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95 lines
2.6 KiB
C
95 lines
2.6 KiB
C
3 weeks ago
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/* -*- 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_SCALE_ITEM_H
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#define QWT_PLOT_SCALE_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_scale_draw.h"
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class QPalette;
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/*!
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\brief A class which draws a scale inside the plot canvas
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QwtPlotScaleItem can be used to draw an axis inside the plot canvas.
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It might by synchronized to one of the axis of the plot, but can
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also display its own ticks and labels.
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It is allowed to synchronize the scale item with a disabled axis.
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In plots with vertical and horizontal scale items, it might be
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necessary to remove ticks at the intersections, by overloading
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updateScaleDiv().
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The scale might be at a specific position (f.e 0.0) or it might be
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aligned to a canvas border.
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\par Example
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The following example shows how to replace the left axis, by a scale item
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at the x position 0.0.
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\code
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QwtPlotScaleItem *scaleItem = new QwtPlotScaleItem( QwtScaleDraw::RightScale, 0.0 );
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scaleItem->setFont( plot->axisWidget( QwtPlot::yLeft )->font() );
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scaleItem->attach(plot);
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plot->enableAxis( QwtPlot::yLeft, false );
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\endcode
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\endpar
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*/
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class QWT_EXPORT QwtPlotScaleItem: public QwtPlotItem
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{
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public:
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explicit QwtPlotScaleItem(
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QwtScaleDraw::Alignment = QwtScaleDraw::BottomScale,
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const double pos = 0.0 );
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virtual ~QwtPlotScaleItem();
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virtual int rtti() const;
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void setScaleDiv( const QwtScaleDiv& );
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const QwtScaleDiv& scaleDiv() const;
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void setScaleDivFromAxis( bool on );
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bool isScaleDivFromAxis() const;
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void setPalette( const QPalette & );
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QPalette palette() const;
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void setFont( const QFont& );
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QFont font() const;
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void setScaleDraw( QwtScaleDraw * );
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const QwtScaleDraw *scaleDraw() const;
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QwtScaleDraw *scaleDraw();
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void setPosition( double pos );
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double position() const;
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void setBorderDistance( int );
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int borderDistance() const;
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void setAlignment( QwtScaleDraw::Alignment );
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virtual void draw( QPainter *,
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const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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const QRectF &canvasRect ) const;
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virtual void updateScaleDiv( const QwtScaleDiv &, const QwtScaleDiv & );
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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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