qt5base-lts/examples/painting/shared/arthurwidgets.cpp
Friedemann Kleint e80b661952 Build fix for examples.
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

Change-Id: I36f5a4088a39673a8e74a4d53ac83a42696af096
Reviewed-on: http://codereview.qt.nokia.com/2095
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
2011-07-25 10:36:19 +02:00

365 lines
10 KiB
C++

/****************************************************************************
**
** 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 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)
{
m_use_opengl = use_opengl;
if (!glw) {
glw = new GLWidget(this);
glw->setAutoFillBackground(false);
glw->disableAutoBufferSwap();
QApplication::postEvent(this, new QResizeEvent(size(), size()));
}
if (use_opengl) {
glw->show();
} else {
glw->hide();
}
update();
}
#endif
void ArthurFrame::paintEvent(QPaintEvent *e)
{
#ifdef Q_WS_QWS
static QPixmap *static_image = 0;
#else
static QImage *static_image = 0;
#endif
QPainter painter;
if (preferImage()
#ifdef QT_OPENGL_SUPPORT
&& !m_use_opengl
#endif
) {
if (!static_image || static_image->size() != size()) {
delete static_image;
#ifdef Q_WS_QWS
static_image = new QPixmap(size());
#else
static_image = new QImage(size(), QImage::Format_RGB32);
#endif
}
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);
#ifdef Q_WS_QWS
painter.drawPixmap(e->rect(), *static_image, e->rect());
#else
painter.drawImage(e->rect(), *static_image, e->rect());
#endif
}
#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('&', "&amp;");
contents.replace('<', "&lt;");
contents.replace('>', "&gt;");
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();
}