--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/script/context2d/context2d.h Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,261 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef CONTEXT2D_H
+#define CONTEXT2D_H
+
+#include "domimage.h"
+
+#include <QPainter>
+#include <QPainterPath>
+#include <QString>
+#include <QStack>
+#include <QMetaType>
+#include <QTimerEvent>
+
+// [3]
+class CanvasGradient
+{
+public:
+ CanvasGradient(const QGradient &v)
+ : value(v) {}
+ CanvasGradient() {}
+
+ QGradient value;
+};
+// [3]
+
+Q_DECLARE_METATYPE(CanvasGradient)
+Q_DECLARE_METATYPE(CanvasGradient*)
+
+class ImageData {
+};
+
+class QContext2DCanvas;
+
+//! [0]
+class Context2D : public QObject
+{
+ Q_OBJECT
+ // compositing
+ Q_PROPERTY(qreal globalAlpha READ globalAlpha WRITE setGlobalAlpha)
+ Q_PROPERTY(QString globalCompositeOperation READ globalCompositeOperation WRITE setGlobalCompositeOperation)
+ Q_PROPERTY(QVariant strokeStyle READ strokeStyle WRITE setStrokeStyle)
+ Q_PROPERTY(QVariant fillStyle READ fillStyle WRITE setFillStyle)
+ // line caps/joins
+ Q_PROPERTY(qreal lineWidth READ lineWidth WRITE setLineWidth)
+ Q_PROPERTY(QString lineCap READ lineCap WRITE setLineCap)
+ Q_PROPERTY(QString lineJoin READ lineJoin WRITE setLineJoin)
+ Q_PROPERTY(qreal miterLimit READ miterLimit WRITE setMiterLimit)
+ // shadows
+ Q_PROPERTY(qreal shadowOffsetX READ shadowOffsetX WRITE setShadowOffsetX)
+ Q_PROPERTY(qreal shadowOffsetY READ shadowOffsetY WRITE setShadowOffsetY)
+ Q_PROPERTY(qreal shadowBlur READ shadowBlur WRITE setShadowBlur)
+ Q_PROPERTY(QString shadowColor READ shadowColor WRITE setShadowColor)
+//! [0]
+
+public:
+ Context2D(QObject *parent = 0);
+ void setSize(int width, int height);
+ void setSize(const QSize &size);
+ QSize size() const;
+
+ void clear();
+ void reset();
+
+ // compositing
+ qreal globalAlpha() const; // (default 1.0)
+ QString globalCompositeOperation() const; // (default over)
+ QVariant strokeStyle() const; // (default black)
+ QVariant fillStyle() const; // (default black)
+
+ void setGlobalAlpha(qreal alpha);
+ void setGlobalCompositeOperation(const QString &op);
+ void setStrokeStyle(const QVariant &style);
+ void setFillStyle(const QVariant &style);
+
+ // line caps/joins
+ qreal lineWidth() const; // (default 1)
+ QString lineCap() const; // "butt", "round", "square" (default "butt")
+ QString lineJoin() const; // "round", "bevel", "miter" (default "miter")
+ qreal miterLimit() const; // (default 10)
+
+ void setLineWidth(qreal w);
+ void setLineCap(const QString &s);
+ void setLineJoin(const QString &s);
+ void setMiterLimit(qreal m);
+
+ // shadows
+ qreal shadowOffsetX() const; // (default 0)
+ qreal shadowOffsetY() const; // (default 0)
+ qreal shadowBlur() const; // (default 0)
+ QString shadowColor() const; // (default black)
+
+ void setShadowOffsetX(qreal x);
+ void setShadowOffsetY(qreal y);
+ void setShadowBlur(qreal b);
+ void setShadowColor(const QString &str);
+
+//! [1]
+public slots:
+ void save(); // push state on state stack
+ void restore(); // pop state stack and restore state
+
+ void scale(qreal x, qreal y);
+ void rotate(qreal angle);
+ void translate(qreal x, qreal y);
+ void transform(qreal m11, qreal m12, qreal m21, qreal m22,
+ qreal dx, qreal dy);
+ void setTransform(qreal m11, qreal m12, qreal m21, qreal m22,
+ qreal dx, qreal dy);
+
+ CanvasGradient createLinearGradient(qreal x0, qreal y0,
+ qreal x1, qreal y1);
+ CanvasGradient createRadialGradient(qreal x0, qreal y0,
+ qreal r0, qreal x1,
+ qreal y1, qreal r1);
+
+ // rects
+ void clearRect(qreal x, qreal y, qreal w, qreal h);
+ void fillRect(qreal x, qreal y, qreal w, qreal h);
+ void strokeRect(qreal x, qreal y, qreal w, qreal h);
+
+ // path API
+ void beginPath();
+ void closePath();
+ void moveTo(qreal x, qreal y);
+ void lineTo(qreal x, qreal y);
+ void quadraticCurveTo(qreal cpx, qreal cpy, qreal x, qreal y);
+ void bezierCurveTo(qreal cp1x, qreal cp1y,
+ qreal cp2x, qreal cp2y, qreal x, qreal y);
+ void arcTo(qreal x1, qreal y1, qreal x2, qreal y2, qreal radius);
+ void rect(qreal x, qreal y, qreal w, qreal h);
+ void arc(qreal x, qreal y, qreal radius,
+ qreal startAngle, qreal endAngle,
+ bool anticlockwise);
+ void fill();
+ void stroke();
+ void clip();
+ bool isPointInPath(qreal x, qreal y) const;
+//! [1]
+
+ // drawing images
+ void drawImage(DomImage *image, qreal dx, qreal dy);
+ void drawImage(DomImage *image, qreal dx, qreal dy,
+ qreal dw, qreal dh);
+ void drawImage(DomImage *image, qreal sx, qreal sy,
+ qreal sw, qreal sh, qreal dx, qreal dy,
+ qreal dw, qreal dh);
+
+ // pixel manipulation
+ ImageData getImageData(qreal sx, qreal sy, qreal sw, qreal sh);
+ void putImageData(ImageData image, qreal dx, qreal dy);
+
+//! [2]
+signals:
+ void changed(const QImage &image);
+//! [2]
+
+protected:
+ void timerEvent(QTimerEvent *e);
+
+private:
+ void beginPainting();
+ const QImage &endPainting();
+ void scheduleChange();
+
+ int m_changeTimerId;
+ QImage m_image;
+ QPainter m_painter;
+ QPainterPath m_path;
+
+ enum DirtyFlag {
+ DirtyTransformationMatrix = 0x00001,
+ DirtyClippingRegion = 0x00002,
+ DirtyStrokeStyle = 0x00004,
+ DirtyFillStyle = 0x00008,
+ DirtyGlobalAlpha = 0x00010,
+ DirtyLineWidth = 0x00020,
+ DirtyLineCap = 0x00040,
+ DirtyLineJoin = 0x00080,
+ DirtyMiterLimit = 0x00100,
+ MDirtyPen = DirtyStrokeStyle
+ | DirtyLineWidth
+ | DirtyLineCap
+ | DirtyLineJoin
+ | DirtyMiterLimit,
+ DirtyShadowOffsetX = 0x00200,
+ DirtyShadowOffsetY = 0x00400,
+ DirtyShadowBlur = 0x00800,
+ DirtyShadowColor = 0x01000,
+ DirtyGlobalCompositeOperation = 0x2000,
+ DirtyFont = 0x04000,
+ DirtyTextAlign = 0x08000,
+ DirtyTextBaseline = 0x10000,
+ AllIsFullOfDirt = 0xfffff
+ };
+
+ struct State {
+ State() : flags(0) {}
+ QMatrix matrix;
+ QPainterPath clipPath;
+ QBrush strokeStyle;
+ QBrush fillStyle;
+ qreal globalAlpha;
+ qreal lineWidth;
+ Qt::PenCapStyle lineCap;
+ Qt::PenJoinStyle lineJoin;
+ qreal miterLimit;
+ qreal shadowOffsetX;
+ qreal shadowOffsetY;
+ qreal shadowBlur;
+ QColor shadowColor;
+ QPainter::CompositionMode globalCompositeOperation;
+ QFont font;
+ int textAlign;
+ int textBaseline;
+ int flags;
+ };
+ State m_state;
+ QStack<State> m_stateStack;
+};
+
+#endif