--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/multitouch/fingerpaint/scribblearea.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,212 @@
+/****************************************************************************
+**
+** 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 <QtGui>
+
+#include "scribblearea.h"
+
+//! [0]
+ScribbleArea::ScribbleArea(QWidget *parent)
+ : QWidget(parent)
+{
+ setAttribute(Qt::WA_AcceptTouchEvents);
+ setAttribute(Qt::WA_StaticContents);
+ modified = false;
+
+ myPenColors
+ << QColor("green")
+ << QColor("purple")
+ << QColor("red")
+ << QColor("blue")
+ << QColor("yellow")
+
+ << QColor("pink")
+ << QColor("orange")
+ << QColor("brown")
+ << QColor("grey")
+ << QColor("black");
+}
+//! [0]
+
+//! [1]
+bool ScribbleArea::openImage(const QString &fileName)
+//! [1] //! [2]
+{
+ QImage loadedImage;
+ if (!loadedImage.load(fileName))
+ return false;
+
+ QSize newSize = loadedImage.size().expandedTo(size());
+ resizeImage(&loadedImage, newSize);
+ image = loadedImage;
+ modified = false;
+ update();
+ return true;
+}
+//! [2]
+
+//! [3]
+bool ScribbleArea::saveImage(const QString &fileName, const char *fileFormat)
+//! [3] //! [4]
+{
+ QImage visibleImage = image;
+ resizeImage(&visibleImage, size());
+
+ if (visibleImage.save(fileName, fileFormat)) {
+ modified = false;
+ return true;
+ } else {
+ return false;
+ }
+}
+//! [4]
+
+//! [9]
+void ScribbleArea::clearImage()
+//! [9] //! [10]
+{
+ image.fill(qRgb(255, 255, 255));
+ modified = true;
+ update();
+}
+//! [10]
+
+//! [12] //! [13]
+void ScribbleArea::paintEvent(QPaintEvent *event)
+//! [13] //! [14]
+{
+ QPainter painter(this);
+ const QRect rect = event->rect();
+ painter.drawImage(rect.topLeft(), image, rect);
+}
+//! [14]
+
+//! [15]
+void ScribbleArea::resizeEvent(QResizeEvent *event)
+//! [15] //! [16]
+{
+ if (width() > image.width() || height() > image.height()) {
+ int newWidth = qMax(width() + 128, image.width());
+ int newHeight = qMax(height() + 128, image.height());
+ resizeImage(&image, QSize(newWidth, newHeight));
+ update();
+ }
+ QWidget::resizeEvent(event);
+}
+//! [16]
+
+//! [19]
+void ScribbleArea::resizeImage(QImage *image, const QSize &newSize)
+//! [19] //! [20]
+{
+ if (image->size() == newSize)
+ return;
+
+ QImage newImage(newSize, QImage::Format_RGB32);
+ newImage.fill(qRgb(255, 255, 255));
+ QPainter painter(&newImage);
+ painter.drawImage(QPoint(0, 0), *image);
+ *image = newImage;
+}
+//! [20]
+
+//! [21]
+void ScribbleArea::print()
+{
+#ifndef QT_NO_PRINTER
+ QPrinter printer(QPrinter::HighResolution);
+
+ QPrintDialog *printDialog = new QPrintDialog(&printer, this);
+//! [21] //! [22]
+ if (printDialog->exec() == QDialog::Accepted) {
+ QPainter painter(&printer);
+ QRect rect = painter.viewport();
+ QSize size = image.size();
+ size.scale(rect.size(), Qt::KeepAspectRatio);
+ painter.setViewport(rect.x(), rect.y(), size.width(), size.height());
+ painter.setWindow(image.rect());
+ painter.drawImage(0, 0, image);
+ }
+#endif // QT_NO_PRINTER
+}
+//! [22]
+
+bool ScribbleArea::event(QEvent *event)
+{
+ switch (event->type()) {
+ case QEvent::TouchBegin:
+ case QEvent::TouchUpdate:
+ case QEvent::TouchEnd:
+ {
+ QList<QTouchEvent::TouchPoint> touchPoints = static_cast<QTouchEvent *>(event)->touchPoints();
+ foreach (const QTouchEvent::TouchPoint &touchPoint, touchPoints) {
+ switch (touchPoint.state()) {
+ case Qt::TouchPointStationary:
+ // don't do anything if this touch point hasn't moved
+ continue;
+ default:
+ {
+ QRectF rect = touchPoint.rect();
+ if (rect.isEmpty()) {
+ qreal diameter = qreal(50) * touchPoint.pressure();
+ rect.setSize(QSizeF(diameter, diameter));
+ }
+
+ QPainter painter(&image);
+ painter.setPen(Qt::NoPen);
+ painter.setBrush(myPenColors.at(touchPoint.id() % myPenColors.count()));
+ painter.drawEllipse(rect);
+ painter.end();
+
+ modified = true;
+ int rad = 2;
+ update(rect.toRect().adjusted(-rad,-rad, +rad, +rad));
+ }
+ break;
+ }
+ }
+ break;
+ }
+ default:
+ return QWidget::event(event);
+ }
+ return true;
+}