| [8127] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
|
|---|
| 2 | * Qwt Widget Library
|
|---|
| 3 | * Copyright (C) 1997 Josef Wilgen
|
|---|
| 4 | * Copyright (C) 2002 Uwe Rathmann
|
|---|
| 5 | *
|
|---|
| 6 | * This library is free software; you can redistribute it and/or
|
|---|
| 7 | * modify it under the terms of the Qwt License, Version 1.0
|
|---|
| 8 | *****************************************************************************/
|
|---|
| 9 |
|
|---|
| 10 | #ifndef QWT_PLOT_ABSTRACT_BAR_CHART_H
|
|---|
| 11 | #define QWT_PLOT_ABSTRACT_BAR_CHART_H
|
|---|
| 12 |
|
|---|
| 13 | #include "qwt_global.h"
|
|---|
| 14 | #include "qwt_plot_seriesitem.h"
|
|---|
| 15 | #include "qwt_series_data.h"
|
|---|
| 16 |
|
|---|
| 17 | /*!
|
|---|
| 18 | \brief Abstract base class for bar chart items
|
|---|
| 19 |
|
|---|
| 20 | In opposite to almost all other plot items bar charts can't be
|
|---|
| 21 | displayed inside of their bounding rectangle and need a special
|
|---|
| 22 | API how to calculate the width of the bars and how they affect
|
|---|
| 23 | the layout of the attached plot.
|
|---|
| 24 | */
|
|---|
| 25 | class QWT_EXPORT QwtPlotAbstractBarChart: public QwtPlotSeriesItem
|
|---|
| 26 | {
|
|---|
| 27 | public:
|
|---|
| 28 | /*!
|
|---|
| 29 | \brief Mode how to calculate the bar width
|
|---|
| 30 |
|
|---|
| 31 | setLayoutPolicy(), setLayoutHint(), barWidthHint()
|
|---|
| 32 | */
|
|---|
| 33 | enum LayoutPolicy
|
|---|
| 34 | {
|
|---|
| 35 | /*!
|
|---|
| 36 | The sample width is calculated by dividing the bounding rectangle
|
|---|
| 37 | by the number of samples. The layoutHint() is used as a minimum width
|
|---|
| 38 | in paint device coordinates.
|
|---|
| 39 |
|
|---|
| 40 | \sa boundingRectangle()
|
|---|
| 41 | */
|
|---|
| 42 | AutoAdjustSamples,
|
|---|
| 43 |
|
|---|
| 44 | /*!
|
|---|
| 45 | layoutHint() defines an interval in axis coordinates
|
|---|
| 46 | */
|
|---|
| 47 | ScaleSamplesToAxes,
|
|---|
| 48 |
|
|---|
| 49 | /*!
|
|---|
| 50 | The bar width is calculated by multiplying layoutHint()
|
|---|
| 51 | with the height or width of the canvas.
|
|---|
| 52 |
|
|---|
| 53 | \sa boundingRectangle()
|
|---|
| 54 | */
|
|---|
| 55 | ScaleSampleToCanvas,
|
|---|
| 56 |
|
|---|
| 57 | /*!
|
|---|
| 58 | layoutHint() defines a fixed width in paint device coordinates.
|
|---|
| 59 | */
|
|---|
| 60 | FixedSampleSize
|
|---|
| 61 | };
|
|---|
| 62 |
|
|---|
| 63 | explicit QwtPlotAbstractBarChart( const QwtText &title );
|
|---|
| 64 | virtual ~QwtPlotAbstractBarChart();
|
|---|
| 65 |
|
|---|
| 66 | void setLayoutPolicy( LayoutPolicy );
|
|---|
| 67 | LayoutPolicy layoutPolicy() const;
|
|---|
| 68 |
|
|---|
| 69 | void setLayoutHint( double );
|
|---|
| 70 | double layoutHint() const;
|
|---|
| 71 |
|
|---|
| 72 | void setSpacing( int );
|
|---|
| 73 | int spacing() const;
|
|---|
| 74 |
|
|---|
| 75 | void setMargin( int );
|
|---|
| 76 | int margin() const;
|
|---|
| 77 |
|
|---|
| 78 | void setBaseline( double );
|
|---|
| 79 | double baseline() const;
|
|---|
| 80 |
|
|---|
| 81 | virtual void getCanvasMarginHint(
|
|---|
| 82 | const QwtScaleMap &xMap, const QwtScaleMap &yMap,
|
|---|
| 83 | const QRectF &canvasRect,
|
|---|
| 84 | double &left, double &top, double &right, double &bottom) const;
|
|---|
| 85 |
|
|---|
| 86 |
|
|---|
| 87 | protected:
|
|---|
| 88 | double sampleWidth( const QwtScaleMap &map,
|
|---|
| 89 | double canvasSize, double dataSize,
|
|---|
| 90 | double value ) const;
|
|---|
| 91 |
|
|---|
| 92 | private:
|
|---|
| 93 | class PrivateData;
|
|---|
| 94 | PrivateData *d_data;
|
|---|
| 95 | };
|
|---|
| 96 |
|
|---|
| 97 | #endif
|
|---|
