| 1 | /******************************************************************************
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| 2 | * Qwt Widget Library
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| 3 | * Copyright (C) 1997 Josef Wilgen
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| 4 | * Copyright (C) 2002 Uwe Rathmann
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the Qwt License, Version 1.0
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| 8 | *****************************************************************************/
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| 9 |
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| 10 | #include "qwt_plot_graphicitem.h"
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| 11 | #include "qwt_scale_map.h"
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| 12 | #include "qwt_painter.h"
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| 13 | #include "qwt_text.h"
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| 14 | #include "qwt_graphic.h"
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| 15 |
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| 16 | class QwtPlotGraphicItem::PrivateData
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| 17 | {
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| 18 | public:
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| 19 | QRectF boundingRect;
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| 20 | QwtGraphic graphic;
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| 21 | };
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| 22 |
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| 23 | /*!
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| 24 | \brief Constructor
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| 25 |
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| 26 | Sets the following item attributes:
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| 27 | - QwtPlotItem::AutoScale: true
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| 28 | - QwtPlotItem::Legend: false
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| 29 |
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| 30 | \param title Title
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| 31 | */
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| 32 | QwtPlotGraphicItem::QwtPlotGraphicItem( const QString& title )
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| 33 | : QwtPlotItem( QwtText( title ) )
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| 34 | {
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| 35 | init();
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| 36 | }
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| 37 |
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| 38 | /*!
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| 39 | \brief Constructor
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| 40 |
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| 41 | Sets the following item attributes:
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| 42 | - QwtPlotItem::AutoScale: true
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| 43 | - QwtPlotItem::Legend: false
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| 44 |
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| 45 | \param title Title
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| 46 | */
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| 47 | QwtPlotGraphicItem::QwtPlotGraphicItem( const QwtText& title )
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| 48 | : QwtPlotItem( title )
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| 49 | {
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| 50 | init();
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| 51 | }
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| 52 |
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| 53 | //! Destructor
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| 54 | QwtPlotGraphicItem::~QwtPlotGraphicItem()
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| 55 | {
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| 56 | delete m_data;
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| 57 | }
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| 58 |
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| 59 | void QwtPlotGraphicItem::init()
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| 60 | {
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| 61 | m_data = new PrivateData();
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| 62 | m_data->boundingRect = QwtPlotItem::boundingRect();
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| 63 |
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| 64 | setItemAttribute( QwtPlotItem::AutoScale, true );
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| 65 | setItemAttribute( QwtPlotItem::Legend, false );
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| 66 |
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| 67 | setZ( 8.0 );
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| 68 | }
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| 69 |
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| 70 | //! \return QwtPlotItem::Rtti_PlotGraphic
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| 71 | int QwtPlotGraphicItem::rtti() const
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| 72 | {
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| 73 | return QwtPlotItem::Rtti_PlotGraphic;
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| 74 | }
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| 75 |
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| 76 | /*!
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| 77 | Set the graphic to be displayed
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| 78 |
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| 79 | \param rect Rectangle in plot coordinates
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| 80 | \param graphic Recorded sequence of painter commands
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| 81 | */
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| 82 | void QwtPlotGraphicItem::setGraphic(
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| 83 | const QRectF& rect, const QwtGraphic& graphic )
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| 84 | {
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| 85 | m_data->boundingRect = rect;
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| 86 | m_data->graphic = graphic;
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| 87 |
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| 88 | legendChanged();
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| 89 | itemChanged();
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| 90 | }
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| 91 |
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| 92 | /*!
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| 93 | \return Recorded sequence of painter commands
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| 94 | \sa setGraphic()
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| 95 | */
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| 96 | QwtGraphic QwtPlotGraphicItem::graphic() const
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| 97 | {
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| 98 | return m_data->graphic;
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| 99 | }
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| 100 |
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| 101 | //! Bounding rectangle of the item
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| 102 | QRectF QwtPlotGraphicItem::boundingRect() const
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| 103 | {
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| 104 | return m_data->boundingRect;
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| 105 | }
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| 106 |
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| 107 | /*!
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| 108 | Draw the item
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| 109 |
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| 110 | \param painter Painter
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| 111 | \param xMap X-Scale Map
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| 112 | \param yMap Y-Scale Map
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| 113 | \param canvasRect Contents rect of the plot canvas
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| 114 | */
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| 115 | void QwtPlotGraphicItem::draw( QPainter* painter,
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| 116 | const QwtScaleMap& xMap, const QwtScaleMap& yMap,
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| 117 | const QRectF& canvasRect ) const
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| 118 | {
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| 119 | if ( m_data->graphic.isEmpty() )
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| 120 | return;
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| 121 |
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| 122 | QRectF r = QwtScaleMap::transform( xMap, yMap, boundingRect() );
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| 123 |
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| 124 | if ( !r.intersects( canvasRect ) )
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| 125 | return;
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| 126 |
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| 127 | if ( QwtPainter::roundingAlignment( painter ) )
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| 128 | {
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| 129 | r.setLeft ( qRound( r.left() ) );
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| 130 | r.setRight ( qRound( r.right() ) );
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| 131 | r.setTop ( qRound( r.top() ) );
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| 132 | r.setBottom ( qRound( r.bottom() ) );
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| 133 | }
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| 134 |
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| 135 | m_data->graphic.render( painter, r );
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| 136 | }
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