[89] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
|
---|
| 2 | * Qwt Widget Library
|
---|
| 3 | * Copyright (C) 1997 Josef Wilgen
|
---|
| 4 | * Copyright (C) 2002 Uwe Rathmann
|
---|
| 5 | *
|
---|
| 6 | * This library is free software; you can redistribute it and/or
|
---|
| 7 | * modify it under the terms of the Qwt License, Version 1.0
|
---|
| 8 | *****************************************************************************/
|
---|
| 9 |
|
---|
| 10 | #ifndef QWT_PAINT_BUFFER_H
|
---|
| 11 | #define QWT_PAINT_BUFFER_H 1
|
---|
| 12 |
|
---|
| 13 | #include <qglobal.h>
|
---|
| 14 | #if QT_VERSION < 0x040000
|
---|
| 15 |
|
---|
| 16 | #include <qpixmap.h>
|
---|
| 17 | #include "qwt_global.h"
|
---|
| 18 |
|
---|
| 19 | class QPainter;
|
---|
| 20 |
|
---|
| 21 | /*!
|
---|
| 22 | \brief Paint buffer for Qwt widgets
|
---|
| 23 |
|
---|
| 24 | QwtPaintBuffer offers a simple way to en/disable double buffering.
|
---|
| 25 | Double buffering is enabled as default and in general there will be
|
---|
| 26 | no reason to change this.
|
---|
| 27 | */
|
---|
| 28 |
|
---|
| 29 | class QWT_EXPORT QwtPaintBuffer
|
---|
| 30 | {
|
---|
| 31 | public:
|
---|
| 32 | explicit QwtPaintBuffer();
|
---|
| 33 | explicit QwtPaintBuffer(QPaintDevice *, const QRect &, QPainter *p = NULL);
|
---|
| 34 |
|
---|
| 35 | virtual ~QwtPaintBuffer();
|
---|
| 36 |
|
---|
| 37 | void open(QPaintDevice *, const QRect &, QPainter *p = NULL);
|
---|
| 38 | void close();
|
---|
| 39 |
|
---|
| 40 | QPainter *painter();
|
---|
| 41 | const QPaintDevice *device();
|
---|
| 42 |
|
---|
| 43 | static void setEnabled(bool enable);
|
---|
| 44 | static bool isEnabled();
|
---|
| 45 |
|
---|
| 46 | //! Return Buffer used for double buffering
|
---|
| 47 | const QPixmap &buffer() const { return d_pixBuffer; }
|
---|
| 48 |
|
---|
| 49 | protected:
|
---|
| 50 | void flush();
|
---|
| 51 |
|
---|
| 52 | private:
|
---|
| 53 | QPixmap d_pixBuffer;
|
---|
| 54 | QRect d_rect;
|
---|
| 55 |
|
---|
| 56 | QPaintDevice *d_device; // use QGuardedPtr
|
---|
| 57 | QPainter *d_painter; // use QGuardedPtr
|
---|
| 58 | QPainter *d_devicePainter; // use QGuardedPtr
|
---|
| 59 |
|
---|
| 60 | static bool d_enabled;
|
---|
| 61 | };
|
---|
| 62 |
|
---|
| 63 | #endif // QT_VERSION < 0x040000
|
---|
| 64 |
|
---|
| 65 | #endif
|
---|