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data_plot.cpp
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executable file
·139 lines (115 loc) · 3.78 KB
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#include <stdlib.h>
#include <qwt_painter.h>
#include <qwt_plot_canvas.h>
#include <qwt_plot_marker.h>
#include <qwt_plot_curve.h>
#include <qwt_scale_widget.h>
#include <qwt_legend.h>
#include <qwt_scale_draw.h>
#include <qwt_math.h>
#include "data_plot.h"
#include <qwt_symbol.h>
//#include <qwt_plot_grid.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_magnifier.h>
//
// Initialize main window
//
DataPlot::DataPlot(QWidget *parent):
QwtPlot(parent)
{
setCanvasBackground(QColor(Qt::white));
// QwtPlotGrid *grid = new QwtPlotGrid;
// grid->enableXMin(true);
// grid->setMajPen(QPen(Qt::white, 0, Qt::DotLine));
// grid->setMinPen(QPen(Qt::gray, 0 , Qt::DotLine));
// grid->attach(this);
// Disable polygon clipping
QwtPainter::setDeviceClipping(false);
// We don't need the cache here
canvas()->setPaintAttribute(QwtPlotCanvas::PaintCached, false);
canvas()->setPaintAttribute(QwtPlotCanvas::PaintPacked, false);
#if QT_VERSION >= 0x040000
#ifdef Q_WS_X11
/*
Qt::WA_PaintOnScreen is only supported for X11, but leads
to substantial bugs with Qt 4.2.x/Windows
*/
canvas()->setAttribute(Qt::WA_PaintOnScreen, true);
#endif
#endif
alignScales();
insertLegend(new QwtLegend(), QwtPlot::BottomLegend);
QwtSymbol sym;
sym.setStyle(QwtSymbol::Ellipse);
sym.setPen(QColor(Qt::black));
sym.setSize(5);
// Insert new curves
QwtPlotCurve *cRight = new QwtPlotCurve("data");
cRight->setStyle(QwtPlotCurve::Lines);
cRight->setSymbol(sym);
cRight->attach(this);
// Set curve styles
cRight->setPen(QPen(Qt::blue));
cRight->setRawData(d_x, d_y, PLOT_SIZE);
#if 0
// Insert zero line at y = 0
QwtPlotMarker *mY = new QwtPlotMarker();
mY->setLabelAlignment(Qt::AlignRight|Qt::AlignTop);
mY->setLineStyle(QwtPlotMarker::HLine);
mY->setYValue(0.0);
mY->attach(this);
#endif
// Axis
setAxisTitle(QwtPlot::xBottom, "Time/microseconds(200ms/point)");
//setAxisScale(QwtPlot::xBottom, 0, PLOT_SIZE-1,1);
setAxisTitle(QwtPlot::yLeft, "Values");
setAxisScale(QwtPlot::yLeft, 0, 10);
QwtPlotMagnifier *zoomer = new QwtPlotMagnifier(canvas());
zoomer->setAxisEnabled(QwtPlot::xBottom,true);
zoomer->setAxisEnabled(QwtPlot::yLeft,false);
QwtPlotPanner *panner =new QwtPlotPanner(canvas());
panner->setMouseButton(Qt::LeftButton);
panner->setAxisEnabled(QwtPlot::xBottom,true);
panner->setAxisEnabled(QwtPlot::yLeft,false);
// Zoomer *zoomer = new Zoomer(canvas());
// zoomer->setRubberBandPen(QPen(Qt::red, 2, Qt::DotLine));
// zoomer->setTrackerPen(QPen(Qt::red));;
// setTimerInterval(200);
}
void DataPlot::setData(double x[PLOT_SIZE],double y[PLOT_SIZE])
{
memcpy(d_x,x,PLOT_SIZE*sizeof(double));
memcpy(d_y,y,PLOT_SIZE*sizeof(double));
double max = d_y[0],min=d_y[0];
for(int i= 0; i<PLOT_SIZE; i++)
{
if(min>d_y[i])
min = d_y[i] ;
if(max<d_y[i])
max = d_y[i] ;
}
setAxisScale(QwtPlot::yLeft, min-1, max+1);
replot();
}
//
// Set a plain canvas frame and align the scales to it
//
void DataPlot::alignScales()
{
// The code below shows how to align the scales to
// the canvas frame, but is also a good example demonstrating
// why the spreaded API needs polishing.
canvas()->setFrameStyle(QFrame::Box | QFrame::Plain );
canvas()->setLineWidth(1);
//int a = QwtPlot::axisCnt;
for ( int i = 0; i < QwtPlot::axisCnt; i++ )
{
QwtScaleWidget *scaleWidget = (QwtScaleWidget *)axisWidget(i);
if ( scaleWidget )
scaleWidget->setMargin(0);
QwtScaleDraw *scaleDraw = (QwtScaleDraw *)axisScaleDraw(i);
if ( scaleDraw )
scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
}
}