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Diffstat (limited to 'examples/widgets/painting/shared/arthurwidgets.cpp')
| -rw-r--r-- | examples/widgets/painting/shared/arthurwidgets.cpp | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/examples/widgets/painting/shared/arthurwidgets.cpp b/examples/widgets/painting/shared/arthurwidgets.cpp new file mode 100644 index 0000000000..cf790fea3b --- /dev/null +++ b/examples/widgets/painting/shared/arthurwidgets.cpp @@ -0,0 +1,355 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the demonstration applications of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** 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. +** +** 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "arthurwidgets.h" +#include <QApplication> +#include <QPainter> +#include <QPainterPath> +#include <QPixmapCache> +#include <QtEvents> +#include <QTextDocument> +#include <QAbstractTextDocumentLayout> +#include <QFile> +#include <QTextBrowser> +#include <QBoxLayout> + +extern QPixmap cached(const QString &img); + +ArthurFrame::ArthurFrame(QWidget *parent) + : QWidget(parent) + , m_prefer_image(false) +{ +#ifdef QT_OPENGL_SUPPORT + glw = 0; + m_use_opengl = false; + QGLFormat f = QGLFormat::defaultFormat(); + f.setSampleBuffers(true); + f.setStencil(true); + f.setAlpha(true); + f.setAlphaBufferSize(8); + QGLFormat::setDefaultFormat(f); +#endif + m_document = 0; + m_show_doc = false; + + m_tile = QPixmap(128, 128); + m_tile.fill(Qt::white); + QPainter pt(&m_tile); + QColor color(230, 230, 230); + pt.fillRect(0, 0, 64, 64, color); + pt.fillRect(64, 64, 64, 64, color); + pt.end(); + +// QPalette pal = palette(); +// pal.setBrush(backgroundRole(), m_tile); +// setPalette(pal); +} + + +#ifdef QT_OPENGL_SUPPORT +void ArthurFrame::enableOpenGL(bool use_opengl) +{ + if (m_use_opengl == use_opengl) + return; + + if (!glw && use_opengl) { + glw = new GLWidget(this); + glw->setAutoFillBackground(false); + glw->disableAutoBufferSwap(); + QApplication::postEvent(this, new QResizeEvent(size(), size())); + } + + m_use_opengl = use_opengl; + if (use_opengl) { + glw->show(); + } else { + if (glw) + glw->hide(); + } + + update(); +} +#endif + +void ArthurFrame::paintEvent(QPaintEvent *e) +{ + static QImage *static_image = 0; + QPainter painter; + if (preferImage() +#ifdef QT_OPENGL_SUPPORT + && !m_use_opengl +#endif + ) { + if (!static_image || static_image->size() != size()) { + delete static_image; + static_image = new QImage(size(), QImage::Format_RGB32); + } + painter.begin(static_image); + + int o = 10; + + QBrush bg = palette().brush(QPalette::Background); + painter.fillRect(0, 0, o, o, bg); + painter.fillRect(width() - o, 0, o, o, bg); + painter.fillRect(0, height() - o, o, o, bg); + painter.fillRect(width() - o, height() - o, o, o, bg); + } else { +#ifdef QT_OPENGL_SUPPORT + if (m_use_opengl) { + painter.begin(glw); + painter.fillRect(QRectF(0, 0, glw->width(), glw->height()), palette().color(backgroundRole())); + } else { + painter.begin(this); + } +#else + painter.begin(this); +#endif + } + + painter.setClipRect(e->rect()); + + painter.setRenderHint(QPainter::Antialiasing); + + QPainterPath clipPath; + + QRect r = rect(); + qreal left = r.x() + 1; + qreal top = r.y() + 1; + qreal right = r.right(); + qreal bottom = r.bottom(); + qreal radius2 = 8 * 2; + + clipPath.moveTo(right - radius2, top); + clipPath.arcTo(right - radius2, top, radius2, radius2, 90, -90); + clipPath.arcTo(right - radius2, bottom - radius2, radius2, radius2, 0, -90); + clipPath.arcTo(left, bottom - radius2, radius2, radius2, 270, -90); + clipPath.arcTo(left, top, radius2, radius2, 180, -90); + clipPath.closeSubpath(); + + painter.save(); + painter.setClipPath(clipPath, Qt::IntersectClip); + + painter.drawTiledPixmap(rect(), m_tile); + + // client painting + + paint(&painter); + + painter.restore(); + + painter.save(); + if (m_show_doc) + paintDescription(&painter); + painter.restore(); + + int level = 180; + painter.setPen(QPen(QColor(level, level, level), 2)); + painter.setBrush(Qt::NoBrush); + painter.drawPath(clipPath); + + if (preferImage() +#ifdef QT_OPENGL_SUPPORT + && !m_use_opengl +#endif + ) { + painter.end(); + painter.begin(this); + painter.drawImage(e->rect(), *static_image, e->rect()); + } + +#ifdef QT_OPENGL_SUPPORT + if (m_use_opengl && (inherits("PathDeformRenderer") || inherits("PathStrokeRenderer") || inherits("CompositionRenderer") || m_show_doc)) + glw->swapBuffers(); +#endif +} + +void ArthurFrame::resizeEvent(QResizeEvent *e) +{ +#ifdef QT_OPENGL_SUPPORT + if (glw) + glw->setGeometry(0, 0, e->size().width()-1, e->size().height()-1); +#endif + QWidget::resizeEvent(e); +} + +void ArthurFrame::setDescriptionEnabled(bool enabled) +{ + if (m_show_doc != enabled) { + m_show_doc = enabled; + emit descriptionEnabledChanged(m_show_doc); + update(); + } +} + +void ArthurFrame::loadDescription(const QString &fileName) +{ + QFile textFile(fileName); + QString text; + if (!textFile.open(QFile::ReadOnly)) + text = QString("Unable to load resource file: '%1'").arg(fileName); + else + text = textFile.readAll(); + setDescription(text); +} + + +void ArthurFrame::setDescription(const QString &text) +{ + m_document = new QTextDocument(this); + m_document->setHtml(text); +} + +void ArthurFrame::paintDescription(QPainter *painter) +{ + if (!m_document) + return; + + int pageWidth = qMax(width() - 100, 100); + int pageHeight = qMax(height() - 100, 100); + if (pageWidth != m_document->pageSize().width()) { + m_document->setPageSize(QSize(pageWidth, pageHeight)); + } + + QRect textRect(width() / 2 - pageWidth / 2, + height() / 2 - pageHeight / 2, + pageWidth, + pageHeight); + int pad = 10; + QRect clearRect = textRect.adjusted(-pad, -pad, pad, pad); + painter->setPen(Qt::NoPen); + painter->setBrush(QColor(0, 0, 0, 63)); + int shade = 10; + painter->drawRect(clearRect.x() + clearRect.width() + 1, + clearRect.y() + shade, + shade, + clearRect.height() + 1); + painter->drawRect(clearRect.x() + shade, + clearRect.y() + clearRect.height() + 1, + clearRect.width() - shade + 1, + shade); + + painter->setRenderHint(QPainter::Antialiasing, false); + painter->setBrush(QColor(255, 255, 255, 220)); + painter->setPen(Qt::black); + painter->drawRect(clearRect); + + painter->setClipRegion(textRect, Qt::IntersectClip); + painter->translate(textRect.topLeft()); + + QAbstractTextDocumentLayout::PaintContext ctx; + + QLinearGradient g(0, 0, 0, textRect.height()); + g.setColorAt(0, Qt::black); + g.setColorAt(0.9, Qt::black); + g.setColorAt(1, Qt::transparent); + + QPalette pal = palette(); + pal.setBrush(QPalette::Text, g); + + ctx.palette = pal; + ctx.clip = QRect(0, 0, textRect.width(), textRect.height()); + m_document->documentLayout()->draw(painter, ctx); +} + +void ArthurFrame::loadSourceFile(const QString &sourceFile) +{ + m_sourceFileName = sourceFile; +} + +void ArthurFrame::showSource() +{ + // Check for existing source + if (findChild<QTextBrowser *>()) + return; + + QString contents; + if (m_sourceFileName.isEmpty()) { + contents = QString("No source for widget: '%1'").arg(objectName()); + } else { + QFile f(m_sourceFileName); + if (!f.open(QFile::ReadOnly)) + contents = QString("Could not open file: '%1'").arg(m_sourceFileName); + else + contents = f.readAll(); + } + + contents.replace('&', "&"); + contents.replace('<', "<"); + contents.replace('>', ">"); + + QStringList keywords; + keywords << "for " << "if " << "switch " << " int " << "#include " << "const" + << "void " << "uint " << "case " << "double " << "#define " << "static" + << "new" << "this"; + + foreach (QString keyword, keywords) + contents.replace(keyword, QLatin1String("<font color=olive>") + keyword + QLatin1String("</font>")); + contents.replace("(int ", "(<font color=olive><b>int </b></font>"); + + QStringList ppKeywords; + ppKeywords << "#ifdef" << "#ifndef" << "#if" << "#endif" << "#else"; + + foreach (QString keyword, ppKeywords) + contents.replace(keyword, QLatin1String("<font color=navy>") + keyword + QLatin1String("</font>")); + + contents.replace(QRegExp("(\\d\\d?)"), QLatin1String("<font color=navy>\\1</font>")); + + QRegExp commentRe("(//.+)\\n"); + commentRe.setMinimal(true); + contents.replace(commentRe, QLatin1String("<font color=red>\\1</font>\n")); + + QRegExp stringLiteralRe("(\".+\")"); + stringLiteralRe.setMinimal(true); + contents.replace(stringLiteralRe, QLatin1String("<font color=green>\\1</font>")); + + QString html = contents; + html.prepend("<html><pre>"); + html.append("</pre></html>"); + + QTextBrowser *sourceViewer = new QTextBrowser(0); + sourceViewer->setWindowTitle("Source: " + m_sourceFileName.mid(5)); + sourceViewer->setParent(this, Qt::Dialog); + sourceViewer->setAttribute(Qt::WA_DeleteOnClose); + sourceViewer->setLineWrapMode(QTextEdit::NoWrap); + sourceViewer->setHtml(html); + sourceViewer->resize(600, 600); + sourceViewer->show(); +} |