78 lines
1.6 KiB
C++
78 lines
1.6 KiB
C++
/*****************************************************************************
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* Qwt Examples - Copyright (C) 2002 Uwe Rathmann
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* This file may be used under the terms of the 3-clause BSD License
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*****************************************************************************/
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#include "Canvas.h"
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#include <QwtGraphic>
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#include <QSvgRenderer>
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Canvas::Canvas( Mode mode, QWidget* parent )
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: QWidget( parent )
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, m_mode( mode )
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{
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const int m = 10;
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setContentsMargins( m, m, m, m );
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if ( m_mode == Svg )
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m_renderer = new QSvgRenderer( this );
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else
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m_graphic = new QwtGraphic();
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}
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Canvas::~Canvas()
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{
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if ( m_mode == VectorGraphic )
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delete m_graphic;
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}
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void Canvas::setSvg( const QByteArray& svgData )
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{
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if ( m_mode == VectorGraphic )
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{
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m_graphic->reset();
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QSvgRenderer renderer;
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renderer.load( svgData );
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QPainter p( m_graphic );
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renderer.render( &p, renderer.viewBoxF() );
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p.end();
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}
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else
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{
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m_renderer->load( svgData );
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}
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update();
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}
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void Canvas::paintEvent( QPaintEvent* )
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{
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QPainter painter( this );
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painter.save();
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painter.setPen( Qt::black );
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painter.setBrush( Qt::white );
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painter.drawRect( contentsRect().adjusted( 0, 0, -1, -1 ) );
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painter.restore();
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painter.setPen( Qt::NoPen );
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painter.setBrush( Qt::NoBrush );
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render( &painter, contentsRect() );
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}
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void Canvas::render( QPainter* painter, const QRect& rect ) const
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{
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if ( m_mode == Svg )
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{
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m_renderer->render( painter, rect );
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}
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else
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{
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m_graphic->render( painter, rect );
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}
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}
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