1 |
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2 | /* -------------------------------------------------------------------------
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3 | * BKG NTRIP Client
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4 | * -------------------------------------------------------------------------
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5 | *
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6 | * Class: t_polarPlot
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7 | *
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8 | * Purpose: Polar Plot
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9 | *
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10 | * Author: L. Mervart
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11 | *
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12 | * Created: 23-Jun-2012
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13 | *
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14 | * Changes:
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15 | *
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16 | * -----------------------------------------------------------------------*/
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17 |
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18 | #include <qpen.h>
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19 | #include <qwt_series_data.h>
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20 | #include <qwt_symbol.h>
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21 | #include <qwt_legend.h>
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22 | #include <qwt_polar_grid.h>
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23 | #include <qwt_polar_curve.h>
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24 | #include <qwt_polar_marker.h>
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25 | #include <qwt_scale_engine.h>
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26 |
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27 | #include "polarplot.h"
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28 |
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29 | const QwtInterval radialInterval( 0.0, 10.0 );
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30 | const QwtInterval azimuthInterval( 0.0, 360.0 );
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31 |
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32 | //
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33 | ////////////////////////////////////////////////////////////////////////////
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34 | class Data: public QwtSeriesData<QwtPointPolar> {
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35 | public:
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36 | Data( const QwtInterval &radialInterval,
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37 | const QwtInterval &azimuthInterval, size_t size ):
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38 | _radialInterval( radialInterval ),
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39 | _azimuthInterval( azimuthInterval ),
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40 | _size( size ) {}
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41 |
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42 | virtual size_t size() const {return _size;}
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43 |
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44 | protected:
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45 | QwtInterval _radialInterval;
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46 | QwtInterval _azimuthInterval;
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47 | size_t _size;
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48 | };
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49 |
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50 | //
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51 | ////////////////////////////////////////////////////////////////////////////
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52 | class SpiralData: public Data {
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53 | public:
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54 | SpiralData( const QwtInterval &radialInterval,
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55 | const QwtInterval &azimuthInterval, size_t size ):
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56 | Data( radialInterval, azimuthInterval, size ) {}
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57 |
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58 | virtual QwtPointPolar sample(size_t i) const {
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59 | const double stepA = 4 * _azimuthInterval.width() / _size;
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60 | const double a = _azimuthInterval.minValue() + i * stepA;
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61 |
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62 | const double stepR = _radialInterval.width() / _size;
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63 | const double r = _radialInterval.minValue() + i * stepR;
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64 |
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65 | return QwtPointPolar( a, r );
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66 | }
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67 |
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68 | virtual QRectF boundingRect() const {
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69 | if ( d_boundingRect.width() < 0.0 ) {
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70 | d_boundingRect = qwtBoundingRect( *this );
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71 | }
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72 | return d_boundingRect;
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73 | }
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74 | };
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75 |
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76 | // Constructor
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77 | ////////////////////////////////////////////////////////////////////////////
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78 | t_polarPlot::t_polarPlot( QWidget *parent ) :
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79 | QwtPolarPlot(QwtText("Polar Plot"), parent ) {
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80 |
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81 | setAutoReplot(false);
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82 | setPlotBackground(Qt::darkBlue);
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83 |
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84 | // Scales
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85 | // ------
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86 | setScale(QwtPolar::Azimuth,
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87 | azimuthInterval.minValue(), azimuthInterval.maxValue(),
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88 | azimuthInterval.width() / 12);
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89 |
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90 | setScaleMaxMinor( QwtPolar::Azimuth, 2 );
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91 | setScale( QwtPolar::Radius,
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92 | radialInterval.minValue(), radialInterval.maxValue() );
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93 |
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94 | // Grids, Axes
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95 | // -----------
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96 | _grid = new QwtPolarGrid();
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97 | _grid->setPen( QPen( Qt::white ) );
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98 | for ( int scaleId = 0; scaleId < QwtPolar::ScaleCount; scaleId++ ) {
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99 | _grid->showGrid( scaleId );
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100 | _grid->showMinorGrid( scaleId );
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101 |
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102 | QPen minorPen( Qt::gray );
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103 | _grid->setMinorGridPen( scaleId, minorPen );
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104 | }
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105 |
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106 | _grid->setAxisPen( QwtPolar::AxisAzimuth, QPen( Qt::black ) );
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107 |
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108 | _grid->showAxis( QwtPolar::AxisAzimuth, true );
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109 | _grid->showAxis( QwtPolar::AxisLeft, false );
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110 | _grid->showAxis( QwtPolar::AxisRight, true );
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111 | _grid->showAxis( QwtPolar::AxisTop, true );
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112 | _grid->showAxis( QwtPolar::AxisBottom, false );
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113 | _grid->showGrid( QwtPolar::Azimuth, true );
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114 | _grid->showGrid( QwtPolar::Radius, true );
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115 | _grid->attach( this );
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116 |
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117 | // Curves
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118 | // ------
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119 | QwtPolarCurve* curve = createCurve();
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120 | curve->attach(this);
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121 | _curves << curve;
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122 |
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123 | // Legend
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124 | // ------
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125 | QwtLegend *legend = new QwtLegend;
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126 | insertLegend( legend, QwtPolarPlot::BottomLegend );
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127 | }
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128 |
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129 | //
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130 | ////////////////////////////////////////////////////////////////////////////
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131 | QwtPolarCurve* t_polarPlot::createCurve() const {
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132 | const int numPoints = 200;
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133 |
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134 | QwtPolarCurve* curve = new QwtPolarCurve();
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135 | curve->setStyle( QwtPolarCurve::Lines );
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136 | curve->setTitle( "Spiral" );
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137 | curve->setPen( QPen( Qt::yellow, 2 ) );
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138 | curve->setSymbol(new QwtSymbol(QwtSymbol::Rect,
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139 | QBrush(Qt::cyan), QPen(Qt::white), QSize(3, 3)));
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140 | curve->setData(
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141 | new SpiralData( radialInterval, azimuthInterval, numPoints ) );
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142 | return curve;
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143 | }
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