kineticview.h

   1 /***********************************************************************/
   2 /* kineticview.h                                                       */
   3 /*                                                                     */
   4 /* Copyright(C) 2009 Igor Trindade Oliveira <igor.oliveira@indt.org.br>*/
   5 /* Copyright(C) 2009 Adenilson Cavalcanti <adenilson.silva@idnt.org.br>*/
   6 /*                                                                     */
   7 /* This library is free software; you can redistribute it and/or       */
   8 /* modify it under the terms of the GNU Lesser General Public          */
   9 /* License as published by the Free Software Foundation; either        */
  10 /* version 2.1 of the License, or (at your option) any later version.  */
  11 /*                                                                     */
  12 /* This library is distributed in the hope that it will be useful,     */
  13 /* but WITHOUT ANY WARRANTY; without even the implied warranty of      */
  14 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   */
  15 /* Lesser General Public License for more details.                     */
  16 /*                                                                     */
  17 /* You should have received a copy of the GNU Lesser General Public    */
  18 /* License along with this library; if not, write to the Free Software */
  19 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA       */
  20 /* 02110-1301  USA                                                     */
  21 /***********************************************************************/
  22 #ifndef KINETICLAYOUT_H
  23 #define KINETICLAYOUT_H
  24
  25 #include <QGraphicsWidget>
  26 #include <QGraphicsSceneMouseEvent>
  27
  28 #include "kineticscroll.h"
  29
  30 class QGraphicsGridLayout;
  31 class ScrollBar;
  32
  33 class KineticView : public QGraphicsWidget, KineticScrolling
  34 {
  35     Q_OBJECT
  36
  37     public:
  38         KineticView( QGraphicsWidget *parent = 0 );
  39         ~KineticView();
  40
  41         void setWidget( QGraphicsWidget *item );
  42
  43     private:
  44         QGraphicsWidget * mWindow;
  45         QGraphicsWidget *mViewPort;
  46         QGraphicsGridLayout *layout;
  47         ScrollBar *verticalScrollbar;
  48         qreal mScrollVelocity;
  49         enum { NONE, UP, DOWN };
  50         int timerID, overshut, cposition, direction, minimalPos, maximumPos;
  51         char bounceFlag;
  52     protected:
  53         void resizeEvent( QGraphicsSceneResizeEvent *event );
  54
  55         void mousePressEvent( QGraphicsSceneMouseEvent *event );
  56         void mouseMoveEvent( QGraphicsSceneMouseEvent *event );
  57         void mouseReleaseEvent( QGraphicsSceneMouseEvent *event );
  58
  59         void timerEvent( QTimerEvent *event );
  60         void bounceTimer();
  61
  62     public Q_SLOTS:
  63         void setScrollValue( int value );
  64
  65     private:
  66         void startTimer(int interval);
  67         void adjustScrollBar();
  68 };
  69
  70 #endif