05fc3aef53
Replace the current license disclaimer in files by a SPDX-License-Identifier. Files that have to be modified by hand are modified. License files are organized under LICENSES directory. Task-number: QTBUG-67283 Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1 Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org> Reviewed-by: Lars Knoll <lars.knoll@qt.io> Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
78 lines
1.4 KiB
C++
78 lines
1.4 KiB
C++
// Copyright (C) 2016 The Qt Company Ltd.
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// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
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#include "rasterwindow.h"
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//! [1]
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RasterWindow::RasterWindow(QWindow *parent)
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: QWindow(parent)
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, m_backingStore(new QBackingStore(this))
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{
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setGeometry(100, 100, 300, 200);
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}
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//! [1]
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//! [7]
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bool RasterWindow::event(QEvent *event)
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{
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if (event->type() == QEvent::UpdateRequest) {
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renderNow();
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return true;
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}
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return QWindow::event(event);
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}
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//! [7]
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//! [6]
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void RasterWindow::renderLater()
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{
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requestUpdate();
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}
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//! [6]
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//! [5]
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void RasterWindow::resizeEvent(QResizeEvent *resizeEvent)
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{
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m_backingStore->resize(resizeEvent->size());
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}
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//! [5]
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//! [2]
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void RasterWindow::exposeEvent(QExposeEvent *)
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{
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if (isExposed())
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renderNow();
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}
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//! [2]
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//! [3]
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void RasterWindow::renderNow()
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{
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if (!isExposed())
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return;
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QRect rect(0, 0, width(), height());
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m_backingStore->beginPaint(rect);
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QPaintDevice *device = m_backingStore->paintDevice();
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QPainter painter(device);
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painter.fillRect(0, 0, width(), height(), QGradient::NightFade);
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render(&painter);
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painter.end();
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m_backingStore->endPaint();
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m_backingStore->flush(rect);
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}
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//! [3]
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//! [4]
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void RasterWindow::render(QPainter *painter)
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{
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painter->drawText(QRectF(0, 0, width(), height()), Qt::AlignCenter, QStringLiteral("QWindow"));
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}
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//! [4]
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