/*!
\return a minimum size hint
*/
QSize QwtScaleWidget::minimumSizeHint() const
{
const Qt::Orientation o = d_data->scaleDraw->orientation();
// Border Distance cannot be less than the scale borderDistHint
// Note, the borderDistHint is already included in minHeight/minWidth
int length = 0;
int mbd1, mbd2;
getBorderDistHint(mbd1, mbd2);
length += qwtMax( 0, d_data->borderDist[0] - mbd1 );
length += qwtMax( 0, d_data->borderDist[1] - mbd2 );
length += d_data->scaleDraw->minLength(
QPen(Qt::black, d_data->penWidth), font());
int dim = dimForLength(length, font());
if ( length < dim )
{
// compensate for long titles
length = dim;
dim = dimForLength(length, font());
}
QSize size(length + 2, dim);
if ( o == Qt::Vertical )
size.transpose();
return size;
}
/*!
Calculate the minimum length that is needed to draw the scale
\param pen Pen that is used for painting backbone and ticks
\param font Font used for painting the labels
\sa extent()
*/
int QwtScaleDraw::minLength(const QPen &pen, const QFont &font) const
{
int startDist, endDist;
getBorderDistHint(font, startDist, endDist);
const QwtScaleDiv &sd = scaleDiv();
const uint minorCount =
sd.ticks(QwtScaleDiv::MinorTick).count() +
sd.ticks(QwtScaleDiv::MediumTick).count();
const uint majorCount =
sd.ticks(QwtScaleDiv::MajorTick).count();
int lengthForLabels = 0;
if ( hasComponent(QwtAbstractScaleDraw::Labels) )
{
if ( majorCount >= 2 )
lengthForLabels = minLabelDist(font) * (majorCount - 1);
}
int lengthForTicks = 0;
if ( hasComponent(QwtAbstractScaleDraw::Ticks) )
{
const int pw = qwtMax( 1, pen.width() ); // penwidth can be zero
lengthForTicks = 2 * (majorCount + minorCount) * pw;
}
return startDist + endDist + qwtMax(lengthForLabels, lengthForTicks);
}
/*!
\return a minimum size hint
*/
QSize QwtScaleWidget::minimumSizeHint() const
{
const Qt::Orientation o = d_data->scaleDraw->orientation();
// Border Distance cannot be less than the scale borderDistHint
// Note, the borderDistHint is already included in minHeight/minWidth
int length = 0;
int mbd1, mbd2;
getBorderDistHint( mbd1, mbd2 );
length += qMax( 0, d_data->borderDist[0] - mbd1 );
length += qMax( 0, d_data->borderDist[1] - mbd2 );
length += d_data->scaleDraw->minLength( font() );
int dim = dimForLength( length, font() );
if ( length < dim )
{
// compensate for long titles
length = dim;
dim = dimForLength( length, font() );
}
QSize size( length + 2, dim );
if ( o == Qt::Vertical )
size.transpose();
int left, right, top, bottom;
getContentsMargins( &left, &top, &right, &bottom );
return size + QSize( left + right, top + bottom );
}
/*!
Calculate the minimum length that is needed to draw the scale
\param font Font used for painting the labels
\return Minimum length that is needed to draw the scale
\sa extent()
*/
int QwtScaleDraw::minLength( const QFont &font ) const
{
int startDist, endDist;
getBorderDistHint( font, startDist, endDist );
const QwtScaleDiv &sd = scaleDiv();
const uint minorCount =
sd.ticks( QwtScaleDiv::MinorTick ).count() +
sd.ticks( QwtScaleDiv::MediumTick ).count();
const uint majorCount =
sd.ticks( QwtScaleDiv::MajorTick ).count();
int lengthForLabels = 0;
if ( hasComponent( QwtAbstractScaleDraw::Labels ) )
lengthForLabels = minLabelDist( font ) * majorCount;
int lengthForTicks = 0;
if ( hasComponent( QwtAbstractScaleDraw::Ticks ) )
{
const double pw = qMax( 1, penWidth() ); // penwidth can be zero
lengthForTicks = qCeil( ( majorCount + minorCount ) * ( pw + 1.0 ) );
}
return startDist + endDist + qMax( lengthForLabels, lengthForTicks );
}
void QwtScaleWidget::layoutScale( bool update_geometry )
{
int bd0, bd1;
getBorderDistHint( bd0, bd1 );
if ( d_data->borderDist[0] > bd0 )
bd0 = d_data->borderDist[0];
if ( d_data->borderDist[1] > bd1 )
bd1 = d_data->borderDist[1];
int colorBarWidth = 0;
if ( d_data->colorBar.isEnabled && d_data->colorBar.interval.isValid() )
colorBarWidth = d_data->colorBar.width + d_data->spacing;
const QRectF r = contentsRect();
double x, y, length;
if ( d_data->scaleDraw->orientation() == Qt::Vertical )
{
y = r.top() + bd0;
length = r.height() - ( bd0 + bd1 );
if ( d_data->scaleDraw->alignment() == QwtScaleDraw::LeftScale )
x = r.right() - 1.0 - d_data->margin - colorBarWidth;
else
x = r.left() + d_data->margin + colorBarWidth;
}
else
{
x = r.left() + bd0;
length = r.width() - ( bd0 + bd1 );
if ( d_data->scaleDraw->alignment() == QwtScaleDraw::BottomScale )
y = r.top() + d_data->margin + colorBarWidth;
else
y = r.bottom() - 1.0 - d_data->margin - colorBarWidth;
}
d_data->scaleDraw->move( x, y );
d_data->scaleDraw->setLength( length );
const int extent = qCeil( d_data->scaleDraw->extent( font() ) );
d_data->titleOffset =
d_data->margin + d_data->spacing + colorBarWidth + extent;
if ( update_geometry )
{
updateGeometry();
update();
}
}
