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Diffstat (limited to 'tests/manual/xembed-raster/rasterwindow.cpp')
-rw-r--r-- | tests/manual/xembed-raster/rasterwindow.cpp | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/tests/manual/xembed-raster/rasterwindow.cpp b/tests/manual/xembed-raster/rasterwindow.cpp new file mode 100644 index 0000000000..cad5081280 --- /dev/null +++ b/tests/manual/xembed-raster/rasterwindow.cpp @@ -0,0 +1,107 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** 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 Digia Plc 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 "rasterwindow.h" + +RasterWindow::RasterWindow(QWindow *parent) + : QWindow(parent) + , m_update_pending(false) +{ + m_backingStore = new QBackingStore(this); + create(); + + setGeometry(100, 100, 300, 200); +} + + +bool RasterWindow::event(QEvent *event) +{ + if (event->type() == QEvent::UpdateRequest) { + m_update_pending = false; + renderNow(); + return true; + } + return QWindow::event(event); +} + +void RasterWindow::renderLater() +{ + if (!m_update_pending) { + m_update_pending = true; + QCoreApplication::postEvent(this, new QEvent(QEvent::UpdateRequest)); + } +} + +void RasterWindow::resizeEvent(QResizeEvent *resizeEvent) +{ + m_backingStore->resize(resizeEvent->size()); + if (isExposed()) + renderNow(); +} + +void RasterWindow::exposeEvent(QExposeEvent *) +{ + if (isExposed()) { + renderNow(); + } +} + +void RasterWindow::renderNow() +{ + if (!isExposed()) + return; + + QRect rect(0, 0, width(), height()); + m_backingStore->beginPaint(rect); + + QPaintDevice *device = m_backingStore->paintDevice(); + QPainter painter(device); + + painter.fillRect(0, 0, width(), height(), Qt::white); + render(&painter); + + m_backingStore->endPaint(); + m_backingStore->flush(rect); +} + +void RasterWindow::render(QPainter *painter) +{ + painter->drawText(QRectF(0, 0, width(), height()), Qt::AlignCenter, QStringLiteral("QWindow")); +} |