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67 lines
1.5 KiB
67 lines
1.5 KiB
/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** |
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* Qwt Widget Library |
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* Copyright (C) 1997 Josef Wilgen |
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* Copyright (C) 2002 Uwe Rathmann |
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* |
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* This library is free software; you can redistribute it and/or |
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* modify it under the terms of the Qwt License, Version 1.0 |
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*****************************************************************************/ |
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#ifndef QWT_PAINT_BUFFER_H |
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#define QWT_PAINT_BUFFER_H 1 |
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#include <qglobal.h> |
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#if QT_VERSION < 0x040000 |
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#include <qpixmap.h> |
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#include "qwt_global.h" |
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class QPainter; |
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/*! |
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\brief Paint buffer for Qwt widgets |
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QwtPaintBuffer offers a simple way to en/disable double buffering. |
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Double buffering is enabled as default and in general there will be |
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no reason to change this. |
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*/ |
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class QWT_EXPORT QwtPaintBuffer |
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{ |
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public: |
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explicit QwtPaintBuffer(); |
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explicit QwtPaintBuffer(QPaintDevice *, const QRect &, QPainter *p = NULL); |
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virtual ~QwtPaintBuffer(); |
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void open(QPaintDevice *, const QRect &, QPainter *p = NULL); |
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void close(); |
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QPainter *painter(); |
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const QPaintDevice *device(); |
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static void setEnabled(bool enable); |
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static bool isEnabled(); |
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//! Return Buffer used for double buffering |
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const QPixmap &buffer() const { |
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return d_pixBuffer; |
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} |
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protected: |
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void flush(); |
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private: |
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QPixmap d_pixBuffer; |
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QRect d_rect; |
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QPaintDevice *d_device; // use QGuardedPtr |
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QPainter *d_painter; // use QGuardedPtr |
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QPainter *d_devicePainter; // use QGuardedPtr |
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static bool d_enabled; |
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}; |
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#endif // QT_VERSION < 0x040000 |
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#endif
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