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columnhandleitem.h
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20 
21 #ifndef COLUMNHANDLEITEM_H_
22 #define COLUMNHANDLEITEM_H_
23 
24 #include <QGraphicsItem>
25 #include <QGraphicsScene>
26 #include <QPropertyAnimation>
27 
28 #include "chatscene.h"
29 
30 class ColumnHandleItem : public QGraphicsObject
31 {
32  Q_OBJECT
33  Q_PROPERTY(qreal opacity READ opacity WRITE setOpacity)
34 
35 public :
36  ColumnHandleItem(qreal width, QGraphicsItem *parent = 0);
37  virtual inline int type() const { return ChatScene::ColumnHandleType; }
38 
39  inline qreal width() const { return _width; }
40  inline QRectF boundingRect() const { return _boundingRect; }
41  inline qreal sceneLeft() const { return _sceneLeft; }
42  inline qreal sceneRight() const { return _sceneRight; }
43 
44  inline qreal opacity() const { return _opacity; }
45 
46  void setXPos(qreal xpos);
47  void setXLimits(qreal min, qreal max);
48 
49  void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
50 
51 public slots:
52  void sceneRectChanged(const QRectF &);
53  void setOpacity(qreal opacity);
54 
55 protected:
56  void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
57  void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
58  void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
59  void mousePressEvent(QGraphicsSceneMouseEvent *event);
60  void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
61 
62 signals:
63  void positionChanged(qreal x);
64 
65 private:
66  qreal _width;
68  QRectF _boundingRect;
69  bool _moving;
70  qreal _offset;
72  qreal _opacity;
73  QPropertyAnimation *_animation;
74 };
75 
76 
77 #endif