//! Wrapper for QPainter::fillRect()
void QwtPainter::fillRect( QPainter *painter,
const QRectF &rect, const QBrush &brush )
{
if ( !rect.isValid() )
return;
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
/*
Performance of Qt4 is horrible for a non trivial brush. Without
clipping expect minutes or hours for repainting large rectangles
(might result from zooming)
*/
if ( deviceClipping )
clipRect &= painter->window();
else
clipRect = painter->window();
if ( painter->hasClipping() )
clipRect &= painter->clipRegion().boundingRect();
QRectF r = rect;
if ( deviceClipping )
r = r.intersected( clipRect );
if ( r.isValid() )
painter->fillRect( r, brush );
}
//! Wrapper for QPainter::drawPoints()
void QwtPainter::drawPoints( QPainter *painter,
const QPoint *points, int pointCount )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping )
{
const int minX = qCeil( clipRect.left() );
const int maxX = qFloor( clipRect.right() );
const int minY = qCeil( clipRect.top() );
const int maxY = qFloor( clipRect.bottom() );
const QRect r( minX, minY, maxX - minX, maxY - minY );
QPolygon clippedPolygon( pointCount );
QPoint *clippedData = clippedPolygon.data();
int numClippedPoints = 0;
for ( int i = 0; i < pointCount; i++ )
{
if ( r.contains( points[i] ) )
clippedData[ numClippedPoints++ ] = points[i];
}
painter->drawPoints( clippedData, numClippedPoints );
}
else
{
painter->drawPoints( points, pointCount );
}
}
//! Wrapper for QPainter::drawRect()
void QwtPainter::drawRect( QPainter *painter, const QRectF &rect )
{
const QRectF r = rect;
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping )
{
if ( !clipRect.intersects( r ) )
return;
if ( !clipRect.contains( r ) )
{
fillRect( painter, r & clipRect, painter->brush() );
painter->save();
painter->setBrush( Qt::NoBrush );
drawPolyline( painter, QPolygonF( r ) );
painter->restore();
return;
}
}
painter->drawRect( r );
}
//! Wrapper for QPainter::drawPoint()
void QwtPainter::drawPoint( QPainter *painter, const QPointF &pos )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping && !clipRect.contains( pos ) )
return;
painter->drawPoint( pos );
}
//! Wrapper for QPainter::drawEllipse()
void QwtPainter::drawEllipse( QPainter *painter, const QRectF &rect )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping && !clipRect.contains( rect ) )
return;
painter->drawEllipse( rect );
}
//! Wrapper for QPainter::drawPolygon()
void QwtPainter::drawPolygon( QPainter *painter, const QPolygon &polygon )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
QPolygon cpa = polygon;
if ( deviceClipping )
cpa = QwtClipper::clipPolygon( clipRect, polygon );
painter->drawPolygon( cpa );
}
//! Wrapper for QPainter::drawPolyline()
void QwtPainter::drawPolyline( QPainter *painter, const QPolygon &polygon )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
QPolygon cpa = polygon;
if ( deviceClipping )
cpa = QwtClipper::clipPolygon( clipRect, cpa );
qwtDrawPolyline<QPoint>( painter,
cpa.constData(), cpa.size(), d_polylineSplitting );
}
//! Wrapper for QPainter::drawText()
void QwtPainter::drawText( QPainter *painter, const QPointF &pos,
const QString &text )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping && !clipRect.contains( pos ) )
return;
painter->save();
qwtUnscaleFont( painter );
painter->drawText( pos, text );
painter->restore();
}
//! Wrapper for QPainter::drawLine()
void QwtPainter::drawLine( QPainter *painter, const QPointF &p1, const QPointF &p2 )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping &&
!( clipRect.contains( p1 ) && clipRect.contains( p2 ) ) )
{
QPolygonF polygon;
polygon += p1;
polygon += p2;
drawPolyline( painter, polygon );
return;
}
painter->drawLine( p1, p2 );
}
//! Wrapper for QPainter::drawPolyline()
void QwtPainter::drawPolyline( QPainter *painter,
const QPoint *points, int pointCount )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping )
{
QPolygon polygon( pointCount );
::memcpy( polygon.data(), points, pointCount * sizeof( QPoint ) );
polygon = QwtClipper::clipPolygon( clipRect, polygon );
qwtDrawPolyline<QPoint>( painter,
polygon.constData(), polygon.size(), d_polylineSplitting );
}
else
qwtDrawPolyline<QPoint>( painter, points, pointCount, d_polylineSplitting );
}
//! Wrapper for QPainter::drawPoint()
void QwtPainter::drawPoint( QPainter *painter, const QPoint &pos )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping )
{
const int minX = qCeil( clipRect.left() );
const int maxX = qFloor( clipRect.right() );
const int minY = qCeil( clipRect.top() );
const int maxY = qFloor( clipRect.bottom() );
if ( pos.x() < minX || pos.x() > maxX
|| pos.y() < minY || pos.y() > maxY )
{
return;
}
}
painter->drawPoint( pos );
}
//! Wrapper for QPainter::drawPoints()
void QwtPainter::drawPoints( QPainter *painter,
const QPointF *points, int pointCount )
{
QRectF clipRect;
const bool deviceClipping = qwtIsClippingNeeded( painter, clipRect );
if ( deviceClipping )
{
QPolygonF clippedPolygon( pointCount );
QPointF *clippedData = clippedPolygon.data();
int numClippedPoints = 0;
for ( int i = 0; i < pointCount; i++ )
{
if ( clipRect.contains( points[i] ) )
clippedData[ numClippedPoints++ ] = points[i];
}
painter->drawPoints( clippedData, numClippedPoints );
}
else
{
painter->drawPoints( points, pointCount );
}
}