src/GUI/axislabelitem.cpp

   1 #include <QPainter>
   2 #include <QFontMetrics>
   3 #include "font.h"
   4 #include "axislabelitem.h"
   5
   6
   7 AxisLabelItem::AxisLabelItem(Type type, QGraphicsItem *parent)
   8   : QGraphicsItem(parent), _type(type)
   9 {
  10         _font.setPixelSize(FONT_SIZE);
  11         _font.setFamily(FONT_FAMILY);
  12 }
  13
  14 void AxisLabelItem::setLabel(const QString& label, const QString &units)
  15 {
  16         prepareGeometryChange();
  17         QFontMetrics fm(_font);
  18         _label = QString("%1 [%2]").arg(label, units.isEmpty() ? "-" : units);
  19         _labelBB = fm.tightBoundingRect(_label);
  20         updateBoundingRect();
  21         update();
  22 }
  23
  24 void AxisLabelItem::updateBoundingRect()
  25 {
  26         QFontMetrics fm(_font);
  27
  28         if (_type == X)
  29                 _boundingRect = QRectF(0, 0, _labelBB.width(), fm.height());
  30         else
  31                 _boundingRect = QRectF(0, 0, fm.height(), _labelBB.width());
  32 }
  33
  34 void AxisLabelItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
  35   QWidget *widget)
  36 {
  37         Q_UNUSED(option);
  38         Q_UNUSED(widget);
  39         QFontMetrics fm(_font);
  40
  41         painter->setFont(_font);
  42
  43         if (_type == X) {
  44                 painter->drawText(0, fm.height() - fm.descent(), _label);
  45         } else {
  46                 painter->rotate(-90);
  47                 painter->drawText(-_labelBB.width(), fm.height() - fm.descent(), _label);
  48                 painter->rotate(90);
  49         }
  50
  51         //painter->setRenderHint(QPainter::Antialiasing, false);
  52         //painter->setPen(Qt::red);
  53         //painter->drawRect(boundingRect());
  54 }