/*!
\brief Assign a scale division
The scale division determines where to set the tick marks.
\param transformation Transformation, needed to translate between
scale and pixal values
\param scaleDiv Scale Division
\sa For more information about scale divisions, see QwtScaleDiv.
*/
void QwtScaleWidget::setScaleDiv(
QwtScaleTransformation *transformation,
const QwtScaleDiv &scaleDiv )
{
QwtScaleDraw *sd = d_data->scaleDraw;
if ( sd->scaleDiv() != scaleDiv ||
sd->scaleMap().transformation()->type() != transformation->type() )
{
sd->setTransformation( transformation );
sd->setScaleDiv( scaleDiv );
layoutScale();
Q_EMIT scaleDivChanged();
}
else
{
/*
The transformation doesn't anything different as the
previous one. So we better throw it silently away instead of
initiating heavy updates
*/
delete transformation;
}
}
/*!
\brief Assign a scale division
The scale division determines where to set the tick marks.
\param scaleDiv Scale Division
\sa For more information about scale divisions, see QwtScaleDiv.
*/
void QwtScaleWidget::setScaleDiv( const QwtScaleDiv &scaleDiv )
{
QwtScaleDraw *sd = d_data->scaleDraw;
if ( sd->scaleDiv() != scaleDiv )
{
sd->setScaleDiv( scaleDiv );
layoutScale();
Q_EMIT scaleDivChanged();
}
}
void QwtPlotScaleItem::updateScaleDiv(const QwtScaleDiv& xScaleDiv,
const QwtScaleDiv& yScaleDiv)
{
QwtScaleDraw *sd = d_data->scaleDraw;
if ( d_data->scaleDivFromAxis && sd )
{
sd->setScaleDiv(
sd->orientation() == Qt::Horizontal ? xScaleDiv : yScaleDiv);
updateBorders();
}
}
/*!
\brief Assign a scale division
The scale division determines where to set the tick marks.
\param transformation Transformation, needed to translate between
scale and pixal values
\param scaleDiv Scale Division
\sa For more information about scale divisions, see QwtScaleDiv.
*/
void QwtScaleWidget::setScaleDiv(
const QwtScaleTransformation& transformation,
const QwtScaleDiv &scaleDiv)
{
QwtScaleDraw *sd = d_data->scaleDraw;
if (sd->scaleDiv() != scaleDiv ||
sd->map().transformation().xForm != transformation.xForm )
{
sd->setTransformation(transformation);
sd->setScaleDiv(scaleDiv);
layoutScale();
emit scaleDivChanged();
}
}
void QwtPlotScaleItem::updateScaleDiv( const QwtScaleDiv& xScaleDiv,
const QwtScaleDiv& yScaleDiv )
{
QwtScaleDraw *scaleDraw = d_data->scaleDraw;
if ( d_data->scaleDivFromAxis && scaleDraw )
{
const QwtScaleDiv &scaleDiv =
scaleDraw->orientation() == Qt::Horizontal ? xScaleDiv : yScaleDiv;
const QwtPlot *plt = plot();
if ( plt != NULL )
{
const QRectF canvasRect = plt->canvas()->contentsRect();
const QwtInterval interval = d_data->scaleInterval(
canvasRect, plt->canvasMap( xAxis() ), plt->canvasMap( yAxis() ) );
QwtScaleDiv sd = scaleDiv;
sd.setInterval( interval );
if ( sd != scaleDraw->scaleDiv() )
{
// the internal label cache of QwtScaleDraw
// is cleared here, so better avoid pointless
// assignments.
scaleDraw->setScaleDiv( sd );
}
}
else
{
scaleDraw->setScaleDiv( scaleDiv );
}
}
}
/*!
\brief Assign a scale division
The scale division determines where to set the tick marks.
\param transformation Transformation, needed to translate between
scale and pixal values
\param scaleDiv Scale Division
\sa For more information about scale divisions, see QwtScaleDiv.
*/
void QwtScaleWidget::setScaleDiv(
QwtScaleTransformation *transformation,
const QwtScaleDiv &scaleDiv)
{
QwtScaleDraw *sd = d_data->scaleDraw;
if (sd->scaleDiv() != scaleDiv ||
sd->map().transformation()->type() != transformation->type() )
{
sd->setTransformation(transformation);
sd->setScaleDiv(scaleDiv);
layoutScale();
emit scaleDivChanged();
}
else
delete transformation;
}
/*!
\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 );
}
