/*!
\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 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();
}
}
/*!
\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 );
}
/*!
Update the axis scale draw geometries
\param azimuthMap Maps azimuth values to values related to 0.0, M_2PI
\param radialMap Maps radius values into painter coordinates.
\param pole Position of the pole in painter coordinates
\param radius Radius of the complete plot area in painter coordinates
\sa updateScaleDiv()
*/
void QwtPolarGrid::updateScaleDraws(
const QwtScaleMap &azimuthMap, const QwtScaleMap &radialMap,
const QwtDoublePoint &pole, double radius ) const
{
const QPoint p = pole.toPoint();
const QwtDoubleInterval interval =
d_data->gridData[QwtPolar::ScaleRadius].scaleDiv.interval();
const int min = radialMap.transform( interval.minValue() );
const int max = radialMap.transform( interval.maxValue() );
const int l = max - min;
for ( int axisId = 0; axisId < QwtPolar::AxesCount; axisId++ )
{
AxisData &axis = d_data->axisData[axisId];
if ( axisId == QwtPolar::AxisAzimuth )
{
QwtRoundScaleDraw *scaleDraw = ( QwtRoundScaleDraw * )axis.scaleDraw;
scaleDraw->setRadius( qRound( radius ) );
scaleDraw->moveCenter( p );
double from = ::fmod( 90.0 - azimuthMap.p1() * 180.0 / M_PI, 360.0 );
if ( from < 0.0 )
from += 360.0;
scaleDraw->setAngleRange( from, from - 360.0 );
scaleDraw->setTransformation( azimuthMap.transformation()->copy() );
}
else
{
QwtScaleDraw *scaleDraw = ( QwtScaleDraw * )axis.scaleDraw;
switch ( axisId )
{
case QwtPolar::AxisLeft:
{
scaleDraw->move( p.x() - min, p.y() );
scaleDraw->setLength( -l );
break;
}
case QwtPolar::AxisRight:
{
scaleDraw->move( p.x() + min, p.y() );
scaleDraw->setLength( l );
break;
}
case QwtPolar::AxisTop:
{
scaleDraw->move( p.x(), p.y() - max );
scaleDraw->setLength( l );
break;
}
case QwtPolar::AxisBottom:
{
scaleDraw->move( p.x(), p.y() + max );
scaleDraw->setLength( -l );
break;
}
}
scaleDraw->setTransformation( radialMap.transformation()->copy() );
}
}
}
/*!
\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
}