selectionPlacementInterface.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_SELECTIONPLACEMENTINTERFACE_H
#define GUI_EDITING_SELECTIONPLACEMENTINTERFACE_H
 
//--------------------
//forward declarations
//--------------------
 
#include <qwidget.h>
#include <qimage.h>
#include <qpoint.h>
#include <qsize.h>
//Added by qt3to4:
#include <QPaintEvent>
#include <QMouseEvent>
 
//=====================================
//=====================================
class SelectionPlacementInterface : public QWidget
{
Q_OBJECT
 
public:
  SelectionPlacementInterface(QString imageFilename,
                              QWidget *parent=0, 
                              const char* name=0);
                 
  ~SelectionPlacementInterface();
  
  QRect getSelectedRegion();
 
  void setSelectedRegion(QRect selection);
  
  virtual QSize sizeHint() const;
  virtual QSize minimumSizeHint() const;
  //----------------------
protected:
  void paintEvent( QPaintEvent *e);
  void mousePressEvent( QMouseEvent *e);
  void mouseReleaseEvent( QMouseEvent *);
  void mouseMoveEvent( QMouseEvent *e);
  //----------------------
private:
  QRect imageToDisplay( QRect r );
 
  bool overRegion( QPoint p );
  
  void recenterSelection(QPoint mousePosition);
  
  QImage scaledImage;
   
  QImage unselectedScaledImage;
  
  QSize origImageSize;  
 
  QRect selection;
 
  bool currentlyDragging;
 
  bool currentMouseShapeIsDrag;
  //----------------------
signals:
  //emitted as the user drags the selection around
  void placementChanged( QRect );  
  //----------------------
};
//======================
 
#endif //GUI_EDITING_SELECTIONPLACEMENTINTERFACE_H