| 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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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 | #ifndef QWT_PLOT_SCALE_ITEM_H
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| 11 | #define QWT_PLOT_SCALE_ITEM_H
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| 12 |
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| 13 | #include "qwt_global.h"
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| 14 | #include "qwt_plot_item.h"
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| 15 | #include "qwt_scale_draw.h"
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| 16 |
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| 17 | class QPalette;
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| 18 |
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| 19 | /*!
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| 20 | \brief A class which draws a scale inside the plot canvas
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| 21 |
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| 22 | QwtPlotScaleItem can be used to draw an axis inside the plot canvas.
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| 23 | It might by synchronized to one of the axis of the plot, but can
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| 24 | also display its own ticks and labels.
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| 25 |
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| 26 | It is allowed to synchronize the scale item with a disabled axis.
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| 27 | In plots with vertical and horizontal scale items, it might be
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| 28 | necessary to remove ticks at the intersections, by overloading
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| 29 | updateScaleDiv().
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| 30 |
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| 31 | The scale might be at a specific position (f.e 0.0) or it might be
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| 32 | aligned to a canvas border.
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| 33 |
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| 34 | \par Example
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| 35 | The following example shows how to replace the left axis, by a scale item
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| 36 | at the x position 0.0.
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| 37 | \verbatim
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| 38 | QwtPlotScaleItem *scaleItem =
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| 39 | new QwtPlotScaleItem(QwtScaleDraw::RightScale, 0.0);
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| 40 | scaleItem->setFont(plot->axisWidget(QwtPlot::yLeft)->font());
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| 41 | scaleItem->attach(plot);
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| 42 |
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| 43 | plot->enableAxis(QwtPlot::yLeft, false);
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| 44 | \endverbatim
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| 45 | */
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| 46 |
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| 47 | class QWT_EXPORT QwtPlotScaleItem: public QwtPlotItem
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| 48 | {
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| 49 | public:
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| 50 | explicit QwtPlotScaleItem(
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| 51 | QwtScaleDraw::Alignment = QwtScaleDraw::BottomScale,
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| 52 | const double pos = 0.0 );
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| 53 |
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| 54 | virtual ~QwtPlotScaleItem();
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| 55 |
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| 56 | virtual int rtti() const;
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| 57 |
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| 58 | void setScaleDiv( const QwtScaleDiv& );
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| 59 | const QwtScaleDiv& scaleDiv() const;
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| 60 |
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| 61 | void setScaleDivFromAxis( bool on );
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| 62 | bool isScaleDivFromAxis() const;
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| 63 |
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| 64 | void setPalette( const QPalette & );
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| 65 | QPalette palette() const;
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| 66 |
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| 67 | void setFont( const QFont& );
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| 68 | QFont font() const;
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| 69 |
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| 70 | void setScaleDraw( QwtScaleDraw * );
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| 71 |
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| 72 | const QwtScaleDraw *scaleDraw() const;
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| 73 | QwtScaleDraw *scaleDraw();
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| 74 |
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| 75 | void setPosition( double pos );
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| 76 | double position() const;
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| 77 |
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| 78 | void setBorderDistance( int numPixels );
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| 79 | int borderDistance() const;
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| 80 |
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| 81 | void setAlignment( QwtScaleDraw::Alignment );
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| 82 |
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| 83 | virtual void draw( QPainter *p,
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| 84 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
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| 85 | const QRectF &rect ) const;
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| 86 |
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| 87 | virtual void updateScaleDiv( const QwtScaleDiv &, const QwtScaleDiv & );
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| 88 |
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| 89 | private:
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| 90 | class PrivateData;
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| 91 | PrivateData *d_data;
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| 92 | };
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| 93 |
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| 94 | #endif
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