Long live Qt 4.5!

6 files changed, 921 insertions, 0 deletions

diff --git a/demos/deform/deform.pro b/demos/deform/deform.pro
new file mode 100644
index 0000000..db8484d
--- /dev/null
+++ b/demos/deform/deform.pro
@@ -0,0 +1,19 @@
+SOURCES += main.cpp pathdeform.cpp
+HEADERS += pathdeform.h
+
+SHARED_FOLDER = ../shared
+
+include($$SHARED_FOLDER/shared.pri)
+
+RESOURCES += deform.qrc
+
+contains(QT_CONFIG, opengl) {
+	DEFINES += QT_OPENGL_SUPPORT
+	QT += opengl
+}
+
+# install
+target.path = $$[QT_INSTALL_DEMOS]/deform
+sources.files = $$SOURCES $$HEADERS $$RESOURCES *.pro *.html
+sources.path = $$[QT_INSTALL_DEMOS]/deform
+INSTALLS += target sources
diff --git a/demos/deform/deform.qrc b/demos/deform/deform.qrc
new file mode 100644
index 0000000..2e59ebc
--- /dev/null
+++ b/demos/deform/deform.qrc
@@ -0,0 +1,6 @@
+<!DOCTYPE RCC><RCC version="1.0">
+<qresource prefix="/res/deform">
+   <file>pathdeform.cpp</file>
+   <file>pathdeform.html</file>
+</qresource>
+</RCC>
diff --git a/demos/deform/main.cpp b/demos/deform/main.cpp
new file mode 100644
index 0000000..e32fa12
--- /dev/null
+++ b/demos/deform/main.cpp
@@ -0,0 +1,72 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration 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 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 "pathdeform.h"
+
+#include <QApplication>
+#include <QDebug>
+
+int main(int argc, char **argv)
+{
+    Q_INIT_RESOURCE(deform);
+
+    QApplication app(argc, argv);
+
+    bool smallScreen = false;
+    for (int i=0; i<argc; i++)
+        if (QString(argv[i]) == "-small-screen")
+            smallScreen = true;
+
+    PathDeformWidget deformWidget(0, smallScreen);
+
+    QStyle *arthurStyle = new ArthurStyle();
+    deformWidget.setStyle(arthurStyle);
+    QList<QWidget *> widgets = qFindChildren<QWidget *>(&deformWidget);
+    foreach (QWidget *w, widgets)
+        w->setStyle(arthurStyle);
+
+    if (smallScreen)
+        deformWidget.showFullScreen();
+    else
+        deformWidget.show();
+
+    return app.exec();
+}
diff --git a/demos/deform/pathdeform.cpp b/demos/deform/pathdeform.cpp
new file mode 100644
index 0000000..2e1d89a
--- /dev/null
+++ b/demos/deform/pathdeform.cpp
@@ -0,0 +1,647 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration 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 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 "pathdeform.h"
+
+#include <QApplication>
+#include <QtDebug>
+#include <QMouseEvent>
+#include <QTimerEvent>
+#include <QLayout>
+#include <QLineEdit>
+#include <QPainter>
+#include <QSlider>
+#include <QLabel>
+#include <QDesktopWidget>
+#include <qmath.h>
+
+
+PathDeformControls::PathDeformControls(QWidget *parent, PathDeformRenderer* renderer, bool smallScreen)
+      : QWidget(parent)
+{
+    m_renderer = renderer;
+
+    if (smallScreen)
+        layoutForSmallScreen();
+    else
+        layoutForDesktop();
+}
+
+
+void PathDeformControls::layoutForDesktop()
+{
+    QGroupBox* mainGroup = new QGroupBox(this);
+    mainGroup->setTitle(tr("Controls"));
+
+    QGroupBox *radiusGroup = new QGroupBox(mainGroup);
+    radiusGroup->setTitle(tr("Lens Radius"));
+    QSlider *radiusSlider = new QSlider(Qt::Horizontal, radiusGroup);
+    radiusSlider->setRange(15, 150);
+    radiusSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+    QGroupBox *deformGroup = new QGroupBox(mainGroup);
+    deformGroup->setTitle(tr("Deformation"));
+    QSlider *deformSlider = new QSlider(Qt::Horizontal, deformGroup);
+    deformSlider->setRange(-100, 100);
+    deformSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+    QGroupBox *fontSizeGroup = new QGroupBox(mainGroup);
+    fontSizeGroup->setTitle(tr("Font Size"));
+    QSlider *fontSizeSlider = new QSlider(Qt::Horizontal, fontSizeGroup);
+    fontSizeSlider->setRange(16, 200);
+    fontSizeSlider->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
+
+    QGroupBox *textGroup = new QGroupBox(mainGroup);
+    textGroup->setTitle(tr("Text"));
+    QLineEdit *textInput = new QLineEdit(textGroup);
+
+    QPushButton *animateButton = new QPushButton(mainGroup);
+    animateButton->setText(tr("Animated"));
+    animateButton->setCheckable(true);
+
+    QPushButton *showSourceButton = new QPushButton(mainGroup);
+    showSourceButton->setText(tr("Show Source"));
+
+#ifdef QT_OPENGL_SUPPORT
+    QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
+    enableOpenGLButton->setText(tr("Use OpenGL"));
+    enableOpenGLButton->setCheckable(true);
+    enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
+    if (!QGLFormat::hasOpenGL())
+        enableOpenGLButton->hide();
+#endif
+
+    QPushButton *whatsThisButton = new QPushButton(mainGroup);
+    whatsThisButton->setText(tr("What's This?"));
+    whatsThisButton->setCheckable(true);
+
+
+    mainGroup->setFixedWidth(180);
+
+    QVBoxLayout *mainGroupLayout = new QVBoxLayout(mainGroup);
+    mainGroupLayout->addWidget(radiusGroup);
+    mainGroupLayout->addWidget(deformGroup);
+    mainGroupLayout->addWidget(fontSizeGroup);
+    mainGroupLayout->addWidget(textGroup);
+    mainGroupLayout->addWidget(animateButton);
+    mainGroupLayout->addStretch(1);
+#ifdef QT_OPENGL_SUPPORT
+    mainGroupLayout->addWidget(enableOpenGLButton);
+#endif
+    mainGroupLayout->addWidget(showSourceButton);
+    mainGroupLayout->addWidget(whatsThisButton);
+
+    QVBoxLayout *radiusGroupLayout = new QVBoxLayout(radiusGroup);
+    radiusGroupLayout->addWidget(radiusSlider);
+
+    QVBoxLayout *deformGroupLayout = new QVBoxLayout(deformGroup);
+    deformGroupLayout->addWidget(deformSlider);
+
+    QVBoxLayout *fontSizeGroupLayout = new QVBoxLayout(fontSizeGroup);
+    fontSizeGroupLayout->addWidget(fontSizeSlider);
+
+    QVBoxLayout *textGroupLayout = new QVBoxLayout(textGroup);
+    textGroupLayout->addWidget(textInput);
+
+    QVBoxLayout * mainLayout = new QVBoxLayout(this);
+    mainLayout->addWidget(mainGroup);
+    mainLayout->setMargin(0);
+
+    connect(radiusSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setRadius(int)));
+    connect(deformSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setIntensity(int)));
+    connect(fontSizeSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setFontSize(int)));
+    connect(animateButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setAnimated(bool)));
+#ifdef QT_OPENGL_SUPPORT
+    connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
+#endif
+
+    connect(textInput, SIGNAL(textChanged(QString)), m_renderer, SLOT(setText(QString)));
+    connect(m_renderer, SIGNAL(descriptionEnabledChanged(bool)),
+            whatsThisButton, SLOT(setChecked(bool)));
+    connect(whatsThisButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setDescriptionEnabled(bool)));
+    connect(showSourceButton, SIGNAL(clicked()), m_renderer, SLOT(showSource()));
+
+    animateButton->animateClick();
+    deformSlider->setValue(80);
+    fontSizeSlider->setValue(120);
+    radiusSlider->setValue(100);
+    textInput->setText(tr("Qt"));
+}
+
+void PathDeformControls::layoutForSmallScreen()
+{
+    QGroupBox* mainGroup = new QGroupBox(this);
+    mainGroup->setTitle(tr("Controls"));
+
+    QLabel *radiusLabel = new QLabel(mainGroup);
+    radiusLabel->setText(tr("Lens Radius:"));
+    QSlider *radiusSlider = new QSlider(Qt::Horizontal, mainGroup);
+    radiusSlider->setRange(15, 150);
+    radiusSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+    QLabel *deformLabel = new QLabel(mainGroup);
+    deformLabel->setText(tr("Deformation:"));
+    QSlider *deformSlider = new QSlider(Qt::Horizontal, mainGroup);
+    deformSlider->setRange(-100, 100);
+    deformSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+    QLabel *fontSizeLabel = new QLabel(mainGroup);
+    fontSizeLabel->setText(tr("Font Size:"));
+    QSlider *fontSizeSlider = new QSlider(Qt::Horizontal, mainGroup);
+    fontSizeSlider->setRange(16, 200);
+    fontSizeSlider->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Fixed);
+
+    QPushButton *animateButton = new QPushButton(tr("Animated"), mainGroup);
+    animateButton->setCheckable(true);
+
+#ifdef QT_OPENGL_SUPPORT
+    QPushButton *enableOpenGLButton = new QPushButton(mainGroup);
+    enableOpenGLButton->setText(tr("Use OpenGL"));
+    enableOpenGLButton->setCheckable(mainGroup);
+    enableOpenGLButton->setChecked(m_renderer->usesOpenGL());
+    if (!QGLFormat::hasOpenGL())
+        enableOpenGLButton->hide();
+#endif
+
+    QPushButton *quitButton = new QPushButton(tr("Quit"), mainGroup);
+    QPushButton *okButton = new QPushButton(tr("OK"), mainGroup);
+
+
+    QGridLayout *mainGroupLayout = new QGridLayout(mainGroup);
+    mainGroupLayout->setMargin(0);
+    mainGroupLayout->addWidget(radiusLabel, 0, 0, Qt::AlignRight);
+    mainGroupLayout->addWidget(radiusSlider, 0, 1);
+    mainGroupLayout->addWidget(deformLabel, 1, 0, Qt::AlignRight);
+    mainGroupLayout->addWidget(deformSlider, 1, 1);
+    mainGroupLayout->addWidget(fontSizeLabel, 2, 0, Qt::AlignRight);
+    mainGroupLayout->addWidget(fontSizeSlider, 2, 1);
+    mainGroupLayout->addWidget(animateButton, 3,0, 1,2);
+#ifdef QT_OPENGL_SUPPORT
+    mainGroupLayout->addWidget(enableOpenGLButton, 4,0, 1,2);
+#endif
+
+    QVBoxLayout *mainLayout = new QVBoxLayout(this);
+    mainLayout->addWidget(mainGroup);
+    mainLayout->addStretch(1);
+    mainLayout->addWidget(okButton);
+    mainLayout->addWidget(quitButton);
+
+    connect(quitButton, SIGNAL(clicked()), this, SLOT(emitQuitSignal()));
+    connect(okButton, SIGNAL(clicked()), this, SLOT(emitOkSignal()));
+    connect(radiusSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setRadius(int)));
+    connect(deformSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setIntensity(int)));
+    connect(fontSizeSlider, SIGNAL(valueChanged(int)), m_renderer, SLOT(setFontSize(int)));
+    connect(animateButton, SIGNAL(clicked(bool)), m_renderer, SLOT(setAnimated(bool)));
+#ifdef QT_OPENGL_SUPPORT
+    connect(enableOpenGLButton, SIGNAL(clicked(bool)), m_renderer, SLOT(enableOpenGL(bool)));
+#endif
+
+
+    animateButton->animateClick();
+    deformSlider->setValue(80);
+    fontSizeSlider->setValue(120);
+
+    QRect screen_size = QApplication::desktop()->screenGeometry();
+    radiusSlider->setValue(qMin(screen_size.width(), screen_size.height())/5);
+    m_renderer->setText(tr("Qt"));
+}
+
+
+void PathDeformControls::emitQuitSignal()
+{   emit quitPressed();  }
+
+void PathDeformControls::emitOkSignal()
+{   emit okPressed();   }
+
+
+PathDeformWidget::PathDeformWidget(QWidget *parent, bool smallScreen)
+    : QWidget(parent)
+{
+    setWindowTitle(tr("Vector Deformation"));
+
+    m_renderer = new PathDeformRenderer(this, smallScreen);
+    m_renderer->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
+
+    // Layouts
+    QHBoxLayout *mainLayout = new QHBoxLayout(this);
+    mainLayout->addWidget(m_renderer);
+
+    m_controls = new PathDeformControls(0, m_renderer, smallScreen);
+    m_controls->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Minimum);
+
+    if (!smallScreen)
+        mainLayout->addWidget(m_controls);
+
+    m_renderer->loadSourceFile(":res/deform/pathdeform.cpp");
+    m_renderer->loadDescription(":res/deform/pathdeform.html");
+    m_renderer->setDescriptionEnabled(false);
+
+    connect(m_renderer, SIGNAL(clicked()), this, SLOT(showControls()));
+    connect(m_controls, SIGNAL(okPressed()), this, SLOT(hideControls()));
+    connect(m_controls, SIGNAL(quitPressed()), QApplication::instance(), SLOT(quit()));
+}
+
+
+void PathDeformWidget::showControls()
+{
+    m_controls->showFullScreen();
+}
+
+void PathDeformWidget::hideControls()
+{
+    m_controls->hide();
+}
+
+void PathDeformWidget::setStyle( QStyle * style )
+{
+    QWidget::setStyle(style);
+    if (m_controls != 0)
+    {
+        m_controls->setStyle(style);
+        
+        QList<QWidget *> widgets = qFindChildren<QWidget *>(m_controls);
+        foreach (QWidget *w, widgets)
+            w->setStyle(style);
+    }
+}
+
+static inline QRect circle_bounds(const QPointF &center, qreal radius, qreal compensation)
+{
+    return QRect(qRound(center.x() - radius - compensation),
+                 qRound(center.y() - radius - compensation),
+                 qRound((radius + compensation) * 2),
+                 qRound((radius + compensation) * 2));
+
+}
+
+const int LENS_EXTENT = 10;
+
+PathDeformRenderer::PathDeformRenderer(QWidget *widget, bool smallScreen)
+    : ArthurFrame(widget)
+{
+    m_radius = 100;
+    m_pos = QPointF(m_radius, m_radius);
+    m_direction = QPointF(1, 1);
+    m_fontSize = 24;
+    m_animated = true;
+    m_repaintTimer.start(25, this);
+    m_repaintTracker.start();
+    m_intensity = 100;
+    m_smallScreen = smallScreen;
+
+//     m_fpsTimer.start(1000, this);
+//     m_fpsCounter = 0;
+
+    generateLensPixmap();
+}
+
+void PathDeformRenderer::setText(const QString &text)
+{
+    m_text = text;
+
+    QFont f("times new roman,utopia");
+    f.setStyleStrategy(QFont::ForceOutline);
+    f.setPointSize(m_fontSize);
+    f.setStyleHint(QFont::Times);
+
+    QFontMetrics fm(f);
+
+    m_paths.clear();
+    m_pathBounds = QRect();
+
+    QPointF advance(0, 0);
+
+    bool do_quick = true;
+    for (int i=0; i<text.size(); ++i) {
+        if (text.at(i).unicode() >= 0x4ff && text.at(i).unicode() <= 0x1e00) {
+            do_quick = false;
+            break;
+        }
+    }
+
+    if (do_quick) {
+        for (int i=0; i<text.size(); ++i) {
+            QPainterPath path;
+            path.addText(advance, f, text.mid(i, 1));
+            m_pathBounds |= path.boundingRect();
+            m_paths << path;
+            advance += QPointF(fm.width(text.mid(i, 1)), 0);
+        }
+    } else {
+        QPainterPath path;
+        path.addText(advance, f, text);
+        m_pathBounds |= path.boundingRect();
+        m_paths << path;
+    }
+
+    for (int i=0; i<m_paths.size(); ++i)
+        m_paths[i] = m_paths[i] * QMatrix(1, 0, 0, 1, -m_pathBounds.x(), -m_pathBounds.y());
+
+    update();
+}
+
+
+void PathDeformRenderer::generateLensPixmap()
+{
+    qreal rad = m_radius + LENS_EXTENT;
+
+    QRect bounds = circle_bounds(QPointF(), rad, 0);
+
+    QPainter painter;
+
+    if (preferImage()) {
+        m_lens_image = QImage(bounds.size(), QImage::Format_ARGB32_Premultiplied);
+        m_lens_image.fill(0);
+        painter.begin(&m_lens_image);
+    } else {
+        m_lens_pixmap = QPixmap(bounds.size());
+        m_lens_pixmap.fill(Qt::transparent);
+        painter.begin(&m_lens_pixmap);
+    }
+
+    QRadialGradient gr(rad, rad, rad, 3 * rad / 5, 3 * rad / 5);
+    gr.setColorAt(0.0, QColor(255, 255, 255, 191));
+    gr.setColorAt(0.2, QColor(255, 255, 127, 191));
+    gr.setColorAt(0.9, QColor(150, 150, 200, 63));
+    gr.setColorAt(0.95, QColor(0, 0, 0, 127));
+    gr.setColorAt(1, QColor(0, 0, 0, 0));
+    painter.setRenderHint(QPainter::Antialiasing);
+    painter.setBrush(gr);
+    painter.setPen(Qt::NoPen);
+    painter.drawEllipse(0, 0, bounds.width(), bounds.height());
+}
+
+
+void PathDeformRenderer::setAnimated(bool animated)
+{
+    m_animated = animated;
+
+    if (m_animated) {
+//         m_fpsTimer.start(1000, this);
+//         m_fpsCounter = 0;
+        m_repaintTimer.start(25, this);
+        m_repaintTracker.start();
+    } else {
+//         m_fpsTimer.stop();
+        m_repaintTimer.stop();
+    }
+}
+
+void PathDeformRenderer::timerEvent(QTimerEvent *e)
+{
+
+    if (e->timerId() == m_repaintTimer.timerId()) {
+
+        if (QLineF(QPointF(0,0), m_direction).length() > 1)
+            m_direction *= 0.995;
+        qreal time = m_repaintTracker.restart();
+
+        QRect rectBefore = circle_bounds(m_pos, m_radius, m_fontSize);
+
+        qreal dx = m_direction.x();
+        qreal dy = m_direction.y();
+        if (time > 0) {
+            dx = dx * time * .1;
+            dy = dy * time * .1;
+        }
+
+        m_pos += QPointF(dx, dy);
+
+
+
+        if (m_pos.x() - m_radius < 0) {
+            m_direction.setX(-m_direction.x());
+            m_pos.setX(m_radius);
+        } else if (m_pos.x() + m_radius > width()) {
+            m_direction.setX(-m_direction.x());
+            m_pos.setX(width() - m_radius);
+        }
+
+        if (m_pos.y() - m_radius < 0) {
+            m_direction.setY(-m_direction.y());
+            m_pos.setY(m_radius);
+        } else if (m_pos.y() + m_radius > height()) {
+            m_direction.setY(-m_direction.y());
+            m_pos.setY(height() - m_radius);
+        }
+
+#ifdef QT_OPENGL_SUPPORT
+        if (usesOpenGL()) {
+            update();
+        } else
+#endif
+        {
+            QRect rectAfter = circle_bounds(m_pos, m_radius, m_fontSize);
+            update(rectAfter | rectBefore);
+            QApplication::syncX();
+        }
+    }
+//     else if (e->timerId() == m_fpsTimer.timerId()) {
+//         printf("fps: %d\n", m_fpsCounter);
+//         emit frameRate(m_fpsCounter);
+//         m_fpsCounter = 0;
+
+//     }
+}
+
+void PathDeformRenderer::mousePressEvent(QMouseEvent *e)
+{
+    setDescriptionEnabled(false);
+
+    m_repaintTimer.stop();
+    m_offset = QPointF();
+    if (QLineF(m_pos, e->pos()).length() <= m_radius)
+        m_offset = m_pos - e->pos();
+
+    m_mousePress = e->pos();
+    
+    // If we're not running in small screen mode, always assume we're dragging
+    m_mouseDrag = !m_smallScreen;
+
+    mouseMoveEvent(e);
+}
+
+void PathDeformRenderer::mouseReleaseEvent(QMouseEvent *e)
+{
+    if (e->buttons() == Qt::NoButton && m_animated) {
+        m_repaintTimer.start(10, this);
+        m_repaintTracker.start();
+    }
+
+    if (!m_mouseDrag && m_smallScreen)
+        emit clicked();
+}
+
+void PathDeformRenderer::mouseMoveEvent(QMouseEvent *e)
+{
+    if (!m_mouseDrag && (QLineF(m_mousePress, e->pos()).length() > 25.0) )
+        m_mouseDrag = true;
+
+    if (m_mouseDrag) {
+        QRect rectBefore = circle_bounds(m_pos, m_radius, m_fontSize);
+        if (e->type() == QEvent::MouseMove) {
+            QLineF line(m_pos, e->pos() + m_offset);
+            line.setLength(line.length() * .1);
+            QPointF dir(line.dx(), line.dy());
+            m_direction = (m_direction + dir) / 2;
+        }
+        m_pos = e->pos() + m_offset;
+#ifdef QT_OPENGL_SUPPORT
+        if (usesOpenGL()) {
+            update();
+        } else
+#endif
+        {
+            QRect rectAfter = circle_bounds(m_pos, m_radius, m_fontSize);
+            update(rectBefore | rectAfter);
+        }
+    }
+}
+
+QPainterPath PathDeformRenderer::lensDeform(const QPainterPath &source, const QPointF &offset)
+{
+    QPainterPath path;
+    path.addPath(source);
+
+    qreal flip = m_intensity / qreal(100);
+
+    for (int i=0; i<path.elementCount(); ++i) {
+        const QPainterPath::Element &e = path.elementAt(i);
+
+        qreal x = e.x + offset.x();
+        qreal y = e.y + offset.y();
+
+        qreal dx = x - m_pos.x();
+        qreal dy = y - m_pos.y();
+        qreal len = m_radius - qSqrt(dx * dx + dy * dy);
+
+        if (len > 0) {
+            path.setElementPositionAt(i,
+                                      x + flip * dx * len / m_radius,
+                                      y + flip * dy * len / m_radius);
+        } else {
+            path.setElementPositionAt(i, x, y);
+        }
+
+    }
+
+    return path;
+}
+
+
+void PathDeformRenderer::paint(QPainter *painter)
+{
+    int pad_x = 5;
+    int pad_y = 5;
+
+    int skip_x = qRound(m_pathBounds.width() + pad_x + m_fontSize/2);
+    int skip_y = qRound(m_pathBounds.height() + pad_y);
+
+    painter->setPen(Qt::NoPen);
+    painter->setBrush(Qt::black);
+
+    QRectF clip(painter->clipPath().boundingRect());
+
+    int overlap = pad_x / 2;
+
+    for (int start_y=0; start_y < height(); start_y += skip_y) {
+
+        if (start_y > clip.bottom())
+            break;
+
+        int start_x = -overlap;
+        for (; start_x < width(); start_x += skip_x) {
+
+            if (start_y + skip_y >= clip.top() &&
+                start_x + skip_x >= clip.left() &&
+                start_x <= clip.right()) {
+                for (int i=0; i<m_paths.size(); ++i) {
+                    QPainterPath path = lensDeform(m_paths[i], QPointF(start_x, start_y));
+                    painter->drawPath(path);
+                }
+            }
+        }
+        overlap = skip_x - (start_x - width());
+
+    }
+
+    if (preferImage()) {
+        painter->drawImage(m_pos - QPointF(m_radius + LENS_EXTENT, m_radius + LENS_EXTENT),
+                           m_lens_image);
+    } else {
+        painter->drawPixmap(m_pos - QPointF(m_radius + LENS_EXTENT, m_radius + LENS_EXTENT),
+                            m_lens_pixmap);
+    }
+}
+
+
+
+void PathDeformRenderer::setRadius(int radius)
+{
+    qreal max = qMax(m_radius, (qreal)radius);
+    m_radius = radius;
+    generateLensPixmap();
+    if (!m_animated || m_radius < max) {
+#ifdef QT_OPENGL_SUPPORT
+        if (usesOpenGL()) {
+            update();
+        } else
+#endif
+        {
+            update(circle_bounds(m_pos, max, m_fontSize));
+        }
+    }
+}
+
+void PathDeformRenderer::setIntensity(int intensity)
+{
+    m_intensity = intensity;
+    if (!m_animated) {
+#ifdef QT_OPENGL_SUPPORT
+        if (usesOpenGL()) {
+            update();
+        } else
+#endif
+        {
+            update(circle_bounds(m_pos, m_radius, m_fontSize));
+        }
+    }
+}
diff --git a/demos/deform/pathdeform.h b/demos/deform/pathdeform.h
new file mode 100644
index 0000000..45edb26
--- /dev/null
+++ b/demos/deform/pathdeform.h
@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the demonstration 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 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.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef PATHDEFORM_H
+#define PATHDEFORM_H
+
+#include "arthurwidgets.h"
+
+#include <QPainterPath>
+#include <QBasicTimer>
+#include <QDateTime>
+
+class PathDeformRenderer : public ArthurFrame
+{
+    Q_OBJECT
+    Q_PROPERTY(bool animated READ animated WRITE setAnimated)
+    Q_PROPERTY(int radius READ radius WRITE setRadius)
+    Q_PROPERTY(int fontSize READ fontSize WRITE setFontSize)
+    Q_PROPERTY(int intensity READ intensity WRITE setIntensity)
+    Q_PROPERTY(QString text READ text WRITE setText)
+
+public:
+    PathDeformRenderer(QWidget *widget, bool smallScreen = false);
+
+    void paint(QPainter *painter);
+
+    void mousePressEvent(QMouseEvent *e);
+    void mouseReleaseEvent(QMouseEvent *e);
+    void mouseMoveEvent(QMouseEvent *e);
+    void timerEvent(QTimerEvent *e);
+
+    QSize sizeHint() const { return QSize(600, 500); }
+
+    bool animated() const { return m_animated; }
+    int radius() const { return int(m_radius); }
+    int fontSize() const { return m_fontSize; }
+    int intensity() const { return int(m_intensity); }
+    QString text() const { return m_text; }
+
+public slots:
+    void setRadius(int radius);
+    void setFontSize(int fontSize) { m_fontSize = fontSize; setText(m_text); }
+    void setText(const QString &text);
+    void setIntensity(int intensity);
+
+    void setAnimated(bool animated);
+
+signals:
+    void clicked();
+//     void frameRate(double fps);
+
+private:
+    void generateLensPixmap();
+    QPainterPath lensDeform(const QPainterPath &source, const QPointF &offset);
+
+    QBasicTimer m_repaintTimer;
+//     QBasicTimer m_fpsTimer;
+//     int m_fpsCounter;
+    QTime m_repaintTracker;
+
+    QVector<QPainterPath> m_paths;
+    QVector<QPointF> m_advances;
+    QRectF m_pathBounds;
+    QString m_text;
+
+    QPixmap m_lens_pixmap;
+    QImage m_lens_image;
+
+    int m_fontSize;
+    bool m_animated;
+
+    qreal m_intensity;
+    qreal m_radius;
+    QPointF m_pos;
+    QPointF m_offset;
+    QPointF m_direction;
+    QPointF m_mousePress;
+    bool    m_mouseDrag;
+    bool    m_smallScreen;
+};
+
+class PathDeformControls : public QWidget
+{
+    Q_OBJECT
+public:
+    PathDeformControls(QWidget *parent, PathDeformRenderer* renderer, bool smallScreen);
+signals:
+    void okPressed();
+    void quitPressed();
+private:
+    PathDeformRenderer* m_renderer;
+    void layoutForDesktop();
+    void layoutForSmallScreen();
+private slots:
+    void emitQuitSignal();
+    void emitOkSignal();
+};
+
+class PathDeformWidget : public QWidget
+{
+    Q_OBJECT
+public:
+    PathDeformWidget(QWidget *parent, bool smallScreen);
+    void setStyle ( QStyle * style );
+
+private:
+    PathDeformRenderer *m_renderer;
+    PathDeformControls *m_controls;
+
+private slots:
+    void showControls();
+    void hideControls();
+};
+
+#endif // PATHDEFORM_H
diff --git a/demos/deform/pathdeform.html b/demos/deform/pathdeform.html
new file mode 100644
index 0000000..b3f63a8
--- /dev/null
+++ b/demos/deform/pathdeform.html
@@ -0,0 +1,24 @@
+<html>
+<center>
+<h2>Vector deformation</h2>
+</center>
+
+<p>This demo shows how to use advanced vector techniques to draw text 
+using a <code>QPainterPath</code>.</p>
+
+<p>We define a vector deformation field in the shape of a lens and apply
+this to all points in a path. This means that what is rendered on
+screen is not pixel manipulation, but modified vector representations of
+the glyphs themselves. This is visible from the high quality of the
+antialiased edges for the deformed glyphs.</p>
+
+<p>To get a fairly complex path we allow the user to type in text and
+convert the text to paths. This is done using the
+<code>QPainterPath::addText()</code> function.</p>
+
+<p>The lens is drawn using a single call to <code>drawEllipse()</code>, using
+a <code>QRadialGradient</code> to fill it with a specialized color table,
+giving the effect of the Sun's reflection and a drop shadow. The lens
+is cached as a pixmap for better performance.</p>
+
+</html>