QtWheel.hh

/*===========================================================================*\
 *                                                                           *
 *                              OpenFlipper                                  *
 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
 *           Department of Computer Graphics and Multimedia                  *
 *                          All rights reserved.                             *
 *                            www.openflipper.org                            *
 *                                                                           *
 *---------------------------------------------------------------------------*
 * This file is part of OpenFlipper.                                         *
 *---------------------------------------------------------------------------*
 *                                                                           *
 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
 *                                                                           *
 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
 *                                                                           *
 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
 *                                                                           *
 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
 *                                                                           *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
 *                                                                           *
\*===========================================================================*/

/*===========================================================================*\
 *                                                                           *
 *   $Revision$                                                       *
 *   $Author$                                                      *
 *   $Date$                   *
 *                                                                           *
\*===========================================================================*/



//=============================================================================
//
//  CLASS QWheel
//
//=============================================================================

#ifndef ACG_QT_WHEEL_HH
#define ACG_QT_WHEEL_HH


//== INCLUDES =================================================================

#include <QPalette>
#include <QFrame>
#include <QMouseEvent>
#include <QPixmap>
#include <QKeyEvent>
#include <QResizeEvent>
#include <QPaintEvent>

#include "../Config/ACGDefines.hh"


//== FORWARDDECLARATIONS ======================================================

class QPaintEvent;
class QMouseEvent;
class QPainter;


//== NAMESPACES ===============================================================


namespace ACG {
namespace QtWidgets {


//== CLASS DEFINITION =========================================================


class ACGDLLEXPORT QtWheel : public QFrame
{
  Q_OBJECT
public:

  enum Orientation { Horizontal, Vertical };

  //
  // CONSTRUCTORS
  //

  QtWheel(QWidget* _parent=0,
         const char* _name=0,
         Orientation _orientation = Horizontal);

  virtual ~QtWheel();


  //
  // METHODS
  //

  int ticks() const { return ticks_; }
  void setTicks(int _number) {
    ticks_=_number; redrawPixmap(); repaint();
  }

  double angle() const { return angle_; }
  void setAngle(double _angle) {
    angle_=_angle; lastAngle_=0.0; redrawPixmap(); repaint();
  }
  double diffAngle() const { return angle_-lastAngle_; }

  bool marker() const { return marker_; }
  void setMarker(bool _b) {
    marker_=_b; redrawPixmap(); repaint();
  }

  Orientation orientation() const;
  void setOrientation(Orientation _orientation) {
    orientation_=_orientation; redrawPixmap(); repaint();
  }

  bool draggingWheel() const { return dragging_; }

  void setTracking(bool _b) { tracking_=_b; }
  bool tracking() const { return tracking_; }

  void setGear(double _g) { gear_=_g; }
  double gear() const { return gear_; }

  virtual QSizePolicy sizePolicy() const;
  virtual QSize sizeHint() const;

  static double clip(double _angle);

  static double deg(double _angle);

signals:
  void angleChangedTo(double _angle);
  void angleChangedBy(double _angle);

  void gearUp();
  void gearDown();

  void hideWheel();

protected:
  virtual void mousePressEvent(QMouseEvent*);
  virtual void mouseReleaseEvent(QMouseEvent*);
  virtual void mouseMoveEvent(QMouseEvent*);
  virtual void mouseDoubleClickEvent(QMouseEvent*);
  virtual void keyPressEvent(QKeyEvent*);
  virtual void keyReleaseEvent(QKeyEvent*);

  virtual void resizeEvent(QResizeEvent*);
  virtual void paintEvent(QPaintEvent*);
  virtual void drawContents(QPainter*) {};


  virtual void redrawPixmap();

private slots:
  void slotCustomContextMenuRequested ( const QPoint & pos );

private:

  QtWheel(const QtWheel&);
  QtWheel& operator=(const QtWheel&);

  double turn(const QPoint& _pos);
  void updateMenu();                  
  void shrinkRect(QRect&, int, int);  

  double       angle_;                
  double       lastAngle_;            
  int          size_;                 

  double       gear_;                 
  int          gearShift_;            

  Orientation  orientation_;          

  int          ticks_;                
  bool         marker_;               

  QPoint       pos_;                  
  bool         dragging_;             
  bool         tracking_;             

  QPalette     palette_;              
  QPixmap      pixmap_;               
};

//=============================================================================
} // namespace QtWidgets
} // namespace ACG
//=============================================================================
#endif // ACG_QWHEEL_HH defined
//=============================================================================