src/GUI/pathtickitem.cpp

   1 #include <QPainter>
   2 #include <QCursor>
   3 #include <QGraphicsSceneMouseEvent>
   4 #include "font.h"
   5 #include "popup.h"
   6 #include "pathitem.h"
   7 #include "pathtickitem.h"
   8
   9
  10 static QFont defaultFont()
  11 {
  12         QFont font;
  13         font.setPixelSize(10);
  14         font.setFamily(FONT_FAMILY);
  15         font.setBold(true);
  16
  17         return font;
  18 }
  19
  20 QFont PathTickItem::_font = defaultFont();
  21
  22 PathTickItem::PathTickItem(const QRectF &tickRect, int value,
  23   QGraphicsItem *parent) : GraphicsItem(parent), _tickRect(tickRect),
  24   _text(QString::number(value))
  25 {
  26         _tickRect.moveCenter(QPointF(0, -_tickRect.height()/2.0 - 3));
  27
  28         setCursor(Qt::ArrowCursor);
  29         setAcceptHoverEvents(true);
  30 }
  31
  32 QRectF PathTickItem::boundingRect() const
  33 {
  34         return _tickRect.adjusted(0, 0, 0, 3);
  35 }
  36
  37 void PathTickItem::paint(QPainter *painter,
  38   const QStyleOptionGraphicsItem *option, QWidget *widget)
  39 {
  40         Q_UNUSED(option);
  41         Q_UNUSED(widget);
  42
  43         QPointF arrow[3] = {QPointF(0, 0), QPointF(3, -3), QPointF(-3, -3)};
  44
  45         painter->setFont(_font);
  46         painter->setRenderHint(QPainter::Antialiasing, false);
  47
  48         painter->setPen(Qt::white);
  49         painter->setBrush(_brush);
  50         painter->drawPolygon(arrow, 3);
  51         painter->drawRoundedRect(_tickRect, 1.5, 1.5);
  52         painter->drawText(_tickRect, Qt::AlignCenter, _text);
  53
  54 /*
  55         painter->setBrush(Qt::NoBrush);
  56         painter->setPen(Qt::red);
  57         painter->drawRect(boundingRect());
  58 */
  59 }
  60
  61 void PathTickItem::setPos(const QPointF &pos)
  62 {
  63         /* For propper rounded rect rendering, the item must be positioned in the
  64            middle of a pixel */
  65         QPoint p(pos.toPoint());
  66         QGraphicsItem::setPos(QPointF(p.x() - 0.5, p.y() - 0.5));
  67 }
  68
  69 QRect PathTickItem::tickRect(int value)
  70 {
  71         QFontMetrics fm(_font);
  72         return fm.boundingRect(QRect(), Qt::AlignCenter,
  73           QString::number(qMax(value, 10))).adjusted(-2, 0, 2, 0);
  74 }
  75
  76 void PathTickItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
  77 {
  78         const PathItem *pi = static_cast<PathItem*>(parentItem());
  79         Popup::show(event->screenPos(), pi->info(), event->widget());
  80         QGraphicsItem::mousePressEvent(event);
  81 }