Engauge Digitizer 2
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GraphicsPointPolygon.h
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1/******************************************************************************************************
2 * (C) 2014 markummitchell@github.com. This file is part of Engauge Digitizer, which is released *
3 * under GNU General Public License version 2 (GPLv2) or (at your option) any later version. See file *
4 * LICENSE or go to gnu.org/licenses for details. Distribution requires prior written permission. *
5 ******************************************************************************************************/
6
7#ifndef GRAPHICS_POINT_POLYGON_H
8#define GRAPHICS_POINT_POLYGON_H
9
10#include <QGraphicsPolygonItem>
11#include <QObject>
12#include <QPointF>
13
14class GraphicsPoint;
15
17class GraphicsPointPolygon : public QObject, public QGraphicsPolygonItem
18{
19 Q_OBJECT;
20
21public:
24 const QPolygonF &polygon);
25
27 QVariant itemChange(GraphicsItemChange change, const QVariant &value);
28
30 virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event);
31
33 virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event);
34
36 void setRadius(int radius);
37
39 void setShadow (GraphicsPointPolygon *shadow);
40
41signals:
42
44 void signalPointHoverEnter (QString);
45
47 void signalPointHoverLeave (QString);
48
49private:
51
52 void setOpacityForSubtree (double opacity);
53
54 // Reference to the GraphicsPoint that this class belongs to
55 GraphicsPoint &m_graphicsPoint;
56
57 GraphicsPointPolygon *m_shadow;
58};
59
60#endif // GRAPHICS_POINT_POLYGON_H
void setRadius(int radius)
Update the radius.
virtual void hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
Unhighlight this point.
virtual void hoverEnterEvent(QGraphicsSceneHoverEvent *event)
Accept hover so point can be highlighted when cursor is over it as a guide to user.
QVariant itemChange(GraphicsItemChange change, const QVariant &value)
Intercept moves by dragging so moved items can be identified. This replaces unreliable hit tests.
void signalPointHoverEnter(QString)
Signal for geometry window to highlight the current point upon hover enter.
GraphicsPointPolygon(GraphicsPoint &graphicsPoint, const QPolygonF &polygon)
Single constructor.
void signalPointHoverLeave(QString)
Signal for geometry window to unhighlight the current point upon hover leave.
void setShadow(GraphicsPointPolygon *shadow)
Bind this graphics item to its shadow.
Graphics item for drawing a circular or polygonal Point.