/*!
Change the alignment of the scale
The alignment sets the orientation of the scale and the position of
the ticks:
- QwtScaleDraw::BottomScale: horizontal, ticks below
- QwtScaleDraw::TopScale: horizontal, ticks above
- QwtScaleDraw::LeftScale: vertical, ticks left
- QwtScaleDraw::RightScale: vertical, ticks right
For horizontal scales the position corresponds to QwtPlotItem::yAxis(),
otherwise to QwtPlotItem::xAxis().
\sa scaleDraw(), QwtScaleDraw::alignment(), setPosition()
*/
void QwtPlotScaleItem::setAlignment( QwtScaleDraw::Alignment alignment )
{
QwtScaleDraw *sd = d_data->scaleDraw;
if ( sd->alignment() != alignment )
{
sd->setAlignment( alignment );
itemChanged();
}
}
/*!
\brief Draw the scale
*/
void QwtPlotScaleItem::draw( QPainter *painter,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRectF &canvasRect ) const
{
QwtScaleDraw *sd = d_data->scaleDraw;
if ( d_data->scaleDivFromAxis )
{
const QwtInterval interval =
d_data->scaleInterval( canvasRect, xMap, yMap );
if ( interval != sd->scaleDiv().interval() )
{
QwtScaleDiv scaleDiv = sd->scaleDiv();
scaleDiv.setInterval( interval );
sd->setScaleDiv( scaleDiv );
}
}
QPen pen = painter->pen();
pen.setStyle( Qt::SolidLine );
painter->setPen( pen );
if ( sd->orientation() == Qt::Horizontal )
{
double y;
if ( d_data->borderDistance >= 0 )
{
if ( sd->alignment() == QwtScaleDraw::BottomScale )
y = canvasRect.top() + d_data->borderDistance;
else
{
y = canvasRect.bottom() - d_data->borderDistance;
}
}
else
{
y = yMap.transform( d_data->position );
}
if ( y < canvasRect.top() || y > canvasRect.bottom() )
return;
sd->move( canvasRect.left(), y );
sd->setLength( canvasRect.width() - 1 );
QwtTransform *transform = NULL;
if ( xMap.transformation() )
transform = xMap.transformation()->copy();
sd->setTransformation( transform );
}
else // == Qt::Vertical
{
double x;
if ( d_data->borderDistance >= 0 )
{
if ( sd->alignment() == QwtScaleDraw::RightScale )
x = canvasRect.left() + d_data->borderDistance;
else
{
x = canvasRect.right() - d_data->borderDistance;
}
}
else
{
x = xMap.transform( d_data->position );
}
if ( x < canvasRect.left() || x > canvasRect.right() )
return;
sd->move( x, canvasRect.top() );
sd->setLength( canvasRect.height() - 1 );
QwtTransform *transform = NULL;
if ( yMap.transformation() )
transform = yMap.transformation()->copy();
sd->setTransformation( transform );
}
painter->setFont( d_data->font );
sd->draw( painter, d_data->palette );
}
/*!
\brief Draw the scale
*/
void QwtPlotScaleItem::draw(QPainter *painter,
const QwtScaleMap &xMap, const QwtScaleMap &yMap,
const QRect &canvasRect) const
{
if ( canvasRect != d_data->canvasRectCache )
{
QwtPlotScaleItem* that = (QwtPlotScaleItem*)this;
that->updateBorders();
}
QPen pen = painter->pen();
pen.setStyle(Qt::SolidLine);
painter->setPen(pen);
int pw = painter->pen().width();
if ( pw == 0 )
pw = 1;
QwtScaleDraw *sd = d_data->scaleDraw;
if ( sd->orientation() == Qt::Horizontal )
{
int y;
if ( d_data->borderDistance >= 0 )
{
if ( sd->alignment() == QwtScaleDraw::BottomScale )
y = canvasRect.top() + d_data->borderDistance;
else
{
y = canvasRect.bottom() - d_data->borderDistance - pw + 1;
}
}
else
{
y = yMap.transform(d_data->position);
}
if ( y < canvasRect.top() || y > canvasRect.bottom() )
return;
sd->move(canvasRect.left(), y);
sd->setLength(canvasRect.width() - 1);
sd->setTransformation(xMap.transformation()->copy());
}
else // == Qt::Vertical
{
int x;
if ( d_data->borderDistance >= 0 )
{
if ( sd->alignment() == QwtScaleDraw::RightScale )
x = canvasRect.left() + d_data->borderDistance;
else
{
x = canvasRect.right() - d_data->borderDistance - pw + 1;
}
}
else
{
x = xMap.transform(d_data->position);
}
if ( x < canvasRect.left() || x > canvasRect.right() )
return;
sd->move(x, canvasRect.top());
sd->setLength(canvasRect.height() - 1);
sd->setTransformation(yMap.transformation()->copy());
}
painter->setFont(d_data->font);
#if QT_VERSION < 0x040000
sd->draw(painter, d_data->colorGroup);
#else
sd->draw(painter, d_data->palette);
#endif
}