/*!
Expand the selected rectangle to minZoomSize() and zoom in
if accepted.
\sa accept(), minZoomSize()
*/
bool QwtPlotZoomer::end( bool ok )
{
ok = QwtPlotPicker::end( ok );
if ( !ok )
return false;
QwtPlot *plot = QwtPlotZoomer::plot();
if ( !plot )
return false;
const QPolygon &pa = selection();
if ( pa.count() < 2 )
return false;
QRect rect = QRect( pa[0], pa[int( pa.count() - 1 )] );
rect = rect.normalized();
QRectF zoomRect = invTransform( rect ).normalized();
const QSizeF minSize = minZoomSize();
if ( minSize.isValid() )
{
const QPointF center = zoomRect.center();
zoomRect.setSize( zoomRect.size().expandedTo( minZoomSize() ) );
zoomRect.moveCenter( center );
}
zoom( zoomRect );
return true;
}
bool PlotZoomer::end(bool ok)
{
// Code here is taken from QwtPlotZoomer. The only modification is around the _zoomMode handling.
ok = QwtPlotPicker::end(ok);
if (!ok)
{
return false;
}
QwtPlot *plot = QwtPlotZoomer::plot();
if (!plot)
{
return false;
}
const QPolygon &pa = selection();
if (pa.count() < 2)
{
return false;
}
QRect rect = QRect(pa[0], pa[int(pa.count() - 1)]);
rect = rect.normalized();
QRectF currentZoomRect = zoomRect();
QRectF zoomRect = invTransform(rect).normalized();
switch (_zoomMode)
{
default:
case ZoomBoth:
// nothing.
break;
case ZoomX:
// Maintain current zoom y and height.
zoomRect.setY(currentZoomRect.y());
zoomRect.setHeight(currentZoomRect.height());
break;
case ZoomY:
// Maintain current zoom x and width.
zoomRect.setX(currentZoomRect.x());
zoomRect.setWidth(currentZoomRect.width());
break;
}
const QSizeF minSize = minZoomSize();
if (minSize.isValid())
{
const QPointF center = zoomRect.center();
zoomRect.setSize(zoomRect.size().expandedTo(minZoomSize()));
zoomRect.moveCenter(center);
}
zoom(zoomRect);
return true;
}
/*!
Expand the selected rectangle to minZoomSize() and zoom in
if accepted.
\param ok If true, complete the selection and emit selected signals
otherwise discard the selection.
\sa accept(), minZoomSize()
\return True if the selection has been accepted, false otherwise
*/
bool QwtPlotZoomer::end( bool ok )
{
ok = QwtPlotPicker::end( ok );
if ( !ok )
return false;
QwtPlot *plot = QwtPlotZoomer::plot();
if ( !plot )
return false;
const QPolygon &pa = selection();
if ( pa.count() < 2 )
return false;
QRect rect = QRect( pa.first(), pa.last() );
rect = rect.normalized();
const QwtScaleMap xMap = plot->canvasMap( xAxis() );
const QwtScaleMap yMap = plot->canvasMap( yAxis() );
QRectF zoomRect = QwtScaleMap::invTransform( xMap, yMap, rect ).normalized();
zoomRect = qwtExpandedZoomRect( zoomRect, minZoomSize(),
xMap.transformation(), yMap.transformation() );
zoom( zoomRect );
return true;
}
/*!
Expand the selected rectangle to minZoomSize() and zoom in
if accepted.
\sa QwtPlotZoomer::accept()a, QwtPlotZoomer::minZoomSize()
*/
bool QwtPlotZoomer::end(bool ok)
{
ok = QwtPlotPicker::end(ok);
if (!ok)
return false;
QwtPlot *plot = QwtPlotZoomer::plot();
if ( !plot )
return false;
const QwtPolygon &pa = selection();
if ( pa.count() < 2 )
return false;
QRect rect = QRect(pa[0], pa[int(pa.count() - 1)]);
#if QT_VERSION < 0x040000
rect = rect.normalize();
#else
rect = rect.normalized();
#endif
QwtDoubleRect zoomRect = invTransform(rect).normalized();
const QwtDoublePoint center = zoomRect.center();
zoomRect.setSize(zoomRect.size().expandedTo(minZoomSize()));
zoomRect.moveCenter(center);
zoom(zoomRect);
return true;
}
/*!
Rejects selections, when the stack depth is too deep, or
the zoomed rectangle is minZoomSize().
\sa minZoomSize(), maxStackDepth()
*/
void QwtPlotZoomer::begin()
{
if ( d_data->maxStackDepth >= 0 )
{
if ( d_data->zoomRectIndex >= uint( d_data->maxStackDepth ) )
return;
}
const QSizeF minSize = minZoomSize();
if ( minSize.isValid() )
{
const QSizeF sz =
d_data->zoomStack[d_data->zoomRectIndex].size() * 0.9999;
if ( minSize.width() >= sz.width() &&
minSize.height() >= sz.height() )
{
return;
}
}
QwtPlotPicker::begin();
}