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Diffstat (limited to 'examples/qws/mousecalibration/scribblewidget.cpp')
-rw-r--r-- | examples/qws/mousecalibration/scribblewidget.cpp | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/examples/qws/mousecalibration/scribblewidget.cpp b/examples/qws/mousecalibration/scribblewidget.cpp new file mode 100644 index 0000000000..cc24aeb3bf --- /dev/null +++ b/examples/qws/mousecalibration/scribblewidget.cpp @@ -0,0 +1,92 @@ +/**************************************************************************** +** +** Copyright (C) 2011 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. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor +** the names of its contributors may be used to endorse or promote +** products derived from this software without specific prior written +** permission. +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#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; +} |