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137 lines
3.8 KiB
137 lines
3.8 KiB
11 years ago
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/* -*- 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_PLOT_GLCANVAS_H
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#define QWT_PLOT_GLCANVAS_H
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#include "qwt_global.h"
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#include <qframe.h>
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#include <qgl.h>
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class QwtPlot;
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/*!
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\brief An alternative canvas for a QwtPlot derived from QGLWidget
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QwtPlotGLCanvas implements the very basics to act as canvas
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inside of a QwtPlot widget. It might be extended to a full
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featured alternative to QwtPlotCanvas in a future version of Qwt.
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Even if QwtPlotGLCanvas is not derived from QFrame it imitates
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its API. When using style sheets it supports the box model - beside
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backgrounds with rounded borders.
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\sa QwtPlot::setCanvas(), QwtPlotCanvas
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\note You might want to use the QPaintEngine::OpenGL paint engine
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( see QGL::setPreferredPaintEngine() ). On a Linux test system
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QPaintEngine::OpenGL2 shows very basic problems ( wrong
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geometries of rectangles ) but also more advanced stuff
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like antialiasing doesn't work.
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\note Another way to introduce OpenGL rendering to Qwt
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is to use QGLPixelBuffer or QGLFramebufferObject. Both
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type of buffers can be converted into a QImage and
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used in combination with a regular QwtPlotCanvas.
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*/
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class QWT_EXPORT QwtPlotGLCanvas: public QGLWidget
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{
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Q_OBJECT
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Q_ENUMS( Shape Shadow )
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Q_PROPERTY( Shadow frameShadow READ frameShadow WRITE setFrameShadow )
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Q_PROPERTY( Shape frameShape READ frameShape WRITE setFrameShape )
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Q_PROPERTY( int lineWidth READ lineWidth WRITE setLineWidth )
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Q_PROPERTY( int midLineWidth READ midLineWidth WRITE setMidLineWidth )
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Q_PROPERTY( int frameWidth READ frameWidth )
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Q_PROPERTY( QRect frameRect READ frameRect DESIGNABLE false )
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public:
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/*!
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\brief Frame shadow
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Unfortunately it is not possible to use QFrame::Shadow
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as a property of a widget that is not derived from QFrame.
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The following enum is made for the designer only. It is safe
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to use QFrame::Shadow instead.
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*/
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enum Shadow
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{
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//! QFrame::Plain
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Plain = QFrame::Plain,
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//! QFrame::Raised
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Raised = QFrame::Raised,
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//! QFrame::Sunken
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Sunken = QFrame::Sunken
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};
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/*!
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\brief Frame shape
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Unfortunately it is not possible to use QFrame::Shape
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as a property of a widget that is not derived from QFrame.
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The following enum is made for the designer only. It is safe
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to use QFrame::Shadow instead.
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\note QFrame::StyledPanel and QFrame::WinPanel are unsuported
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and will be displayed as QFrame::Panel.
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*/
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enum Shape
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{
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NoFrame = QFrame::NoFrame,
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Box = QFrame::Box,
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Panel = QFrame::Panel
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};
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explicit QwtPlotGLCanvas( QwtPlot * = NULL );
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virtual ~QwtPlotGLCanvas();
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void setFrameStyle( int style );
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int frameStyle() const;
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void setFrameShadow( Shadow );
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Shadow frameShadow() const;
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void setFrameShape( Shape );
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Shape frameShape() const;
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void setLineWidth( int );
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int lineWidth() const;
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void setMidLineWidth( int );
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int midLineWidth() const;
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int frameWidth() const;
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QRect frameRect() const;
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Q_INVOKABLE QPainterPath borderPath( const QRect & ) const;
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virtual bool event( QEvent * );
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public Q_SLOTS:
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void replot();
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protected:
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virtual void paintEvent( QPaintEvent * );
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virtual void drawBackground( QPainter * );
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virtual void drawBorder( QPainter * );
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virtual void drawItems( QPainter * );
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private:
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class PrivateData;
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PrivateData *d_data;
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};
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#endif
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