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Diffstat (limited to 'src/shared/qtgradienteditor/qtgradientutils.cpp')
| -rw-r--r-- | src/shared/qtgradienteditor/qtgradientutils.cpp | 420 |
1 files changed, 420 insertions, 0 deletions
diff --git a/src/shared/qtgradienteditor/qtgradientutils.cpp b/src/shared/qtgradienteditor/qtgradientutils.cpp new file mode 100644 index 000000000..cfc4c25b8 --- /dev/null +++ b/src/shared/qtgradienteditor/qtgradientutils.cpp @@ -0,0 +1,420 @@ +/**************************************************************************** +** +** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the tools applications 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. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qtgradientutils.h" +#include "qtgradientmanager.h" +#include <QtGui/QLinearGradient> +#include <QtGui/QRadialGradient> +#include <QtGui/QConicalGradient> +#include <QtXml/QDomDocument> +#include <QtCore/QDebug> + +QT_BEGIN_NAMESPACE + +static QString gradientTypeToString(QGradient::Type type) +{ + if (type == QGradient::LinearGradient) + return QLatin1String("LinearGradient"); + if (type == QGradient::RadialGradient) + return QLatin1String("RadialGradient"); + if (type == QGradient::ConicalGradient) + return QLatin1String("ConicalGradient"); + return QLatin1String("NoGradient"); +} + +static QGradient::Type stringToGradientType(const QString &name) +{ + if (name == QLatin1String("LinearGradient")) + return QGradient::LinearGradient; + if (name == QLatin1String("RadialGradient")) + return QGradient::RadialGradient; + if (name == QLatin1String("ConicalGradient")) + return QGradient::ConicalGradient; + return QGradient::NoGradient; +} + +static QString gradientSpreadToString(QGradient::Spread spread) +{ + if (spread == QGradient::PadSpread) + return QLatin1String("PadSpread"); + if (spread == QGradient::RepeatSpread) + return QLatin1String("RepeatSpread"); + if (spread == QGradient::ReflectSpread) + return QLatin1String("ReflectSpread"); + return QLatin1String("PadSpread"); +} + +static QGradient::Spread stringToGradientSpread(const QString &name) +{ + if (name == QLatin1String("PadSpread")) + return QGradient::PadSpread; + if (name == QLatin1String("RepeatSpread")) + return QGradient::RepeatSpread; + if (name == QLatin1String("ReflectSpread")) + return QGradient::ReflectSpread; + return QGradient::PadSpread; +} + +static QString gradientCoordinateModeToString(QGradient::CoordinateMode mode) +{ + if (mode == QGradient::LogicalMode) + return QLatin1String("LogicalMode"); + if (mode == QGradient::StretchToDeviceMode) + return QLatin1String("StretchToDeviceMode"); + if (mode == QGradient::ObjectBoundingMode) + return QLatin1String("ObjectBoundingMode"); + return QLatin1String("StretchToDeviceMode"); +} + +static QGradient::CoordinateMode stringToGradientCoordinateMode(const QString &name) +{ + if (name == QLatin1String("LogicalMode")) + return QGradient::LogicalMode; + if (name == QLatin1String("StretchToDeviceMode")) + return QGradient::StretchToDeviceMode; + if (name == QLatin1String("ObjectBoundingMode")) + return QGradient::ObjectBoundingMode; + return QGradient::StretchToDeviceMode; +} + +static QDomElement saveColor(QDomDocument &doc, const QColor &color) +{ + QDomElement colorElem = doc.createElement(QLatin1String("colorData")); + + colorElem.setAttribute(QLatin1String("r"), QString::number(color.red())); + colorElem.setAttribute(QLatin1String("g"), QString::number(color.green())); + colorElem.setAttribute(QLatin1String("b"), QString::number(color.blue())); + colorElem.setAttribute(QLatin1String("a"), QString::number(color.alpha())); + + return colorElem; +} + +static QDomElement saveGradientStop(QDomDocument &doc, const QGradientStop &stop) +{ + QDomElement stopElem = doc.createElement(QLatin1String("stopData")); + + stopElem.setAttribute(QLatin1String("position"), QString::number(stop.first)); + + const QDomElement colorElem = saveColor(doc, stop.second); + stopElem.appendChild(colorElem); + + return stopElem; +} + +static QDomElement saveGradient(QDomDocument &doc, const QGradient &gradient) +{ + QDomElement gradElem = doc.createElement(QLatin1String("gradientData")); + + const QGradient::Type type = gradient.type(); + gradElem.setAttribute(QLatin1String("type"), gradientTypeToString(type)); + gradElem.setAttribute(QLatin1String("spread"), gradientSpreadToString(gradient.spread())); + gradElem.setAttribute(QLatin1String("coordinateMode"), gradientCoordinateModeToString(gradient.coordinateMode())); + + QGradientStops stops = gradient.stops(); + QVectorIterator<QGradientStop > it(stops); + while (it.hasNext()) + gradElem.appendChild(saveGradientStop(doc, it.next())); + + if (type == QGradient::LinearGradient) { + const QLinearGradient &g = *static_cast<const QLinearGradient *>(&gradient); + gradElem.setAttribute(QLatin1String("startX"), QString::number(g.start().x())); + gradElem.setAttribute(QLatin1String("startY"), QString::number(g.start().y())); + gradElem.setAttribute(QLatin1String("endX"), QString::number(g.finalStop().x())); + gradElem.setAttribute(QLatin1String("endY"), QString::number(g.finalStop().y())); + } else if (type == QGradient::RadialGradient) { + const QRadialGradient &g = *static_cast<const QRadialGradient *>(&gradient); + gradElem.setAttribute(QLatin1String("centerX"), QString::number(g.center().x())); + gradElem.setAttribute(QLatin1String("centerY"), QString::number(g.center().y())); + gradElem.setAttribute(QLatin1String("focalX"), QString::number(g.focalPoint().x())); + gradElem.setAttribute(QLatin1String("focalY"), QString::number(g.focalPoint().y())); + gradElem.setAttribute(QLatin1String("radius"), QString::number(g.radius())); + } else if (type == QGradient::ConicalGradient) { + const QConicalGradient &g = *static_cast<const QConicalGradient*>(&gradient); + gradElem.setAttribute(QLatin1String("centerX"), QString::number(g.center().x())); + gradElem.setAttribute(QLatin1String("centerY"), QString::number(g.center().y())); + gradElem.setAttribute(QLatin1String("angle"), QString::number(g.angle())); + } + + return gradElem; +} + +static QColor loadColor(const QDomElement &elem) +{ + if (elem.tagName() != QLatin1String("colorData")) + return QColor(); + + return QColor(elem.attribute(QLatin1String("r")).toInt(), + elem.attribute(QLatin1String("g")).toInt(), + elem.attribute(QLatin1String("b")).toInt(), + elem.attribute(QLatin1String("a")).toInt()); +} + +static QGradientStop loadGradientStop(const QDomElement &elem) +{ + if (elem.tagName() != QLatin1String("stopData")) + return QGradientStop(); + + const qreal pos = static_cast<qreal>(elem.attribute(QLatin1String("position")).toDouble()); + return qMakePair(pos, loadColor(elem.firstChild().toElement())); +} + +static QGradient loadGradient(const QDomElement &elem) +{ + if (elem.tagName() != QLatin1String("gradientData")) + return QLinearGradient(); + + const QGradient::Type type = stringToGradientType(elem.attribute(QLatin1String("type"))); + const QGradient::Spread spread = stringToGradientSpread(elem.attribute(QLatin1String("spread"))); + const QGradient::CoordinateMode mode = stringToGradientCoordinateMode(elem.attribute(QLatin1String("coordinateMode"))); + + QGradient gradient = QLinearGradient(); + + if (type == QGradient::LinearGradient) { + QLinearGradient g; + g.setStart(elem.attribute(QLatin1String("startX")).toDouble(), elem.attribute(QLatin1String("startY")).toDouble()); + g.setFinalStop(elem.attribute(QLatin1String("endX")).toDouble(), elem.attribute(QLatin1String("endY")).toDouble()); + gradient = g; + } else if (type == QGradient::RadialGradient) { + QRadialGradient g; + g.setCenter(elem.attribute(QLatin1String("centerX")).toDouble(), elem.attribute(QLatin1String("centerY")).toDouble()); + g.setFocalPoint(elem.attribute(QLatin1String("focalX")).toDouble(), elem.attribute(QLatin1String("focalY")).toDouble()); + g.setRadius(elem.attribute(QLatin1String("radius")).toDouble()); + gradient = g; + } else if (type == QGradient::ConicalGradient) { + QConicalGradient g; + g.setCenter(elem.attribute(QLatin1String("centerX")).toDouble(), elem.attribute(QLatin1String("centerY")).toDouble()); + g.setAngle(elem.attribute(QLatin1String("angle")).toDouble()); + gradient = g; + } + + QDomElement stopElem = elem.firstChildElement(); + while (!stopElem.isNull()) { + QGradientStop stop = loadGradientStop(stopElem); + + gradient.setColorAt(stop.first, stop.second); + + stopElem = stopElem.nextSiblingElement(); + } + + gradient.setSpread(spread); + gradient.setCoordinateMode(mode); + + return gradient; +} + +QString QtGradientUtils::saveState(const QtGradientManager *manager) +{ + QDomDocument doc; + + QDomElement rootElem = doc.createElement(QLatin1String("gradients")); + + QMap<QString, QGradient> grads = manager->gradients(); + QMapIterator<QString, QGradient> itGrad(grads); + while (itGrad.hasNext()) { + itGrad.next(); + QDomElement idElem = doc.createElement(QLatin1String("gradient")); + idElem.setAttribute(QLatin1String("name"), itGrad.key()); + QDomElement gradElem = saveGradient(doc, itGrad.value()); + idElem.appendChild(gradElem); + + rootElem.appendChild(idElem); + } + + doc.appendChild(rootElem); + + return doc.toString(); +} + +void QtGradientUtils::restoreState(QtGradientManager *manager, const QString &state) +{ + manager->clear(); + + QDomDocument doc; + doc.setContent(state); + + QDomElement rootElem = doc.documentElement(); + + QDomElement gradElem = rootElem.firstChildElement(); + while (!gradElem.isNull()) { + const QString name = gradElem.attribute(QLatin1String("name")); + const QGradient gradient = loadGradient(gradElem.firstChildElement()); + + manager->addGradient(name, gradient); + gradElem = gradElem.nextSiblingElement(); + } +} + +QPixmap QtGradientUtils::gradientPixmap(const QGradient &gradient, const QSize &size, bool checkeredBackground) +{ + QImage image(size, QImage::Format_ARGB32); + QPainter p(&image); + p.setCompositionMode(QPainter::CompositionMode_Source); + + if (checkeredBackground) { + int pixSize = 20; + QPixmap pm(2 * pixSize, 2 * pixSize); + + QPainter pmp(&pm); + pmp.fillRect(0, 0, pixSize, pixSize, Qt::lightGray); + pmp.fillRect(pixSize, pixSize, pixSize, pixSize, Qt::lightGray); + pmp.fillRect(0, pixSize, pixSize, pixSize, Qt::darkGray); + pmp.fillRect(pixSize, 0, pixSize, pixSize, Qt::darkGray); + + p.setBrushOrigin((size.width() % pixSize + pixSize) / 2, (size.height() % pixSize + pixSize) / 2); + p.fillRect(0, 0, size.width(), size.height(), pm); + p.setBrushOrigin(0, 0); + p.setCompositionMode(QPainter::CompositionMode_SourceOver); + } + + const qreal scaleFactor = 0.999999; + p.scale(scaleFactor, scaleFactor); + QGradient grad = gradient; + grad.setCoordinateMode(QGradient::StretchToDeviceMode); + p.fillRect(QRect(0, 0, size.width(), size.height()), grad); + p.drawRect(QRect(0, 0, size.width() - 1, size.height() - 1)); + + return QPixmap::fromImage(image); +} + +static QString styleSheetFillName(const QGradient &gradient) +{ + QString result; + + switch (gradient.type()) { + case QGradient::LinearGradient: + result += QLatin1String("qlineargradient"); + break; + case QGradient::RadialGradient: + result += QLatin1String("qradialgradient"); + break; + case QGradient::ConicalGradient: + result += QLatin1String("qconicalgradient"); + break; + default: + qWarning() << "QtGradientUtils::styleSheetFillName(): gradient type" << gradient.type() << "not supported!"; + break; + } + + return result; +} + +static QStringList styleSheetParameters(const QGradient &gradient) +{ + QStringList result; + + if (gradient.type() != QGradient::ConicalGradient) { + QString spread; + switch (gradient.spread()) { + case QGradient::PadSpread: + spread = QLatin1String("pad"); + break; + case QGradient::ReflectSpread: + spread = QLatin1String("reflect"); + break; + case QGradient::RepeatSpread: + spread = QLatin1String("repeat"); + break; + default: + qWarning() << "QtGradientUtils::styleSheetParameters(): gradient spread" << gradient.spread() << "not supported!"; + break; + } + result << QLatin1String("spread:") + spread; + } + + switch (gradient.type()) { + case QGradient::LinearGradient: { + const QLinearGradient *linearGradient = static_cast<const QLinearGradient*>(&gradient); + result << QLatin1String("x1:") + QString::number(linearGradient->start().x()) + << QLatin1String("y1:") + QString::number(linearGradient->start().y()) + << QLatin1String("x2:") + QString::number(linearGradient->finalStop().x()) + << QLatin1String("y2:") + QString::number(linearGradient->finalStop().y()); + break; + } + case QGradient::RadialGradient: { + const QRadialGradient *radialGradient = static_cast<const QRadialGradient*>(&gradient); + result << QLatin1String("cx:") + QString::number(radialGradient->center().x()) + << QLatin1String("cy:") + QString::number(radialGradient->center().y()) + << QLatin1String("radius:") + QString::number(radialGradient->radius()) + << QLatin1String("fx:") + QString::number(radialGradient->focalPoint().x()) + << QLatin1String("fy:") + QString::number(radialGradient->focalPoint().y()); + break; + } + case QGradient::ConicalGradient: { + const QConicalGradient *conicalGradient = static_cast<const QConicalGradient*>(&gradient); + result << QLatin1String("cx:") + QString::number(conicalGradient->center().x()) + << QLatin1String("cy:") + QString::number(conicalGradient->center().y()) + << QLatin1String("angle:") + QString::number(conicalGradient->angle()); + break; + } + default: + qWarning() << "QtGradientUtils::styleSheetParameters(): gradient type" << gradient.type() << "not supported!"; + break; + } + + return result; +} + +static QStringList styleSheetStops(const QGradient &gradient) +{ + QStringList result; + foreach (const QGradientStop &stop, gradient.stops()) { + const QColor color = stop.second; + + const QString stopDescription = QLatin1String("stop:") + QString::number(stop.first) + QLatin1String(" rgba(") + + QString::number(color.red()) + QLatin1String(", ") + + QString::number(color.green()) + QLatin1String(", ") + + QString::number(color.blue()) + QLatin1String(", ") + + QString::number(color.alpha()) + QLatin1Char(')'); + result << stopDescription; + } + + return result; +} + +QString QtGradientUtils::styleSheetCode(const QGradient &gradient) +{ + QStringList gradientParameters; + gradientParameters << styleSheetParameters(gradient) << styleSheetStops(gradient); + + return styleSheetFillName(gradient) + QLatin1Char('(') + gradientParameters.join(QLatin1String(", ")) + QLatin1Char(')'); +} + +QT_END_NAMESPACE |