git.sesse.net Git - kdenlive/blob - src/graphicsscenerectmove.cpp

   1 #include "graphicsscenerectmove.h"
   2 #include <KDebug>
   3 #include <QGraphicsSceneMouseEvent>
   4 #include <QGraphicsRectItem>
   5 #include <QGraphicsView>
   6 #include <QCursor>
   7
   8 QGraphicsItem* selected=NULL;
   9 int button=0;
  10 int resizeMode=-1;
  11 enum resizeMode {NoResize,TopLeft,BottomLeft,TopRight,BottomRight,Left,Right,Up,Down};
  12 GraphicsSceneRectMove::GraphicsSceneRectMove(QObject *parent):QGraphicsScene(parent){
  13         //grabMouse();
  14         zoom=1.0;
  15 }
  16
  17 void GraphicsSceneRectMove::mouseMoveEvent(QGraphicsSceneMouseEvent* e){
  18
  19         if (selected && selected->type()==3 && e->buttons() & Qt::LeftButton){
  20
  21                 QGraphicsRectItem *gi=(QGraphicsRectItem*)selected;
  22                 QRectF newrect=gi->rect();
  23                 QPointF newpoint=e->scenePos();
  24                 newpoint-=selected->scenePos();
  25                 switch (resizeMode){
  26                 case TopLeft:
  27                         newrect.setTopLeft(newpoint);
  28                         break;
  29                 case BottomLeft:
  30                         newrect.setBottomLeft(newpoint);
  31                         break;
  32                 case TopRight:
  33                         newrect.setTopRight(newpoint);
  34                         break;
  35                 case BottomRight:
  36                         newrect.setBottomRight(newpoint);
  37                         break;
  38                 case Left:
  39                         newrect.setLeft(newpoint.x());
  40                         break;
  41                 case Right:
  42                         newrect.setRight(newpoint.x());
  43                         break;
  44                 case Up:
  45                         newrect.setTop(newpoint.y());
  46                         break;
  47                 case Down:
  48                         newrect.setBottom(newpoint.y());
  49                         break;
  50                 }
  51
  52                 gi->setRect(newrect);
  53                 gi->setPos(selected->scenePos());
  54         }
  55
  56         QPointF p=e->scenePos();
  57         p+=QPoint(-2,-2);
  58         resizeMode=NoResize;
  59         selected=NULL;
  60         foreach(QGraphicsItem* g, items( QRectF( p , QSizeF(4,4) ).toRect() ) ){
  61
  62                 if (g->type()==3 ){
  63
  64                         QGraphicsRectItem *gi=(QGraphicsRectItem*)g;
  65                         QRectF r=gi->rect();
  66                         r.translate(gi->scenePos());
  67
  68                         if ( (r.toRect().topLeft()-=e->scenePos().toPoint() ).manhattanLength()<3 ){
  69                                 resizeMode=TopLeft;
  70                         }else if ((r.toRect().bottomLeft()-=e->scenePos().toPoint() ).manhattanLength()<3 ){
  71                                 resizeMode=BottomLeft;
  72                         }else if ((r.toRect().topRight()-=e->scenePos().toPoint() ).manhattanLength()<3 ){
  73                                 resizeMode=TopRight;
  74                         }else if ((r.toRect().bottomRight()-=e->scenePos().toPoint() ).manhattanLength()<3 ){
  75                                 resizeMode=BottomRight;
  76                         }else if ( qAbs(r.toRect().left()-e->scenePos().toPoint().x() ) <3){
  77                                 resizeMode=Left;
  78                         }else if ( qAbs(r.toRect().right()-e->scenePos().toPoint().x() ) <3){
  79                                 resizeMode=Right;
  80                         }else if ( qAbs(r.toRect().top()-e->scenePos().toPoint().y() ) <3){
  81                                 resizeMode=Up;
  82                         }else if ( qAbs(r.toRect().bottom()-e->scenePos().toPoint().y() ) <3){
  83                                 resizeMode=Down;
  84                         }
  85                         if (resizeMode!=NoResize)
  86                                 selected=gi;
  87                 }
  88                 break;
  89         }
  90         switch (resizeMode){
  91                 case TopLeft:
  92                 case BottomRight:
  93                         setCursor(QCursor(Qt::SizeFDiagCursor));
  94                         break;
  95                 case BottomLeft:
  96                 case TopRight:
  97                         setCursor(QCursor(Qt::SizeBDiagCursor));
  98                         break;
  99                 case Left:
 100                 case Right:
 101                         setCursor(Qt::SizeHorCursor);
 102                         break;
 103                 case Up:
 104                 case Down:
 105                         setCursor(Qt::SizeVerCursor);
 106                         break;
 107                 default:
 108                         setCursor(QCursor(Qt::ArrowCursor));
 109                         QGraphicsScene::mouseMoveEvent(e);
 110         }
 111
 112
 113 }
 114
 115 void GraphicsSceneRectMove::wheelEvent ( QGraphicsSceneWheelEvent * wheelEvent ){
 116         QList<QGraphicsView*> viewlist=views();
 117         kDebug() << wheelEvent->delta() << " " << zoom;
 118         if (viewlist.size()>0){
 119                 if (wheelEvent->delta()<0 && zoom<20.0){
 120                         zoom*=1.1;
 121
 122                 }else if (wheelEvent->delta()>0 && zoom>.05){
 123                         zoom/=1.1;
 124                 }
 125
 126                 viewlist[0]->resetTransform();
 127                 viewlist[0]->scale(zoom,zoom);
 128         }
 129 }
 130
 131 void GraphicsSceneRectMove::setCursor(QCursor c){
 132         QList<QGraphicsView*> l=views();
 133         foreach(QGraphicsView* v, l){
 134                 v->setCursor(c);
 135         }
 136 }