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50
51#ifndef HOVERPOINTS_H
52#define HOVERPOINTS_H
53
54#include <QtWidgets>
55
56QT_FORWARD_DECLARE_CLASS(QBypassWidget)
57
58class HoverPoints : public QObject
59{
60 Q_OBJECT
61public:
62 enum PointShape {
63 CircleShape,
64 RectangleShape
65 };
66
67 enum LockType {
68 LockToLeft = 0x01,
69 LockToRight = 0x02,
70 LockToTop = 0x04,
71 LockToBottom = 0x08
72 };
73
74 enum SortType {
75 NoSort,
76 XSort,
77 YSort
78 };
79
80 enum ConnectionType {
81 NoConnection,
82 LineConnection,
83 CurveConnection
84 };
85
86 HoverPoints(QWidget *widget, PointShape shape);
87
88 bool eventFilter(QObject *object, QEvent *event) override;
89
90 void paintPoints();
91
92 inline QRectF boundingRect() const;
93 void setBoundingRect(const QRectF &boundingRect) { m_bounds = boundingRect; }
94
95 QPolygonF points() const { return m_points; }
96 void setPoints(const QPolygonF &points);
97
98 QSizeF pointSize() const { return m_pointSize; }
99 void setPointSize(const QSizeF &size) { m_pointSize = size; }
100
101 SortType sortType() const { return m_sortType; }
102 void setSortType(SortType sortType) { m_sortType = sortType; }
103
104 ConnectionType connectionType() const { return m_connectionType; }
105 void setConnectionType(ConnectionType connectionType) { m_connectionType = connectionType; }
106
107 void setConnectionPen(const QPen &pen) { m_connectionPen = pen; }
108 void setShapePen(const QPen &pen) { m_pointPen = pen; }
109 void setShapeBrush(const QBrush &brush) { m_pointBrush = brush; }
110
111 void setPointLock(int pos, LockType lock) { m_locks[pos] = lock; }
112
113 void setEditable(bool editable) { m_editable = editable; }
114 bool editable() const { return m_editable; }
115
116public slots:
117 void setEnabled(bool enabled);
118 void setDisabled(bool disabled) { setEnabled(!disabled); }
119
120signals:
121 void pointsChanged(const QPolygonF &points);
122
123public:
124 void firePointChange();
125
126private:
127 inline QRectF pointBoundingRect(int i) const;
128 void movePoint(int i, const QPointF &newPos, bool emitChange = true);
129
130 QWidget *m_widget;
131
132 QPolygonF m_points;
133 QRectF m_bounds;
134 PointShape m_shape;
135 SortType m_sortType;
136 ConnectionType m_connectionType;
137
138 QVector<uint> m_locks;
139
140 QSizeF m_pointSize;
141 int m_currentIndex;
142 bool m_editable;
143 bool m_enabled;
144
145 QHash<int, int> m_fingerPointMapping;
146
147 QPen m_pointPen;
148 QBrush m_pointBrush;
149 QPen m_connectionPen;
150};
151
152
153inline QRectF HoverPoints::pointBoundingRect(int i) const
154{
155 QPointF p = m_points.at(i);
156 qreal w = m_pointSize.width();
157 qreal h = m_pointSize.height();
158 qreal x = p.x() - w / 2;
159 qreal y = p.y() - h / 2;
160 return QRectF(x, y, w, h);
161}
162
163inline QRectF HoverPoints::boundingRect() const
164{
165 if (m_bounds.isEmpty())
166 return m_widget->rect();
167 else
168 return m_bounds;
169}
170
171#endif // HOVERPOINTS_H
172

source code of qtbase/examples/widgets/painting/shared/hoverpoints.h