histogramInterface.h

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//==============================================
//  copyright            : (C) 2003-2005 by Will Stokes
//==============================================
//  This program is free software; you can redistribute it 
//  and/or modify it under the terms of the GNU General 
//  Public License as published by the Free Software 
//  Foundation; either version 2 of the License, or  
//  (at your option) any later version.         
//==============================================
 
#ifndef GUI_EDITING_HISTOGRAMINTERFACE_H
#define GUI_EDITING_HISTOGRAMINTERFACE_H
 
//--------------------
//forward declarations
//--------------------
 
#include <qwidget.h>
//Added by qt3to4:
#include <QResizeEvent>
#include <QMouseEvent>
#include <QPaintEvent>
 
typedef enum
{  
  LUMINOSITY,
  RED,
  GREEN,
  BLUE,
} DISPLAYED_CHANNEL;
 
typedef enum
{  
  DRAG,
  NO_EFFECT
} DRAG_MODE;
 
//=====================================
//=====================================
class HistogramInterface : public QWidget
{
Q_OBJECT
 
public:
  HistogramInterface( QString imageFilename,
                      QWidget *parent=0, 
                      const char* name=0);
                 
  ~HistogramInterface();
  
  void setDisplayChannel( DISPLAYED_CHANNEL channel );
 
  virtual QSize minimumSizeHint() const;
  
  void getHistBoundaries(int &lumLeft, int &lumRight,
                         int &redLeft, int &redRight,
                         int &greenLeft, int &greenRight,
                         int &blueLeft, int &blueRight);                         
  
  void resetBoundaries();
  //----------------------
protected:
  void paintEvent( QPaintEvent *e);
  void resizeEvent( QResizeEvent * );
  void mousePressEvent( QMouseEvent *e);
  void mouseReleaseEvent( QMouseEvent *);
  void mouseMoveEvent( QMouseEvent *e);
  //----------------------
signals:
  void selectedRangeChanged();
  //----------------------    
private slots:
  //selects entire range of current channel
  void selectAll();
  //----------------------
private:    
  void getSelectedRange( int &left, int &right );  
 
  double displayToIndex(int val);
  
  int indexToDisplay(int val);
  
  bool nearBoundary( QPoint p );  
  
  DISPLAYED_CHANNEL displayedChannel;  
 
  int redVals[256];
  int greenVals[256];
  int blueVals[256];
  int grayVals[256];
  
  int maxRcount, maxGcount, maxBcount, maxGRAYcount;
  
  int lumClick, lumDrag;
  int redClick, redDrag;
  int greenClick, greenDrag;
  int blueClick, blueDrag;
  
  QSize origImageSize;
  
  DRAG_MODE dragMode;  
  
  DRAG_MODE currentMouseShape;
//----------------------
};
//======================
 
#endif //GUI_EDITING_HISTOGRAMINTERFACE_H