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136 lines
3.6 KiB
136 lines
3.6 KiB
/* -*- 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_LEGEND_ITEM_H |
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#define QWT_PLOT_LEGEND_ITEM_H |
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#include "qwt_global.h" |
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#include "qwt_plot_item.h" |
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#include "qwt_legend_data.h" |
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class QFont; |
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/*! |
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\brief A class which draws a legend inside the plot canvas |
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QwtPlotLegendItem can be used to draw a inside the plot canvas. |
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It can be used together with a QwtLegend or instead of it |
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to have more space for the plot canvas. |
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In opposite to QwtLegend the legend item is not interactive. |
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To identify mouse clicks on a legend item an event filter |
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needs to be installed catching mouse events ob the plot canvas. |
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The geometries of the legend items are available using |
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legendGeometries(). |
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The legend item is aligned to plot canvas according to |
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its alignment() flags. It might have a background for the |
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complete legend ( usually semi transparent ) or for |
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each legend item. |
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\note An external QwtLegend with a transparent background |
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on top the plot canvas might be another option |
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with a similar effect. |
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*/ |
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class QWT_EXPORT QwtPlotLegendItem: public QwtPlotItem |
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{ |
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public: |
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/*! |
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\brief Background mode |
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Depending on the mode the complete legend or each item |
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might have an background. |
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The default setting is LegendBackground. |
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\sa setBackgroundMode(), setBackgroundBrush(), drawBackground() |
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*/ |
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enum BackgroundMode |
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{ |
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//! The legend has a background |
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LegendBackground, |
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//! Each item has a background |
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ItemBackground |
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}; |
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explicit QwtPlotLegendItem(); |
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virtual ~QwtPlotLegendItem(); |
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virtual int rtti() const; |
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void setAlignment( Qt::Alignment ); |
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Qt::Alignment alignment() const; |
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void setMaxColumns( uint ); |
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uint maxColumns() const; |
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void setMargin( int ); |
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int margin() const; |
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void setSpacing( int ); |
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int spacing() const; |
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void setItemMargin( int ); |
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int itemMargin() const; |
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void setItemSpacing( int ); |
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int itemSpacing() const; |
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void setFont( const QFont& ); |
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QFont font() const; |
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void setBorderDistance( int numPixels ); |
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int borderDistance() const; |
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void setBorderRadius( double ); |
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double borderRadius() const; |
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void setBorderPen( const QPen & ); |
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QPen borderPen() const; |
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void setBackgroundBrush( const QBrush & ); |
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QBrush backgroundBrush() const; |
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void setBackgroundMode( BackgroundMode ); |
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BackgroundMode backgroundMode() const; |
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void setTextPen( const QPen & ); |
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QPen textPen() const; |
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virtual void draw( QPainter *p, |
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const QwtScaleMap &xMap, const QwtScaleMap &yMap, |
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const QRectF &rect ) const; |
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void clearLegend(); |
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virtual void updateLegend( const QwtPlotItem *, |
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const QList<QwtLegendData> & ); |
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virtual QRect geometry( const QRectF &canvasRect ) const; |
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virtual QSize minimumSize( const QwtLegendData & ) const; |
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virtual int heightForWidth( const QwtLegendData &, int w ) const; |
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QList< const QwtPlotItem * > plotItems() const; |
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QList< QRect > legendGeometries( const QwtPlotItem * ) const; |
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protected: |
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virtual void drawLegendData( QPainter *painter, |
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const QwtPlotItem *, const QwtLegendData &, const QRectF & ) const; |
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virtual void drawBackground( QPainter *, const QRectF &rect ) const; |
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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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