103 lines
3.9 KiB
C++
103 lines
3.9 KiB
C++
/****************************************************************************
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** Copyright (C) 2001-2011 Klaralvdalens Datakonsult AB. All rights reserved.
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**
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** This file is part of the KD Chart library.
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**
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** Licensees holding valid commercial KD Chart licenses may use this file in
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** accordance with the KD Chart Commercial License Agreement provided with
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** the Software.
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**
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**
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** This file may be distributed and/or modified under the terms of the
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** GNU General Public License version 2 and version 3 as published by the
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** Free Software Foundation and appearing in the file LICENSE.GPL.txt included.
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**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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** Contact info@kdab.com if any conditions of this licensing are not
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** clear to you.
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**
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**********************************************************************/
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#ifndef NULL_PAINT_DEVICE_H
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#define NULL_PAINT_DEVICE_H
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#include <QPaintDevice>
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#include <QPaintEngine>
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namespace KDChart
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{
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class NullPaintEngine : public QPaintEngine
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{
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public:
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virtual bool begin(QPaintDevice * /*pdev*/) { return true; }
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virtual void drawEllipse(const QRectF & /*rect*/) { }
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virtual void drawEllipse(const QRect & /*rect*/) { }
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virtual void drawImage(const QRectF & /*rectangle*/, const QImage & /*image*/, const QRectF & /*sr*/, Qt::ImageConversionFlags /*flags*/) { }
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virtual void drawLines(const QLineF * /*lines*/, int /*lineCount*/) { }
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virtual void drawLines(const QLine * /*lines*/, int /*lineCount*/) { }
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virtual void drawPath(const QPainterPath & /*path*/) { }
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virtual void drawPixmap(const QRectF & /*r*/, const QPixmap & /*pm*/, const QRectF & /*sr*/) { }
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virtual void drawPoints(const QPointF * /*points*/, int /*pointCount*/) { }
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virtual void drawPoints(const QPoint * /*points*/, int /*pointCount*/) { }
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virtual void drawPolygon(const QPointF * /*points*/, int /*pointCount*/, PolygonDrawMode /*mode*/) { }
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virtual void drawPolygon(const QPoint * /*points*/, int /*pointCount*/, PolygonDrawMode /*mode*/) { }
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virtual void drawRects(const QRectF * /*rects*/, int /*rectCount*/) { }
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virtual void drawRects(const QRect * /*rects*/, int /*rectCount*/) { }
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virtual void drawTextItem(const QPointF & /*p*/, const QTextItem & /*textItem*/) { }
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virtual void drawTiledPixmap(const QRectF & /*rect*/, const QPixmap & /*pixmap*/, const QPointF & /*p*/) { }
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virtual bool end() { return true; }
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virtual Type type() const { return QPaintEngine::User; }
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virtual void updateState(const QPaintEngineState & /*state*/) { }
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};
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class NullPaintDevice : public QPaintDevice
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{
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public:
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NullPaintDevice(const QSize& size) : m_size(size) { }
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~NullPaintDevice() { }
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int metric(PaintDeviceMetric metric) const
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{
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switch(metric)
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{
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case QPaintDevice::PdmWidth:
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return m_size.width();
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case QPaintDevice::PdmHeight:
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return m_size.height();
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case QPaintDevice::PdmWidthMM:
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return 1;
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case QPaintDevice::PdmHeightMM:
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return 1;
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case QPaintDevice::PdmNumColors:
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return int((uint)(-1));
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case QPaintDevice::PdmDepth:
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return 1;
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case QPaintDevice::PdmDpiX:
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return 1;
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case QPaintDevice::PdmDpiY:
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return 1;
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case QPaintDevice::PdmPhysicalDpiX:
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return 1;
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case QPaintDevice::PdmPhysicalDpiY:
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return 1;
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}
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return 1;
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}
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QPaintEngine* paintEngine() const
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{
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static NullPaintEngine nullPaintEngine;
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return &nullPaintEngine;
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}
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private:
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QSize m_size;
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};
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}
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#endif
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