/*!
Calculate the width/height that is needed for a
vertical/horizontal scale.
The extent is calculated from the pen width of the backbone,
the major tick length, the spacing and the maximum width/height
of the labels.
\param pen Pen that is used for painting backbone and ticks
\param font Font used for painting the labels
\sa minLength()
*/
int QwtScaleDraw::extent(const QPen &pen, const QFont &font) const
{
int d = 0;
if ( hasComponent(QwtAbstractScaleDraw::Labels) )
{
if ( orientation() == Qt::Vertical )
d = maxLabelWidth(font);
else
d = maxLabelHeight(font);
if ( d > 0 )
d += spacing();
}
if ( hasComponent(QwtAbstractScaleDraw::Ticks) )
{
d += majTickLength();
}
if ( hasComponent(QwtAbstractScaleDraw::Backbone) )
{
const int pw = qwtMax( 1, pen.width() ); // penwidth can be zero
d += pw;
}
d = qwtMax(d, minimumExtent());
return d;
}
void ScaleDraw::drawBreak(QPainter *painter) const {
ScaleEngine *sc_engine =
static_cast<ScaleEngine *>(d_plot->axisScaleEngine(axis()));
/*const QwtScaleEngine * qwtsc_engine=d_plot->axisScaleEngine(axis());
const ScaleEngine *sc_engine =dynamic_cast<const ScaleEngine*>(qwtsc_engine);
if(sc_engine!=NULL)
{*/
if (!sc_engine->hasBreak() || !sc_engine->hasBreakDecoration())
return;
painter->save();
painter->setRenderHint(QPainter::Antialiasing);
int len = majTickLength();
QwtScaleMap scaleMap = map();
const QwtMetricsMap metricsMap = QwtPainter::metricsMap();
QPoint pos = this->pos();
if (!metricsMap.isIdentity()) {
QwtPainter::resetMetricsMap();
pos = metricsMap.layoutToDevice(pos);
if (orientation() == Qt::Vertical) {
scaleMap.setPaintInterval(metricsMap.layoutToDeviceY((int)scaleMap.p1()),
metricsMap.layoutToDeviceY((int)scaleMap.p2()));
len = metricsMap.layoutToDeviceX(len);
} else {
scaleMap.setPaintInterval(metricsMap.layoutToDeviceX((int)scaleMap.p1()),
metricsMap.layoutToDeviceX((int)scaleMap.p2()));
len = metricsMap.layoutToDeviceY(len);
}
}
int lval = scaleMap.transform(sc_engine->axisBreakLeft());
int rval = scaleMap.transform(sc_engine->axisBreakRight());
switch (alignment()) {
case LeftScale:
QwtPainter::drawLine(painter, pos.x(), lval, pos.x() - len, lval + len);
QwtPainter::drawLine(painter, pos.x(), rval, pos.x() - len, rval + len);
break;
case RightScale:
QwtPainter::drawLine(painter, pos.x(), lval, pos.x() + len, lval - len);
QwtPainter::drawLine(painter, pos.x(), rval, pos.x() + len, rval - len);
break;
case BottomScale:
QwtPainter::drawLine(painter, lval, pos.y(), lval - len, pos.y() + len);
QwtPainter::drawLine(painter, rval, pos.y(), rval - len, pos.y() + len);
break;
case TopScale:
QwtPainter::drawLine(painter, lval, pos.y(), lval + len, pos.y() - len);
QwtPainter::drawLine(painter, rval, pos.y(), rval + len, pos.y() - len);
break;
}
QwtPainter::setMetricsMap(metricsMap); // restore metrics map
painter->restore();
//}
}
/*!
Find the position, where to paint a label
The position has a distance of majTickLength() + spacing() + 1
from the backbone. The direction depends on the alignment()
\param value Value
*/
QPointF QwtScaleDraw::labelPosition( double value ) const
{
const double tval = map().transform( value );
double dist = spacing();
if ( hasComponent( QwtAbstractScaleDraw::Backbone ) )
dist += qMax( 1, penWidth() );
if ( hasComponent( QwtAbstractScaleDraw::Ticks ) )
dist += majTickLength();
double px = 0;
double py = 0;
switch ( alignment() )
{
case RightScale:
{
px = d_data->pos.x() + dist;
py = tval;
break;
}
case LeftScale:
{
px = d_data->pos.x() - dist;
py = tval;
break;
}
case BottomScale:
{
px = tval;
py = d_data->pos.y() + dist;
break;
}
case TopScale:
{
px = tval;
py = d_data->pos.y() - dist;
break;
}
}
return QPointF( px, py );
}
