void TernaryAxis::updatePrerenderedLabels()
{
TextAttributes attributes = titleTextAttributes();
double axisLabelAngle = 0.0;
double fiftyMarkAngle = 0.0;
QPointF axisLabelPosition;
QPointF fiftyMarkPosition;
KDChartEnums::PositionValue fiftyMarkReferencePoint = KDChartEnums::PositionUnknown;
switch( position().value() ) {
case KDChartEnums::PositionSouth:
// this is the axis on the other side of A
axisLabelAngle = 0.0;
fiftyMarkAngle = 0.0;
axisLabelPosition = TriangleTop;
fiftyMarkPosition = 0.5 * AxisVector_B_C - RelMarkerLength * Norm_B_C;
fiftyMarkReferencePoint = KDChartEnums::PositionNorth;
break;
case KDChartEnums::PositionEast:
// this is the axis on the other side of B
axisLabelAngle = 240.0;
fiftyMarkAngle = 60;
axisLabelPosition = TriangleBottomLeft;
fiftyMarkPosition = AxisVector_B_C + 0.5 * AxisVector_C_A - RelMarkerLength * Norm_C_A;
fiftyMarkReferencePoint = KDChartEnums::PositionSouth;
break;
case KDChartEnums::PositionWest:
// this is the axis on the other side of C
axisLabelAngle = 120.0;
fiftyMarkAngle = 300.0;
axisLabelPosition = TriangleBottomRight;
fiftyMarkPosition = 0.5 * AxisVector_B_A + RelMarkerLength * Norm_B_A;
fiftyMarkReferencePoint = KDChartEnums::PositionSouth;
break;
case KDChartEnums::PositionUnknown:
break; // initial value
default:
qDebug() << "TernaryAxis::updatePrerenderedLabel: unknown location";
};
m_label->setFont( attributes.font() );
// m_label->setText( titleText() ); // done by setTitleText()
m_label->setAngle( axisLabelAngle );
m_label->setPosition( axisLabelPosition );
m_label->setReferencePoint( KDChartEnums::PositionSouth );
QFont font = attributes.font();
font.setPointSizeF( 0.85 * font.pointSizeF() );
m_fifty->setFont( font );
m_fifty->setAngle( fiftyMarkAngle );
m_fifty->setPosition( fiftyMarkPosition );
m_fifty->setReferencePoint( fiftyMarkReferencePoint );
}
/**
\brief Use this to specify the text attributes to be used for this item.
\sa textAttributes
*/
void KDChart::TextLayoutItem::setTextAttributes( const TextAttributes &a )
{
mAttributes = a;
cachedFont = a.font();
cachedSizeHint = QSize(); // invalidate size hint
sizeHint();
if( mParent )
mParent->update();
}
bool TextAttributes::operator==( const TextAttributes& r ) const
{
// the following works around a bug in gcc 4.3.2
// causing StyleHint to be set to Zero when copying a QFont
const QFont myFont( font() );
QFont r_font( r.font() );
r_font.setStyleHint( myFont.styleHint(), myFont.styleStrategy() );
return ( isVisible() == r.isVisible() &&
myFont == r_font &&
fontSize() == r.fontSize() &&
minimalFontSize() == r.minimalFontSize() &&
autoRotate() == r.autoRotate() &&
autoShrink() == r.autoShrink() &&
rotation() == r.rotation() &&
pen() == r.pen() &&
textDocument() == r.textDocument() );
}
void RadarDiagram::paint( PaintContext* ctx,
bool calculateListAndReturnScale,
qreal& newZoomX, qreal& newZoomY )
{
// note: Not having any data model assigned is no bug
// but we can not draw a diagram then either.
if ( !checkInvariants(true) )
return;
d->reverseMapper.clear();
const int rowCount = model()->rowCount( rootIndex() );
const int colCount = model()->columnCount( rootIndex() );
int iRow, iCol;
const qreal min = dataBoundaries().first.y();
const qreal r = qAbs( min ) + dataBoundaries().second.y();
const qreal step = ( r - qAbs( min ) ) / ( numberOfGridRings() );
RadarCoordinatePlane* plane = dynamic_cast<RadarCoordinatePlane*>(ctx->coordinatePlane());
TextAttributes ta = plane->textAttributes();
QRectF fontRect = ctx->rectangle();
fontRect.setSize( QSizeF( fontRect.width(), step / 2.0 ) );
const qreal labelFontSize = fitFontSizeToGeometry( QString::fromLatin1( "TestXYWQgqy" ), ta.font(), fontRect, ta );
QFont labelFont = ta.font();
ctx->painter()->setPen( ta.pen() );
labelFont.setPointSizeF( labelFontSize );
const QFontMetricsF metric( labelFont );
const qreal labelHeight = metric.height();
QPointF offset;
QRectF destRect = ctx->rectangle();
if ( ta.isVisible() )
{
destRect.setY( destRect.y() + 2 * labelHeight );
destRect.setHeight( destRect.height() - 4 * labelHeight );
}
if ( calculateListAndReturnScale ) {
ctx->painter()->save();
// Check if all of the data value texts / data comments will fit
// into the available space:
d->labelPaintCache.clear();
ctx->painter()->save();
for ( iCol=0; iCol < colCount; ++iCol ) {
for ( iRow=0; iRow < rowCount; ++iRow ) {
QModelIndex index = model()->index( iRow, iCol, rootIndex() ); // checked
const qreal value = model()->data( index ).toReal();
QPointF point = scaleToRealPosition( QPointF( value, iRow ), ctx->rectangle(), destRect, *ctx->coordinatePlane() );
d->addLabel( &d->labelPaintCache, index, 0, PositionPoints( point ),
Position::Center, Position::Center, value );
}
}
ctx->painter()->restore();
const qreal oldZoomX = coordinatePlane()->zoomFactorX();
const qreal oldZoomY = coordinatePlane()->zoomFactorY();
newZoomX = oldZoomX;
newZoomY = oldZoomY;
if ( d->labelPaintCache.paintReplay.count() ) {
QRectF txtRectF;
d->paintDataValueTextsAndMarkers( ctx, d->labelPaintCache, true, true, &txtRectF );
const QRect txtRect = txtRectF.toRect();
const QRect curRect = coordinatePlane()->geometry();
const qreal gapX = qMin( txtRect.left() - curRect.left(), curRect.right() - txtRect.right() );
const qreal gapY = qMin( txtRect.top() - curRect.top(), curRect.bottom() - txtRect.bottom() );
newZoomX = oldZoomX;
newZoomY = oldZoomY;
if ( gapX < 0.0 )
newZoomX *= 1.0 + (gapX-1.0) / curRect.width();
if ( gapY < 0.0 )
newZoomY *= 1.0 + (gapY-1.0) / curRect.height();
}
ctx->painter()->restore();
} else {
// Iterate through data sets and create a list of polygons out of them.
QList<Polygon> polygons;
for ( iCol=0; iCol < colCount; ++iCol ) {
//TODO(khz): As of yet RadarDiagram can not show per-segment line attributes
// but it draws every polyline in one go - using one color.
// This needs to be enhanced to allow for cell-specific settings
// in the same way as LineDiagram does it.
QPolygonF polygon;
QPointF point0;
for ( iRow=0; iRow < rowCount; ++iRow ) {
QModelIndex index = model()->index( iRow, iCol, rootIndex() ); // checked
const qreal value = model()->data( index ).toReal();
QPointF point = scaleToRealPosition( QPointF( value, d->reverseData ? ( rowCount - iRow ) : iRow ), ctx->rectangle(), destRect, *ctx->coordinatePlane() );
polygon.append( point );
if ( ! iRow )
point0= point;
}
if ( closeDatasets() && rowCount )
polygon.append( point0 );
QBrush brush = d->datasetAttrs( iCol, KChart::DatasetBrushRole ).value<QBrush>();
QPen p = d->datasetAttrs( iCol, KChart::DatasetPenRole ).value< QPen >();
if ( p.style() != Qt::NoPen )
{
polygons.append( Polygon( polygon, brush, PrintingParameters::scalePen( p ) ) );
}
}
// first fill the areas with the brush-color and the defined alpha-value.
if (d->fillAlpha > 0.0) {
Q_FOREACH(const Polygon& p, polygons) {
PainterSaver painterSaver( ctx->painter() );
ctx->painter()->setRenderHint ( QPainter::Antialiasing );
QBrush br = p.brush;
QColor c = br.color();
c.setAlphaF(d->fillAlpha);
br.setColor(c);
ctx->painter()->setBrush( br );
ctx->painter()->setPen( p.pen );
ctx->painter()->drawPolygon( p.polygon );
}
}