1 /****************************************************************************
2 **
3 ** Copyright (C) 2015 The Qt Company Ltd.
4 ** Contact: http://www.qt.io/licensing/
5 **
6 ** This file is part of the QtDeclarative module of the Qt Toolkit.
7 **
8 ** $QT_BEGIN_LICENSE:LGPL$
9 ** Commercial License Usage
10 ** Licensees holding valid commercial Qt licenses may use this file in
11 ** accordance with the commercial license agreement provided with the
12 ** Software or, alternatively, in accordance with the terms contained in
13 ** a written agreement between you and The Qt Company. For licensing terms
14 ** and conditions see http://www.qt.io/terms-conditions. For further
15 ** information use the contact form at http://www.qt.io/contact-us.
16 **
17 ** GNU Lesser General Public License Usage
18 ** Alternatively, this file may be used under the terms of the GNU Lesser
19 ** General Public License version 2.1 or version 3 as published by the Free
20 ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
21 ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
22 ** following information to ensure the GNU Lesser General Public License
23 ** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
24 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
25 **
26 ** As a special exception, The Qt Company gives you certain additional
27 ** rights. These rights are described in The Qt Company LGPL Exception
28 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
29 **
30 ** GNU General Public License Usage
31 ** Alternatively, this file may be used under the terms of the GNU
32 ** General Public License version 3.0 as published by the Free Software
33 ** Foundation and appearing in the file LICENSE.GPL included in the
34 ** packaging of this file. Please review the following information to
35 ** ensure the GNU General Public License version 3.0 requirements will be
36 ** met: http://www.gnu.org/copyleft/gpl.html.
37 **
38 ** $QT_END_LICENSE$
39 **
40 ****************************************************************************/
41
42 #ifndef QDECLARATIVEPINCHAREA_H
43 #define QDECLARATIVEPINCHAREA_H
44
45 #include <qdeclarativeitem.h>
46
47 QT_BEGIN_HEADER
48
49 QT_BEGIN_NAMESPACE
50
QT_MODULE(Declarative)51 QT_MODULE(Declarative)
52
53 class Q_AUTOTEST_EXPORT QDeclarativePinch : public QObject
54 {
55 Q_OBJECT
56
57 Q_ENUMS(Axis)
58 Q_PROPERTY(QGraphicsObject *target READ target WRITE setTarget RESET resetTarget)
59 Q_PROPERTY(qreal minimumScale READ minimumScale WRITE setMinimumScale NOTIFY minimumScaleChanged)
60 Q_PROPERTY(qreal maximumScale READ maximumScale WRITE setMaximumScale NOTIFY maximumScaleChanged)
61 Q_PROPERTY(qreal minimumRotation READ minimumRotation WRITE setMinimumRotation NOTIFY minimumRotationChanged)
62 Q_PROPERTY(qreal maximumRotation READ maximumRotation WRITE setMaximumRotation NOTIFY maximumRotationChanged)
63 Q_PROPERTY(Axis dragAxis READ axis WRITE setAxis NOTIFY dragAxisChanged)
64 Q_PROPERTY(qreal minimumX READ xmin WRITE setXmin NOTIFY minimumXChanged)
65 Q_PROPERTY(qreal maximumX READ xmax WRITE setXmax NOTIFY maximumXChanged)
66 Q_PROPERTY(qreal minimumY READ ymin WRITE setYmin NOTIFY minimumYChanged)
67 Q_PROPERTY(qreal maximumY READ ymax WRITE setYmax NOTIFY maximumYChanged)
68 Q_PROPERTY(bool active READ active NOTIFY activeChanged)
69
70 public:
71 QDeclarativePinch();
72
73 QGraphicsObject *target() const { return m_target; }
74 void setTarget(QGraphicsObject *target) {
75 if (target == m_target)
76 return;
77 m_target = target;
78 emit targetChanged();
79 }
80 void resetTarget() {
81 if (!m_target)
82 return;
83 m_target = 0;
84 emit targetChanged();
85 }
86
87 qreal minimumScale() const { return m_minScale; }
88 void setMinimumScale(qreal s) {
89 if (s == m_minScale)
90 return;
91 m_minScale = s;
92 emit minimumScaleChanged();
93 }
94 qreal maximumScale() const { return m_maxScale; }
95 void setMaximumScale(qreal s) {
96 if (s == m_maxScale)
97 return;
98 m_maxScale = s;
99 emit maximumScaleChanged();
100 }
101
102 qreal minimumRotation() const { return m_minRotation; }
103 void setMinimumRotation(qreal r) {
104 if (r == m_minRotation)
105 return;
106 m_minRotation = r;
107 emit minimumRotationChanged();
108 }
109 qreal maximumRotation() const { return m_maxRotation; }
110 void setMaximumRotation(qreal r) {
111 if (r == m_maxRotation)
112 return;
113 m_maxRotation = r;
114 emit maximumRotationChanged();
115 }
116
117 enum Axis { NoDrag=0x00, XAxis=0x01, YAxis=0x02, XandYAxis=0x03 };
118 Axis axis() const { return m_axis; }
119 void setAxis(Axis a) {
120 if (a == m_axis)
121 return;
122 m_axis = a;
123 emit dragAxisChanged();
124 }
125
126 qreal xmin() const { return m_xmin; }
127 void setXmin(qreal x) {
128 if (x == m_xmin)
129 return;
130 m_xmin = x;
131 emit minimumXChanged();
132 }
133 qreal xmax() const { return m_xmax; }
134 void setXmax(qreal x) {
135 if (x == m_xmax)
136 return;
137 m_xmax = x;
138 emit maximumXChanged();
139 }
140 qreal ymin() const { return m_ymin; }
141 void setYmin(qreal y) {
142 if (y == m_ymin)
143 return;
144 m_ymin = y;
145 emit minimumYChanged();
146 }
147 qreal ymax() const { return m_ymax; }
148 void setYmax(qreal y) {
149 if (y == m_ymax)
150 return;
151 m_ymax = y;
152 emit maximumYChanged();
153 }
154
155 bool active() const { return m_active; }
156 void setActive(bool a) {
157 if (a == m_active)
158 return;
159 m_active = a;
160 emit activeChanged();
161 }
162
163 signals:
164 void targetChanged();
165 void minimumScaleChanged();
166 void maximumScaleChanged();
167 void minimumRotationChanged();
168 void maximumRotationChanged();
169 void dragAxisChanged();
170 void minimumXChanged();
171 void maximumXChanged();
172 void minimumYChanged();
173 void maximumYChanged();
174 void activeChanged();
175
176 private:
177 QGraphicsObject *m_target;
178 qreal m_minScale;
179 qreal m_maxScale;
180 qreal m_minRotation;
181 qreal m_maxRotation;
182 Axis m_axis;
183 qreal m_xmin;
184 qreal m_xmax;
185 qreal m_ymin;
186 qreal m_ymax;
187 bool m_active;
188 };
189
190 class Q_AUTOTEST_EXPORT QDeclarativePinchEvent : public QObject
191 {
192 Q_OBJECT
193
Q_PROPERTY(QPointF center READ center)194 Q_PROPERTY(QPointF center READ center)
195 Q_PROPERTY(QPointF startCenter READ startCenter)
196 Q_PROPERTY(QPointF previousCenter READ previousCenter)
197 Q_PROPERTY(qreal scale READ scale)
198 Q_PROPERTY(qreal previousScale READ previousScale)
199 Q_PROPERTY(qreal angle READ angle)
200 Q_PROPERTY(qreal previousAngle READ previousAngle)
201 Q_PROPERTY(qreal rotation READ rotation)
202 Q_PROPERTY(QPointF point1 READ point1)
203 Q_PROPERTY(QPointF startPoint1 READ startPoint1)
204 Q_PROPERTY(QPointF point2 READ point2)
205 Q_PROPERTY(QPointF startPoint2 READ startPoint2)
206 Q_PROPERTY(int pointCount READ pointCount)
207 Q_PROPERTY(bool accepted READ accepted WRITE setAccepted)
208
209 public:
210 QDeclarativePinchEvent(QPointF c, qreal s, qreal a, qreal r)
211 : QObject(), m_center(c), m_scale(s), m_angle(a), m_rotation(r)
212 , m_pointCount(0), m_accepted(true) {}
213
center()214 QPointF center() const { return m_center; }
startCenter()215 QPointF startCenter() const { return m_startCenter; }
setStartCenter(QPointF c)216 void setStartCenter(QPointF c) { m_startCenter = c; }
previousCenter()217 QPointF previousCenter() const { return m_lastCenter; }
setPreviousCenter(QPointF c)218 void setPreviousCenter(QPointF c) { m_lastCenter = c; }
scale()219 qreal scale() const { return m_scale; }
previousScale()220 qreal previousScale() const { return m_lastScale; }
setPreviousScale(qreal s)221 void setPreviousScale(qreal s) { m_lastScale = s; }
angle()222 qreal angle() const { return m_angle; }
previousAngle()223 qreal previousAngle() const { return m_lastAngle; }
setPreviousAngle(qreal a)224 void setPreviousAngle(qreal a) { m_lastAngle = a; }
rotation()225 qreal rotation() const { return m_rotation; }
point1()226 QPointF point1() const { return m_point1; }
setPoint1(QPointF p)227 void setPoint1(QPointF p) { m_point1 = p; }
startPoint1()228 QPointF startPoint1() const { return m_startPoint1; }
setStartPoint1(QPointF p)229 void setStartPoint1(QPointF p) { m_startPoint1 = p; }
point2()230 QPointF point2() const { return m_point2; }
setPoint2(QPointF p)231 void setPoint2(QPointF p) { m_point2 = p; }
startPoint2()232 QPointF startPoint2() const { return m_startPoint2; }
setStartPoint2(QPointF p)233 void setStartPoint2(QPointF p) { m_startPoint2 = p; }
pointCount()234 int pointCount() const { return m_pointCount; }
setPointCount(int count)235 void setPointCount(int count) { m_pointCount = count; }
236
accepted()237 bool accepted() const { return m_accepted; }
setAccepted(bool a)238 void setAccepted(bool a) { m_accepted = a; }
239
240 private:
241 QPointF m_center;
242 QPointF m_startCenter;
243 QPointF m_lastCenter;
244 qreal m_scale;
245 qreal m_lastScale;
246 qreal m_angle;
247 qreal m_lastAngle;
248 qreal m_rotation;
249 QPointF m_point1;
250 QPointF m_point2;
251 QPointF m_startPoint1;
252 QPointF m_startPoint2;
253 int m_pointCount;
254 bool m_accepted;
255 };
256
257
258 class QDeclarativeMouseEvent;
259 class QDeclarativePinchAreaPrivate;
260 class Q_AUTOTEST_EXPORT QDeclarativePinchArea : public QDeclarativeItem
261 {
262 Q_OBJECT
263
264 Q_PROPERTY(bool enabled READ isEnabled WRITE setEnabled NOTIFY enabledChanged)
265 Q_PROPERTY(QDeclarativePinch *pinch READ pinch CONSTANT)
266
267 public:
268 QDeclarativePinchArea(QDeclarativeItem *parent=0);
269 ~QDeclarativePinchArea();
270
271 bool isEnabled() const;
272 void setEnabled(bool);
273
274 QDeclarativePinch *pinch();
275
276 Q_SIGNALS:
277 void enabledChanged();
278 void pinchStarted(QDeclarativePinchEvent *pinch);
279 void pinchUpdated(QDeclarativePinchEvent *pinch);
280 void pinchFinished(QDeclarativePinchEvent *pinch);
281
282 protected:
283 void mousePressEvent(QGraphicsSceneMouseEvent *event);
284 void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);
285 void mouseMoveEvent(QGraphicsSceneMouseEvent *event);
286 bool sceneEvent(QEvent *);
287 bool sendMouseEvent(QGraphicsSceneMouseEvent *event);
288 bool sceneEventFilter(QGraphicsItem *i, QEvent *e);
289 bool event(QEvent *);
290
291 virtual void geometryChanged(const QRectF &newGeometry,
292 const QRectF &oldGeometry);
293 virtual QVariant itemChange(GraphicsItemChange change, const QVariant& value);
294
295 private:
296 void updatePinch();
297 void handlePress();
298 void handleRelease();
299
300 private:
301 Q_DISABLE_COPY(QDeclarativePinchArea)
302 Q_DECLARE_PRIVATE_D(QGraphicsItem::d_ptr.data(), QDeclarativePinchArea)
303 };
304
305 QT_END_NAMESPACE
306
307 QML_DECLARE_TYPE(QDeclarativePinch)
308 QML_DECLARE_TYPE(QDeclarativePinchEvent)
309 QML_DECLARE_TYPE(QDeclarativePinchArea)
310
311 QT_END_HEADER
312
313 #endif // QDECLARATIVEPINCHAREA_H
314