1 | // %flair:license{
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2 | // This file is part of the Flair framework distributed under the
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3 | // CECILL-C License, Version 1.0.
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4 | // %flair:license}
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5 | #include "Scope.h"
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6 | #include "Scrollbar.h"
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7 | #include <qwt_plot_curve.h>
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8 | #include <qwt_plot_grid.h>
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9 | #include <qwt_plot_magnifier.h>
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10 | #include <qwt_plot_canvas.h>
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11 | #include <qwt_scale_widget.h>
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12 | #include <qwt_legend_label.h>
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13 | #include <qwt_legend.h>
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14 | #include <qwt_plot_panner.h>
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15 | #include <QMouseEvent>
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16 | #include <QMenu>
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17 | #include <QTimer>
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18 | #include <QTime>
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19 | #include <QApplication>
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20 |
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21 | #define WHEEL_DIVIDOR 30
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22 |
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23 | Scope::Scope(QString title,float ymin,float ymax,float view_size_s,unsigned int refresh_rate_ms,unsigned int history_size): QwtPlot() {
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24 | this->ymin=ymin;
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25 | this->ymax=ymax;
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26 | this->history_size=history_size;
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27 | this->view_size_s=view_size_s;
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28 | orig_view_size_s=view_size_s;
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29 |
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30 | //scroll bar
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31 | scrollbar=new ScrollBar(Qt::Horizontal,canvas());
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32 | connect(scrollbar,SIGNAL(valueChanged(Qt::Orientation,float,float)),this,SLOT(scrollBarMoved(Qt::Orientation,float,float)));
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33 | scrolling=true;
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34 |
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35 | //minimum size; sinon widget trop grand
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36 | setMinimumHeight(10);
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37 | setMinimumWidth(1);
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38 |
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39 | alignScales();//is it necessary?
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40 |
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41 | // Initialize data
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42 | elapsed_time_s=0;
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43 |
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44 | // Assign a title
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45 | setTitle(title);
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46 |
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47 | // Axis
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48 | setAxisTitle(QwtPlot::xBottom, "Time (s)");
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49 | setAxisScale(QwtPlot::xBottom,0, view_size_s);
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50 |
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51 | setAxisTitle(QwtPlot::yLeft, "Values");
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52 | setAxisScale(QwtPlot::yLeft, ymin, ymax);
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53 |
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54 | // grid
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55 | QwtPlotGrid *grid = new QwtPlotGrid;
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56 | grid->setPen(QPen(Qt::black, 0, Qt::DotLine));
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57 | grid->attach(this);
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58 |
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59 | //zoomer
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60 | QwtPlotMagnifier * zoomer = new QwtPlotMagnifier(canvas());
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61 | zoomer->setWheelModifiers( Qt::ControlModifier );
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62 | zoomer->setMouseButton(Qt::NoButton);
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63 | zoomer->setAxisEnabled(xBottom,0);
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64 |
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65 | //scroller
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66 | QwtPlotPanner *scroller =new QwtPlotPanner(canvas());
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67 | scroller->setAxisEnabled(xBottom,0);
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68 |
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69 | //legend
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70 | QwtLegend* new_legend=new QwtLegend();
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71 | new_legend->setDefaultItemMode(QwtLegendData::Checkable);
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72 | insertLegend(new_legend, QwtPlot::BottomLegend);
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73 |
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74 | connect( new_legend, SIGNAL( checked( const QVariant &, bool, int ) ), SLOT( legendChecked( const QVariant &, bool ) ) );
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75 |
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76 | QTimer *timer = new QTimer(this);
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77 | connect(timer, SIGNAL(timeout()), this, SLOT(replot()));
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78 | timer->start(refresh_rate_ms);
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79 | }
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80 |
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81 | Scope::~Scope() {
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82 | for(int i=0;i<curves.count();i++) {
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83 | free(curves.at(i)->data_x);
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84 | free(curves.at(i)->data_y);
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85 | delete curves.at(i)->plot;
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86 | free(curves.at(i));
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87 | }
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88 | }
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89 |
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90 | void Scope::resetXView(void) {
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91 | //setAxisScale(QwtPlot::xBottom,0, orig_view_size_s);
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92 | changeViewSize(orig_view_size_s);
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93 | }
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94 |
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95 | void Scope::resetYView(void) {
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96 | setAxisScale(QwtPlot::yLeft, ymin, ymax);
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97 | }
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98 |
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99 | bool Scope::eventFilter(QObject *o, QEvent *e) {
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100 | switch(e->type()) {
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101 | case QEvent::Resize: {
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102 | const int fw = ((QwtPlotCanvas *)canvas())->frameWidth();
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103 |
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104 | QRect rect;
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105 | rect.setSize(((QResizeEvent *)e)->size());
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106 | rect.setRect(rect.x() + fw, rect.y() + fw,
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107 | rect.width() - 2 * fw, rect.height() - 2 * fw);
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108 |
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109 | scrollbar->setGeometry(0, 0, rect.width(), 10);
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110 | return true;
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111 | }
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112 | case QEvent::Wheel: {
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113 | //ctrl+wheel is already handled for y zoom
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114 | if(!(QApplication::keyboardModifiers() & Qt::ControlModifier)) {
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115 | QWheelEvent *wheelevent = static_cast<QWheelEvent *> (e);
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116 | if(view_size_s+wheelevent->delta()/WHEEL_DIVIDOR>0) changeViewSize(view_size_s+wheelevent->delta()/WHEEL_DIVIDOR);
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117 | }
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118 | return true;
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119 | }
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120 | default:
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121 | break;
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122 | }
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123 | return QwtPlot::eventFilter(o, e);
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124 | }
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125 |
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126 | void Scope::changeViewSize(float new_view_size_s) {
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127 | view_size_s=new_view_size_s;
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128 |
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129 | if(scrolling==false) {
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130 | //4 cas: on utilise le temps au milieu de la vue actuelle
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131 |
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132 | //le temps total est plus petit que le view_size_s, on affiche tout:
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133 | if(elapsed_time_s<view_size_s) {
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134 | scrolling=true;
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135 | } else {
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136 | double min=(min_scroll+max_scroll)/2-view_size_s/2;
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137 | double max=(min_scroll+max_scroll)/2+view_size_s/2;
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138 | //on va du debut jusqu'a view size
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139 | if( min<0) {
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140 | min=0;
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141 | max=view_size_s;
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142 | }
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143 | //on va de fin-viewsize jusqu'a la fin
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144 | if(max>elapsed_time_s) {
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145 | min=elapsed_time_s-view_size_s;
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146 | max=elapsed_time_s;
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147 | }
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148 | scrollbar->moveSlider(min,max);//move slider coupe le signal, on fait aussi le scrollbar
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149 | scrollBarMoved(Qt::Horizontal,min,max);
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150 | }
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151 | }
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152 | }
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153 |
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154 | void Scope::legendChecked( const QVariant &itemInfo, bool on ) {
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155 | QwtPlotItem *plotItem=infoToItem(itemInfo);
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156 | if(plotItem) showCurve( plotItem, on );
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157 | }
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158 |
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159 | void Scope::showCurve(QwtPlotItem *item, bool on) {
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160 | item->setVisible(on);
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161 |
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162 | QwtLegend *lgd=qobject_cast<QwtLegend*>(legend());
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163 |
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164 | QList<QWidget*> legendWidgets=lgd->legendWidgets(itemToInfo(item));
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165 |
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166 | if(legendWidgets.size()==1) {
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167 | QwtLegendLabel *legendLabel=qobject_cast<QwtLegendLabel*>(legendWidgets[0]);
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168 |
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169 | if(legendLabel) legendLabel->setChecked( on );
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170 | }
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171 | }
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172 |
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173 | int Scope::addCurve(QPen pen,QString legend) {
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174 | Curve* curve=(Curve*)malloc(sizeof(Curve));
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175 | curve->data_x=(double*)calloc(history_size,sizeof(double));
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176 | curve->data_y=(double*)calloc(history_size,sizeof(double));
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177 | curve->index=0;
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178 | curve->min_index=0;
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179 | curve->max_index=0;
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180 |
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181 | // Insert new curve
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182 | curve->plot=new QwtPlotCurve(legend);
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183 | curve->plot->attach(this);
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184 | curve->plot->setPen(pen);
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185 | curves.append(curve);
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186 |
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187 | showCurve(curve->plot, true);
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188 |
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189 | return curves.count()-1;
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190 | }
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191 |
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192 | void Scope::updateCurve(Curve* curve) {
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193 | if(scrolling==true) {
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194 | curve->plot->setRawSamples(&curve->data_x[curve->min_index], &curve->data_y[curve->min_index], curve->max_index-curve->min_index);
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195 | }
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196 |
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197 | if(curve->index==history_size) {
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198 | //printf("a revoir qd on arrive a la fin, il faudrait faire un realloc pour rien perdre\n");
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199 | //attention le setrawdata s'attend a ce que l'adresse change pas, ce qui n'est pas le cas avec lerealloc
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200 | //il faudra refaire un setrawdata ici
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201 | curve->index=0;
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202 | curve->min_index=0;
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203 | scrolling=true;
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204 | }
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205 |
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206 | //determine les index pour la visualisation
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207 | if(scrolling==true) {
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208 | curve->max_index=curve->index;
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209 | computeMinIndex(curve,elapsed_time_s-view_size_s);
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210 | }
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211 |
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212 | scrollbar->setBase(0,elapsed_time_s);
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213 | if(scrolling==true) {
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214 | scrollbar->moveSlider(elapsed_time_s-view_size_s,elapsed_time_s);
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215 |
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216 | if(elapsed_time_s<view_size_s) {
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217 | setAxisScale(QwtPlot::xBottom,0, view_size_s);
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218 | } else {
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219 | setAxisScale(QwtPlot::xBottom,elapsed_time_s-view_size_s, elapsed_time_s);
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220 | }
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221 | } else {
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222 | scrollbar->moveSlider(min_scroll,max_scroll);
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223 | }
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224 | }
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225 |
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226 | void Scope::alignScales(void) {
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227 | // The code below shows how to align the scales to
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228 | // the canvas frame, but is also a good example demonstrating
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229 | // why the spreaded API needs polishing.
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230 | /*
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231 | plot->canvas()->setFrameStyle(QFrame::Box | QFrame::Plain );
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232 | plot->canvas()->setLineWidth(1);
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233 | */
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234 | for(int i = 0;i<QwtPlot::axisCnt;i++) {
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235 | QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(i);
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236 | if(scaleWidget) scaleWidget->setMargin(0);
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237 |
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238 | QwtScaleDraw *scaleDraw=(QwtScaleDraw *)axisScaleDraw(i);
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239 | if(scaleDraw) scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
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240 | }
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241 | }
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242 |
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243 | void Scope::scrollBarMoved(Qt::Orientation o, float min, float max)
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244 | {
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245 | min_scroll=min;
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246 | max_scroll=max;
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247 |
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248 | if(max==scrollbar->maxBaseValue()) {
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249 | scrolling=true;
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250 | } else {
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251 | scrolling=false;
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252 | setAxisScale(QwtPlot::xBottom,min,max);
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253 |
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254 | //determine les index pour la visualisation
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255 | for(int i=0;i<curves.count();i++) {
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256 | computeMinIndex(curves.at(i),min);
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257 | computeMaxIndex(curves.at(i),max);
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258 | curves.at(i)->plot->setRawSamples(&curves.at(i)->data_x[curves.at(i)->min_index], &curves.at(i)->data_y[curves.at(i)->min_index], curves.at(i)->max_index-curves.at(i)->min_index);
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259 | }
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260 | }
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261 | }
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262 |
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263 | //TODO: faire une dichotomie
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264 | void Scope::computeMinIndex(Curve* curve,float displayed_min_time) {
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265 | if(curve->data_x[curve->index]>displayed_min_time) {
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266 | if(curve->data_x[curve->min_index]<displayed_min_time) {
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267 | while(curve->data_x[curve->min_index]<displayed_min_time && curve->min_index!=curve->index) curve->min_index++;
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268 | } else {
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269 | while(curve->data_x[curve->min_index]>displayed_min_time && curve->min_index!=0) curve->min_index--;
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270 | }
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271 | }
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272 | }
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273 |
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274 | void Scope::computeMaxIndex(Curve* curve,float displayed_max_time) {
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275 | if(curve->data_x[curve->max_index]<displayed_max_time) {
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276 | while(curve->data_x[curve->max_index]<displayed_max_time && curve->max_index!=curve->index) curve->max_index++;
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277 | } else {
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278 | while(curve->data_x[curve->max_index]>displayed_max_time) curve->max_index--;
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279 | }
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280 | }
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