#ifndef ULIB_VTK_QVIEWPORT_H
#define ULIB_VTK_QVIEWPORT_H

#include <QWidget>
#include <QVTKOpenGLNativeWidget.h>
#include <QPushButton>
#include <QTimer>

#include <vtkCornerAnnotation.h>
#include <vtkOrientationMarkerWidget.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkSmartPointer.h>

#include "uLibVtkInterface.h"

#include "vtkViewport.h"

class vtkProp;
class vtk3DWidget;
class vtkRenderWindowInteractor;
class vtkCameraOrientationWidget;

namespace uLib {
namespace Vtk {

/**
 * QViewport is a self-contained Qt widget that embeds a VTK renderer
 * directly into the Qt application (no separate VTK window).
 * Prop3Ds and actors are added to the embedded renderer.
 */
class QViewport : public QWidget, public Viewport {
    Q_OBJECT
signals:
    void prop3dSelected(uLib::Vtk::Prop3D* p);
public:
    explicit QViewport(QWidget* parent = nullptr);
    virtual ~QViewport();

    // 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;
 };


} // namespace Vtk
} // namespace uLib

#endif // ULIB_VTK_QVIEWPORT_H