DimensionItem Class Reference

Brief description of class still missing. More...

#include <DimensionItem.h>

List of all members.

Public Member Functions
virtual QRectF	boundingRect () const
	DimensionItem (QGraphicsItem *parent=0)
	DimensionItem (const QLineF &l, QGraphicsItem *parent=0)
const QLineF &	line () const
virtual void	paint (QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
void	setFont (const QFont &f)
	~DimensionItem ()

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Detailed Description

Brief description of class still missing.

Full description of class still missing TODO: same structure as ellipse, based on PainterPath

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Constructor & Destructor Documentation

DimensionItem::DimensionItem

(

QGraphicsItem *

parent = 0

)

Description of constructor still missing

References TRACE.

    : QAbstractGraphicsShapeItem(parent)
{
  TRACE;
  _markSize=5.0;
  _textGap=3.0;
  _textPos=0.0;
  _textPrecision=1;
}

DimensionItem::DimensionItem	(	const QLineF &	l,
		QGraphicsItem *	parent = 0
	)

Description of constructor still missing

References TRACE.

    : QAbstractGraphicsShapeItem(parent)
{
  TRACE;
  setPos(l.p1());
  _line=l;
  _markSize=5.0;
  _textGap=3.0;
  _textPos=0.0;
  _textPrecision=1;
}

DimensionItem::~DimensionItem

(

)

Description of destructor still missing

References TRACE.

{
  TRACE;
}

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Member Function Documentation

QRectF DimensionItem::boundingRect

(

)

const [virtual]

References QGpCoreTools::Rect::enlarge(), and QGpCoreTools::LinearScale.

{
  Rect bRect(0.0, 0.0, _line.dx(), _line.dy());
  // Circle marks
  bRect.enlarge(_markSize*0.25, _markSize*0.25, ::LinearScale, ::LinearScale);
  Angle alpha(_line.dx(), _line.dy());
  qreal x,y;
  // Mark 1a
  x=- _markSize * alpha.sin();
  y=_markSize * alpha.cos();
  bRect.add(x, y);
  // Mark 1b
  x=_markSize * alpha.sin();
  y=-_markSize * alpha.cos();
  bRect.add(x, y);
  // Mark 2a
  x=_line.dx() - _markSize * alpha.sin();
  y=_line.dy() + _markSize * alpha.cos();
  bRect.add(x, y);
  // Mark 2b
  x=_line.dx() + _markSize * alpha.sin();
  y=_line.dy() - _markSize * alpha.cos();
  bRect.add(x, y);
  // Text
  qreal dist=_line.length();
  QFontMetricsF f(_textFont);
  QRectF textRect=f.boundingRect(QString::number(dist, 'f', _textPrecision) );
  qreal r1=0.5*dist+_textPos;
  r1-=0.5*textRect.width();
  x=r1 * alpha.cos();
  y=r1 * alpha.sin();
  qreal r2=textRect.height()+_textGap;
  x += r2 * alpha.sin();
  y -= r2 * alpha.cos();
  bRect.add(x, y);
  r1+=textRect.width();
  x=r1 * alpha.cos();
  y=r1 * alpha.sin();
  x += r2 * alpha.sin();
  y -= r2 * alpha.cos();
  bRect.add(x, y);
  // Pen width
  bRect.enlarge(pen().width()*0.5, ::LinearScale, ::LinearScale);

  return QRectF(bRect.x1(), bRect.y1(), bRect.width(), bRect.height());
}

const QLineF& DimensionItem::line

(

)

const [inline]

Referenced by DimensionItemDelegate::nodes().

{return _line;}

void DimensionItem::paint	(	QPainter *	painter,
		const QStyleOptionGraphicsItem *	option,
		QWidget *	widget
	)		[virtual]

References str.

{
  painter->save();
  qreal alpha=atan2(_line.dy(), _line.dx());
  painter->rotate(Angle::radiansToDegrees(alpha));
  painter->setPen(pen());
  qreal dist=_line.length();
  painter->drawLine(QLineF(0.0, 0.0, dist, 0.0));
  painter->drawEllipse(QRectF(-_markSize*0.1, -_markSize*0.1, _markSize*0.2, _markSize*0.2));
  painter->drawEllipse(QRectF(dist-_markSize*0.1, -_markSize*0.1, _markSize*0.2, _markSize*0.2));
  painter->drawLine(QLineF(0.0, -_markSize*0.5, 0.0, _markSize));
  painter->drawLine(QLineF(dist, -_markSize*0.5, dist, _markSize));
  QString str=QString::number(dist, 'f', _textPrecision);
  QPainterPath path;
  path.addText(0, 0, _textFont, str);
  QRectF textRect=path.boundingRect();
  painter->translate(0.5*dist+_textPos-textRect.width()*0.5-textRect.x(), -_textGap);
  painter->setBrush(brush());
  painter->setPen(Qt::NoPen);
  painter->drawPath(path);
  painter->restore();
}

void DimensionItem::setFont

(

const QFont &

f

)

[inline]

Referenced by DrawScene::addDimension().

{_textFont=f;}

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The documentation for this class was generated from the following files:

• fastmap/DimensionItem.h
• fastmap/DimensionItem.cpp