cxTransferFunctionColorWidget.h

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/*=========================================================================
This file is part of CustusX, an Image Guided Therapy Application.

Copyright (c) 2008-2014, SINTEF Department of Medical Technology
All rights reserved.

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modification, are permitted provided that the following conditions are met:

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   this list of conditions and the following disclaimer.

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   and/or other materials provided with the distribution.

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   may be used to endorse or promote products derived from this software 
   without specific prior written permission.

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#ifndef CXTRANSFERFUNCTIONCOLORWIDGET_H_
#define CXTRANSFERFUNCTIONCOLORWIDGET_H_

#include "cxGuiExport.h"

#include "cxBaseWidget.h"

#include "cxImage.h"
#include "cxForwardDeclarations.h"
#include "cxActiveImageProxy.h"

class QRect;
class QMenu;

namespace cx
{
class cxGui_EXPORT TransferFunctionColorWidget : public BaseWidget
{
  Q_OBJECT
  
public:
  TransferFunctionColorWidget(ActiveDataPtr activeData, QWidget* parent);
  virtual ~TransferFunctionColorWidget();
  
  void setData(ImagePtr image, ImageTFDataPtr tfData);

public slots:
  void activeImageTransferFunctionsChangedSlot(); 
  
protected slots:
  void removeColorSlot();
  void setColorSlot();
  void setColorSlotDelayed();

protected:
  struct ColorPoint
  {
          int intensity;
          QColor value;
          ColorPoint() : intensity(-1000000), value(255, 255, 255) {}
          void reset()
          {
                  intensity = -1000000;
                  value = QColor(255, 255, 255);
          }
          bool isValid()
          {
                  if(intensity != -1000000)
                          return true;
                  return false;
          }
  }; 
  
  QAction* mCustomColorAction;
  QAction* mRemoveColorAction;
      
  QRect mFullArea;
  QRect mPlotArea;
  int mBorder;

  std::map<int, QRect> mPointRects;
  ColorPoint mSelectedPoint;
//  int mCurrentClickX, mCurrentClickY;///< The x coordinate currently selected with the mouse
  QPoint mCurrentClickPos;

  ColorPoint selectPoint(QPoint pos) const;
  std::pair<int,int> findAllowedMoveRangeAroundColorPoint(int selectedPointIntensity);
  void paintColorPointsAndGenerateCache(QPainter& painter);
  void paintColorBar(QPainter& painter);
  void updateTooltip(QPoint pos);
  void updateTooltip(ColorPoint point);

  ImagePtr mImage;
  ImageTFDataPtr mImageTF;
  ActiveImageProxyPtr mActiveImageProxy;
  
  bool isEndpoint(int intensity) const;
//  bool isInsideCurrentPoint();///< Checks if a screen coordinate is inside any of the point rectangles. Sets mCurrentPoint.position and mCurrentPoint.value
  void contextMenuEvent(QContextMenuEvent *event);
  
    
  QPoint getPlotPoint(int iScalar);
  ColorPoint getCurrentColorPoint();
  ColorPoint getCurrentColorPoint(int clickX);
//  void moveCurrentPoint();///< Move the currently selected point to the selected screen coordinate (mCurrentClickX)
  void moveSelectedPointTo(ColorPoint newPoint);

  virtual void enterEvent(QEvent* event);
  virtual void leaveEvent(QEvent* event);
  virtual void mousePressEvent(QMouseEvent* event); 
  virtual void mouseReleaseEvent(QMouseEvent* event); 
  virtual void mouseMoveEvent(QMouseEvent* event);  
  virtual void keyPressEvent(QKeyEvent* event);
  virtual void resizeEvent(QResizeEvent* evt);
  virtual void paintEvent(QPaintEvent* event); 
  
  virtual QSize sizeHint () const { return QSize(100, 30);};

  int screenX2imageIntensity(int screenX);
  int imageIntensity2screenX(int intensity);
};

}
#endif /* CXTRANSFERFUNCTIONCOLORWIDGET_H_ */