C++ (Cpp) labelMatrix Examples

Example #1

File: qwt_scale_draw.cpp Project: szmurlor/fiver

/*!
  Find the bounding rect for the label. The coordinates of
  the rect are absolute coordinates ( calculated from pos() ).
  in direction of the tick.

  \param font Font used for painting
  \param value Value

  \sa labelRect()
*/
QRect QwtScaleDraw::boundingLabelRect(const QFont &font, double value) const
{
    QwtText lbl = tickLabel(font, value);
    if ( lbl.isEmpty() )
        return QRect(); 

    const QPoint pos = labelPosition(value);
    QSize labelSize = lbl.textSize(font);
    if ( labelSize.height() % 2 )
        labelSize.setHeight(labelSize.height() + 1);

    const QwtMatrix m = labelMatrix( pos, labelSize);
    return m.mapRect(QRect(QPoint(0, 0), labelSize));
}

Example #2

void ScaleDraw::drawLabel(QPainter *painter, double value) const
{
    if (!d_plot)
        return;
    ScaleEngine *sc_engine = (ScaleEngine *)d_plot->axisScaleEngine(axis());
	/*QwtScaleEngine *qwtsc_engine=d_plot->axisScaleEngine(axis());
    ScaleEngine *sc_engine =dynamic_cast< ScaleEngine*>(qwtsc_engine);
	if(sc_engine!=NULL)
	{*/	
		if (sc_engine->hasBreak()){
			bool invertedScale = sc_engine->testAttribute(QwtScaleEngine::Inverted);
			if (invertedScale && sc_engine->axisBreakRight() == value)
				return;
			if (!invertedScale && sc_engine->axisBreakLeft() == value)
				return;
		}
	//}

		QwtText lbl = tickLabel(painter->font(), value);
		if (lbl.isEmpty())
			return;

		const QPoint pos = labelPosition(value);

		QSize labelSize = lbl.textSize(painter->font());
		if ( labelSize.height() % 2 )
			labelSize.setHeight(labelSize.height() + 1);

		const QMatrix m = labelMatrix(pos, labelSize);

		painter->save();
		painter->setMatrix(m, true);
		if (d_selected)
			lbl.setBackgroundPen(QPen(Qt::blue));
		else
			lbl.setBackgroundPen(QPen(Qt::NoPen));

		lbl.draw(painter, QRect(QPoint(0, 0), labelSize));
		painter->restore();
}

Example #3

File: qwt_scale_draw.cpp Project: szmurlor/fiver

/*!
  Find the bounding rect for the label. The coordinates of
  the rect are relative to spacing + ticklength from the backbone
  in direction of the tick.

  \param font Font used for painting
  \param value Value
*/
QRect QwtScaleDraw::labelRect(const QFont &font, double value) const
{   
    QwtText lbl = tickLabel(font, value);
    if ( lbl.isEmpty() )
        return QRect(0, 0, 0, 0);

    const QPoint pos = labelPosition(value);

    QSize labelSize = lbl.textSize(font);
    if ( labelSize.height() % 2 )
    {
        labelSize.setHeight(labelSize.height() + 1);
    }

    const QwtMatrix m = labelMatrix(pos, labelSize);

#if 0
    QRect br = QwtMetricsMap::translate(m, QRect(QPoint(0, 0), labelSize));
#else
    QwtPolygon pol(4);
    pol.setPoint(0, 0, 0); 
    pol.setPoint(1, 0, labelSize.height() - 1 );
    pol.setPoint(2, labelSize.width() - 1, 0);
    pol.setPoint(3, labelSize.width() - 1, labelSize.height() - 1 );

    pol = QwtMetricsMap::translate(m, pol);
    QRect br = pol.boundingRect();
#endif

#if QT_VERSION < 0x040000
    br.moveBy(-pos.x(), -pos.y());
#else
    br.translate(-pos.x(), -pos.y());
#endif

    return br;
}

Example #4

File: qwt_scale_draw.cpp Project: szmurlor/fiver

/*! 
   Draws the label for a major scale tick

   \param painter Painter
   \param value Value

   \sa drawTick(), drawBackbone(), boundingLabelRect()
*/
void QwtScaleDraw::drawLabel(QPainter *painter, double value) const
{
    QwtText lbl = tickLabel(painter->font(), value);
    if ( lbl.isEmpty() )
        return; 

    const QPoint pos = labelPosition(value);

    QSize labelSize = lbl.textSize(painter->font());
    if ( labelSize.height() % 2 )
        labelSize.setHeight(labelSize.height() + 1);
    
    const QwtMatrix m = labelMatrix( pos, labelSize);

    painter->save();
#if QT_VERSION < 0x040000
    painter->setWorldMatrix(m, true);
#else
    painter->setMatrix(m, true);
#endif

    lbl.draw (painter, QRect(QPoint(0, 0), labelSize) );
    painter->restore();
}

Example #5

File: ScaleDraw.cpp Project: BackupTheBerlios/qtiplot-svn

void ScaleDraw::drawLabel(QPainter *painter, double value) const
{
	if (!d_plot)
		return;

	ScaleEngine *sc_engine = (ScaleEngine *)d_plot->axisScaleEngine(axis());
	if (sc_engine->hasBreak() && sc_engine->axisBreakLeft() <= value && sc_engine->axisBreakRight() > value)
		return;

	QwtValueList majTicks = scaleDiv().ticks(QwtScaleDiv::MajorTick);
	if (majTicks.contains(value)){
		switch (d_show_ticks_policy){
			case ShowAll:
			break;

			case HideBegin:
				if (majTicks.first() == value)
					return;
			break;
			case HideEnd:
				if (majTicks.last() == value)
					return;
			break;
			case HideBeginEnd:
				if (majTicks.first() == value || majTicks.last() == value)
					return;
			break;
		}
	}

	QwtText lbl = tickLabel(painter->font(), value);
	if ( lbl.isEmpty() )
		return;

	QPoint pos = labelPosition(value);

	QSize labelSize = lbl.textSize(painter->font());
	if ( labelSize.height() % 2 )
		labelSize.setHeight(labelSize.height() + 1);

	const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
	QwtPainter::resetMetricsMap();

	labelSize = metricsMap.layoutToDevice(labelSize);
	pos = metricsMap.layoutToDevice(pos);

	painter->save();
	painter->setMatrix(labelMatrix( pos, labelSize), true);

	if (d_selected)
		lbl.setBackgroundPen(QPen(Qt::blue));
	else
		lbl.setBackgroundPen(QPen(Qt::NoPen));

	lbl.setRenderFlags(labelAlignment());

	lbl.draw (painter, QRect(QPoint(0, 0), labelSize) );

	QwtPainter::setMetricsMap(metricsMap); // restore metrics map

	painter->restore();
}