WSimulationCanvas.h

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#pragma once
 
#include <Wt/WContainerWidget.h>
 
#include <memory>
 
#include <GraphicsObject/Framebuffer.h>
#include <GraphicsObject/Texture.h>
 
#include <ImWidgets/ImWindow.h>
#include <RenderWindow.h>
 
namespace dyno
{
    class Camera;
    class SceneGraph;
    class GLRenderEngine;
 
    struct RenderParams;
};
 
struct GLFWwindow;
class ImageEncoder;
class ImGuiBackendWt;
 
class WSimulationCanvas 
    : public Wt::WContainerWidget
    , public dyno::RenderWindow
{
public:
    WSimulationCanvas();
    ~WSimulationCanvas();
 
    void setScene(std::shared_ptr<dyno::SceneGraph> scene);
 
    void update();
 
public:
    //Mouse interaction
    void onMousePressed(const Wt::WMouseEvent& evt);
    void onMouseDrag(const Wt::WMouseEvent& evt);
    void onMouseReleased(const Wt::WMouseEvent& evt);
    void onMouseWheeled(const Wt::WMouseEvent& evt);
 
    //Keyboard interaction
    void onKeyWentDown(const Wt::WKeyEvent& evt);
    void onKeyWentUp(const Wt::WKeyEvent& evt);
 
protected:
    void initializeGL();
    void makeCurrent();
    void doneCurrent();
 
    void render(Wt::WFlags<Wt::RenderFlag> flags) override;
    void layoutSizeChanged(int width, int height) override;
 
    int width = 800;
    int height = 600;
 
private:
    Wt::WImage* mImage;
    Wt::WApplication* mApp;
 
    GLFWwindow* mContext;
    ImGuiBackendWt* mImGuiCtx;
 
    dyno::ImWindow mImWindow;
 
    std::vector<unsigned char> mImageData;                    // raw image    
    std::vector<unsigned char> mJpegBuffer;                  // jpeg data    
    std::unique_ptr<ImageEncoder> mJpegEncoder;             // jpeg encoder 
    std::unique_ptr<Wt::WMemoryResource> mJpegResource;        // Wt resource for jpeg image
 
    std::shared_ptr<dyno::SceneGraph> mScene = nullptr;
    //std::shared_ptr<dyno::Camera>   mCamera;
 
    // internal framebuffer
    dyno::Framebuffer mFramebuffer;
    dyno::Texture2D  mFrameColor;
 
    bool mMouseButtonDown = false;
 
    int mtempCursorX = -1;
};