+    mainLayout->addRow(shaderView);
+  }
+
+  rowLayout = new QHBoxLayout;
+  rowLayout->addWidget(new QLabel("Fragment Shader:"));
+  rowLayout->addWidget(new QLabel(object->getFragmentShader().c_str()));
+  mainLayout->addRow(rowLayout);
+
+  shaderView = new QTextEdit;
+  shaderView->setReadOnly(true);
+  auto fragmentfile = QFile(object->getFragmentShader().c_str());
+  if(fragmentfile.exists()) {
+    fragmentfile.open(QIODeviceBase::ReadOnly);
+    shaderView->setText(fragmentfile.readAll());
+    fragmentfile.close();
+    mainLayout->addRow(shaderView);
+  }
+
+  widget->setLayout(mainLayout);
+}
--- a/src/app/toolbox.h
+++ b/src/app/toolbox.h
@@ -12,6 +12,11 @@

 #include <QDesignerExportWidget>
 #include <QDockWidget>
+#include <QDoubleSpinBox>
+#include <QGroupBox>
+
+
+#include "qtk/scene.h"

 namespace Ui {
  class ToolBox;
@@ -30,6 +35,15 @@ namespace Qtk {

      ~ToolBox();

+      void removePages();
+
+      void createPageProperties(const Object * object);
+
+      void createPageShader(const Object * object);
+
+      void updateFocus(const QString & name);
+
+
    private:
      /*************************************************************************
       * Private Members
--- a/src/app/toolbox.ui
+++ b/src/app/toolbox.ui
@@ -10,17 +10,57 @@
    <height>300</height>
   </rect>
  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="minimumSize">
+   <size>
+    <width>86</width>
+    <height>167</height>
+   </size>
+  </property>
  <property name="windowTitle">
   <string>Object Details</string>
  </property>
  <widget class="QWidget" name="dockWidgetContents">
-   <layout class="QHBoxLayout" name="horizontalLayout">
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <layout class="QVBoxLayout" name="verticalLayout">
    <item>
     <widget class="QToolBox" name="toolBox">
      <property name="currentIndex">
       <number>0</number>
      </property>
-      <widget class="QWidget" name="page">
+      <widget class="QWidget" name="page_properties">
+       <property name="enabled">
+        <bool>true</bool>
+       </property>
+       <property name="geometry">
+        <rect>
+         <x>0</x>
+         <y>0</y>
+         <width>382</width>
+         <height>201</height>
+        </rect>
+       </property>
+       <property name="sizePolicy">
+        <sizepolicy hsizetype="Preferred" vsizetype="Preferred">
+         <horstretch>0</horstretch>
+         <verstretch>0</verstretch>
+        </sizepolicy>
+       </property>
+       <attribute name="label">
+        <string>Properties</string>
+       </attribute>
+      </widget>
+      <widget class="QWidget" name="page_shaders">
       <property name="geometry">
        <rect>
         <x>0</x>
@@ -33,19 +73,6 @@
        <string>Shaders</string>
       </attribute>
      </widget>
-      <widget class="QWidget" name="page_2">
-       <property name="geometry">
-        <rect>
-         <x>0</x>
-         <y>0</y>
-         <width>382</width>
-         <height>201</height>
-        </rect>
-       </property>
-       <attribute name="label">
-        <string>Properties</string>
-       </attribute>
-      </widget>
     </widget>
    </item>
   </layout>
--- a/src/app/treeview.cpp
+++ b/src/app/treeview.cpp
@@ -48,16 +48,25 @@ void Qtk::TreeView::itemFocus(QTreeWidgetItem * item, int column) {
  auto scene = MainWindow::getMainWindow()->getQtkWidget()->getScene();
  auto & transform = scene->getCamera().getTransform();
  auto object = scene->getObject(name);
+  Transform3D * objectTransform;
+  // If the object is a mesh or model, focus the camera on it.
  if(object == Q_NULLPTR) {
    qDebug() << "Attempt to get non-existing object with name '" << name
             << "'\n";
-  }
-  Transform3D * objectTransform;
-  if(object->getType() == Object::QTK_MESH) {
+  } else if(object->getType() == Object::QTK_MESH) {
    objectTransform = &dynamic_cast<MeshRenderer *>(object)->getTransform();
  } else if(object->getType() == Object::QTK_MODEL) {
    objectTransform = &dynamic_cast<Model *>(object)->getTransform();
  }
-  transform.setTranslation(objectTransform->getTranslation());
+  auto focusScale = objectTransform->getScale();
+  float width = focusScale.x() / 2.0f;
+  float height = focusScale.y() / 2.0f;
+  QVector3D pos = objectTransform->getTranslation();
+  // pos.setX(pos.x() + width);
+  pos.setY(pos.y() + height);
+  transform.setTranslation(pos);
  transform.translate(0.0f, 0.0f, 3.0f);
+
+  // Emit signal from qtk widget for new object focus. Triggers GUI updates.
+  emit MainWindow::getMainWindow()->getQtkWidget()->objectFocusChanged(name);
 }
--- a/src/qtk/CMakeLists.txt
+++ b/src/qtk/CMakeLists.txt
@@ -68,9 +68,9 @@ target_link_libraries(
    Qt6::Core Qt6::OpenGLWidgets Qt6::Widgets
 )

-if(QTK_UPDATE_SUBMODULES OR NOT ASSIMP_NEW_INTERFACE)
+if(QTK_SUBMODULES OR NOT QTK_ASSIMP_NEW_INTERFACE)
  target_link_libraries(qtk_library PUBLIC assimp)
-elseif(ASSIMP_NEW_INTERFACE)
+elseif(QTK_ASSIMP_NEW_INTERFACE)
  target_link_libraries(qtk_library PUBLIC assimp::assimp)
 endif()

--- a/src/qtk/meshrenderer.h
+++ b/src/qtk/meshrenderer.h
@@ -211,6 +211,14 @@ namespace Qtk {
       */
      inline Transform3D & getTransform() { return mTransform; }

+      inline std::string getVertexShader() const override {
+        return mVertexShader;
+      }
+
+      inline std::string getFragmentShader() const override {
+        return mFragmentShader;
+      }
+
    private:
      /*************************************************************************
       * Private Members
--- a/src/qtk/model.cpp
+++ b/src/qtk/model.cpp
@@ -43,7 +43,7 @@ void Model::flipTexture(const std::string & fileName, bool flipX, bool flipY) {
      texture.mTexture->destroy();
      texture.mTexture->create();
      texture.mTexture->setData(
-          *OpenGLTextureFactory::initImage(fullPath.c_str(), flipX, flipY));
+          OpenGLTextureFactory::initImage(fullPath.c_str(), flipX, flipY));
      modified = true;
    }
  }
@@ -238,7 +238,7 @@ ModelMesh::Textures Model::loadMaterialTextures(
      // Add the texture to the textures container
      textures.push_back(texture);
      // Add the texture to the loaded textures to avoid loading it twice
-      mTexturesLoaded.push_back(texture);
+      mTexturesLoaded.push_back(textures.back());
    }
  }

--- a/src/qtk/model.h
+++ b/src/qtk/model.h
@@ -18,6 +18,9 @@
 #include <assimp/Importer.hpp>

 // Qtk
+#include <QFileInfo>
+
+
 #include "modelmesh.h"
 #include "qtkapi.h"

@@ -124,6 +127,14 @@ namespace Qtk {
       */
      inline Transform3D & getTransform() { return mTransform; }

+      inline std::string getVertexShader() const override {
+        return mVertexShader;
+      }
+
+      inline std::string getFragmentShader() const override {
+        return mFragmentShader;
+      }
+
    private:
      /*************************************************************************
       * Private Methods
--- a/src/qtk/modelmesh.cpp
+++ b/src/qtk/modelmesh.cpp
@@ -52,6 +52,10 @@ void ModelMesh::draw(QOpenGLShaderProgram & shader) {
    shader.setUniformValue((name + number).c_str(), i);
  }

+  // Always reset active texture to GL_TEXTURE0 before we draw.
+  // This is important for models with no textures.
+  glActiveTexture(GL_TEXTURE0);
+
  // Draw the mesh
  glDrawElements(
      GL_TRIANGLES, mIndices.size(), GL_UNSIGNED_INT, mIndices.data());
@@ -62,7 +66,6 @@ void ModelMesh::draw(QOpenGLShaderProgram & shader) {
  }
  shader.release();
  mVAO->release();
-  glActiveTexture(GL_TEXTURE0);
 }

 /*******************************************************************************
--- a/src/qtk/modelmesh.h
+++ b/src/qtk/modelmesh.h
@@ -30,6 +30,21 @@ namespace Qtk {
   * Struct to store model textures. 3D Models may have multiple.
   */
  struct QTKAPI ModelTexture {
+      ModelTexture() = default;
+
+      /**
+       * Construct a ModelTexture.
+       *
+       * @param id Texture ID for this texture.
+       * @param type Type of texture in string format.
+       * @param path Path to the texture on disk.
+       */
+      ModelTexture(const std::string & type, const std::string & path) :
+          mType(type), mPath(path) {
+        mTexture = OpenGLTextureFactory::initTexture(path.c_str());
+        mID = mTexture->textureId();
+      }
+
      /** Texture ID for for this texture. */
      GLuint mID {};
      QOpenGLTexture * mTexture {};
--- a/src/qtk/object.h
+++ b/src/qtk/object.h
@@ -96,10 +96,24 @@ namespace Qtk {

      [[nodiscard]] inline const Type & getType() const { return mType; }

+      [[nodiscard]] inline virtual const Transform3D & getTransform() const {
+        return mTransform;
+      }
+
+      [[nodiscard]] inline virtual std::string getVertexShader() const {
+        return "Base Object has no vertex shader.";
+      }
+
+      virtual inline std::string getFragmentShader() const {
+        return "Base Object has no fragment shader.";
+      }
+
      /*************************************************************************
       * Setters
       ************************************************************************/

+      virtual inline void setName(const std::string & name) { mName = name; }
+
      virtual inline void setColors(const Colors & value) {
        mShape.mColors = value;
      }
@@ -135,6 +149,39 @@ namespace Qtk {
        mShape.mVertices = value;
      }

+      inline void setScaleX(double x) {
+        mTransform.setScale(
+            x, mTransform.getScale().y(), mTransform.getScale().z());
+      }
+
+      inline void setScaleY(double y) {
+        mTransform.setScale(
+            mTransform.getScale().x(), y, mTransform.getScale().z());
+      }
+
+      inline void setScaleZ(double z) {
+        mTransform.setScale(
+            mTransform.getScale().x(), mTransform.getScale().y(), z);
+      }
+
+      inline void setTranslationX(double x) {
+        mTransform.setTranslation(
+            x, mTransform.getTranslation().y(),
+            mTransform.getTranslation().z());
+      }
+
+      inline void setTranslationY(double y) {
+        mTransform.setTranslation(
+            mTransform.getTranslation().x(), y,
+            mTransform.getTranslation().z());
+      }
+
+      inline void setTranslationZ(double z) {
+        mTransform.setTranslation(
+            mTransform.getTranslation().x(), mTransform.getTranslation().y(),
+            z);
+      }
+
      /*************************************************************************
       * Public Methods
       ************************************************************************/
--- a/src/qtk/scene.cpp
+++ b/src/qtk/scene.cpp
@@ -37,16 +37,42 @@ Scene::~Scene() {
 * Public Methods
 ******************************************************************************/

+template <> MeshRenderer * Scene::addObject(MeshRenderer * object) {
+  initSceneObjectName(object);
+  mMeshes.push_back(object);
+  sceneUpdated(mSceneName);
+  return object;
+}
+
+template <> Model * Scene::addObject(Model * object) {
+  initSceneObjectName(object);
+  mModels.push_back(object);
+  sceneUpdated(mSceneName);
+  return object;
+}
+
 void Scene::draw() {
  if(!mInit) {
    initializeOpenGLFunctions();
    init();
    mInit = true;
  }
+
+  while(!mModelLoadQueue.empty()) {
+    auto modelSpec = mModelLoadQueue.front();
+    // Load the model and add it to the scene.
+    addObject(new Model(modelSpec.first.c_str(), modelSpec.second.c_str()));
+    mModelLoadQueue.pop();
+  }
+
+  if(mPause) {
+    return;
+  }
+
  if(mSkybox != Q_NULLPTR) {
    mSkybox->draw();
  }
-  for(auto & model : mModels) {
+  for(const auto & model : mModels) {
    model->draw();
  }
  for(const auto & mesh : mMeshes) {
@@ -57,8 +83,8 @@ void Scene::draw() {
 std::vector<Object *> Scene::getObjects() const {
  // All scene objects must inherit from Qtk::Object.
  std::vector<Object *> objects(mMeshes.begin(), mMeshes.end());
-  for(auto model : mModels) {
-    objects.push_back(dynamic_cast<Object *>(model));
+  for(const auto & model : mModels) {
+    objects.push_back(model);
    if(objects.back() == nullptr) {
      return {};
    }
@@ -66,8 +92,8 @@ std::vector<Object *> Scene::getObjects() const {
  return objects;
 }

-Object * Scene::getObject(const QString & name) {
-  for(auto object : getObjects()) {
+Object * Scene::getObject(const QString & name) const {
+  for(const auto & object : getObjects()) {
    if(object->getName() == name.toStdString()) {
      return object;
    }
@@ -80,14 +106,14 @@ void Scene::setSkybox(Skybox * skybox) {
  mSkybox = skybox;
 }

-template <> MeshRenderer * Scene::addObject(MeshRenderer * object) {
-  mMeshes.push_back(object);
-  sceneUpdated(mSceneName);
-  return object;
-}
-
-template <> Model * Scene::addObject(Model * object) {
-  mModels.push_back(object);
-  sceneUpdated(mSceneName);
-  return object;
+void Scene::initSceneObjectName(Object * object) {
+  if(!mObjectCount.count(object->getName())) {
+    mObjectCount[object->getName()] = 1;
+  } else {
+    mObjectCount[object->getName()]++;
+  }
+  auto count = mObjectCount[object->getName()];
+  if(count > 1) {
+    object->setName(object->getName() + " (" + std::to_string(count) + ")");
+  }
 }
--- a/src/qtk/scene.h
+++ b/src/qtk/scene.h
@@ -10,7 +10,10 @@
 #define QTK_SCENE_H

 #include <QMatrix4x4>
+#include <QUrl>

+#include <queue>
+#include <unordered_map>
 #include <utility>

 #include "camera3d.h"
@@ -75,6 +78,18 @@ namespace Qtk {
       */
      virtual void update() {}

+      void loadModel(const QUrl & url) {
+        auto fileName = url.fileName().replace(".obj", "").toStdString();
+        auto filePath = url.toLocalFile().toStdString();
+        loadModel(fileName, filePath);
+      }
+
+      void loadModel(const std::string & name, const std::string & path) {
+        // Add the dropped model to the load queue.
+        // This is consumed during rendering of the scene if not empty.
+        mModelLoadQueue.emplace(name, path);
+      }
+
      /*************************************************************************
       * Accessors
       ************************************************************************/
@@ -91,7 +106,16 @@ namespace Qtk {
       * @param name The objectName to look for within this scene.
       * @return The found object or Q_NULLPTR if none found.
       */
-      [[nodiscard]] Object * getObject(const QString & name);
+      [[nodiscard]] Object * getObject(const QString & name) const;
+
+      /**
+       * @return The number of objects within the scene with the given name.
+       */
+      [[nodiscard]] uint64_t getObjectCount(const QString & name) {
+        return mObjectCount.count(name.toStdString())
+                   ? mObjectCount[name.toStdString()]
+                   : 0;
+      }

      /**
       * @return Camera attached to this scene.
@@ -166,6 +190,8 @@ namespace Qtk {
       */
      inline void setSceneName(QString name) { mSceneName = std::move(name); }

+      inline void setPause(bool pause) { mPause = pause; }
+
    signals:
      /**
       * Signal thrown when the scene is modified by adding or removing objects.
@@ -175,7 +201,26 @@ namespace Qtk {
       */
      void sceneUpdated(QString sceneName);

+
+      /*************************************************************************
+       * Public Members
+       ************************************************************************/
+    public:
+      /* Models used for storing 3D models in the scene. */
+      std::vector<Model *> mModels {};
+
+      /* Queue of models requested to load at runtime. */
+      std::queue<std::pair<std::string, std::string>> mModelLoadQueue;
+
    private:
+      /**
+       * Initialize an object name relative to other objects already loaded.
+       * Protects against having two objects with the same name.
+       *
+       * @param object Qtk Object to name within this scene.
+       */
+      void initSceneObjectName(Qtk::Object * object);
+
      /*************************************************************************
       * Private Members
       ************************************************************************/
@@ -183,14 +228,16 @@ namespace Qtk {
      static Camera3D mCamera;
      static QMatrix4x4 mProjection;
      bool mInit = false;
+      /* Pause rendering of the scene. */
+      bool mPause = false;

      QString mSceneName;
      /* The skybox for this scene. */
      Skybox * mSkybox {};
      /* MeshRenderers used simple geometry. */
      std::vector<MeshRenderer *> mMeshes {};
-      /* Models used for storing 3D models in the scene. */
-      std::vector<Model *> mModels {};
+      /* Track count of objects with same initial name. */
+      std::unordered_map<std::string, uint64_t> mObjectCount;
  };

  class SceneEmpty : public Scene {
--- a/src/qtk/texture.cpp
+++ b/src/qtk/texture.cpp
@@ -9,19 +9,18 @@
 #include <QDebug>
 #include <QImageReader>

+#include "app/qtkmainwindow.h"
 #include "texture.h"

 using namespace Qtk;

-QImage * OpenGLTextureFactory::initImage(
+QImage OpenGLTextureFactory::initImage(
    const char * image, bool flipX, bool flipY) {
  // Qt6 limits loaded images to 256MB by default
-  QImageReader::setAllocationLimit(512);
-  auto loadedImage = new QImage(QImage(image).mirrored(flipX, flipY));
-  if(loadedImage->isNull()) {
-    qDebug() << "[Qtk::OpenGLTextureFactory] Error loading image: " << image
-             << "\nSupported types: " << QImageReader::supportedImageFormats();
-    return Q_NULLPTR;
+  QImageReader::setAllocationLimit(1024);
+  auto loadedImage = QImage(image).mirrored(flipX, flipY);
+  if(loadedImage.isNull()) {
+    return defaultTexture();
  }

  return loadedImage;
@@ -29,13 +28,12 @@ QImage * OpenGLTextureFactory::initImage(

 QOpenGLTexture * OpenGLTextureFactory::initTexture(
    const char * texture, bool flipX, bool flipY) {
-  QImage * image = initImage(texture, flipX, flipY);
+  QImage image = initImage(texture, flipX, flipY);
  auto newTexture = new QOpenGLTexture(QOpenGLTexture::Target2D);
-  newTexture->setData(*image);
+  newTexture->setData(image);
  newTexture->setWrapMode(QOpenGLTexture::Repeat);
  newTexture->setMinMagFilters(
      QOpenGLTexture::LinearMipMapLinear, QOpenGLTexture::Linear);
-  delete image;
  return newTexture;
 }

@@ -71,6 +69,7 @@ QOpenGLTexture * OpenGLTextureFactory::initCubeMap(
    QImage faceImage(faceTextures[i]);
    if(faceImage.isNull()) {
      qDebug() << "Error loading cube map image\n";
+      faceImage = defaultTexture();
    }
    faceImage = faceImage.convertToFormat(QImage::Format_RGBA8888);

--- a/src/qtk/texture.h
+++ b/src/qtk/texture.h
@@ -74,9 +74,9 @@ namespace Qtk {
       *    Can be absolute or Qt resource path.
       * @param flipX If true the image will be flipped on X axis.
       * @param flipY If true the image will be flipped on Y axis.
-       * @return Pointer to an initialized QImage object.
+       * @return QImage object.
       */
-      static QImage * initImage(
+      static QImage initImage(
          const char * image, bool flipX = false, bool flipY = false);

      /**
@@ -132,6 +132,14 @@ namespace Qtk {
          const char * right, const char * top, const char * front,
          const char * left, const char * bottom, const char * back);

+      /// The texture used in place of a missing texture.
+      static QImage defaultTexture() {
+        // Use plaster for default texture if image fails to load.
+        // This prevents segfaults when loading a texture that doesn't exist.
+        // TODO: Replace with a '?' texture to indicate missing texture.
+        return QImage(":/textures/plaster.png");
+      }
+
    private:
      // Private ctor to prevent creating instances of this class
      OpenGLTextureFactory() = default;