QRegion::QRegion( const QRect &r, RegionType t )
{
QRect rr = r.normalize();
data = new QRegionData;
CHECK_PTR( data );
data->is_null = FALSE;
if ( t == Rectangle ) { // rectangular region
data->rgn = XCreateRegion();
XRectangle xr;
xr.x = rr.x();
xr.y = rr.y();
xr.width = rr.width();
xr.height = rr.height();
XUnionRectWithRegion( &xr, data->rgn, data->rgn );
} else if ( t == Ellipse ) { // elliptic region
QPointArray a;
a.makeEllipse( rr.x(), rr.y(), rr.width(), rr.height() );
data->rgn = XPolygonRegion( (XPoint*)a.data(), a.size(), EvenOddRule );
}
}
/**
Internal method that draws one of the pies in a pie chart.
\param painter the QPainter to draw in
\param dataset the dataset to draw the pie for
\param pie the pie to draw
\param the chart to draw the pie in
\param regions a pointer to a list of regions that will be filled
with regions representing the data segments, if not null
*/
void KDChartPiePainter::drawOnePie( QPainter* painter,
KDChartTableDataBase* /*data*/,
uint dataset, uint pie, uint chart,
uint threeDPieHeight,
KDChartDataRegionList* regions )
{
// Is there anything to draw at all?
int angleLen = _angleLens[ ( int ) pie ];
if ( angleLen ) {
int startAngle = _startAngles[ ( int ) pie ];
KDChartDataRegion* datReg = 0;
QRegion* region = 0;
bool mustDeleteRegion = false;
if ( regions ){
region = new QRegion();
mustDeleteRegion = true;
}
QRect drawPosition = _position;
if ( params()->explode() ) {
// need to compute a new position for each or some of the pie
QValueList<int> explodeList = params()->explodeValues();
if( explodeList.count() == 0 || // nothing on list, explode all
explodeList.find( pie ) != explodeList.end() ) {
double explodeAngle = ( startAngle + angleLen / 2 ) / 16;
double explodeAngleRad = DEGTORAD( explodeAngle );
double cosAngle = cos( explodeAngleRad );
double sinAngle = -sin( explodeAngleRad );
// find the explode factor for this particular pie
double explodeFactor = 0.0;
QMap<int,double> explodeFactors = params()->explodeFactors();
if( !explodeFactors.contains( pie ) ) // not on factors list, use default
explodeFactor = params()->explodeFactor();
else // on factors list, use segment-specific value
explodeFactor = explodeFactors[pie];
double explodeX = explodeFactor * _size * cosAngle;
double explodeY = explodeFactor * _size * sinAngle;
drawPosition.moveBy( static_cast<int>( explodeX ), static_cast<int>( explodeY ) );
} else
drawPosition = _position;
} else
drawPosition = _position;
// The 3D effect needs to be drawn first because it could
// otherwise partly hide the pie itself.
if ( params()->threeDPies() ) {
draw3DEffect( painter, drawPosition, dataset, pie, chart,
threeDPieHeight,
params()->explode(), region );
}
painter->setBrush( params()->dataColor( pie ) );
if ( angleLen == 5760 ) {
// full circle, avoid nasty line in the middle
painter->drawEllipse( drawPosition );
if ( regions ) {
QPointArray hitregion;
hitregion.makeEllipse( drawPosition.x(), drawPosition.y(),
drawPosition.width(),
drawPosition.height() );
datReg = new KDChartDataRegion( region->unite( QRegion( hitregion ) ),
dataset,
pie,
chart );
datReg->points[ KDChartEnums::PosCenter ]
= drawPosition.center();
datReg->points[ KDChartEnums::PosCenterRight ]
= pointOnCircle( drawPosition, 0 );
datReg->points[ KDChartEnums::PosTopRight ]
= pointOnCircle( drawPosition, 720 );
datReg->points[ KDChartEnums::PosTopCenter ]
= pointOnCircle( drawPosition, 1440 );
datReg->points[ KDChartEnums::PosTopLeft ]
= pointOnCircle( drawPosition, 2160 );
datReg->points[ KDChartEnums::PosCenterLeft ]
= pointOnCircle( drawPosition, 2880 );
datReg->points[ KDChartEnums::PosBottomLeft ]
= pointOnCircle( drawPosition, 3600 );
datReg->points[ KDChartEnums::PosBottomCenter ]
= pointOnCircle( drawPosition, 4320 );
datReg->points[ KDChartEnums::PosBottomRight ]
= pointOnCircle( drawPosition, 5040 );
datReg->startAngle = 2880;
datReg->angleLen = 5760;
regions->append( datReg );
}
} else {
// draw the top of this piece
// Start with getting the points for the arc.
const int arcPoints = angleLen;
QPointArray collect(arcPoints+2);
int i=0;
for ( ; i<=angleLen; ++i){
collect.setPoint(i, pointOnCircle( drawPosition, startAngle+i ));
}
// Adding the center point of the piece.
collect.setPoint(i, drawPosition.center() );
painter->drawPolygon( collect );
//if( bHelp ){
// painter->drawPolyline( collect );
//bHelp=false;
//}
if ( regions ) {
QPointArray hitregion;
hitregion.makeArc( drawPosition.x(), drawPosition.y(),
drawPosition.width(),
drawPosition.height(),
( int ) startAngle, ( int ) angleLen );
hitregion.resize( hitregion.size() + 1 );
hitregion.setPoint( hitregion.size() - 1,
drawPosition.center() );
datReg = new KDChartDataRegion( region->unite( QRegion( hitregion ) ),
dataset,
pie,
chart );
datReg->points[ KDChartEnums::PosTopLeft ]
= pointOnCircle( drawPosition, startAngle + angleLen );
datReg->points[ KDChartEnums::PosTopCenter ]
= pointOnCircle( drawPosition, startAngle + angleLen / 2 );
datReg->points[ KDChartEnums::PosTopRight ]
= pointOnCircle( drawPosition, startAngle );
datReg->points[ KDChartEnums::PosBottomLeft ] = drawPosition.center();
datReg->points[ KDChartEnums::PosBottomCenter ]
= datReg->points[ KDChartEnums::PosBottomLeft ];
datReg->points[ KDChartEnums::PosBottomRight ]
= datReg->points[ KDChartEnums::PosBottomLeft ];
datReg->points[ KDChartEnums::PosCenterLeft ]
= QPoint( ( datReg->points[ KDChartEnums::PosTopLeft ].x()
+ datReg->points[ KDChartEnums::PosBottomLeft ].x() ) / 2,
( datReg->points[ KDChartEnums::PosTopLeft ].y()
+ datReg->points[ KDChartEnums::PosBottomLeft ].y() ) / 2 );
datReg->points[ KDChartEnums::PosCenter ]
= QPoint( ( datReg->points[ KDChartEnums::PosTopCenter ].x()
+ datReg->points[ KDChartEnums::PosBottomCenter ].x() ) / 2,
( datReg->points[ KDChartEnums::PosTopCenter ].y()
+ datReg->points[ KDChartEnums::PosBottomCenter ].y() ) / 2 );
datReg->points[ KDChartEnums::PosCenterRight ]
= QPoint( ( datReg->points[ KDChartEnums::PosTopRight ].x()
+ datReg->points[ KDChartEnums::PosBottomRight ].x() ) / 2,
( datReg->points[ KDChartEnums::PosTopRight ].y()
+ datReg->points[ KDChartEnums::PosBottomRight ].y() ) / 2 );
datReg->startAngle = startAngle;
datReg->angleLen = angleLen;
regions->append( datReg );
}
}
if( mustDeleteRegion )
delete region;
}
}
