git.maemo.org Git - mardrone/blob - mardrone/gauges/gaugearc.cpp

   1 #include "gaugearc.h"
   2
   3 #include "gaugetape.h"
   4 #include <stdio.h>
   5 #include <math.h>
   6 #include <qdebug.h>
   7
   8 GaugeArc::GaugeArc(QGraphicsItem *parent) :
   9     Gauge(parent)
  10 {
  11     QPainterPath scale;
  12     int xo=size().width()/2;
  13     int yo=size().height()/2;
  14
  15 #define DR 3.141592653/180.0
  16 #if 0
  17     for (i = 0; i < 5; i++) {
  18         fixo+=QLine(xo+arc0*cos(alpha*DR),yo-arc0*sin(alpha*DR),xo+arc1*cos(alpha*DR),yo-arc1*sin(alpha*DR));
  19
  20         scale.moveTo(xo+arc0*cos(alpha*DR),yo-arc0*sin(alpha*DR));
  21         scale.lineTo(xo+arc1*cos(alpha*DR),yo-arc1*sin(alpha*DR));
  22
  23         fixo+=QLine(xo+arc0*cos(alpha*DR),yo-arc0*sin(alpha*DR),xo+arc1*cos(alpha*DR),yo-arc1*sin(alpha*DR));
  24     };
  25 #endif
  26 }
  27
  28
  29 void GaugeArc::paintArcScale(QPainter *painter,int width,int height)
  30 {
  31     float alpha;
  32     int xo=(width/2);
  33     int yo=(height/2);
  34     int arcsize=xo-5;
  35      painter->setTransform(QTransform().translate(scenePos().x()+width/2,scenePos().y()+height/2).scale(m_scale,m_scale));
  36     QTransform savematrix= painter->transform ();
  37     QPen pen(m_color);
  38     pen.setWidth(m_lineWidth);
  39
  40     QPen nopen(Qt::NoPen);
  41     QBrush cbrush(m_color);
  42     QBrush nbrush(Qt::NoBrush);
  43     QBrush backBrush(m_backColor);
  44    // QBrush cbrush(m_color);
  45     painter->setBrush(cbrush);
  46     alpha=m_lowPosition;
  47     int val=m_low;
  48     painter->setFont(m_font);
  49     QFontMetrics fm(m_font);
  50     QPolygon needle;
  51
  52     //painter->setTransform(QTransform().translate(xo+scenePos().x()/m_scale, yo+scenePos().y()/m_scale),true);
  53     painter->setBrush(backBrush);
  54     painter->setPen(nopen);
  55     painter->drawChord(QRect(-xo,-xo,2*xo,2*xo),0,360*16);
  56     painter->setBrush(cbrush);
  57     painter->setPen(pen);
  58     while(alpha<=(m_highPosition<m_lowPosition?m_highPosition+360:m_highPosition)) {
  59         QTransform rotT;
  60         rotT.rotate(alpha);
  61         QString label;
  62         label=QString("%1").arg(val);
  63         int labelWidth=fm.width(label);
  64         int labelHeight=fm.height();
  65         painter->setTransform(savematrix);
  66         painter->drawArc(-arcsize,-arcsize,2*arcsize,2*arcsize,(int(m_lowPosition+270)%360)*-16,(int(m_highPosition+270)%360)*-16);
  67         QPoint labelP=QPoint(0,-xo+15);
  68         labelP=rotT.map(labelP);
  69         QPoint lineInP=QPoint(0,-xo+2);
  70         lineInP=rotT.map(lineInP);
  71         QPoint lineOutP=QPoint(0,-xo+12);
  72         lineOutP=rotT.map(lineOutP);
  73         QPoint labelPo=QPoint(labelWidth*((-1-sin(3.1415926/180*alpha))/2),labelHeight*((1+cos(3.1415926/180*alpha))/2));
  74         QPoint labelPd=labelP+labelPo;
  75    //      qDebug() << alpha << labelP << labelPd << labelPo << labelWidth << labelHeight;
  76         painter->drawText(labelPd,label);
  77         painter->drawLine(lineInP,lineOutP);
  78         alpha+=m_tickSpacing?m_tickSpacing:10;
  79         val+=m_tickIncrement;
  80     }
  81     needle+=QPoint(-5,0);
  82     needle+=QPoint(0,-xo);
  83     needle+=QPoint(5,0);
  84     needle+=QPoint(-5,0);
  85     painter->setTransform(QTransform().rotate(m_lowPosition+(m_value*1.0*m_tickSpacing/m_tickIncrement)),true);
  86     painter->drawPolygon(needle);
  87 }
  88
  89 void GaugeArc::paint(QPainter *painter,const QStyleOptionGraphicsItem *option,
  90                            QWidget *widget)
  91 {
  92         paintArcScale(painter,size().width(),size().height());
  93     //    paintNeedle(painter,val,size().width(),size().height());
  94 };
  95