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/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the examples of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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****************************************************************************/
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#include "scribblewidget.h"
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ScribbleWidget::ScribbleWidget(QWidget *parent)
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void ScribbleWidget::resizeEvent(QResizeEvent *e)
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image = QImage(e->size(), QImage::Format_RGB32);
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image.fill(QColor(Qt::white).rgb());
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void ScribbleWidget::mousePressEvent(QMouseEvent *event)
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if (event->button() != Qt::LeftButton)
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lastPoint = event->pos();
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void ScribbleWidget::mouseMoveEvent(QMouseEvent *event)
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if ((event->buttons() & Qt::LeftButton) && scribbling)
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drawLineTo(event->pos());
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void ScribbleWidget::mouseReleaseEvent(QMouseEvent *event)
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if (event->button() == Qt::LeftButton && scribbling) {
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drawLineTo(event->pos());
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void ScribbleWidget::paintEvent(QPaintEvent *)
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QPainter painter(this);
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painter.drawImage(QPoint(0, 0), image);
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void ScribbleWidget::drawLineTo(const QPoint &endPoint)
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QPainter painter(&image);
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painter.setPen(QPen(Qt::blue, 1, Qt::SolidLine,
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Qt::RoundCap, Qt::RoundJoin));
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painter.drawLine(lastPoint, endPoint);