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arrow.hh
1 /*===========================================================================*\
2 * *
3 * OpenFlipper *
4 * Copyright (c) 2001-2015, RWTH-Aachen University *
5 * Department of Computer Graphics and Multimedia *
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7 * www.openflipper.org *
8 * *
9 *---------------------------------------------------------------------------*
10 * This file is part of OpenFlipper. *
11 *---------------------------------------------------------------------------*
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13 * Redistribution and use in source and binary forms, with or without *
14 * modification, are permitted provided that the following conditions *
15 * are met: *
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18 * this list of conditions and the following disclaimer. *
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20 * 2. Redistributions in binary form must reproduce the above copyright *
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25 * contributors may be used to endorse or promote products derived from *
26 * this software without specific prior written permission. *
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28 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS *
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39 * *
40 \*===========================================================================*/
41
42 /*===========================================================================*\
43 * *
44 * $Revision$ *
45 * $LastChangedBy$ *
46 * $Date$ *
47 * *
48 \*===========================================================================*/
49
50 #ifndef VSI_ARROW_HH
51 #define VSI_ARROW_HH
52
53 //== INCLUDES =================================================================
54 #include <QGraphicsWidget>
55 #include <QGraphicsPathItem>
56 #include <QString>
57 #include <QTimer>
58
59 //== NAMESPACES ===============================================================
60 namespace VSI {
61
62 //== FORWARDDECLARATIONS ======================================================
63 class GraphicsScene;
64
65 //== CLASS DEFINITION =========================================================
66
68 class Arrow : public QObject, public QGraphicsPixmapItem, public QGraphicsLayoutItem
69 {
70 Q_OBJECT
71 Q_INTERFACES(QGraphicsLayoutItem)
72
73 public:
74
76 enum Direction
77 {
78 North,
79 South,
80 East,
81 West,
82 Center
83 };
84
85 public:
86
88 Arrow (GraphicsScene *_scene, QGraphicsItem *_parent, Direction _dir);
89
91 ~Arrow ();
92
94 void activate ();
95
97 void reset ();
98
100 void setHighlight (bool _highlight);
101
103 virtual void setGeometry (const QRectF &_rect);
104
105 protected:
106
107 // catch mouse hover events
108 virtual void hoverEnterEvent (QGraphicsSceneHoverEvent *_event);
109 virtual void hoverLeaveEvent (QGraphicsSceneHoverEvent *_event);
110
111 // catch mouse press/release events
112 virtual void mousePressEvent (QGraphicsSceneMouseEvent *_event);
113 virtual void mouseReleaseEvent (QGraphicsSceneMouseEvent *_event);
114
115 // catch mouse wheel events
116 virtual void wheelEvent (QGraphicsSceneWheelEvent *_event);
117
118 // size information for layouting
119 virtual QSizeF sizeHint ( Qt::SizeHint _which, const QSizeF & _constraint = QSizeF()) const;
120
121 private slots:
122 void timeout ();
123
124 private:
125 GraphicsScene *scene_;
126
127 Direction dir_;
128
129 QTimer timer_;
130
131 int interval_;
132
133 bool moveSelected_;
134
135 bool highlight_;
136 };
137
138 //=============================================================================
139 }
140 //=============================================================================
141
142 #endif
VSI
Definition: baseWidget.cc:78
VSI::Arrow::Arrow
Arrow(GraphicsScene *_scene, QGraphicsItem *_parent, Direction _dir)
Constructor.
Definition: arrow.cc:72
VSI::Arrow::reset
void reset()
Stop the timer.
Definition: arrow.cc:256
VSI::Arrow
Scene movement widget.
Definition: arrow.hh:68
VSI::Arrow::setGeometry
virtual void setGeometry(const QRectF &_rect)
Sets the geometry.
Definition: arrow.cc:265
VSI::GraphicsScene
Definition: graphicsScene.hh:86
VSI::Arrow::Direction
Direction
Movement direction.
Definition: arrow.hh:76
VSI::Arrow::~Arrow
~Arrow()
Destructor.
Definition: arrow.cc:108
VSI::Arrow::activate
void activate()
Activates the timer for movement (will be called if an element is moved above)
Definition: arrow.cc:245
VSI::Arrow::setHighlight
void setHighlight(bool _highlight)
Highlights the widget if the scene can be moved in this direction.
Definition: arrow.cc:293