diff -r 000000000000 -r 1918ee327afb examples/tools/plugandpaint/paintarea.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/tools/plugandpaint/paintarea.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,196 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples 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 "interfaces.h"
+#include "paintarea.h"
+
+#include <QPainter>
+#include <QMouseEvent>
+
+PaintArea::PaintArea(QWidget *parent) :
+    QWidget(parent),
+    theImage(500, 400, QImage::Format_RGB32),
+    color(Qt::blue),
+    thickness(3),
+    brushInterface(0),
+    lastPos(-1, -1)
+{
+    setAttribute(Qt::WA_StaticContents);
+    setAttribute(Qt::WA_NoBackground);
+
+    theImage.fill(qRgb(255, 255, 255));
+}
+
+bool PaintArea::openImage(const QString &fileName)
+{
+    QImage image;
+    if (!image.load(fileName))
+        return false;
+
+    setImage(image);
+    return true;
+}
+
+bool PaintArea::saveImage(const QString &fileName, const char *fileFormat)
+{
+    return theImage.save(fileName, fileFormat);
+}
+
+void PaintArea::setImage(const QImage &image)
+{
+    theImage = image.convertToFormat(QImage::Format_RGB32);
+    update();
+    updateGeometry();
+}
+
+void PaintArea::insertShape(const QPainterPath &path)
+{
+    pendingPath = path;
+#ifndef QT_NO_CURSOR
+    setCursor(Qt::CrossCursor);
+#endif
+}
+
+void PaintArea::setBrushColor(const QColor &color)
+{
+    this->color = color;
+}
+
+void PaintArea::setBrushWidth(int width)
+{
+    thickness = width;
+}
+
+//! [0]
+void PaintArea::setBrush(BrushInterface *brushInterface, const QString &brush)
+{
+    this->brushInterface = brushInterface;
+    this->brush = brush;
+}
+//! [0]
+
+QSize PaintArea::sizeHint() const
+{
+    return theImage.size();
+}
+
+void PaintArea::paintEvent(QPaintEvent * /* event */)
+{
+    QPainter painter(this);
+    painter.drawImage(QPoint(0, 0), theImage);
+}
+
+void PaintArea::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        if (!pendingPath.isEmpty()) {
+            QPainter painter(&theImage);
+            setupPainter(painter);
+
+            const QRectF boundingRect = pendingPath.boundingRect();
+            QLinearGradient gradient(boundingRect.topRight(),
+                                     boundingRect.bottomLeft());
+            gradient.setColorAt(0.0, QColor(color.red(), color.green(),
+                                            color.blue(), 63));
+            gradient.setColorAt(1.0, QColor(color.red(), color.green(),
+                                            color.blue(), 191));
+            painter.setBrush(gradient);
+            painter.translate(event->pos() - boundingRect.center());
+            painter.drawPath(pendingPath);
+
+            pendingPath = QPainterPath();
+#ifndef QT_NO_CURSOR
+            unsetCursor();
+#endif
+            update();
+        } else {
+            if (brushInterface) {
+                QPainter painter(&theImage);
+                setupPainter(painter);
+                const QRect rect = brushInterface->mousePress(brush, painter,
+                                                              event->pos());
+                update(rect);
+            }
+
+            lastPos = event->pos();
+        }
+    }
+}
+
+//! [1]
+void PaintArea::mouseMoveEvent(QMouseEvent *event)
+{
+    if ((event->buttons() & Qt::LeftButton) && lastPos != QPoint(-1, -1)) {
+        if (brushInterface) {
+            QPainter painter(&theImage);
+            setupPainter(painter);
+            const QRect rect = brushInterface->mouseMove(brush, painter, lastPos,
+                                                         event->pos());
+            update(rect);
+        }
+
+        lastPos = event->pos();
+    }
+}
+//! [1]
+
+void PaintArea::mouseReleaseEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton && lastPos != QPoint(-1, -1)) {
+        if (brushInterface) {
+            QPainter painter(&theImage);
+            setupPainter(painter);
+            QRect rect = brushInterface->mouseRelease(brush, painter,
+                                                      event->pos());
+            update(rect);
+        }
+
+        lastPos = QPoint(-1, -1);
+    }
+}
+
+void PaintArea::setupPainter(QPainter &painter)
+{
+    painter.setRenderHint(QPainter::Antialiasing, true);
+    painter.setPen(QPen(color, thickness, Qt::SolidLine, Qt::RoundCap,
+                   Qt::RoundJoin));
+}