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33fc476d89
* require qwt >=6.2 (and fallback to internal 6.3 if system's qwt doesn't suffice) * debian doesn't have qwt for Qt6 and won't have it for trixie
87 lines
2.9 KiB
C++
87 lines
2.9 KiB
C++
/******************************************************************************
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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 "qwt_plot_abstract_canvas.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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Since Qt 5.4 QOpenGLWidget is available, that is used by QwtPlotOpenGLCanvas.
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\sa QwtPlot::setCanvas(), QwtPlotCanvas, QwtPlotOpenGLCanvas
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\note With Qt4 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 like translated
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geometries.
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\note Another way for getting hardware accelerated graphics is using
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an OpenGL offscreen buffer ( QwtPlotCanvas::OpenGLBuffer ) with QwtPlotCanvas.
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Performance is worse, than rendering straight to a QGLWidget, but is usually
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better integrated into a desktop application.
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*/
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class QWT_EXPORT QwtPlotGLCanvas : public QGLWidget, public QwtPlotAbstractGLCanvas
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{
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Q_OBJECT
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Q_PROPERTY( QFrame::Shadow frameShadow READ frameShadow WRITE setFrameShadow )
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Q_PROPERTY( QFrame::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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Q_PROPERTY( double borderRadius READ borderRadius WRITE setBorderRadius )
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public:
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explicit QwtPlotGLCanvas( QwtPlot* = NULL );
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explicit QwtPlotGLCanvas( const QGLFormat&, QwtPlot* = NULL );
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virtual ~QwtPlotGLCanvas();
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Q_INVOKABLE virtual void invalidateBackingStore() QWT_OVERRIDE;
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Q_INVOKABLE QPainterPath borderPath( const QRect& ) const;
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virtual bool event( QEvent* ) QWT_OVERRIDE;
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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* ) QWT_OVERRIDE;
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virtual void initializeGL() QWT_OVERRIDE;
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virtual void paintGL() QWT_OVERRIDE;
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virtual void resizeGL( int width, int height ) QWT_OVERRIDE;
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private:
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void init();
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virtual void clearBackingStore() QWT_OVERRIDE;
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class PrivateData;
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PrivateData* m_data;
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};
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#endif
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