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Diffstat (limited to 'src/qt3support/painting/q3picture.cpp')
| -rw-r--r-- | src/qt3support/painting/q3picture.cpp | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/src/qt3support/painting/q3picture.cpp b/src/qt3support/painting/q3picture.cpp new file mode 100644 index 0000000..c2aae07 --- /dev/null +++ b/src/qt3support/painting/q3picture.cpp @@ -0,0 +1,235 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (qt-info@nokia.com) +** +** This file is part of the Qt3Support module 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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@nokia.com. +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "private/qpicture_p.h" +#include "qfile.h" +#include "qpainter.h" +#include "q3picture.h" +#include "q3paintengine_svg_p.h" + +QT_BEGIN_NAMESPACE + +class Q3SvgDevice : public QPaintDevice +{ +public: + Q3SvgDevice() : QPaintDevice() {} + bool load(QIODevice *dev) { return svgEngine.load(dev); } + bool save(const QString &fileName) { return svgEngine.save(fileName); } + bool save(QIODevice *dev) { return svgEngine.save(dev); } + void setBoundingRect(const QRect &rect) { svgEngine.setBoundingRect(rect); } + QRect boundingRect() const { return svgEngine.boundingRect(); } + QPaintEngine *paintEngine() const { return (QPaintEngine *)&svgEngine; } + bool play(QPainter *p) { return svgEngine.play(p); } + int metric(PaintDeviceMetric m) const; + +private: + Q3SVGPaintEngine svgEngine; +}; + +int Q3SvgDevice::metric(PaintDeviceMetric m) const +{ + int val; + QRect br = svgEngine.boundingRect(); + switch (m) { + case PdmWidth: + val = br.width(); + break; + case PdmHeight: + val = br.height(); + break; + case PdmWidthMM: + val = int(25.4/72.0*br.width()); + break; + case PdmHeightMM: + val = int(25.4/72.0*br.height()); + break; + case PdmDpiX: + val = 72; + break; + case PdmDpiY: + val = 72; + break; + case PdmNumColors: + val = 16777216; + break; + case PdmDepth: + val = 24; + break; + default: + val = 0; + qWarning("Q3SvgDevice::metric: Invalid metric command"); + } + return val; +} + +/*! + \class Q3Picture + \brief The Q3Picture class is a paint device that records and + replays Q3Painter commands. + + \compat + + Q3Picture can also read and write SVG (Scalable Vector Graphics) + files, a \l{http://www.w3.org/Graphics/SVG/} {W3C} XML format. + Note that when using the load() and save() functions to read and + write SVG files, the format must be specified. + + \sa QPicture +*/ + +/*! + \fn Q3Picture::Q3Picture() + + Constructs a Q3Picture. +*/ + +/*! + \fn Q3Picture::Q3Picture(const QPicture &other) + + Constructs a copy of \a other. +*/ + +/*! + \overload + Loads the picture in the specified \a format from a file with the + given \a fileName. Returns true if the file is loaded successfully; + otherwise returns false. +*/ +bool Q3Picture::load(const QString &fileName, const char *format) +{ + QFile f(fileName); + if (!f.open(QIODevice::ReadOnly)) + return false; + return load(&f, format); +} + +/*! + \fn bool Q3Picture::load(QIODevice *device, const char *format) + + Loads the picture in the specified \a format from the given \a device. + Returns true if the file is loaded successfully; otherwise returns false. + + Note that when using the load() function to read SVG files, the + format must be specified. For example: + + \snippet doc/src/snippets/code/src_qt3support_painting_q3picture.cpp 0 + + \sa save() +*/ +bool Q3Picture::load(QIODevice *dev, const char *format) +{ + if (qstrcmp(format, "svg" ) == 0) { + Q3SvgDevice svg; + if (!svg.load(dev)) + return false; + QPainter p(this); + p.setRenderHint(QPainter::Antialiasing); + bool b = svg.play(&p); + d_func()->brect = svg.boundingRect(); + return b; + } + return QPicture::load(dev, format); +} + +/*! + \overload + Saves the picture in the specified \a format to the file with the + given \a fileName. + + \sa load() +*/ +bool Q3Picture::save(const QString &fileName, const char *format) +{ + if (paintingActive()) { + qWarning("Q3Picture::save: still being painted on. " + "Call QPainter::end() first"); + return false; + } + + // identical to QIODevice* code below but the file name + // makes a difference when it comes to saving pixmaps + if (qstricmp( format, "svg") == 0) { + Q3SvgDevice svg; + QPainter p(&svg); + if (!play(&p)) + return false; + svg.setBoundingRect(boundingRect()); + return svg.save(fileName); + } + + return QPicture::save(fileName, format); +} + +/*! + \fn bool Q3Picture::save(QIODevice *device, const char *format) + + Saves the picture in the specified \a format to the given \a device. + Returns true if the save is successful. Returns false if, for + example, the picture is still being painted, i.e., QPainter::end() + has not yet been called. + + Note that when using the save() function to save SVG files, the + format must be specified. For example: + + \snippet doc/src/snippets/code/src_qt3support_painting_q3picture.cpp 1 + + \sa load() +*/ +bool Q3Picture::save(QIODevice *dev, const char *format) +{ + if (paintingActive()) { + qWarning("Q3Picture::save: still being painted on. " + "Call QPainter::end() first"); + return false; + } + + if (qstricmp(format, "svg") == 0) { + Q3SvgDevice svg; + QPainter p(&svg); + if (!play(&p)) + return false; + svg.setBoundingRect(boundingRect()); + return svg.save(dev); + } + return QPicture::save(dev, format); +} + +QT_END_NAMESPACE |