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/*  Visualization Library                                                             */
/*  http://visualizationlibrary.org                                                   */
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/*  Copyright (c) 2005-2010, Michele Bosi                                             */
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#ifndef GhostCameraManipulator_INCLUDE_ONCE
#define GhostCameraManipulator_INCLUDE_ONCE

#include <vlGraphics/OpenGLContext.hpp>

namespace vl
{
  class Camera;
  //------------------------------------------------------------------------------
  // GhostCameraManipulator
  //------------------------------------------------------------------------------
  class VLGRAPHICS_EXPORT GhostCameraManipulator: public UIEventListener
  {
    VL_INSTRUMENT_CLASS(vl::GhostCameraManipulator, UIEventListener)

  public:
    GhostCameraManipulator();

    // ---  UIEventListener ---

    virtual void mouseMoveEvent(int x, int y);

    void enableEvent(bool enabled);

    virtual void updateEvent();

    virtual void initEvent() {}

    virtual void destroyEvent() {}

    virtual void addedListenerEvent(OpenGLContext*) {}

    virtual void removedListenerEvent(OpenGLContext*) {}

    virtual void mouseUpEvent(EMouseButton, int, int) {}

    virtual void mouseDownEvent(EMouseButton, int, int) {}

    virtual void mouseWheelEvent(int) {}

    virtual void keyPressEvent(unsigned short, EKey) {}

    virtual void keyReleaseEvent(unsigned short, EKey) {}

    virtual void resizeEvent(int, int) {}

    virtual void fileDroppedEvent(const std::vector<String>&) {}

    virtual void visibilityEvent(bool) {}

    // --- --- ---

    void setCamera(Camera* camera);

    Camera* camera();
    
    const Camera* camera() const;

    void setKeysForward(EKey key, EKey modifier = Key_None)  { mKeysForward[0] = key; mKeysForward[1] = modifier; };
    
    void setKeysBackward(EKey key, EKey modifier = Key_None) { mKeysBackward[0] = key; mKeysBackward[1] = modifier; };
    
    void setKeysLeft(EKey key, EKey modifier = Key_None)     { mKeysLeft[0] = key; mKeysLeft[1] = modifier; };
    
    void setKeysRight(EKey key, EKey modifier = Key_None)    { mKeysRight[0] = key; mKeysRight[1] = modifier; };
    
    void setKeysUp(EKey key, EKey modifier = Key_None)       { mKeysUp[0] = key; mKeysUp[1] = modifier; };
    
    void setKeysDown(EKey key, EKey modifier = Key_None)     { mKeysDown[0] = key; mKeysDown[1] = modifier; };

    void setRotationSpeed(real speed) { mRotationSpeed = speed; }
    
    real rotationSpeed() const { return mRotationSpeed; }
    
    void setMovementSpeed(real speed) { mMovementSpeed = speed; }

    real movementSpeed() const { return mMovementSpeed; }

  protected:
    void setPosition(vec3 position) { mPosition = position; }

    const vec3& position() const { return mPosition; }

    void setXDegrees(real degree) { mXDegrees = degree; }

    real xDegrees() { return mXDegrees; }

    void setYDegrees(real degree) { mYDegrees = degree; }

    real yDegrees() { return mYDegrees; }

  protected:
    ref<Camera> mCamera;
    vec3 mPosition;
    real mLastTime;
    real mRotationSpeed;
    real mMovementSpeed;
    real mXDegrees;
    real mYDegrees;
    EKey mKeysForward[2];
    EKey mKeysBackward[2];
    EKey mKeysUp[2];
    EKey mKeysDown[2];
    EKey mKeysLeft[2];
    EKey mKeysRight[2];
  };
}

#endif