src/GUI/coordinatesitem.cpp

   1 #include <QFontMetrics>
   2 #include <QPainter>
   3 #include "font.h"
   4 #include "coordinatesitem.h"
   5
   6
   7 CoordinatesItem::CoordinatesItem(QGraphicsItem *parent) : QGraphicsItem(parent)
   8 {
   9         _format = DecimalDegrees;
  10         _units = Metric;
  11         _ele = NAN;
  12         _color = Qt::black;
  13         _bgColor = Qt::white;
  14         _drawBackground = false;
  15         _font.setPixelSize(FONT_SIZE);
  16         _font.setFamily(FONT_FAMILY);
  17         _digitalZoom = 0;
  18
  19         setAcceptHoverEvents(true);
  20
  21         updateBoundingRect();
  22 }
  23
  24 void CoordinatesItem::paint(QPainter *painter,
  25   const QStyleOptionGraphicsItem *option, QWidget *widget)
  26 {
  27         Q_UNUSED(option);
  28         Q_UNUSED(widget);
  29
  30         if (!_c.isValid())
  31                 return;
  32
  33         if (_drawBackground) {
  34                 painter->setPen(Qt::NoPen);
  35                 QColor bc(_bgColor);
  36                 bc.setAlpha(196);
  37                 painter->setBrush(QBrush(bc));
  38                 painter->drawRect(_boundingRect);
  39                 painter->setBrush(Qt::NoBrush);
  40         }
  41
  42         QFontMetrics fm(_font);
  43         painter->setFont(_font);
  44         painter->setPen(QPen(_color));
  45         painter->drawText(0, -fm.descent(), text());
  46
  47         //painter->setPen(Qt::red);
  48         //painter->drawRect(boundingRect());
  49 }
  50
  51 void CoordinatesItem::setCoordinates(const Coordinates &c, qreal elevation)
  52 {
  53         prepareGeometryChange();
  54
  55         _c = c;
  56         _ele = elevation;
  57
  58         updateBoundingRect();
  59         update();
  60 }
  61
  62 void CoordinatesItem::setFormat(CoordinatesFormat format)
  63 {
  64         prepareGeometryChange();
  65
  66         _format = format;
  67         updateBoundingRect();
  68 }
  69
  70 void CoordinatesItem::setUnits(Units units)
  71 {
  72         prepareGeometryChange();
  73
  74         _units = units;
  75         updateBoundingRect();
  76 }
  77
  78 void CoordinatesItem::setDigitalZoom(qreal zoom)
  79 {
  80         _digitalZoom = zoom;
  81         setScale(pow(2, -_digitalZoom));
  82 }
  83
  84 QString CoordinatesItem::text() const
  85 {
  86         return (std::isnan(_ele))
  87           ? Format::coordinates(_c, _format)
  88           : Format::coordinates(_c, _format) + ", " + Format::elevation(_ele, _units);
  89 }
  90
  91 void CoordinatesItem::updateBoundingRect()
  92 {
  93         QFontMetrics fm(_font);
  94
  95         QRectF br(fm.tightBoundingRect(text()));
  96         QRectF r1(br);
  97         QRectF r2(br);
  98         r1.moveTop(-fm.ascent());
  99         r2.moveBottom(-fm.descent());
 100
 101         _boundingRect = r1 | r2;
 102 }
 103
 104 void CoordinatesItem::setColor(const QColor &color)
 105 {
 106         _color = color;
 107         update();
 108 }
 109
 110 void CoordinatesItem::setBackgroundColor(const QColor &color)
 111 {
 112         _bgColor = color;
 113         update();
 114 }
 115
 116 void CoordinatesItem::drawBackground(bool draw)
 117 {
 118         _drawBackground = draw;
 119         update();
 120 }