feat: add Preferences dialog for managing theme, rendering, and unit settings

src/Vtk/vtkQViewport.cpp

@@ -20,17 +20,25 @@ QViewport::QViewport(QWidget* parent)
     , m_VtkWidget(nullptr)
     , m_GridButton(nullptr)
     , m_ProjButton(nullptr)
+    , m_renderTimer(nullptr)
+    , m_renderPending(false)
 {
     // Build the layout – zero margins so VTK fills the entire widget
     auto* layout = new QVBoxLayout(this);
     layout->setContentsMargins(0, 0, 0, 0);
     layout->setSpacing(0);
-
+ 
     m_VtkWidget = new QVTKOpenGLNativeWidget(this);
     layout->addWidget(m_VtkWidget);
-
+ 
+    // Initialize render timer
+    m_renderTimer = new QTimer(this);
+    m_renderTimer->setSingleShot(true);
+    connect(m_renderTimer, &QTimer::timeout, this, &QViewport::doRender);
+ 
     // Grid Toggle Button
     m_GridButton = new QPushButton(m_VtkWidget);
+
     m_GridButton->setText("#");
     m_GridButton->setFixedSize(40, 40);
     m_GridButton->setToolTip("Toggle Grid");
@@ -112,9 +120,21 @@ void QViewport::SetupPipeline()
 
 void QViewport::Render()
 {
-    if (m_VtkWidget && m_VtkWidget->renderWindow())
-        m_VtkWidget->renderWindow()->Render();
+    if (!m_throttledRendering) {
+        doRender();
+        return;
+    }
+    if (m_renderPending) return;
+    m_renderPending = true;
+    m_renderTimer->start(16);
 }
+ 
+ void QViewport::doRender()
+ {
+     m_renderPending = false;
+     if (m_VtkWidget && m_VtkWidget->renderWindow())
+         m_VtkWidget->renderWindow()->Render();
+ }
 
 vtkRenderWindow* QViewport::GetRenderWindow()
 {

src/Vtk/vtkQViewport.h

@@ -4,6 +4,7 @@
 #include <QWidget>
 #include <QVTKOpenGLNativeWidget.h>
 #include <QPushButton>
+#include <QTimer>
 
 #include <vtkCornerAnnotation.h>
 #include <vtkOrientationMarkerWidget.h>
@@ -39,27 +40,35 @@ public:
     // Render scene
     virtual void Render() override;
 
+    void SetThrottledRendering(bool enabled) { m_throttledRendering = enabled; }
+    bool GetThrottledRendering() const { return m_throttledRendering; }
+
     // Direct access to VTK internals
     virtual vtkRenderWindow*            GetRenderWindow() override;
     virtual vtkRenderWindowInteractor*  GetInteractor() override;
     QVTKOpenGLNativeWidget*     GetWidget()      { return m_VtkWidget; }
 
     virtual void OnSelectionChanged(Prop3D* p) override;
+ 
+ protected:
+     virtual void resizeEvent(QResizeEvent* event) override;
+ 
+ private slots:
+     void onGridButtonClicked();
+     void onProjButtonClicked();
+     void doRender();
+ 
+ private:
+     void SetupPipeline();
+ 
+     QVTKOpenGLNativeWidget*             m_VtkWidget;
+     QPushButton*                        m_GridButton;
+     QPushButton*                        m_ProjButton;
+     QTimer*                             m_renderTimer;
+     bool                                m_renderPending = false;
+     bool                                m_throttledRendering = true;
+ };
 
-protected:
-    virtual void resizeEvent(QResizeEvent* event) override;
-
-private slots:
-    void onGridButtonClicked();
-    void onProjButtonClicked();
-
-private:
-    void SetupPipeline();
-
-    QVTKOpenGLNativeWidget*             m_VtkWidget;
-    QPushButton*                        m_GridButton;
-    QPushButton*                        m_ProjButton;
-};
 
 } // namespace Vtk
 } // namespace uLib