static QwtGraphic qwtPathGraphic( const QPainterPath &path,
const QPen &pen, const QBrush& brush )
{
QwtGraphic graphic;
graphic.setRenderHint( QwtGraphic::RenderPensUnscaled );
QPainter painter( &graphic );
painter.setPen( pen );
painter.setBrush( brush );
painter.drawPath( path );
painter.end();
return graphic;
}
/*!
\return Icon for the legend
In case of Tube style() the icon is a plain rectangle filled with the brush().
If a symbol is assigned it is scaled to size.
\param index Index of the legend entry
( ignored as there is only one )
\param size Icon size
\sa QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()
*/
QwtGraphic QwtPlotIntervalCurve::legendIcon(
int index, const QSizeF &size ) const
{
Q_UNUSED( index );
if ( size.isEmpty() )
return QwtGraphic();
QwtGraphic icon;
icon.setDefaultSize( size );
icon.setRenderHint( QwtGraphic::RenderPensUnscaled, true );
QPainter painter( &icon );
painter.setRenderHint( QPainter::Antialiasing,
testRenderHint( QwtPlotItem::RenderAntialiased ) );
if ( d_data->style == Tube )
{
QRectF r( 0, 0, size.width(), size.height() );
painter.fillRect( r, d_data->brush );
}
if ( d_data->symbol &&
( d_data->symbol->style() != QwtIntervalSymbol::NoSymbol ) )
{
QPen pen = d_data->symbol->pen();
pen.setWidthF( pen.widthF() );
pen.setCapStyle( Qt::FlatCap );
painter.setPen( pen );
painter.setBrush( d_data->symbol->brush() );
if ( orientation() == Qt::Vertical )
{
const double x = 0.5 * size.width();
d_data->symbol->draw( &painter, orientation(),
QPointF( x, 0 ), QPointF( x, size.height() - 1.0 ) );
}
else
{
const double y = 0.5 * size.height();
d_data->symbol->draw( &painter, orientation(),
QPointF( 0.0, y ), QPointF( size.width() - 1.0, y ) );
}
}
return icon;
}
/*!
\return Icon representing the marker on the legend
\param index Index of the legend entry
( usually there is only one )
\param size Icon size
\sa setLegendIconSize(), legendData()
*/
QwtGraphic QwtPlotMarker::legendIcon( int index,
const QSizeF &size ) const
{
Q_UNUSED( index );
if ( size.isEmpty() )
return QwtGraphic();
QwtGraphic icon;
icon.setDefaultSize( size );
icon.setRenderHint( QwtGraphic::RenderPensUnscaled, true );
QPainter painter( &icon );
painter.setRenderHint( QPainter::Antialiasing,
testRenderHint( QwtPlotItem::RenderAntialiased ) );
if ( d_data->style != QwtPlotMarker::NoLine )
{
painter.setPen( d_data->pen );
if ( d_data->style == QwtPlotMarker::HLine ||
d_data->style == QwtPlotMarker::Cross )
{
const double y = 0.5 * size.height();
QwtPainter::drawLine( &painter,
0.0, y, size.width(), y );
}
if ( d_data->style == QwtPlotMarker::VLine ||
d_data->style == QwtPlotMarker::Cross )
{
const double x = 0.5 * size.width();
QwtPainter::drawLine( &painter,
x, 0.0, x, size.height() );
}
}
if ( d_data->symbol )
{
const QRect r( 0.0, 0.0, size.width(), size.height() );
d_data->symbol->drawSymbol( &painter, r );
}
return icon;
}
/*!
\return Icon for representing a bar on the legend
\param index Index of the bar
\param size Icon size
\return An icon showing a bar
\sa drawBar(), legendData()
*/
QwtGraphic QwtPlotMultiBarChart::legendIcon( int index,
const QSizeF &size ) const
{
QwtColumnRect column;
column.hInterval = QwtInterval( 0.0, size.width() - 1.0 );
column.vInterval = QwtInterval( 0.0, size.height() - 1.0 );
QwtGraphic icon;
icon.setDefaultSize( size );
icon.setRenderHint( QwtGraphic::RenderPensUnscaled, true );
QPainter painter( &icon );
painter.setRenderHint( QPainter::Antialiasing,
testRenderHint( QwtPlotItem::RenderAntialiased ) );
drawBar( &painter, -1, index, column );
return icon;
}
QwtGraphic Plot2DProfile::legendIcon( int /*index*/, const QSizeF& iconSize ) const {
if ( iconSize.isEmpty() ){
return QwtGraphic();
}
QwtGraphic icon;
icon.setDefaultSize( iconSize );
icon.setRenderHint( QwtGraphic::RenderPensUnscaled, true );
QPainter painter( &icon );
QPen pen( m_defaultColor );
pen.setStyle( m_penStyle );
pen.setWidth( 3 );
const double y = 0.5 * iconSize.height();
QPainterPath path;
path.moveTo( 0.0, y );
path.lineTo( iconSize.width(), y );
painter.strokePath( path, pen );
return icon;
}
/*!
\return Icon representing a bar or the chart on the legend
When the legendMode() is LegendBarTitles the icon shows
the bar corresponding to index - otherwise the bar
displays the default symbol.
\param index Index of the legend entry
\param size Icon size
\sa setLegendMode(), drawBar(),
QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()
*/
QwtGraphic QwtPlotBarChart::legendIcon(
int index, const QSizeF &size ) const
{
QwtColumnRect column;
column.hInterval = QwtInterval( 0.0, size.width() - 1.0 );
column.vInterval = QwtInterval( 0.0, size.height() - 1.0 );
QwtGraphic icon;
icon.setDefaultSize( size );
icon.setRenderHint( QwtGraphic::RenderPensUnscaled, true );
QPainter painter( &icon );
painter.setRenderHint( QPainter::Antialiasing,
testRenderHint( QwtPlotItem::RenderAntialiased ) );
int barIndex = -1;
if ( d_data->legendMode == QwtPlotBarChart::LegendBarTitles )
barIndex = index;
drawBar( &painter, barIndex, QPointF(), column );
return icon;
}
/*!
\return Icon representing the curve on the legend
\param index Index of the legend entry
( ignored as there is only one )
\param size Icon size
\sa QwtPlotItem::setLegendIconSize(), QwtPlotItem::legendData()
*/
QwtGraphic QwtPlotCurve::legendIcon( int index,
const QSizeF &size ) const
{
Q_UNUSED( index );
if ( size.isEmpty() )
return QwtGraphic();
QwtGraphic graphic;
graphic.setDefaultSize( size );
graphic.setRenderHint( QwtGraphic::RenderPensUnscaled, true );
QPainter painter( &graphic );
painter.setRenderHint( QPainter::Antialiasing,
testRenderHint( QwtPlotItem::RenderAntialiased ) );
if ( d_data->legendAttributes == 0 ||
d_data->legendAttributes & QwtPlotCurve::LegendShowBrush )
{
QBrush brush = d_data->brush;
if ( brush.style() == Qt::NoBrush &&
d_data->legendAttributes == 0 )
{
if ( style() != QwtPlotCurve::NoCurve )
{
brush = QBrush( pen().color() );
}
else if ( d_data->symbol &&
( d_data->symbol->style() != QwtSymbol::NoSymbol ) )
{
brush = QBrush( d_data->symbol->pen().color() );
}
}
if ( brush.style() != Qt::NoBrush )
{
QRectF r( 0, 0, size.width(), size.height() );
painter.fillRect( r, brush );
}
}
if ( d_data->legendAttributes & QwtPlotCurve::LegendShowLine )
{
if ( pen() != Qt::NoPen )
{
QPen pn = pen();
pn.setCapStyle( Qt::FlatCap );
painter.setPen( pn );
const double y = 0.5 * size.height();
QwtPainter::drawLine( &painter, 0.0, y, size.width(), y );
}
}
if ( d_data->legendAttributes & QwtPlotCurve::LegendShowSymbol )
{
if ( d_data->symbol )
{
QRectF r( 0, 0, size.width(), size.height() );
d_data->symbol->drawSymbol( &painter, r );
}
}
return graphic;
}
MySymbol( QwtSymbol::Style style, const QBrush &brush )
{
QPen pen( Qt::black, 0 );
pen.setJoinStyle( Qt::MiterJoin );
pen.setCosmetic( true );
QPainterPath path = createArrow( QSize( 16, 24 ) );
const QSizeF pathSize = path.boundingRect().size();
setSize( 0.8 * pathSize.toSize() );
setPinPoint( QPointF( 0.0, 0.0 ) );
switch( style )
{
case QwtSymbol::Pixmap:
{
const QSize sz = size();
const double ratio = qMin( sz.width() / pathSize.width(),
sz.height() / pathSize.height() );
QTransform transform;
transform.scale( ratio, ratio );
path = transform.map( path );
if ( isPinPointEnabled() )
{
QPointF pos = transform.map( pinPoint() );
setPinPoint( pos );
}
const QRectF br = path.boundingRect();
int m = 2 + qCeil( pen.widthF() );
QPixmap pm( sz + QSize( 2 * m, 2 * m ) );
pm.fill( Qt::transparent );
QPainter painter( &pm );
painter.setRenderHint( QPainter::Antialiasing, true );
painter.setPen( pen );
painter.setBrush( brush );
painter.translate( m, m );
painter.translate( -br.left(), br.top() );
painter.drawPath( path );
setPixmap( pm );
setSize( pm.size() );
if ( isPinPointEnabled() )
setPinPoint( pinPoint() + QPointF( m, m ) );
break;
}
case QwtSymbol::Graphic:
{
QwtGraphic graphic;
graphic.setRenderHint( QwtGraphic::RenderPensUnscaled );
QPainter painter( &graphic );
painter.setRenderHint( QPainter::Antialiasing, true );
painter.setPen( pen );
painter.setBrush( brush );
painter.drawPath( path );
painter.end();
setGraphic( graphic );
break;
}
case QwtSymbol::SvgDocument:
{
QBuffer buf;
QSvgGenerator generator;
generator.setOutputDevice( &buf );
QPainter painter( &generator );
painter.setRenderHint( QPainter::Antialiasing, true );
painter.setPen( pen );
painter.setBrush( brush );
painter.drawPath( path );
painter.end();
setSvgDocument( buf.data() );
break;
}
case QwtSymbol::Path:
default:
{
setPen( pen );
setBrush( brush );
setPath( path );
}
}
}
