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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
137 lines
2.9 KiB
C++
137 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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#include "qwt_plot_graphicitem.h"
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#include "qwt_scale_map.h"
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#include "qwt_painter.h"
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#include "qwt_text.h"
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#include "qwt_graphic.h"
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class QwtPlotGraphicItem::PrivateData
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{
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public:
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QRectF boundingRect;
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QwtGraphic graphic;
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};
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/*!
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\brief Constructor
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Sets the following item attributes:
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- QwtPlotItem::AutoScale: true
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- QwtPlotItem::Legend: false
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\param title Title
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*/
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QwtPlotGraphicItem::QwtPlotGraphicItem( const QString& title )
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: QwtPlotItem( QwtText( title ) )
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{
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init();
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}
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/*!
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\brief Constructor
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Sets the following item attributes:
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- QwtPlotItem::AutoScale: true
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- QwtPlotItem::Legend: false
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\param title Title
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*/
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QwtPlotGraphicItem::QwtPlotGraphicItem( const QwtText& title )
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: QwtPlotItem( title )
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{
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init();
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}
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//! Destructor
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QwtPlotGraphicItem::~QwtPlotGraphicItem()
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{
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delete m_data;
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}
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void QwtPlotGraphicItem::init()
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{
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m_data = new PrivateData();
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m_data->boundingRect = QwtPlotItem::boundingRect();
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setItemAttribute( QwtPlotItem::AutoScale, true );
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setItemAttribute( QwtPlotItem::Legend, false );
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setZ( 8.0 );
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}
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//! \return QwtPlotItem::Rtti_PlotGraphic
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int QwtPlotGraphicItem::rtti() const
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{
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return QwtPlotItem::Rtti_PlotGraphic;
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}
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/*!
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Set the graphic to be displayed
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\param rect Rectangle in plot coordinates
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\param graphic Recorded sequence of painter commands
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*/
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void QwtPlotGraphicItem::setGraphic(
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const QRectF& rect, const QwtGraphic& graphic )
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{
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m_data->boundingRect = rect;
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m_data->graphic = graphic;
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legendChanged();
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itemChanged();
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}
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/*!
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\return Recorded sequence of painter commands
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\sa setGraphic()
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*/
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QwtGraphic QwtPlotGraphicItem::graphic() const
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{
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return m_data->graphic;
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}
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//! Bounding rectangle of the item
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QRectF QwtPlotGraphicItem::boundingRect() const
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{
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return m_data->boundingRect;
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}
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/*!
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Draw the item
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\param painter Painter
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\param xMap X-Scale Map
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\param yMap Y-Scale Map
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\param canvasRect Contents rect of the plot canvas
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*/
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void QwtPlotGraphicItem::draw( QPainter* painter,
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const QwtScaleMap& xMap, const QwtScaleMap& yMap,
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const QRectF& canvasRect ) const
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{
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if ( m_data->graphic.isEmpty() )
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return;
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QRectF r = QwtScaleMap::transform( xMap, yMap, boundingRect() );
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if ( !r.intersects( canvasRect ) )
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return;
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if ( QwtPainter::roundingAlignment( painter ) )
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{
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r.setLeft ( qRound( r.left() ) );
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r.setRight ( qRound( r.right() ) );
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r.setTop ( qRound( r.top() ) );
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r.setBottom ( qRound( r.bottom() ) );
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}
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m_data->graphic.render( painter, r );
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}
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