[4272] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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| 2 | * QwtPolar Widget Library
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| 3 | * Copyright (C) 2008 Uwe Rathmann
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| 4 | *
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| 5 | * This library is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the Qwt License, Version 1.0
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| 7 | *****************************************************************************/
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| 8 |
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| 9 | #include "qwt_polar_plot.h"
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| 10 | #include "qwt_polar_canvas.h"
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| 11 | #include "qwt_polar_layout.h"
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| 12 | #include <qwt_painter.h>
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| 13 | #include <qwt_scale_engine.h>
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| 14 | #include <qwt_scale_div.h>
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| 15 | #include <qwt_text_label.h>
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| 16 | #include <qwt_round_scale_draw.h>
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| 17 | #include <qwt_legend.h>
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| 18 | #include <qwt_dyngrid_layout.h>
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| 19 | #include <qpointer.h>
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| 20 | #include <qpaintengine.h>
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| 21 | #include <qpainter.h>
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| 22 | #include <qevent.h>
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| 23 |
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| 24 | static inline double qwtDistance(
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| 25 | const QPointF &p1, const QPointF &p2 )
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| 26 | {
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| 27 | double dx = p2.x() - p1.x();
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| 28 | double dy = p2.y() - p1.y();
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| 29 | return qSqrt( dx * dx + dy * dy );
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| 30 | }
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| 31 |
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| 32 | class QwtPolarPlot::ScaleData
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| 33 | {
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| 34 | public:
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| 35 | ScaleData():
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[8127] | 36 | isValid( false ),
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[4272] | 37 | scaleEngine( NULL )
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| 38 | {
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| 39 | }
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| 40 |
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| 41 | ~ScaleData()
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| 42 | {
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| 43 | delete scaleEngine;
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| 44 | }
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| 45 |
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| 46 | bool doAutoScale;
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| 47 |
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| 48 | double minValue;
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| 49 | double maxValue;
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| 50 | double stepSize;
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| 51 |
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| 52 | int maxMajor;
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| 53 | int maxMinor;
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| 54 |
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[8127] | 55 | bool isValid;
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| 56 |
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[4272] | 57 | QwtScaleDiv scaleDiv;
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| 58 | QwtScaleEngine *scaleEngine;
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| 59 | };
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| 60 |
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| 61 | class QwtPolarPlot::PrivateData
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| 62 | {
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| 63 | public:
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| 64 | QBrush canvasBrush;
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| 65 |
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| 66 | bool autoReplot;
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| 67 |
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| 68 | QwtPointPolar zoomPos;
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| 69 | double zoomFactor;
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| 70 |
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| 71 | ScaleData scaleData[QwtPolar::ScaleCount];
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| 72 | QPointer<QwtTextLabel> titleLabel;
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| 73 | QPointer<QwtPolarCanvas> canvas;
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[8127] | 74 | QPointer<QwtAbstractLegend> legend;
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[4272] | 75 | double azimuthOrigin;
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| 76 |
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| 77 | QwtPolarLayout *layout;
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| 78 | };
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| 79 |
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| 80 | /*!
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| 81 | Constructor
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| 82 | \param parent Parent widget
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| 83 | */
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| 84 | QwtPolarPlot::QwtPolarPlot( QWidget *parent ):
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| 85 | QFrame( parent )
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| 86 | {
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| 87 | initPlot( QwtText() );
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| 88 | }
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| 89 |
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| 90 | /*!
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| 91 | Constructor
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| 92 | \param title Title text
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| 93 | \param parent Parent widget
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| 94 | */
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| 95 | QwtPolarPlot::QwtPolarPlot( const QwtText &title, QWidget *parent ):
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| 96 | QFrame( parent )
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| 97 | {
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| 98 | initPlot( title );
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| 99 | }
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| 100 |
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| 101 | //! Destructor
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| 102 | QwtPolarPlot::~QwtPolarPlot()
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| 103 | {
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| 104 | detachItems( QwtPolarItem::Rtti_PolarItem, autoDelete() );
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| 105 |
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| 106 | delete d_data->layout;
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| 107 | delete d_data;
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| 108 | }
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| 109 |
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| 110 | /*!
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| 111 | Change the plot's title
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| 112 | \param title New title
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| 113 | */
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| 114 | void QwtPolarPlot::setTitle( const QString &title )
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| 115 | {
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| 116 | if ( title != d_data->titleLabel->text().text() )
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| 117 | {
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| 118 | d_data->titleLabel->setText( title );
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| 119 | if ( !title.isEmpty() )
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| 120 | d_data->titleLabel->show();
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| 121 | else
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| 122 | d_data->titleLabel->hide();
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| 123 | }
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| 124 | }
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| 125 |
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| 126 | /*!
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| 127 | Change the plot's title
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| 128 | \param title New title
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| 129 | */
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| 130 | void QwtPolarPlot::setTitle( const QwtText &title )
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| 131 | {
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| 132 | if ( title != d_data->titleLabel->text() )
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| 133 | {
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| 134 | d_data->titleLabel->setText( title );
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| 135 | if ( !title.isEmpty() )
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| 136 | d_data->titleLabel->show();
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| 137 | else
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| 138 | d_data->titleLabel->hide();
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| 139 | }
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| 140 | }
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| 141 |
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| 142 | //! \return the plot's title
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| 143 | QwtText QwtPolarPlot::title() const
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| 144 | {
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| 145 | return d_data->titleLabel->text();
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| 146 | }
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| 147 |
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| 148 | //! \return the plot's title
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| 149 | QwtTextLabel *QwtPolarPlot::titleLabel()
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| 150 | {
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| 151 | return d_data->titleLabel;
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| 152 | }
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| 153 |
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| 154 | //! \return the plot's titel label.
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| 155 | const QwtTextLabel *QwtPolarPlot::titleLabel() const
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| 156 | {
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| 157 | return d_data->titleLabel;
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| 158 | }
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| 159 |
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| 160 | /*!
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| 161 | \brief Insert a legend
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| 162 |
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| 163 | If the position legend is \c QwtPolarPlot::LeftLegend or \c QwtPolarPlot::RightLegend
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| 164 | the legend will be organized in one column from top to down.
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| 165 | Otherwise the legend items will be placed in a table
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| 166 | with a best fit number of columns from left to right.
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| 167 |
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| 168 | If pos != QwtPolarPlot::ExternalLegend the plot widget will become
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| 169 | parent of the legend. It will be deleted when the plot is deleted,
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| 170 | or another legend is set with insertLegend().
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| 171 |
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| 172 | \param legend Legend
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| 173 | \param pos The legend's position. For top/left position the number
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| 174 | of colums will be limited to 1, otherwise it will be set to
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| 175 | unlimited.
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| 176 |
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| 177 | \param ratio Ratio between legend and the bounding rect
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| 178 | of title, canvas and axes. The legend will be shrinked
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| 179 | if it would need more space than the given ratio.
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| 180 | The ratio is limited to ]0.0 .. 1.0]. In case of <= 0.0
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| 181 | it will be reset to the default ratio.
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| 182 | The default vertical/horizontal ratio is 0.33/0.5.
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| 183 |
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| 184 | \sa legend(), QwtPolarLayout::legendPosition(),
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| 185 | QwtPolarLayout::setLegendPosition()
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| 186 | */
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[8127] | 187 | void QwtPolarPlot::insertLegend( QwtAbstractLegend *legend,
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[4272] | 188 | QwtPolarPlot::LegendPosition pos, double ratio )
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| 189 | {
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| 190 | d_data->layout->setLegendPosition( pos, ratio );
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[8127] | 191 |
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[4272] | 192 | if ( legend != d_data->legend )
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| 193 | {
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| 194 | if ( d_data->legend && d_data->legend->parent() == this )
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| 195 | delete d_data->legend;
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| 196 |
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| 197 | d_data->legend = legend;
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| 198 |
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| 199 | if ( d_data->legend )
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| 200 | {
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[8127] | 201 | connect( this,
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| 202 | SIGNAL( legendDataChanged(
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| 203 | const QVariant &, const QList<QwtLegendData> & ) ),
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| 204 | d_data->legend,
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| 205 | SLOT( updateLegend(
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| 206 | const QVariant &, const QList<QwtLegendData> & ) )
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| 207 | );
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[4272] | 208 |
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[8127] | 209 | if ( d_data->legend->parent() != this )
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| 210 | d_data->legend->setParent( this );
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[4272] | 211 |
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[8127] | 212 | updateLegend();
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[4272] | 213 |
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[8127] | 214 | QwtLegend *lgd = qobject_cast<QwtLegend *>( legend );
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| 215 | if ( lgd )
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[4272] | 216 | {
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[8127] | 217 | switch ( d_data->layout->legendPosition() )
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[4272] | 218 | {
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| 219 | case LeftLegend:
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| 220 | case RightLegend:
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[8127] | 221 | {
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| 222 | if ( lgd->maxColumns() == 0 )
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| 223 | lgd->setMaxColumns( 1 ); // 1 column: align vertical
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[4272] | 224 | break;
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[8127] | 225 | }
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[4272] | 226 | case TopLegend:
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| 227 | case BottomLegend:
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[8127] | 228 | {
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| 229 | lgd->setMaxColumns( 0 ); // unlimited
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[4272] | 230 | break;
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[8127] | 231 | }
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| 232 | default:
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[4272] | 233 | break;
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| 234 | }
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| 235 | }
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[8127] | 236 |
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[4272] | 237 | }
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| 238 | }
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[8127] | 239 |
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[4272] | 240 | updateLayout();
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| 241 | }
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| 242 |
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| 243 | /*!
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[8127] | 244 | Emit legendDataChanged() for all plot item
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| 245 |
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| 246 | \sa QwtPlotItem::legendData(), legendDataChanged()
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| 247 | */
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| 248 | void QwtPolarPlot::updateLegend()
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[4272] | 249 | {
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[8127] | 250 | const QwtPolarItemList& itmList = itemList();
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| 251 | for ( QwtPolarItemIterator it = itmList.begin();
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| 252 | it != itmList.end(); ++it )
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| 253 | {
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| 254 | updateLegend( *it );
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| 255 | }
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[4272] | 256 | }
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| 257 |
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| 258 | /*!
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[8127] | 259 | Emit legendDataChanged() for a plot item
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| 260 |
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| 261 | \param plotItem Plot item
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| 262 | \sa QwtPlotItem::legendData(), legendDataChanged()
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| 263 | */
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| 264 | void QwtPolarPlot::updateLegend( const QwtPolarItem *plotItem )
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[4272] | 265 | {
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[8127] | 266 | if ( plotItem == NULL )
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| 267 | return;
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| 268 |
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| 269 | QList<QwtLegendData> legendData;
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| 270 |
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| 271 | if ( plotItem->testItemAttribute( QwtPolarItem::Legend ) )
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| 272 | legendData = plotItem->legendData();
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| 273 |
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| 274 | const QVariant itemInfo = itemToInfo( const_cast< QwtPolarItem *>( plotItem) );
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| 275 | Q_EMIT legendDataChanged( itemInfo, legendData );
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[4272] | 276 | }
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| 277 |
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| 278 | /*!
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[8127] | 279 | \return the plot's legend
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| 280 | \sa insertLegend()
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[4272] | 281 | */
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[8127] | 282 | QwtAbstractLegend *QwtPolarPlot::legend()
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[4272] | 283 | {
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[8127] | 284 | return d_data->legend;
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[4272] | 285 | }
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| 286 |
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| 287 | /*!
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[8127] | 288 | \return the plot's legend
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| 289 | \sa insertLegend()
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[4272] | 290 | */
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[8127] | 291 | const QwtAbstractLegend *QwtPolarPlot::legend() const
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[4272] | 292 | {
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[8127] | 293 | return d_data->legend;
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[4272] | 294 | }
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| 295 |
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| 296 | /*!
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| 297 | \brief Set the background of the plot area
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| 298 |
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| 299 | The plot area is the circle around the pole. It's radius
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| 300 | is defined by the radial scale.
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| 301 |
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| 302 | \param brush Background Brush
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| 303 | \sa plotBackground(), plotArea()
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| 304 | */
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| 305 | void QwtPolarPlot::setPlotBackground( const QBrush &brush )
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| 306 | {
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| 307 | if ( brush != d_data->canvasBrush )
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| 308 | {
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| 309 | d_data->canvasBrush = brush;
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| 310 | autoRefresh();
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| 311 | }
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| 312 | }
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| 313 |
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| 314 | /*!
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| 315 | \return plot background brush
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| 316 | \sa plotBackground(), plotArea()
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| 317 | */
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| 318 | const QBrush &QwtPolarPlot::plotBackground() const
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| 319 | {
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| 320 | return d_data->canvasBrush;
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| 321 | }
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| 322 |
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| 323 | /*!
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| 324 | \brief Set or reset the autoReplot option
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| 325 |
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| 326 | If the autoReplot option is set, the plot will be
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| 327 | updated implicitly by manipulating member functions.
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| 328 | Since this may be time-consuming, it is recommended
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| 329 | to leave this option switched off and call replot()
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| 330 | explicitly if necessary.
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| 331 |
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| 332 | The autoReplot option is set to false by default, which
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| 333 | means that the user has to call replot() in order to make
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| 334 | changes visible.
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| 335 | \param enable \c true or \c false. Defaults to \c true.
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| 336 | \sa replot()
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| 337 | */
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| 338 | void QwtPolarPlot::setAutoReplot( bool enable )
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| 339 | {
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| 340 | d_data->autoReplot = enable;
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| 341 | }
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| 342 |
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| 343 | //! \return true if the autoReplot option is set.
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| 344 | bool QwtPolarPlot::autoReplot() const
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| 345 | {
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| 346 | return d_data->autoReplot;
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| 347 | }
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| 348 |
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| 349 | /*!
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| 350 | \brief Enable autoscaling
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| 351 |
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| 352 | This member function is used to switch back to autoscaling mode
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| 353 | after a fixed scale has been set. Autoscaling calculates a useful
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| 354 | scale division from the bounding interval of all plot items with
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| 355 | the QwtPolarItem::AutoScale attribute.
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| 356 |
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| 357 | Autoscaling is only supported for the radial scale and enabled as default.
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| 358 |
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| 359 | \param scaleId Scale index
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| 360 |
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| 361 | \sa hasAutoScale(), setScale(), setScaleDiv(),
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| 362 | QwtPolarItem::boundingInterval()
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| 363 | */
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| 364 | void QwtPolarPlot::setAutoScale( int scaleId )
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| 365 | {
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| 366 | if ( scaleId != QwtPolar::ScaleRadius )
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| 367 | return;
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| 368 |
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| 369 | ScaleData &scaleData = d_data->scaleData[scaleId];
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| 370 | if ( !scaleData.doAutoScale )
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| 371 | {
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| 372 | scaleData.doAutoScale = true;
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| 373 | autoRefresh();
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| 374 | }
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| 375 | }
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| 376 |
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| 377 | /*!
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| 378 | \return \c true if autoscaling is enabled
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| 379 | \param scaleId Scale index
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| 380 | \sa setAutoScale()
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| 381 | */
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| 382 | bool QwtPolarPlot::hasAutoScale( int scaleId ) const
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| 383 | {
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| 384 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
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| 385 | return false;
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| 386 |
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| 387 | return d_data->scaleData[scaleId].doAutoScale;
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| 388 | }
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| 389 |
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| 390 | /*!
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| 391 | Set the maximum number of major scale intervals for a specified scale
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| 392 |
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| 393 | \param scaleId Scale index
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| 394 | \param maxMinor maximum number of minor steps
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| 395 | \sa scaleMaxMajor()
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| 396 | */
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| 397 | void QwtPolarPlot::setScaleMaxMinor( int scaleId, int maxMinor )
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| 398 | {
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| 399 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
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| 400 | return;
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| 401 |
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[8127] | 402 | maxMinor = qBound( 0, maxMinor, 100 );
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[4272] | 403 |
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| 404 | ScaleData &scaleData = d_data->scaleData[scaleId];
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| 405 |
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| 406 | if ( maxMinor != scaleData.maxMinor )
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| 407 | {
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| 408 | scaleData.maxMinor = maxMinor;
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[8127] | 409 | scaleData.isValid = false;
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[4272] | 410 | autoRefresh();
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| 411 | }
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| 412 | }
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| 413 |
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| 414 | /*!
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| 415 | \return the maximum number of minor ticks for a specified axis
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| 416 | \param scaleId Scale index
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| 417 | \sa setScaleMaxMinor()
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| 418 | */
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| 419 | int QwtPolarPlot::scaleMaxMinor( int scaleId ) const
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| 420 | {
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| 421 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
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| 422 | return 0;
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| 423 |
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| 424 | return d_data->scaleData[scaleId].maxMinor;
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| 425 | }
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| 426 |
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| 427 | /*!
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| 428 | Set the maximum number of major scale intervals for a specified scale
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| 429 |
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| 430 | \param scaleId Scale index
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| 431 | \param maxMajor maximum number of major steps
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| 432 | \sa scaleMaxMajor()
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| 433 | */
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| 434 | void QwtPolarPlot::setScaleMaxMajor( int scaleId, int maxMajor )
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| 435 | {
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| 436 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
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| 437 | return;
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| 438 |
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[8127] | 439 | maxMajor = qBound( 1, maxMajor, 10000 );
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[4272] | 440 |
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| 441 | ScaleData &scaleData = d_data->scaleData[scaleId];
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| 442 | if ( maxMajor != scaleData.maxMinor )
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| 443 | {
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| 444 | scaleData.maxMajor = maxMajor;
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[8127] | 445 | scaleData.isValid = false;
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[4272] | 446 | autoRefresh();
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| 447 | }
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| 448 | }
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| 449 |
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| 450 | /*!
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| 451 | \return the maximum number of major ticks for a specified axis
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| 452 | \param scaleId Scale index
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| 453 |
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| 454 | \sa setScaleMaxMajor()
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| 455 | */
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| 456 | int QwtPolarPlot::scaleMaxMajor( int scaleId ) const
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| 457 | {
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| 458 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
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| 459 | return 0;
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| 460 |
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| 461 | return d_data->scaleData[scaleId].maxMajor;
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| 462 | }
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| 463 |
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| 464 | /*!
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| 465 | Change the scale engine for an axis
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| 466 |
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| 467 | \param scaleId Scale index
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| 468 | \param scaleEngine Scale engine
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| 469 |
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| 470 | \sa axisScaleEngine()
|
---|
| 471 | */
|
---|
| 472 | void QwtPolarPlot::setScaleEngine( int scaleId, QwtScaleEngine *scaleEngine )
|
---|
| 473 | {
|
---|
| 474 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 475 | return;
|
---|
| 476 |
|
---|
| 477 | ScaleData &scaleData = d_data->scaleData[scaleId];
|
---|
| 478 | if ( scaleEngine == NULL || scaleEngine == scaleData.scaleEngine )
|
---|
| 479 | return;
|
---|
| 480 |
|
---|
| 481 | delete scaleData.scaleEngine;
|
---|
| 482 | scaleData.scaleEngine = scaleEngine;
|
---|
| 483 |
|
---|
[8127] | 484 | scaleData.isValid = false;
|
---|
[4272] | 485 |
|
---|
| 486 | autoRefresh();
|
---|
| 487 | }
|
---|
| 488 |
|
---|
| 489 | /*!
|
---|
| 490 | \return Scale engine for a specific scale
|
---|
| 491 |
|
---|
| 492 | \param scaleId Scale index
|
---|
| 493 | \sa setScaleEngine()
|
---|
| 494 | */
|
---|
| 495 | QwtScaleEngine *QwtPolarPlot::scaleEngine( int scaleId )
|
---|
| 496 | {
|
---|
| 497 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 498 | return NULL;
|
---|
| 499 |
|
---|
| 500 | return d_data->scaleData[scaleId].scaleEngine;
|
---|
| 501 | }
|
---|
| 502 |
|
---|
| 503 | /*!
|
---|
| 504 | \return Scale engine for a specific scale
|
---|
| 505 |
|
---|
| 506 | \param scaleId Scale index
|
---|
| 507 | \sa setScaleEngine()
|
---|
| 508 | */
|
---|
| 509 | const QwtScaleEngine *QwtPolarPlot::scaleEngine( int scaleId ) const
|
---|
| 510 | {
|
---|
| 511 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 512 | return NULL;
|
---|
| 513 |
|
---|
| 514 | return d_data->scaleData[scaleId].scaleEngine;
|
---|
| 515 | }
|
---|
| 516 |
|
---|
| 517 | /*!
|
---|
| 518 | \brief Disable autoscaling and specify a fixed scale for a selected scale.
|
---|
| 519 | \param scaleId Scale index
|
---|
| 520 | \param min
|
---|
| 521 | \param max minimum and maximum of the scale
|
---|
| 522 | \param stepSize Major step size. If <code>step == 0</code>, the step size is
|
---|
| 523 | calculated automatically using the maxMajor setting.
|
---|
| 524 | \sa setScaleMaxMajor(), setAutoScale()
|
---|
| 525 | */
|
---|
| 526 | void QwtPolarPlot::setScale( int scaleId,
|
---|
| 527 | double min, double max, double stepSize )
|
---|
| 528 | {
|
---|
| 529 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 530 | return;
|
---|
| 531 |
|
---|
| 532 | ScaleData &scaleData = d_data->scaleData[scaleId];
|
---|
| 533 |
|
---|
[8127] | 534 | scaleData.isValid = false;
|
---|
[4272] | 535 |
|
---|
| 536 | scaleData.minValue = min;
|
---|
| 537 | scaleData.maxValue = max;
|
---|
| 538 | scaleData.stepSize = stepSize;
|
---|
| 539 | scaleData.doAutoScale = false;
|
---|
| 540 |
|
---|
| 541 | autoRefresh();
|
---|
| 542 | }
|
---|
| 543 |
|
---|
| 544 | /*!
|
---|
| 545 | \brief Disable autoscaling and specify a fixed scale for a selected scale.
|
---|
| 546 | \param scaleId Scale index
|
---|
| 547 | \param scaleDiv Scale division
|
---|
| 548 | \sa setScale(), setAutoScale()
|
---|
| 549 | */
|
---|
| 550 | void QwtPolarPlot::setScaleDiv( int scaleId, const QwtScaleDiv &scaleDiv )
|
---|
| 551 | {
|
---|
| 552 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 553 | return;
|
---|
| 554 |
|
---|
| 555 | ScaleData &scaleData = d_data->scaleData[scaleId];
|
---|
| 556 |
|
---|
| 557 | scaleData.scaleDiv = scaleDiv;
|
---|
[8127] | 558 | scaleData.isValid = true;
|
---|
[4272] | 559 | scaleData.doAutoScale = false;
|
---|
| 560 |
|
---|
| 561 | autoRefresh();
|
---|
| 562 | }
|
---|
| 563 |
|
---|
| 564 | /*!
|
---|
| 565 | \brief Return the scale division of a specified scale
|
---|
| 566 |
|
---|
| 567 | scaleDiv(scaleId)->lBound(), scaleDiv(scaleId)->hBound()
|
---|
| 568 | are the current limits of the scale.
|
---|
| 569 |
|
---|
| 570 | \param scaleId Scale index
|
---|
| 571 | \return Scale division
|
---|
| 572 |
|
---|
| 573 | \sa QwtScaleDiv, setScaleDiv(), setScale()
|
---|
| 574 | */
|
---|
| 575 | const QwtScaleDiv *QwtPolarPlot::scaleDiv( int scaleId ) const
|
---|
| 576 | {
|
---|
| 577 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 578 | return NULL;
|
---|
| 579 |
|
---|
| 580 | return &d_data->scaleData[scaleId].scaleDiv;
|
---|
| 581 | }
|
---|
| 582 |
|
---|
| 583 | /*!
|
---|
| 584 | \brief Return the scale division of a specified scale
|
---|
| 585 |
|
---|
| 586 | scaleDiv(scaleId)->lBound(), scaleDiv(scaleId)->hBound()
|
---|
| 587 | are the current limits of the scale.
|
---|
| 588 |
|
---|
| 589 | \param scaleId Scale index
|
---|
| 590 | \return Scale division
|
---|
| 591 |
|
---|
| 592 | \sa QwtScaleDiv, setScaleDiv(), setScale()
|
---|
| 593 | */
|
---|
| 594 | QwtScaleDiv *QwtPolarPlot::scaleDiv( int scaleId )
|
---|
| 595 | {
|
---|
| 596 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 597 | return NULL;
|
---|
| 598 |
|
---|
| 599 | return &d_data->scaleData[scaleId].scaleDiv;
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | /*!
|
---|
| 603 | \brief Change the origin of the azimuth scale
|
---|
| 604 |
|
---|
| 605 | The azimuth origin is the angle where the azimuth scale
|
---|
| 606 | shows the value 0.0. The default origin is 0.0.
|
---|
| 607 |
|
---|
| 608 | \param origin New origin
|
---|
| 609 | \sa azimuthOrigin()
|
---|
| 610 | */
|
---|
| 611 | void QwtPolarPlot::setAzimuthOrigin( double origin )
|
---|
| 612 | {
|
---|
| 613 | origin = ::fmod( origin, 2 * M_PI );
|
---|
| 614 | if ( origin != d_data->azimuthOrigin )
|
---|
| 615 | {
|
---|
| 616 | d_data->azimuthOrigin = origin;
|
---|
| 617 | autoRefresh();
|
---|
| 618 | }
|
---|
| 619 | }
|
---|
| 620 |
|
---|
| 621 | /*!
|
---|
| 622 | The azimuth origin is the angle where the azimuth scale
|
---|
| 623 | shows the value 0.0.
|
---|
| 624 |
|
---|
| 625 | \return Origin of the azimuth scale
|
---|
| 626 | \sa setAzimuthOrigin()
|
---|
| 627 | */
|
---|
| 628 | double QwtPolarPlot::azimuthOrigin() const
|
---|
| 629 | {
|
---|
| 630 | return d_data->azimuthOrigin;
|
---|
| 631 | }
|
---|
| 632 |
|
---|
| 633 | /*!
|
---|
| 634 | \brief Translate and in/decrease the zoom factor
|
---|
| 635 |
|
---|
| 636 | In zoom mode the zoom position is in the center of the
|
---|
| 637 | canvas. The radius of the circle depends on the size of the plot canvas,
|
---|
| 638 | that is devided by the zoom factor. Thus a factor < 1.0 zoom in.
|
---|
| 639 |
|
---|
| 640 | Setting an invalid zoom position disables zooming.
|
---|
| 641 |
|
---|
| 642 | \param zoomPos Center of the translation
|
---|
| 643 | \param zoomFactor Zoom factor
|
---|
| 644 |
|
---|
| 645 | \sa unzoom(), zoomPos(), zoomFactor()
|
---|
| 646 | */
|
---|
| 647 | void QwtPolarPlot::zoom( const QwtPointPolar &zoomPos, double zoomFactor )
|
---|
| 648 | {
|
---|
| 649 | zoomFactor = qAbs( zoomFactor );
|
---|
| 650 | if ( zoomPos != d_data->zoomPos ||
|
---|
| 651 | zoomFactor != d_data->zoomFactor )
|
---|
| 652 | {
|
---|
| 653 | d_data->zoomPos = zoomPos;
|
---|
| 654 | d_data->zoomFactor = zoomFactor;
|
---|
| 655 | updateLayout();
|
---|
| 656 | autoRefresh();
|
---|
| 657 | }
|
---|
| 658 | }
|
---|
| 659 |
|
---|
| 660 | /*!
|
---|
| 661 | Unzoom the plot
|
---|
| 662 | \sa zoom()
|
---|
| 663 | */
|
---|
| 664 | void QwtPolarPlot::unzoom()
|
---|
| 665 | {
|
---|
| 666 | if ( d_data->zoomFactor != 1.0 || d_data->zoomPos.isValid() )
|
---|
| 667 | {
|
---|
| 668 | d_data->zoomFactor = 1.0;
|
---|
| 669 | d_data->zoomPos = QwtPointPolar();
|
---|
| 670 | autoRefresh();
|
---|
| 671 | }
|
---|
| 672 | }
|
---|
| 673 |
|
---|
| 674 | /*!
|
---|
| 675 | \return Zoom position
|
---|
| 676 | \sa zoom(), zoomFactor()
|
---|
| 677 | */
|
---|
| 678 | QwtPointPolar QwtPolarPlot::zoomPos() const
|
---|
| 679 | {
|
---|
| 680 | return d_data->zoomPos;
|
---|
| 681 | }
|
---|
| 682 |
|
---|
| 683 | /*!
|
---|
| 684 | \return Zoom factor
|
---|
| 685 | \sa zoom(), zoomPos()
|
---|
| 686 | */
|
---|
| 687 | double QwtPolarPlot::zoomFactor() const
|
---|
| 688 | {
|
---|
| 689 | return d_data->zoomFactor;
|
---|
| 690 | }
|
---|
| 691 |
|
---|
| 692 | /*!
|
---|
| 693 | Build a scale map
|
---|
| 694 |
|
---|
| 695 | The azimuth map translates between the scale values and angles from
|
---|
| 696 | [0.0, 2 * PI[. The radial map translates scale values into the distance
|
---|
| 697 | from the pole. The radial map is calculated from the current geometry
|
---|
| 698 | of the canvas.
|
---|
| 699 |
|
---|
| 700 | \param scaleId Scale index
|
---|
| 701 | \return Map for the scale on the canvas. With this map pixel coordinates can
|
---|
| 702 | translated to plot coordinates and vice versa.
|
---|
| 703 |
|
---|
| 704 | \sa QwtScaleMap, transform(), invTransform()
|
---|
| 705 | */
|
---|
| 706 | QwtScaleMap QwtPolarPlot::scaleMap( int scaleId ) const
|
---|
| 707 | {
|
---|
| 708 | const QRectF pr = plotRect();
|
---|
| 709 | return scaleMap( scaleId, pr.width() / 2.0 );
|
---|
| 710 | }
|
---|
| 711 |
|
---|
| 712 | /*!
|
---|
| 713 | Build a scale map
|
---|
| 714 |
|
---|
| 715 | The azimuth map translates between the scale values and angles from
|
---|
| 716 | [0.0, 2 * PI[. The radial map translates scale values into the distance
|
---|
| 717 | from the pole.
|
---|
| 718 |
|
---|
| 719 | \param scaleId Scale index
|
---|
| 720 | \param radius Radius of the plot are in pixels
|
---|
| 721 | \return Map for the scale on the canvas. With this map pixel coordinates can
|
---|
| 722 | translated to plot coordinates and vice versa.
|
---|
| 723 |
|
---|
| 724 | \sa QwtScaleMap, transform(), invTransform()
|
---|
| 725 | */
|
---|
| 726 | QwtScaleMap QwtPolarPlot::scaleMap( int scaleId, const double radius ) const
|
---|
| 727 | {
|
---|
| 728 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 729 | return QwtScaleMap();
|
---|
| 730 |
|
---|
| 731 | QwtScaleMap map;
|
---|
| 732 | map.setTransformation( scaleEngine( scaleId )->transformation() );
|
---|
| 733 |
|
---|
| 734 | const QwtScaleDiv *sd = scaleDiv( scaleId );
|
---|
| 735 | map.setScaleInterval( sd->lowerBound(), sd->upperBound() );
|
---|
| 736 |
|
---|
| 737 | if ( scaleId == QwtPolar::Azimuth )
|
---|
| 738 | {
|
---|
| 739 | map.setPaintInterval( d_data->azimuthOrigin,
|
---|
[8127] | 740 | d_data->azimuthOrigin + 2 * M_PI );
|
---|
[4272] | 741 | }
|
---|
| 742 | else
|
---|
| 743 | {
|
---|
| 744 | map.setPaintInterval( 0.0, radius );
|
---|
| 745 | }
|
---|
| 746 |
|
---|
| 747 | return map;
|
---|
| 748 | }
|
---|
| 749 |
|
---|
| 750 | /*!
|
---|
| 751 | \brief Qt event handler
|
---|
| 752 |
|
---|
| 753 | Handles QEvent::LayoutRequest and QEvent::PolishRequest
|
---|
| 754 |
|
---|
| 755 | \param e Qt Event
|
---|
| 756 | \return True, when the event was processed
|
---|
| 757 | */
|
---|
| 758 | bool QwtPolarPlot::event( QEvent *e )
|
---|
| 759 | {
|
---|
| 760 | bool ok = QWidget::event( e );
|
---|
| 761 | switch( e->type() )
|
---|
| 762 | {
|
---|
| 763 | case QEvent::LayoutRequest:
|
---|
| 764 | {
|
---|
| 765 | updateLayout();
|
---|
| 766 | break;
|
---|
| 767 | }
|
---|
| 768 | case QEvent::PolishRequest:
|
---|
| 769 | {
|
---|
| 770 | updateLayout();
|
---|
| 771 | replot();
|
---|
| 772 | break;
|
---|
| 773 | }
|
---|
| 774 | default:;
|
---|
| 775 | }
|
---|
| 776 | return ok;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | //! Resize and update internal layout
|
---|
| 780 | void QwtPolarPlot::resizeEvent( QResizeEvent *e )
|
---|
| 781 | {
|
---|
| 782 | QFrame::resizeEvent( e );
|
---|
| 783 | updateLayout();
|
---|
| 784 | }
|
---|
| 785 |
|
---|
| 786 | void QwtPolarPlot::initPlot( const QwtText &title )
|
---|
| 787 | {
|
---|
| 788 | d_data = new PrivateData;
|
---|
| 789 | d_data->layout = new QwtPolarLayout;
|
---|
| 790 |
|
---|
| 791 | QwtText text( title );
|
---|
| 792 | text.setRenderFlags( Qt::AlignCenter | Qt::TextWordWrap );
|
---|
| 793 |
|
---|
| 794 | d_data->titleLabel = new QwtTextLabel( text, this );
|
---|
| 795 | d_data->titleLabel->setFont( QFont( fontInfo().family(), 14, QFont::Bold ) );
|
---|
| 796 | if ( !text.isEmpty() )
|
---|
| 797 | d_data->titleLabel->show();
|
---|
| 798 | else
|
---|
| 799 | d_data->titleLabel->hide();
|
---|
| 800 |
|
---|
| 801 | d_data->canvas = new QwtPolarCanvas( this );
|
---|
| 802 |
|
---|
| 803 | d_data->autoReplot = false;
|
---|
| 804 | d_data->canvasBrush = QBrush( Qt::white );
|
---|
| 805 |
|
---|
| 806 | for ( int scaleId = 0; scaleId < QwtPolar::ScaleCount; scaleId++ )
|
---|
| 807 | {
|
---|
| 808 | ScaleData &scaleData = d_data->scaleData[scaleId];
|
---|
| 809 |
|
---|
| 810 | if ( scaleId == QwtPolar::Azimuth )
|
---|
| 811 | {
|
---|
| 812 | scaleData.minValue = 0.0;
|
---|
| 813 | scaleData.maxValue = 360.0;
|
---|
| 814 | scaleData.stepSize = 30.0;
|
---|
| 815 | }
|
---|
| 816 | else
|
---|
| 817 | {
|
---|
| 818 | scaleData.minValue = 0.0;
|
---|
| 819 | scaleData.maxValue = 1000.0;
|
---|
| 820 | scaleData.stepSize = 0.0;
|
---|
| 821 | }
|
---|
| 822 |
|
---|
| 823 | scaleData.doAutoScale = true;
|
---|
| 824 |
|
---|
| 825 | scaleData.maxMinor = 5;
|
---|
| 826 | scaleData.maxMajor = 8;
|
---|
| 827 |
|
---|
[8127] | 828 | scaleData.isValid = false;
|
---|
| 829 |
|
---|
[4272] | 830 | scaleData.scaleEngine = new QwtLinearScaleEngine;
|
---|
| 831 | }
|
---|
| 832 | d_data->zoomFactor = 1.0;
|
---|
| 833 | d_data->azimuthOrigin = 0.0;
|
---|
| 834 |
|
---|
| 835 | setSizePolicy( QSizePolicy::MinimumExpanding,
|
---|
| 836 | QSizePolicy::MinimumExpanding );
|
---|
| 837 |
|
---|
| 838 | for ( int scaleId = 0; scaleId < QwtPolar::ScaleCount; scaleId++ )
|
---|
| 839 | updateScale( scaleId );
|
---|
| 840 | }
|
---|
| 841 |
|
---|
| 842 | //! Replots the plot if QwtPlot::autoReplot() is \c true.
|
---|
| 843 | void QwtPolarPlot::autoRefresh()
|
---|
| 844 | {
|
---|
| 845 | if ( d_data->autoReplot )
|
---|
| 846 | replot();
|
---|
| 847 | }
|
---|
| 848 |
|
---|
| 849 | //! Rebuild the layout
|
---|
| 850 | void QwtPolarPlot::updateLayout()
|
---|
| 851 | {
|
---|
| 852 | d_data->layout->activate( this, contentsRect() );
|
---|
| 853 |
|
---|
| 854 | // resize and show the visible widgets
|
---|
| 855 | if ( d_data->titleLabel )
|
---|
| 856 | {
|
---|
| 857 | if ( !d_data->titleLabel->text().isEmpty() )
|
---|
| 858 | {
|
---|
| 859 | d_data->titleLabel->setGeometry( d_data->layout->titleRect().toRect() );
|
---|
| 860 | if ( !d_data->titleLabel->isVisible() )
|
---|
| 861 | d_data->titleLabel->show();
|
---|
| 862 | }
|
---|
| 863 | else
|
---|
| 864 | d_data->titleLabel->hide();
|
---|
| 865 | }
|
---|
| 866 |
|
---|
[8127] | 867 | if ( d_data->legend )
|
---|
[4272] | 868 | {
|
---|
[8127] | 869 | if ( d_data->legend->isEmpty() )
|
---|
[4272] | 870 | {
|
---|
[8127] | 871 | d_data->legend->hide();
|
---|
| 872 | }
|
---|
| 873 | else
|
---|
| 874 | {
|
---|
| 875 | const QRectF legendRect = d_data->layout->legendRect();
|
---|
| 876 | d_data->legend->setGeometry( legendRect.toRect() );
|
---|
[4272] | 877 | d_data->legend->show();
|
---|
| 878 | }
|
---|
| 879 | }
|
---|
| 880 |
|
---|
| 881 | d_data->canvas->setGeometry( d_data->layout->canvasRect().toRect() );
|
---|
| 882 | Q_EMIT layoutChanged();
|
---|
| 883 | }
|
---|
| 884 |
|
---|
| 885 | /*!
|
---|
| 886 | \brief Redraw the plot
|
---|
| 887 |
|
---|
| 888 | If the autoReplot option is not set (which is the default)
|
---|
| 889 | or if any curves are attached to raw data, the plot has to
|
---|
| 890 | be refreshed explicitly in order to make changes visible.
|
---|
| 891 |
|
---|
| 892 | \sa setAutoReplot()
|
---|
| 893 | \warning Calls canvas()->repaint, take care of infinite recursions
|
---|
| 894 | */
|
---|
| 895 | void QwtPolarPlot::replot()
|
---|
| 896 | {
|
---|
| 897 | bool doAutoReplot = autoReplot();
|
---|
| 898 | setAutoReplot( false );
|
---|
| 899 |
|
---|
| 900 | for ( int scaleId = 0; scaleId < QwtPolar::ScaleCount; scaleId++ )
|
---|
| 901 | updateScale( scaleId );
|
---|
| 902 |
|
---|
| 903 | d_data->canvas->invalidateBackingStore();
|
---|
| 904 | d_data->canvas->repaint();
|
---|
| 905 |
|
---|
| 906 | setAutoReplot( doAutoReplot );
|
---|
| 907 | }
|
---|
| 908 |
|
---|
| 909 | //! \return the plot's canvas
|
---|
| 910 | QwtPolarCanvas *QwtPolarPlot::canvas()
|
---|
| 911 | {
|
---|
| 912 | return d_data->canvas;
|
---|
| 913 | }
|
---|
| 914 |
|
---|
| 915 | //! \return the plot's canvas
|
---|
| 916 | const QwtPolarCanvas *QwtPolarPlot::canvas() const
|
---|
| 917 | {
|
---|
| 918 | return d_data->canvas;
|
---|
| 919 | }
|
---|
| 920 |
|
---|
| 921 | /*!
|
---|
| 922 | Redraw the canvas.
|
---|
| 923 | \param painter Painter used for drawing
|
---|
| 924 | \param canvasRect Contents rect of the canvas
|
---|
| 925 | */
|
---|
| 926 | void QwtPolarPlot::drawCanvas( QPainter *painter,
|
---|
| 927 | const QRectF &canvasRect ) const
|
---|
| 928 | {
|
---|
| 929 | const QRectF cr = canvasRect;
|
---|
| 930 | const QRectF pr = plotRect( cr );
|
---|
| 931 |
|
---|
| 932 | const double radius = pr.width() / 2.0;
|
---|
| 933 |
|
---|
| 934 | if ( d_data->canvasBrush.style() != Qt::NoBrush )
|
---|
| 935 | {
|
---|
| 936 | painter->save();
|
---|
| 937 | painter->setPen( Qt::NoPen );
|
---|
| 938 | painter->setBrush( d_data->canvasBrush );
|
---|
| 939 |
|
---|
| 940 | if ( qwtDistance( pr.center(), cr.topLeft() ) < radius &&
|
---|
| 941 | qwtDistance( pr.center(), cr.topRight() ) < radius &&
|
---|
| 942 | qwtDistance( pr.center(), cr.bottomRight() ) < radius &&
|
---|
| 943 | qwtDistance( pr.center(), cr.bottomLeft() ) < radius )
|
---|
| 944 | {
|
---|
| 945 | QwtPainter::drawRect( painter, cr );
|
---|
| 946 | }
|
---|
| 947 | else
|
---|
| 948 | {
|
---|
| 949 | painter->setRenderHint( QPainter::Antialiasing, true );
|
---|
| 950 | QwtPainter::drawEllipse( painter, pr );
|
---|
| 951 | }
|
---|
| 952 | painter->restore();
|
---|
| 953 | }
|
---|
| 954 |
|
---|
| 955 | drawItems( painter,
|
---|
| 956 | scaleMap( QwtPolar::Azimuth, radius ),
|
---|
| 957 | scaleMap( QwtPolar::Radius, radius ),
|
---|
| 958 | pr.center(), radius, canvasRect );
|
---|
| 959 | }
|
---|
| 960 |
|
---|
| 961 | /*!
|
---|
| 962 | Redraw the canvas items.
|
---|
| 963 |
|
---|
| 964 | \param painter Painter used for drawing
|
---|
| 965 | \param azimuthMap Maps azimuth values to values related to 0.0, M_2PI
|
---|
| 966 | \param radialMap Maps radius values into painter coordinates.
|
---|
| 967 | \param pole Position of the pole in painter coordinates
|
---|
| 968 | \param radius Radius of the complete plot area in painter coordinates
|
---|
| 969 | \param canvasRect Contents rect of the canvas in painter coordinates
|
---|
| 970 | */
|
---|
| 971 | void QwtPolarPlot::drawItems( QPainter *painter,
|
---|
| 972 | const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
|
---|
| 973 | const QPointF &pole, double radius,
|
---|
| 974 | const QRectF &canvasRect ) const
|
---|
| 975 | {
|
---|
| 976 | const QRectF pr = plotRect( canvasRect );
|
---|
| 977 |
|
---|
| 978 | const QwtPolarItemList& itmList = itemList();
|
---|
| 979 | for ( QwtPolarItemIterator it = itmList.begin();
|
---|
| 980 | it != itmList.end(); ++it )
|
---|
| 981 | {
|
---|
| 982 | QwtPolarItem *item = *it;
|
---|
| 983 | if ( item && item->isVisible() )
|
---|
| 984 | {
|
---|
| 985 | painter->save();
|
---|
| 986 |
|
---|
| 987 | // Unfortunately circular clipping slows down
|
---|
| 988 | // painting a lot. So we better try to avoid it.
|
---|
| 989 |
|
---|
| 990 | bool doClipping = false;
|
---|
| 991 | if ( item->rtti() != QwtPolarItem::Rtti_PolarGrid )
|
---|
| 992 | {
|
---|
| 993 | const QwtInterval intv =
|
---|
| 994 | item->boundingInterval( QwtPolar::Radius );
|
---|
| 995 |
|
---|
| 996 | if ( !intv.isValid() )
|
---|
| 997 | doClipping = true;
|
---|
| 998 | else
|
---|
| 999 | {
|
---|
| 1000 | if ( radialMap.s1() < radialMap.s2() )
|
---|
| 1001 | doClipping = intv.maxValue() > radialMap.s2();
|
---|
| 1002 | else
|
---|
| 1003 | doClipping = intv.minValue() < radialMap.s2();
|
---|
| 1004 | }
|
---|
| 1005 | }
|
---|
| 1006 |
|
---|
| 1007 | if ( doClipping )
|
---|
| 1008 | {
|
---|
| 1009 | const int margin = item->marginHint();
|
---|
| 1010 |
|
---|
| 1011 | const QRectF clipRect = pr.adjusted(
|
---|
| 1012 | -margin, -margin, margin, margin );
|
---|
| 1013 | if ( !clipRect.contains( canvasRect ) )
|
---|
| 1014 | {
|
---|
| 1015 | QRegion clipRegion( clipRect.toRect(), QRegion::Ellipse );
|
---|
| 1016 | painter->setClipRegion( clipRegion, Qt::IntersectClip );
|
---|
| 1017 | }
|
---|
| 1018 | }
|
---|
| 1019 |
|
---|
| 1020 | painter->setRenderHint( QPainter::Antialiasing,
|
---|
| 1021 | item->testRenderHint( QwtPolarItem::RenderAntialiased ) );
|
---|
| 1022 |
|
---|
| 1023 | item->draw( painter, azimuthMap, radialMap,
|
---|
| 1024 | pole, radius, canvasRect );
|
---|
| 1025 |
|
---|
| 1026 | painter->restore();
|
---|
| 1027 | }
|
---|
| 1028 | }
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 | /*!
|
---|
| 1032 | Rebuild the scale
|
---|
| 1033 | \param scaleId Scale index
|
---|
| 1034 | */
|
---|
| 1035 |
|
---|
| 1036 | void QwtPolarPlot::updateScale( int scaleId )
|
---|
| 1037 | {
|
---|
| 1038 | if ( scaleId < 0 || scaleId >= QwtPolar::ScaleCount )
|
---|
| 1039 | return;
|
---|
| 1040 |
|
---|
| 1041 | ScaleData &d = d_data->scaleData[scaleId];
|
---|
| 1042 |
|
---|
| 1043 | double minValue = d.minValue;
|
---|
| 1044 | double maxValue = d.maxValue;
|
---|
| 1045 | double stepSize = d.stepSize;
|
---|
| 1046 |
|
---|
| 1047 | if ( scaleId == QwtPolar::ScaleRadius && d.doAutoScale )
|
---|
| 1048 | {
|
---|
| 1049 | QwtInterval interval;
|
---|
| 1050 |
|
---|
| 1051 | const QwtPolarItemList& itmList = itemList();
|
---|
| 1052 | for ( QwtPolarItemIterator it = itmList.begin();
|
---|
| 1053 | it != itmList.end(); ++it )
|
---|
| 1054 | {
|
---|
| 1055 | const QwtPolarItem *item = *it;
|
---|
| 1056 | if ( item->testItemAttribute( QwtPolarItem::AutoScale ) )
|
---|
| 1057 | interval |= item->boundingInterval( scaleId );
|
---|
| 1058 | }
|
---|
| 1059 |
|
---|
| 1060 | minValue = interval.minValue();
|
---|
| 1061 | maxValue = interval.maxValue();
|
---|
| 1062 |
|
---|
| 1063 | d.scaleEngine->autoScale( d.maxMajor,
|
---|
| 1064 | minValue, maxValue, stepSize );
|
---|
[8127] | 1065 | d.isValid = false;
|
---|
[4272] | 1066 | }
|
---|
| 1067 |
|
---|
[8127] | 1068 | if ( !d.isValid )
|
---|
[4272] | 1069 | {
|
---|
| 1070 | d.scaleDiv = d.scaleEngine->divideScale(
|
---|
| 1071 | minValue, maxValue, d.maxMajor, d.maxMinor, stepSize );
|
---|
[8127] | 1072 | d.isValid = true;
|
---|
[4272] | 1073 | }
|
---|
| 1074 |
|
---|
| 1075 | const QwtInterval interval = visibleInterval();
|
---|
| 1076 |
|
---|
| 1077 | const QwtPolarItemList& itmList = itemList();
|
---|
| 1078 | for ( QwtPolarItemIterator it = itmList.begin();
|
---|
| 1079 | it != itmList.end(); ++it )
|
---|
| 1080 | {
|
---|
| 1081 | QwtPolarItem *item = *it;
|
---|
| 1082 | item->updateScaleDiv( *scaleDiv( QwtPolar::Azimuth ),
|
---|
| 1083 | *scaleDiv( QwtPolar::Radius ), interval );
|
---|
| 1084 | }
|
---|
| 1085 | }
|
---|
| 1086 |
|
---|
| 1087 | /*!
|
---|
| 1088 | \return Maximum of all item margin hints.
|
---|
| 1089 | \sa QwtPolarItem::marginHint()
|
---|
| 1090 | */
|
---|
| 1091 | int QwtPolarPlot::plotMarginHint() const
|
---|
| 1092 | {
|
---|
| 1093 | int margin = 0;
|
---|
| 1094 | const QwtPolarItemList& itmList = itemList();
|
---|
| 1095 | for ( QwtPolarItemIterator it = itmList.begin();
|
---|
| 1096 | it != itmList.end(); ++it )
|
---|
| 1097 | {
|
---|
| 1098 | QwtPolarItem *item = *it;
|
---|
| 1099 | if ( item && item->isVisible() )
|
---|
| 1100 | {
|
---|
| 1101 | const int hint = item->marginHint();
|
---|
| 1102 | if ( hint > margin )
|
---|
| 1103 | margin = hint;
|
---|
| 1104 | }
|
---|
| 1105 | }
|
---|
| 1106 | return margin;
|
---|
| 1107 | }
|
---|
| 1108 |
|
---|
| 1109 | /*!
|
---|
| 1110 | The plot area depends on the size of the canvas
|
---|
| 1111 | and the zoom parameters.
|
---|
| 1112 |
|
---|
| 1113 | \return Bounding rect of the plot area
|
---|
| 1114 |
|
---|
| 1115 | */
|
---|
| 1116 | QRectF QwtPolarPlot::plotRect() const
|
---|
| 1117 | {
|
---|
| 1118 | return plotRect( canvas()->contentsRect() );
|
---|
| 1119 | }
|
---|
| 1120 |
|
---|
| 1121 | /*!
|
---|
| 1122 | \brief Calculate the bounding rect of the plot area
|
---|
| 1123 |
|
---|
| 1124 | The plot area depends on the zoom parameters.
|
---|
| 1125 |
|
---|
| 1126 | \param canvasRect Rectangle of the canvas
|
---|
| 1127 | \return Rectangle for displaying 100% of the plot
|
---|
| 1128 | */
|
---|
| 1129 | QRectF QwtPolarPlot::plotRect( const QRectF &canvasRect ) const
|
---|
| 1130 | {
|
---|
| 1131 | const QwtScaleDiv *sd = scaleDiv( QwtPolar::Radius );
|
---|
| 1132 | const QwtScaleEngine *se = scaleEngine( QwtPolar::Radius );
|
---|
| 1133 |
|
---|
| 1134 | const int margin = plotMarginHint();
|
---|
| 1135 | const QRectF cr = canvasRect;
|
---|
| 1136 | const int radius = qMin( cr.width(), cr.height() ) / 2 - margin;
|
---|
| 1137 |
|
---|
| 1138 | QwtScaleMap map;
|
---|
| 1139 | map.setTransformation( se->transformation() );
|
---|
| 1140 | map.setPaintInterval( 0.0, radius / d_data->zoomFactor );
|
---|
| 1141 | map.setScaleInterval( sd->lowerBound(), sd->upperBound() );
|
---|
| 1142 |
|
---|
| 1143 | double v = map.s1();
|
---|
| 1144 | if ( map.s1() <= map.s2() )
|
---|
| 1145 | v += d_data->zoomPos.radius();
|
---|
| 1146 | else
|
---|
| 1147 | v -= d_data->zoomPos.radius();
|
---|
| 1148 | v = map.transform( v );
|
---|
| 1149 |
|
---|
| 1150 | const QPointF off =
|
---|
| 1151 | QwtPointPolar( d_data->zoomPos.azimuth(), v ).toPoint();
|
---|
| 1152 |
|
---|
| 1153 | QPointF center( cr.center().x(), cr.top() + margin + radius );
|
---|
| 1154 | center -= QPointF( off.x(), -off.y() );
|
---|
| 1155 |
|
---|
| 1156 | QRectF rect( 0, 0, 2 * map.p2(), 2 * map.p2() );
|
---|
| 1157 | rect.moveCenter( center );
|
---|
| 1158 |
|
---|
| 1159 | return rect;
|
---|
| 1160 | }
|
---|
| 1161 |
|
---|
| 1162 | /*!
|
---|
| 1163 | \return Bounding interval of the radial scale that is
|
---|
| 1164 | visible on the canvas.
|
---|
| 1165 | */
|
---|
| 1166 | QwtInterval QwtPolarPlot::visibleInterval() const
|
---|
| 1167 | {
|
---|
| 1168 | const QwtScaleDiv *sd = scaleDiv( QwtPolar::Radius );
|
---|
| 1169 |
|
---|
| 1170 | const QRectF cRect = canvas()->contentsRect();
|
---|
| 1171 | const QRectF pRect = plotRect( cRect );
|
---|
| 1172 | if ( cRect.contains( pRect ) || !cRect.intersects( pRect ) )
|
---|
| 1173 | {
|
---|
| 1174 | return QwtInterval( sd->lowerBound(), sd->upperBound() );
|
---|
| 1175 | }
|
---|
| 1176 |
|
---|
| 1177 | const QPointF pole = pRect.center();
|
---|
| 1178 | const QRectF scaleRect = pRect & cRect;
|
---|
| 1179 |
|
---|
| 1180 | const QwtScaleMap map = scaleMap( QwtPolar::Radius );
|
---|
| 1181 |
|
---|
| 1182 | double dmin = 0.0;
|
---|
| 1183 | double dmax = 0.0;
|
---|
| 1184 | if ( scaleRect.contains( pole ) )
|
---|
| 1185 | {
|
---|
| 1186 | dmin = 0.0;
|
---|
| 1187 |
|
---|
| 1188 | QPointF corners[4];
|
---|
| 1189 | corners[0] = scaleRect.bottomRight();
|
---|
| 1190 | corners[1] = scaleRect.topRight();
|
---|
| 1191 | corners[2] = scaleRect.topLeft();
|
---|
| 1192 | corners[3] = scaleRect.bottomLeft();
|
---|
| 1193 |
|
---|
| 1194 | dmax = 0.0;
|
---|
| 1195 | for ( int i = 0; i < 4; i++ )
|
---|
| 1196 | {
|
---|
| 1197 | const double dist = qwtDistance( pole, corners[i] );
|
---|
| 1198 | if ( dist > dmax )
|
---|
| 1199 | dmax = dist;
|
---|
| 1200 | }
|
---|
| 1201 | }
|
---|
| 1202 | else
|
---|
| 1203 | {
|
---|
| 1204 | if ( pole.x() < scaleRect.left() )
|
---|
| 1205 | {
|
---|
| 1206 | if ( pole.y() < scaleRect.top() )
|
---|
| 1207 | {
|
---|
| 1208 | dmin = qwtDistance( pole, scaleRect.topLeft() );
|
---|
| 1209 | dmax = qwtDistance( pole, scaleRect.bottomRight() );
|
---|
| 1210 | }
|
---|
| 1211 | else if ( pole.y() > scaleRect.bottom() )
|
---|
| 1212 | {
|
---|
| 1213 | dmin = qwtDistance( pole, scaleRect.bottomLeft() );
|
---|
| 1214 | dmax = qwtDistance( pole, scaleRect.topRight() );
|
---|
| 1215 | }
|
---|
| 1216 | else
|
---|
| 1217 | {
|
---|
| 1218 | dmin = scaleRect.left() - pole.x();
|
---|
| 1219 | dmax = qMax( qwtDistance( pole, scaleRect.bottomRight() ),
|
---|
| 1220 | qwtDistance( pole, scaleRect.topRight() ) );
|
---|
| 1221 | }
|
---|
| 1222 | }
|
---|
| 1223 | else if ( pole.x() > scaleRect.right() )
|
---|
| 1224 | {
|
---|
| 1225 | if ( pole.y() < scaleRect.top() )
|
---|
| 1226 | {
|
---|
| 1227 | dmin = qwtDistance( pole, scaleRect.topRight() );
|
---|
| 1228 | dmax = qwtDistance( pole, scaleRect.bottomLeft() );
|
---|
| 1229 | }
|
---|
| 1230 | else if ( pole.y() > scaleRect.bottom() )
|
---|
| 1231 | {
|
---|
| 1232 | dmin = qwtDistance( pole, scaleRect.bottomRight() );
|
---|
| 1233 | dmax = qwtDistance( pole, scaleRect.topLeft() );
|
---|
| 1234 | }
|
---|
| 1235 | else
|
---|
| 1236 | {
|
---|
| 1237 | dmin = pole.x() - scaleRect.right();
|
---|
| 1238 | dmax = qMax( qwtDistance( pole, scaleRect.bottomLeft() ),
|
---|
| 1239 | qwtDistance( pole, scaleRect.topLeft() ) );
|
---|
| 1240 | }
|
---|
| 1241 | }
|
---|
| 1242 | else if ( pole.y() < scaleRect.top() )
|
---|
| 1243 | {
|
---|
| 1244 | dmin = scaleRect.top() - pole.y();
|
---|
| 1245 | dmax = qMax( qwtDistance( pole, scaleRect.bottomLeft() ),
|
---|
| 1246 | qwtDistance( pole, scaleRect.bottomRight() ) );
|
---|
| 1247 | }
|
---|
| 1248 | else if ( pole.y() > scaleRect.bottom() )
|
---|
| 1249 | {
|
---|
| 1250 | dmin = pole.y() - scaleRect.bottom();
|
---|
| 1251 | dmax = qMax( qwtDistance( pole, scaleRect.topLeft() ),
|
---|
| 1252 | qwtDistance( pole, scaleRect.topRight() ) );
|
---|
| 1253 | }
|
---|
| 1254 | }
|
---|
| 1255 |
|
---|
| 1256 | const double radius = pRect.width() / 2.0;
|
---|
| 1257 | if ( dmax > radius )
|
---|
| 1258 | dmax = radius;
|
---|
| 1259 |
|
---|
| 1260 | QwtInterval interval;
|
---|
| 1261 | interval.setMinValue( map.invTransform( dmin ) );
|
---|
| 1262 | interval.setMaxValue( map.invTransform( dmax ) );
|
---|
| 1263 |
|
---|
| 1264 | return interval;
|
---|
| 1265 | }
|
---|
| 1266 |
|
---|
| 1267 | /*!
|
---|
| 1268 | \return Layout, responsible for the geometry of the plot components
|
---|
| 1269 | */
|
---|
| 1270 | QwtPolarLayout *QwtPolarPlot::plotLayout()
|
---|
| 1271 | {
|
---|
| 1272 | return d_data->layout;
|
---|
| 1273 | }
|
---|
| 1274 |
|
---|
| 1275 | /*!
|
---|
| 1276 | \return Layout, responsible for the geometry of the plot components
|
---|
| 1277 | */
|
---|
| 1278 | const QwtPolarLayout *QwtPolarPlot::plotLayout() const
|
---|
| 1279 | {
|
---|
| 1280 | return d_data->layout;
|
---|
| 1281 | }
|
---|
[8127] | 1282 |
|
---|
| 1283 | /*!
|
---|
| 1284 | \brief Attach/Detach a plot item
|
---|
| 1285 |
|
---|
| 1286 | \param plotItem Plot item
|
---|
| 1287 | \param on When true attach the item, otherwise detach it
|
---|
| 1288 | */
|
---|
| 1289 | void QwtPolarPlot::attachItem( QwtPolarItem *plotItem, bool on )
|
---|
| 1290 | {
|
---|
| 1291 | if ( on )
|
---|
| 1292 | insertItem( plotItem );
|
---|
| 1293 | else
|
---|
| 1294 | removeItem( plotItem );
|
---|
| 1295 |
|
---|
| 1296 | Q_EMIT itemAttached( plotItem, on );
|
---|
| 1297 |
|
---|
| 1298 | if ( plotItem->testItemAttribute( QwtPolarItem::Legend ) )
|
---|
| 1299 | {
|
---|
| 1300 | // the item wants to be represented on the legend
|
---|
| 1301 |
|
---|
| 1302 | if ( on )
|
---|
| 1303 | {
|
---|
| 1304 | updateLegend( plotItem );
|
---|
| 1305 | }
|
---|
| 1306 | else
|
---|
| 1307 | {
|
---|
| 1308 | const QVariant itemInfo = itemToInfo( plotItem );
|
---|
| 1309 | Q_EMIT legendDataChanged( itemInfo, QList<QwtLegendData>() );
|
---|
| 1310 | }
|
---|
| 1311 | }
|
---|
| 1312 |
|
---|
| 1313 | if ( autoReplot() )
|
---|
| 1314 | update();
|
---|
| 1315 | }
|
---|
| 1316 |
|
---|
| 1317 | /*!
|
---|
| 1318 | \brief Build an information, that can be used to identify
|
---|
| 1319 | a plot item on the legend.
|
---|
| 1320 |
|
---|
| 1321 | The default implementation simply wraps the plot item
|
---|
| 1322 | into a QVariant object. When overloading itemToInfo()
|
---|
| 1323 | usually infoToItem() needs to reimplemeted too.
|
---|
| 1324 |
|
---|
| 1325 | \code
|
---|
| 1326 | QVariant itemInfo;
|
---|
| 1327 | qVariantSetValue( itemInfo, plotItem );
|
---|
| 1328 | \endcode
|
---|
| 1329 |
|
---|
| 1330 | \param plotItem Plot item
|
---|
| 1331 | \sa infoToItem()
|
---|
| 1332 | */
|
---|
| 1333 | QVariant QwtPolarPlot::itemToInfo( QwtPolarItem *plotItem ) const
|
---|
| 1334 | {
|
---|
| 1335 | QVariant itemInfo;
|
---|
| 1336 | qVariantSetValue( itemInfo, plotItem );
|
---|
| 1337 |
|
---|
| 1338 | return itemInfo;
|
---|
| 1339 | }
|
---|
| 1340 |
|
---|
| 1341 | /*!
|
---|
| 1342 | \brief Identify the plot item according to an item info object,
|
---|
| 1343 | that has bee generated from itemToInfo().
|
---|
| 1344 |
|
---|
| 1345 | The default implementation simply tries to unwrap a QwtPlotItem
|
---|
| 1346 | pointer:
|
---|
| 1347 |
|
---|
| 1348 | \code
|
---|
| 1349 | if ( itemInfo.canConvert<QwtPlotItem *>() )
|
---|
| 1350 | return qvariant_cast<QwtPlotItem *>( itemInfo );
|
---|
| 1351 | \endcode
|
---|
| 1352 | \param itemInfo Plot item
|
---|
| 1353 | \return A plot item, when successful, otherwise a NULL pointer.
|
---|
| 1354 | \sa itemToInfo()
|
---|
| 1355 | */
|
---|
| 1356 | QwtPolarItem *QwtPolarPlot::infoToItem( const QVariant &itemInfo ) const
|
---|
| 1357 | {
|
---|
| 1358 | if ( itemInfo.canConvert<QwtPolarItem *>() )
|
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| 1359 | return qvariant_cast<QwtPolarItem *>( itemInfo );
|
---|
| 1360 |
|
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| 1361 | return NULL;
|
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| 1362 | }
|
---|