Sh3/graphicsviewmod.cpp

#include "graphicsviewmod.h"


GraphicsViewMod::GraphicsViewMod(QWidget *parent):QGraphicsView(parent)
{
    setViewportUpdateMode(QGraphicsView::FullViewportUpdate);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
    scMeter = 1;
    ugR = ugL = numT = 0;

}


void GraphicsViewMod::drawBackground(QPainter *painter, const QRectF &rect)
{

    painter->save();
    painter->setBrush(QBrush(Qt::black));
    painter->drawRect(rect);
    painter->restore();

    painter->setBackground(QBrush(Qt::black));
    painter->setBackground(QBrush(Qt::SolidPattern));

    QPen p = painter->pen();
    painter->setPen(QColor(Qt::lightGray));


    qreal d = 30;
    qreal rad = height()/2 - d;
    QPointF cent=QPointF(width()/2, height()/2);
    QRect cr = QRect(cent.x()-rad, cent.y()-rad, rad*2, rad*2);



    painter->drawEllipse(mapToScene(QPolygon(cr)).boundingRect());

    qreal lx1, lx2, ly1, ly2;
    qreal phi;
    qreal lin = 2;
    QPolygonF poly;
    QString str;
    QFont f  = painter->font();

    cr.setSize(QSize(1,1));
    qreal fs = mapToScene(cr).boundingRect().height();

    f.setPointSizeF(fs*10);
    painter->setFont(f);


    for (int i=0; i<60; i++)
    {
        phi = 2*M_PI/60*i;

        lx1=(rad-lin)*sin(phi)+cent.x();
        ly1=-(rad-lin)*cos(phi)+cent.y();

        lx2 = lx1+2*lin*sin(phi);
        ly2 = ly1-2*lin*cos(phi);

        poly.clear();
        poly << mapToScene(QPoint(lx1, ly1)) << mapToScene(QPoint(lx2, ly2));
        painter->drawPolygon(poly);

        lx2 = lx1+6*lin*sin(phi)-4;
        ly2 = ly1-6*lin*cos(phi)+4;


        str = QString::number(i);


        painter->drawText(mapToScene(QPoint(lx2, ly2)), str);

    }


    int du, mdu;
    str.clear();
    if (ugL<0){  str.append("-");}

        du = abs(ugL)/100; mdu = abs(ugL)%100;
        if (du<10) str.append("0");
        str.append(QString::number(du));
        str.append("-");
        if (mdu<10) str.append("0");
        str.append(QString::number(mdu));

    painter->drawText(mapToScene(QPoint(width()-45, 22)), str);

    str.clear();
    if (ugR<0) { str.append("-");}

        du = abs(ugR)/100; mdu = abs(ugR)%100;
        if (du<10) str.append("0");
        str.append(QString::number(du));
        str.append("-");
        if (mdu<10) str.append("0");
        str.append(QString::number(mdu));

    painter->drawText(mapToScene(QPoint(width()-45, 33)), str);

    if (numT<0) numT = 0;
    str.setNum(numT);
    painter->drawText(mapToScene(QPoint(width()-45, 44)), str);

//    str.setNum(scMeter);
//    painter->drawText(mapToScene(QPoint(cent.x()+40,cent.y()+40)), str);


}




void GraphicsViewMod::wheelEvent(QWheelEvent *e)
{
    int num = e->delta()/120;
    if (num!=0)
    {


    }

    e->accept();
    centerOn(0,0);

}