source: trunk/examples/script/context2d/context2d.h

Last change on this file was 846, checked in by Dmitry A. Kuminov, 14 years ago

trunk: Merged in qt 4.7.2 sources from branches/vendor/nokia/qt.
File size: 8.8 KB
RevLine 
[2]1/****************************************************************************
2**
[846]3** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
[561]4** All rights reserved.
5** Contact: Nokia Corporation ([email protected])
[2]6**
7** This file is part of the examples of the Qt Toolkit.
8**
[846]9** $QT_BEGIN_LICENSE:BSD$
10** You may use this file under the terms of the BSD license as follows:
[2]11**
[846]12** "Redistribution and use in source and binary forms, with or without
13** modification, are permitted provided that the following conditions are
14** met:
15** * Redistributions of source code must retain the above copyright
16** notice, this list of conditions and the following disclaimer.
17** * Redistributions in binary form must reproduce the above copyright
18** notice, this list of conditions and the following disclaimer in
19** the documentation and/or other materials provided with the
20** distribution.
21** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
22** the names of its contributors may be used to endorse or promote
23** products derived from this software without specific prior written
24** permission.
[2]25**
[846]26** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
27** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
28** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
29** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
30** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
31** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
32** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
33** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
34** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
35** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
36** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
[2]37** $QT_END_LICENSE$
38**
39****************************************************************************/
40
41#ifndef CONTEXT2D_H
42#define CONTEXT2D_H
43
44#include "domimage.h"
45
46#include <QPainter>
47#include <QPainterPath>
48#include <QString>
49#include <QStack>
50#include <QMetaType>
51#include <QTimerEvent>
52
53// [3]
54class CanvasGradient
55{
56public:
57 CanvasGradient(const QGradient &v)
58 : value(v) {}
59 CanvasGradient() {}
60
61 QGradient value;
62};
63// [3]
64
65Q_DECLARE_METATYPE(CanvasGradient)
66Q_DECLARE_METATYPE(CanvasGradient*)
67
68class ImageData {
69};
70
71class QContext2DCanvas;
72
73//! [0]
74class Context2D : public QObject
75{
76 Q_OBJECT
77 // compositing
78 Q_PROPERTY(qreal globalAlpha READ globalAlpha WRITE setGlobalAlpha)
79 Q_PROPERTY(QString globalCompositeOperation READ globalCompositeOperation WRITE setGlobalCompositeOperation)
80 Q_PROPERTY(QVariant strokeStyle READ strokeStyle WRITE setStrokeStyle)
81 Q_PROPERTY(QVariant fillStyle READ fillStyle WRITE setFillStyle)
82 // line caps/joins
83 Q_PROPERTY(qreal lineWidth READ lineWidth WRITE setLineWidth)
84 Q_PROPERTY(QString lineCap READ lineCap WRITE setLineCap)
85 Q_PROPERTY(QString lineJoin READ lineJoin WRITE setLineJoin)
86 Q_PROPERTY(qreal miterLimit READ miterLimit WRITE setMiterLimit)
87 // shadows
88 Q_PROPERTY(qreal shadowOffsetX READ shadowOffsetX WRITE setShadowOffsetX)
89 Q_PROPERTY(qreal shadowOffsetY READ shadowOffsetY WRITE setShadowOffsetY)
90 Q_PROPERTY(qreal shadowBlur READ shadowBlur WRITE setShadowBlur)
91 Q_PROPERTY(QString shadowColor READ shadowColor WRITE setShadowColor)
92//! [0]
93
94public:
95 Context2D(QObject *parent = 0);
96 void setSize(int width, int height);
97 void setSize(const QSize &size);
98 QSize size() const;
99
100 void clear();
101 void reset();
102
103 // compositing
104 qreal globalAlpha() const; // (default 1.0)
105 QString globalCompositeOperation() const; // (default over)
106 QVariant strokeStyle() const; // (default black)
107 QVariant fillStyle() const; // (default black)
108
109 void setGlobalAlpha(qreal alpha);
110 void setGlobalCompositeOperation(const QString &op);
111 void setStrokeStyle(const QVariant &style);
112 void setFillStyle(const QVariant &style);
113
114 // line caps/joins
115 qreal lineWidth() const; // (default 1)
116 QString lineCap() const; // "butt", "round", "square" (default "butt")
117 QString lineJoin() const; // "round", "bevel", "miter" (default "miter")
118 qreal miterLimit() const; // (default 10)
119
120 void setLineWidth(qreal w);
121 void setLineCap(const QString &s);
122 void setLineJoin(const QString &s);
123 void setMiterLimit(qreal m);
124
125 // shadows
126 qreal shadowOffsetX() const; // (default 0)
127 qreal shadowOffsetY() const; // (default 0)
128 qreal shadowBlur() const; // (default 0)
129 QString shadowColor() const; // (default black)
130
131 void setShadowOffsetX(qreal x);
132 void setShadowOffsetY(qreal y);
133 void setShadowBlur(qreal b);
134 void setShadowColor(const QString &str);
135
136//! [1]
137public slots:
138 void save(); // push state on state stack
139 void restore(); // pop state stack and restore state
140
141 void scale(qreal x, qreal y);
142 void rotate(qreal angle);
143 void translate(qreal x, qreal y);
144 void transform(qreal m11, qreal m12, qreal m21, qreal m22,
145 qreal dx, qreal dy);
146 void setTransform(qreal m11, qreal m12, qreal m21, qreal m22,
147 qreal dx, qreal dy);
148
149 CanvasGradient createLinearGradient(qreal x0, qreal y0,
150 qreal x1, qreal y1);
151 CanvasGradient createRadialGradient(qreal x0, qreal y0,
152 qreal r0, qreal x1,
153 qreal y1, qreal r1);
154
155 // rects
156 void clearRect(qreal x, qreal y, qreal w, qreal h);
157 void fillRect(qreal x, qreal y, qreal w, qreal h);
158 void strokeRect(qreal x, qreal y, qreal w, qreal h);
159
160 // path API
161 void beginPath();
162 void closePath();
163 void moveTo(qreal x, qreal y);
164 void lineTo(qreal x, qreal y);
165 void quadraticCurveTo(qreal cpx, qreal cpy, qreal x, qreal y);
166 void bezierCurveTo(qreal cp1x, qreal cp1y,
167 qreal cp2x, qreal cp2y, qreal x, qreal y);
168 void arcTo(qreal x1, qreal y1, qreal x2, qreal y2, qreal radius);
169 void rect(qreal x, qreal y, qreal w, qreal h);
170 void arc(qreal x, qreal y, qreal radius,
171 qreal startAngle, qreal endAngle,
172 bool anticlockwise);
173 void fill();
174 void stroke();
175 void clip();
176 bool isPointInPath(qreal x, qreal y) const;
177//! [1]
178
179 // drawing images
180 void drawImage(DomImage *image, qreal dx, qreal dy);
181 void drawImage(DomImage *image, qreal dx, qreal dy,
182 qreal dw, qreal dh);
183 void drawImage(DomImage *image, qreal sx, qreal sy,
184 qreal sw, qreal sh, qreal dx, qreal dy,
185 qreal dw, qreal dh);
186
187 // pixel manipulation
188 ImageData getImageData(qreal sx, qreal sy, qreal sw, qreal sh);
189 void putImageData(ImageData image, qreal dx, qreal dy);
190
191//! [2]
192signals:
193 void changed(const QImage &image);
194//! [2]
195
196protected:
197 void timerEvent(QTimerEvent *e);
198
199private:
200 void beginPainting();
201 const QImage &endPainting();
202 void scheduleChange();
203
204 int m_changeTimerId;
205 QImage m_image;
206 QPainter m_painter;
207 QPainterPath m_path;
208
209 enum DirtyFlag {
210 DirtyTransformationMatrix = 0x00001,
211 DirtyClippingRegion = 0x00002,
212 DirtyStrokeStyle = 0x00004,
213 DirtyFillStyle = 0x00008,
214 DirtyGlobalAlpha = 0x00010,
215 DirtyLineWidth = 0x00020,
216 DirtyLineCap = 0x00040,
217 DirtyLineJoin = 0x00080,
218 DirtyMiterLimit = 0x00100,
219 MDirtyPen = DirtyStrokeStyle
220 | DirtyLineWidth
221 | DirtyLineCap
222 | DirtyLineJoin
223 | DirtyMiterLimit,
224 DirtyShadowOffsetX = 0x00200,
225 DirtyShadowOffsetY = 0x00400,
226 DirtyShadowBlur = 0x00800,
227 DirtyShadowColor = 0x01000,
228 DirtyGlobalCompositeOperation = 0x2000,
229 DirtyFont = 0x04000,
230 DirtyTextAlign = 0x08000,
231 DirtyTextBaseline = 0x10000,
232 AllIsFullOfDirt = 0xfffff
233 };
234
235 struct State {
236 State() : flags(0) {}
237 QMatrix matrix;
238 QPainterPath clipPath;
239 QBrush strokeStyle;
240 QBrush fillStyle;
241 qreal globalAlpha;
242 qreal lineWidth;
243 Qt::PenCapStyle lineCap;
244 Qt::PenJoinStyle lineJoin;
245 qreal miterLimit;
246 qreal shadowOffsetX;
247 qreal shadowOffsetY;
248 qreal shadowBlur;
249 QColor shadowColor;
250 QPainter::CompositionMode globalCompositeOperation;
251 QFont font;
252 int textAlign;
253 int textBaseline;
254 int flags;
255 };
256 State m_state;
257 QStack<State> m_stateStack;
258};
259
260#endif
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