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75 lines
1.8 KiB
75 lines
1.8 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_TEXT_LABEL_H |
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#define QWT_PLOT_TEXT_LABEL_H 1 |
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#include "qwt_global.h" |
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#include "qwt_plot_item.h" |
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#include "qwt_text.h" |
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/*! |
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\brief A plot item, which displays a text label |
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QwtPlotTextLabel displays a text label aligned to the plot canvas. |
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In opposite to QwtPlotMarker the position of the label is unrelated to |
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plot coordinates. |
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As drawing a text is an expensive operation the label is cached |
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in a pixmap to speed up replots. |
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\par Example |
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The following code shows how to add a title. |
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\verbatim |
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QwtText title( "Plot Title" ); |
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title.setRenderFlags( Qt::AlignHCenter | Qt::AlignTop ); |
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QFont font; |
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font.setBold( true ); |
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title.setFont( font ); |
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QwtPlotTextLabel *titleItem = new QwtPlotTextLabel(); |
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titleItem->setText( title ); |
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titleItem->attach( this ); |
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\endverbatim |
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\sa QwtPlotMarker |
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*/ |
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class QWT_EXPORT QwtPlotTextLabel: public QwtPlotItem |
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{ |
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public: |
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QwtPlotTextLabel(); |
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virtual ~QwtPlotTextLabel(); |
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virtual int rtti() const; |
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void setText( const QwtText & ); |
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QwtText text() const; |
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void setMargin( int margin ); |
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int margin() const; |
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virtual QRectF textRect( const QRectF &, const QSizeF & ) const; |
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protected: |
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virtual void draw( QPainter *, |
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const QwtScaleMap &, const QwtScaleMap &, |
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const QRectF &) const; |
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void invalidateCache(); |
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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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