src/GUI/sliderinfoitem.cpp

   1 #include <QPainter>
   2 #include "font.h"
   3 #include "sliderinfoitem.h"
   4
   5
   6 #define SIZE 5
   7
   8 SliderInfoItem::SliderInfoItem(QGraphicsItem *parent) : QGraphicsItem(parent)
   9 {
  10         _side = Right;
  11         _color = Qt::red;
  12
  13         _font.setPixelSize(FONT_SIZE);
  14         _font.setFamily(FONT_FAMILY);
  15 }
  16
  17 void SliderInfoItem::updateBoundingRect()
  18 {
  19         QFontMetrics fm(_font);
  20
  21         qreal width = qMax(fm.boundingRect(_x).width(), fm.boundingRect(_y).width());
  22         qreal height = 2 * fm.height() - 2*fm.descent();
  23
  24         _boundingRect = (_side == Right)
  25           ? QRectF(-SIZE/2, -height/2, width + 1.5*SIZE, height)
  26           : QRectF(-(width + SIZE), -height/2, width + 1.5*SIZE, height);
  27 }
  28
  29 void SliderInfoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem
  30   *option, QWidget *widget)
  31 {
  32         Q_UNUSED(option);
  33         Q_UNUSED(widget);
  34         QFontMetrics fm(_font);
  35         QRectF rx, ry;
  36
  37
  38         qreal width = qMax(fm.boundingRect(_x).width(), fm.boundingRect(_y).width());
  39         if (_side == Right) {
  40                 ry = QRectF(SIZE, -fm.height() + fm.descent(), fm.boundingRect(_y).width(),
  41                   fm.height() - fm.descent());
  42                 rx = QRectF(SIZE, 0, fm.boundingRect(_x).width(), fm.height()
  43                   - fm.descent());
  44         } else {
  45                 ry = QRectF(-(width + SIZE), -fm.height() + fm.descent(),
  46                   fm.boundingRect(_y).width(), fm.height() - fm.descent());
  47                 rx = QRectF(-(width + SIZE), 0, fm.boundingRect(_x).width(), fm.height()
  48                   - fm.descent());
  49         }
  50
  51         painter->setPen(Qt::NoPen);
  52         QColor bc(painter->background().color());
  53         bc.setAlpha(196);
  54         painter->setBrush(QBrush(bc));
  55         painter->drawRect(ry);
  56         painter->drawRect(rx);
  57         painter->setBrush(Qt::NoBrush);
  58
  59         painter->setFont(_font);
  60         painter->setRenderHint(QPainter::Antialiasing, false);
  61         painter->setPen(_color);
  62
  63         if (_side == Right) {
  64                 painter->drawText(SIZE, -fm.descent()/2, _y);
  65                 painter->drawText(SIZE, fm.height() - fm.descent()*1.5, _x);
  66         } else {
  67                 painter->drawText(-(width + SIZE), -fm.descent()/2, _y);
  68                 painter->drawText(-(width + SIZE), fm.height() - fm.descent()*1.5, _x);
  69         }
  70         painter->drawLine(QPointF(-SIZE/2, 0), QPointF(SIZE/2, 0));
  71
  72         //painter->drawRect(boundingRect());
  73 }
  74
  75 void SliderInfoItem::setText(const QString &x, const QString &y)
  76 {
  77         prepareGeometryChange();
  78         _x = x; _y = y;
  79         updateBoundingRect();
  80 }
  81
  82 void SliderInfoItem::setSide(Side side)
  83 {
  84         if (side == _side)
  85                 return;
  86
  87         prepareGeometryChange();
  88         _side = side;
  89         updateBoundingRect();
  90 }
  91
  92 void SliderInfoItem::setColor(const QColor &color)
  93 {
  94         _color = color;
  95         update();
  96 }