D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/src/vlGraphics/UIEventListener.hpp

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#ifndef EventListener_INCLUDE_ONCE
#define EventListener_INCLUDE_ONCE

#include <vlGraphics/link_config.hpp>
#include <vlCore/String.hpp>

namespace vl
{
  class OpenGLContext;
  //-----------------------------------------------------------------------------
  // UIEventListener
  //-----------------------------------------------------------------------------
  class VLGRAPHICS_EXPORT UIEventListener: public Object
  {
  friend class OpenGLContext;
  public:
    virtual const char* className() { return "vl::UIEventListener"; }

    UIEventListener(): mOpenGLContext(NULL), mEnabled(true) 
    {
      VL_DEBUG_SET_OBJECT_NAME()
    }

    virtual void initEvent() = 0;

    virtual void destroyEvent() = 0;

    virtual void updateEvent() = 0;
    
    virtual void enableEvent(bool enabled) = 0;

    virtual void addedListenerEvent(OpenGLContext*) = 0;

    virtual void removedListenerEvent(OpenGLContext*) = 0;

    virtual void mouseMoveEvent(int x, int y) = 0;

    virtual void mouseUpEvent(EMouseButton button, int x, int y) = 0;

    virtual void mouseDownEvent(EMouseButton button, int x, int y) = 0;

    virtual void mouseWheelEvent(int n) = 0;

    virtual void keyPressEvent(unsigned short unicode_ch, EKey key) = 0;

    virtual void keyReleaseEvent(unsigned short unicode_ch, EKey key) = 0;

    virtual void resizeEvent(int x, int y) = 0;

    virtual void fileDroppedEvent(const std::vector<String>& files) = 0;

    virtual void visibilityEvent(bool visible) = 0;

    virtual void setEnabled(bool enabled) { if (mEnabled != enabled) { mEnabled = enabled; enableEvent(enabled); } }

    bool isEnabled() const { return mEnabled; }

    OpenGLContext* openglContext();

    const OpenGLContext* openglContext() const;

  private:
    OpenGLContext* mOpenGLContext;
    bool mEnabled;
  };
}

#endif