source: flair-src/trunk/tools/FlairGCS/src/RangeFinderPlot.cpp@ 9

#include "RangeFinderPlot.h"
#include "Layout.h"
#include <stdlib.h>
#include <qwt_plot_grid.h>
#include <qwt_plot_magnifier.h>
#include <qwt_scale_widget.h>
#include <qwt_plot_panner.h>
#include <qwt_plot_rescaler.h>
#include <qwt_plot_shapeitem.h>
#include <QMouseEvent>
#include <QMenu>
#include <QInputDialog>
#include <qendian.h>
#include <qmath.h>

RangeFinderPlot::RangeFinderPlot(Layout* parent,int row, int col,QString name,
                                 QString x_name,QString y_name,
                                 float xmin, float xmax,float ymin, float ymax,
                                 float start_angle,float end_angle,uint32_t nb_samples,QString data_type,
                                 bool invert_axis,bool enabled,int period):
    DataRemote(name,"RangeFinderPlot",parent,enabled,period)
{
    invert_axis=true;
    this->start_angle=start_angle;
    this->end_angle=end_angle;
    this->nb_samples=nb_samples;
    this->data_type=data_type;
    this->invert_axis=invert_axis;

    if(data_type=="float")
    {
        receivesize=nb_samples*sizeof(float);
    }
    else if(data_type=="int8_t")
    {
        receivesize=nb_samples*sizeof(int8_t);
    }
    else if(data_type=="int16_t")
    {
        receivesize=nb_samples*sizeof(int16_t);
    }
    else
    {
        printf("RangeFinderPlot::RangeFinderPlot unknown type %s\n",data_type.toLocal8Bit().constData());
    }


    plot=new QwtPlot(NULL);
    plot->setEnabled(enabled);
    //plot->setAutoReplot( false );

    parent->addWidget(plot,row,col);
    visible_widget=plot;

    plot->setTitle(name);

    // grid
    QwtPlotGrid *grid = new QwtPlotGrid;
    grid->setPen(QPen(Qt::black, 0, Qt::DotLine));
    grid->attach(plot);

    plot->updateAxes();

    //zoomer
    QwtPlotMagnifier * zoomer = new QwtPlotMagnifier(plot->canvas());
    zoomer->setMouseButton(Qt::RightButton,Qt::ControlModifier);

    //scroller
    QwtPlotPanner *scroller =new QwtPlotPanner(plot->canvas());

    // Axis
    if(!invert_axis) {
        plot->setAxisTitle(QwtPlot::xBottom, x_name);
        setXAxisScale(xmin,xmax);

        plot->setAxisTitle(QwtPlot::yLeft, y_name);
        setYAxisScale(ymin,ymax);
    } else {
        plot->setAxisTitle(QwtPlot::xBottom, y_name);
        setXAxisScale(ymin,ymax);

        plot->setAxisTitle(QwtPlot::yLeft, x_name);
        setYAxisScale(xmin,xmax);
    }

    QwtPlotRescaler* rescaler = new QwtPlotRescaler( plot->canvas() );
    rescaler->setRescalePolicy( QwtPlotRescaler::Fixed );

    //( void ) new QwtPlotMagnifier( plot->canvas() );

    plot->canvas()->installEventFilter(this);

    for(uint32_t i=0;i<nb_samples;i++)
    {
        addTriangle(start_angle+i*(end_angle-start_angle+1)/nb_samples,start_angle+(i+1)*(end_angle-start_angle+1)/nb_samples);
    }
}

RangeFinderPlot::~RangeFinderPlot()
{
    delete plot;
}

void RangeFinderPlot::XmlEvent(QDomElement dom)
{
    XmlSetup(dom);
}

bool RangeFinderPlot::eventFilter(QObject *o, QEvent *e)
{
    if (o==plot->canvas())
    {
        switch(e->type())
        {
            case QEvent::MouseButtonPress:
            {
                mousePressEvent((QMouseEvent*)e);
                break;
            }

            default:
                break;
        }
    }
    return plot->eventFilter(o, e);
}


//
//  Set a plain canvas frame and align the scales to it
//
void RangeFinderPlot::alignScales(void)
{
    // 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.
/*
    plot->canvas()->setFrameStyle(QFrame::Box | QFrame::Plain );
    plot->canvas()->setLineWidth(1);
*/
    for ( int i = 0; i < QwtPlot::axisCnt; i++ )
    {
        QwtScaleWidget *scaleWidget = (QwtScaleWidget *)plot->axisWidget(i);
        if ( scaleWidget )
            scaleWidget->setMargin(0);

        QwtScaleDraw *scaleDraw = (QwtScaleDraw *)plot->axisScaleDraw(i);
        if ( scaleDraw )
            scaleDraw->enableComponent(QwtAbstractScaleDraw::Backbone, false);
    }
}

void RangeFinderPlot::setXAxisScale(float xmin,float xmax)
{
    xmin_orig=xmin;
    xmax_orig=xmax;
    plot->setAxisScale(QwtPlot::xBottom, xmin_orig, xmax_orig);

}

void RangeFinderPlot::setYAxisScale(float ymin,float ymax)
{
    ymin_orig=ymin;
    ymax_orig=ymax;
    plot->setAxisScale(QwtPlot::yLeft, ymin_orig, ymax_orig);
}

void RangeFinderPlot::BufEvent(char **buf,int *buf_size,uint16_t period,bool big_endian)
{
    plot->setEnabled(IsEnabled());
    if(IsEnabled()==false || RefreshRate_ms()!=period) return;

    for(uint32_t i=0;i<nb_samples;i++)
    {
        if(data_type=="float")
        {
            uint32_t data_raw;
            float* data=(float*)&data_raw;

            memcpy((void*)&data_raw,*buf,sizeof(uint32_t));
            *buf+=sizeof(uint32_t);
            if(big_endian==true) data_raw=qFromBigEndian(data_raw);
            SetTriangle(i,*data);
        }
        else if(data_type=="int8_t")
        {
            int8_t data;
            memcpy((void*)&data,*buf,sizeof(data));
            *buf+=sizeof(data);
            SetTriangle(i,data);
        }
        else if(data_type=="int16_t")
        {
            int16_t data;
            memcpy((void*)&data,*buf,sizeof(data));
            *buf+=sizeof(data);
            if(big_endian==true) data=qFromBigEndian(data);
            SetTriangle(i,data);
        }
        else
        {
            printf("RangeFinderPlot::BufEvent unknown type %s\n",data_type.toLocal8Bit().constData());
        }
     }

    plot->replot();
}

void RangeFinderPlot::addTriangle(float angle_min, float angle_max)
{
    QwtPlotShapeItem *item = new QwtPlotShapeItem();

    item->setRenderHint( QwtPlotItem::RenderAntialiased, true );
    item->attach(plot);
    triangles.append(item);

}

void RangeFinderPlot::SetTriangle(uint32_t id,float length)
{
    QPainterPath path;
    QPolygonF triangle;
    float angle_min=start_angle+id*(end_angle-start_angle+1)/nb_samples;
    float angle_max=start_angle+(id+1)*(end_angle-start_angle+1)/nb_samples;

    if(invert_axis) {
        angle_min=90-angle_min;
        angle_max=90-angle_max;
    }

    triangle += QPointF( 0,0 );
    triangle += QPointF( length*cos(angle_min*M_PI/180.),length*sin(angle_min*M_PI/180.) );
    triangle += QPointF( length*cos(angle_max*M_PI/180.),length*sin(angle_max*M_PI/180.) );

    path.addPolygon( triangle );

    path.closeSubpath();
    triangles.at(id)->setShape(path);

    QColor fillColor = "SandyBrown";
    fillColor.setAlpha( 200 );

    QPen pen( QColor("SandyBrown"), 1 );
    pen.setJoinStyle( Qt::MiterJoin );
    triangles.at(id)->setPen( pen );
    triangles.at(id)->setBrush( fillColor );
}

//context menu
void RangeFinderPlot::mousePressEvent(QMouseEvent *event)
{
    if (event->button() == Qt::RightButton)
    {
        QMenu *menu = new QMenu("nom", plot);
        // ajout des actions
        QAction *a,*z;

        a=menu->addAction("reset y zoom");

        appendmenu(menu);
        z=execmenu(plot,menu,event->globalPos());
        delete menu;

        if(z==a)
        {
            //zoom to original size
            if(!invert_axis) {
                plot->setAxisScale(QwtPlot::yLeft, ymin_orig, ymax_orig);
            } else {
                plot->setAxisScale(QwtPlot::yLeft, xmin_orig, xmax_orig);
            }
            plot->replot();
        }
    }
}