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Diffstat (limited to 'examples/qws/mousecalibration/scribblewidget.cpp')
-rw-r--r-- | examples/qws/mousecalibration/scribblewidget.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/examples/qws/mousecalibration/scribblewidget.cpp b/examples/qws/mousecalibration/scribblewidget.cpp new file mode 100644 index 0000000..255afd0 --- /dev/null +++ b/examples/qws/mousecalibration/scribblewidget.cpp @@ -0,0 +1,93 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 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 "scribblewidget.h" + +ScribbleWidget::ScribbleWidget(QWidget *parent) + : QWidget(parent) +{ + scribbling = false; +} + +void ScribbleWidget::resizeEvent(QResizeEvent *e) +{ + image = QImage(e->size(), QImage::Format_RGB32); + image.fill(QColor(Qt::white).rgb()); +} + +void ScribbleWidget::mousePressEvent(QMouseEvent *event) +{ + if (event->button() != Qt::LeftButton) + return; + + lastPoint = event->pos(); + scribbling = true; +} + +void ScribbleWidget::mouseMoveEvent(QMouseEvent *event) +{ + if ((event->buttons() & Qt::LeftButton) && scribbling) + drawLineTo(event->pos()); +} + +void ScribbleWidget::mouseReleaseEvent(QMouseEvent *event) +{ + if (event->button() == Qt::LeftButton && scribbling) { + drawLineTo(event->pos()); + scribbling = false; + } +} + +void ScribbleWidget::paintEvent(QPaintEvent *) +{ + QPainter painter(this); + painter.drawImage(QPoint(0, 0), image); +} + +void ScribbleWidget::drawLineTo(const QPoint &endPoint) +{ + QPainter painter(&image); + painter.setPen(QPen(Qt::blue, 1, Qt::SolidLine, + Qt::RoundCap, Qt::RoundJoin)); + painter.drawLine(lastPoint, endPoint); + update(); + lastPoint = endPoint; +} |