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Diffstat (limited to 'src/gui/kernel/qpaintdevicewindow_p.h')
-rw-r--r-- | src/gui/kernel/qpaintdevicewindow_p.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/src/gui/kernel/qpaintdevicewindow_p.h b/src/gui/kernel/qpaintdevicewindow_p.h new file mode 100644 index 0000000000..1935bb6db5 --- /dev/null +++ b/src/gui/kernel/qpaintdevicewindow_p.h @@ -0,0 +1,122 @@ +/**************************************************************************** +** +** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the QtGui module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL21$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/contact-us. +** +** 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 or version 3 as published by the Free +** Software Foundation and appearing in the file LICENSE.LGPLv21 and +** LICENSE.LGPLv3 included in the packaging of this file. Please review the +** following information to ensure the GNU Lesser General Public License +** requirements will be met: https://www.gnu.org/licenses/lgpl.html and +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#ifndef QPAINTDEVICEWINDOW_P_H +#define QPAINTDEVICEWINDOW_P_H + +#include <QtGui/QPaintDeviceWindow> +#include <QtCore/QCoreApplication> +#include <QtGui/private/qwindow_p.h> +#include <QtGui/QPaintEvent> + +QT_BEGIN_NAMESPACE + +class Q_GUI_EXPORT QPaintDeviceWindowPrivate : public QWindowPrivate +{ + Q_DECLARE_PUBLIC(QPaintDeviceWindow) + +public: + QPaintDeviceWindowPrivate() : paintEventSent(false) { } + + virtual void beginPaint(const QRegion ®ion) + { + Q_UNUSED(region); + } + + virtual void endPaint() + { + } + + virtual void flush(const QRegion ®ion) + { + Q_UNUSED(region); + } + + bool paint(const QRegion ®ion) + { + Q_Q(QPaintDeviceWindow); + QRegion toPaint = region & dirtyRegion; + if (toPaint.isEmpty()) + return false; + + // Clear the region now. The overridden functions may call update(). + dirtyRegion -= toPaint; + + beginPaint(toPaint); + + QPaintEvent paintEvent(toPaint); + q->paintEvent(&paintEvent); + + endPaint(); + + return true; + } + + void triggerUpdate() + { + Q_Q(QPaintDeviceWindow); + if (!paintEventSent) { + QCoreApplication::postEvent(q, new QEvent(QEvent::UpdateRequest)); + paintEventSent = true; + } + } + + void doFlush(const QRegion ®ion) + { + QRegion toFlush = region; + if (paint(toFlush)) + flush(toFlush); + } + + void handleUpdateEvent() + { + if (dirtyRegion.isEmpty()) + return; + doFlush(dirtyRegion); + } + + void markWindowAsDirty() + { + Q_Q(QPaintDeviceWindow); + dirtyRegion += QRect(QPoint(0, 0), q->size()); + } + +private: + QRegion dirtyRegion; + bool paintEventSent; +}; + + +QT_END_NAMESPACE + +#endif //QPAINTDEVICEWINDOW_P_H |