selectionInterface.h

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//Added by qt3to4:
#include <QResizeEvent>
#include <QMouseEvent>
#include <QKeyEvent>
#include <QPaintEvent>
//==============================================
//  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_SELECTIONINTERFACE_H
#define GUI_EDITING_SELECTIONINTERFACE_H
 
typedef enum
{  
  DRAW_SELECTION,
  MOVE_SELECTION,
  MOVE_TOP_LEFT_CORNER,
  MOVE_TOP_RIGHT_CORNER,
  MOVE_BOTTOM_LEFT_CORNER,
  MOVE_BOTTOM_RIGHT_CORNER,
  MOVE_LEFT_SIDE,
  MOVE_RIGHT_SIDE,
  MOVE_TOP_SIDE,
  MOVE_BOTTOM_SIDE,
  SCALE_SELECTION,
  DRAW_LINE,
  NO_EFFECT
} DRAG_MODE;
 
//--------------------
//forward declarations
class QPoint;
//--------------------
 
#include <qwidget.h>
#include <qimage.h>
 
//=====================================
//=====================================
class SelectionInterface : public QWidget
{
Q_OBJECT
 
public:
  SelectionInterface(QWidget *parent=0, 
                            const char* name=0);
                 
  ~SelectionInterface();
  
  void setPhoto(QString imageFilename, bool resetSelection=true);
  
  void getSelection(QPoint &topLeft, QPoint &bottomRight);
 
  void setSelection(QPoint topLeft, QPoint bottomRight, double cropMaxDimen=-1.0);
  
  bool selectionEmpty();
  
  void getDisplaySize(int &width, int &height);
  
  void enterDrawLineMode();  
  //----------------------
signals:
  void ctrlClick();
    
  void selectionChanged();
  
  void aspectRatioChanged();
  
  void lineSelected( QPoint p1, QPoint p2 ); 
  //----------------------
protected:
  QSize sizeHint();    
  void paintEvent( QPaintEvent *e);
  void mousePressEvent( QMouseEvent *e);
  void mouseReleaseEvent( QMouseEvent *);
  void mouseMoveEvent( QMouseEvent *e);
  void resizeEvent( QResizeEvent * );
  void keyPressEvent(QKeyEvent *e);
  void keyReleaseEvent(QKeyEvent *e);
  //----------------------
public slots:
  void selectNone();
 
  void selectAll();
  //----------------------
private:
  DRAG_MODE mouseActionByPosition(QPoint p);
    
  QPoint cropSelectedPoint(QPoint p);
 
  QPoint ConvertDisplayToImageCoordinate( QPoint p );
  
  QPoint ConvertImageToDisplayCoordinate( QPoint p );
  
  void constructDisplayImages();
  
  void updateCursorShape( QPoint p );
  
  bool scaleSelection( int delta );
  
  QImage fullScreenImage;
    
  QImage scaledImage;
  
  QImage unselectedScaledImage;
  
  QPoint mousePressPoint;
  
  QPoint mouseDragPoint;
  
  QPoint cachedMousePosition;
  
  DRAG_MODE currentDragMode;
 
  DRAG_MODE currentMouseShape;
  
  QString origImageFilename;
  
  QSize origImageSize;  
    
  bool SHIFT_Pressed;
  
  bool CTRL_Pressed;
  
  QPoint cachedSelctionCenter;
  QSize cachedSelectionSize;
  
  double cropMaxDimen;
//----------------------
};
//======================
 
#endif //GUI_EDITING_SELECTIONINTERFACE_H