void PieDiagram::shuffleLabels( QRectF* textBoundingRect )
{
// things that could be improved here:
// - use a variable number (chosen using angle information) of neighbors to check
// - try harder to arrange the labels to look nice
// ideas:
// - leave labels that don't collide alone (only if they their offset is zero)
// - use a graphics view for collision detection
LabelPaintCache& lpc = d->labelPaintCache;
const int n = lpc.paintReplay.size();
bool modified = false;
qreal direction = 5.0;
QVector< qreal > offsets;
offsets.fill( 0.0, n );
for ( bool lastRoundModified = true; lastRoundModified; ) {
lastRoundModified = false;
for ( int i = 0; i < n; i++ ) {
const int neighborsToCheck = qMax( 10, lpc.paintReplay.size() - 1 );
const int minComp = wraparound( i - neighborsToCheck / 2, n );
const int maxComp = wraparound( i + ( neighborsToCheck + 1 ) / 2, n );
QPainterPath& path = lpc.paintReplay[ i ].labelArea;
for ( int j = minComp; j != maxComp; j = wraparound( j + 1, n ) ) {
if ( i == j ) {
continue;
}
QPainterPath& otherPath = lpc.paintReplay[ j ].labelArea;
while ( ( offsets[ i ] + direction > 0 ) && otherPath.intersects( path ) ) {
#ifdef SHUFFLE_DEBUG
qDebug() << "collision involving" << j << "and" << i << " -- n =" << n;
TextAttributes ta = lpc.paintReplay[ i ].attrs.textAttributes();
ta.setPen( QPen( Qt::white ) );
lpc.paintReplay[ i ].attrs.setTextAttributes( ta );
#endif
uint slice = lpc.paintReplay[ i ].index.column();
qreal angle = DEGTORAD( d->startAngles[ slice ] + d->angleLens[ slice ] / 2.0 );
qreal dx = cos( angle ) * direction;
qreal dy = -sin( angle ) * direction;
offsets[ i ] += direction;
path.translate( dx, dy );
lastRoundModified = true;
}
}
}
direction *= -1.07; // this can "overshoot", but avoids getting trapped in local minimums
modified = modified || lastRoundModified;
}
if ( modified ) {
for ( int i = 0; i < lpc.paintReplay.size(); i++ ) {
*textBoundingRect |= lpc.paintReplay[ i ].labelArea.boundingRect();
}
}
}
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 );
}
static qreal fitFontSizeToGeometry( const QString& text, const QFont& font, const QRectF& geometry, const TextAttributes& ta )
{
QFont f = font;
const qreal origResult = f.pointSizeF();
qreal result = origResult;
const QSizeF mySize = geometry.size();
if ( mySize.isNull() )
return result;
const QString t = text;
QFontMetrics fm( f );
while ( true )
{
const QSizeF textSize = rotatedRect( fm.boundingRect( t ), ta.rotation() ).normalized().size();
if ( textSize.height() <= mySize.height() && textSize.width() <= mySize.width() )
return result;
result -= 0.5;
if ( result <= 0.0 )
return origResult;
f.setPointSizeF( result );
fm = QFontMetrics( f );
}
}
void MainWindow::on_paintValuesCB_toggled( bool checked )
{
const int colCount = m_lines->model()->columnCount();
for ( int iColumn = 0; iColumn<colCount; ++iColumn ) {
DataValueAttributes a = m_lines->dataValueAttributes( iColumn );
a.setVisible( true );
TextAttributes ta = a.textAttributes();
ta.setRotation( 0 );
ta.setFont( QFont( "Comic", 10 ) );
ta.setPen( m_lines->brush( iColumn ).color() );
ta.setVisible( checked );
a.setTextAttributes( ta );
m_lines->setDataValueAttributes( iColumn, a);
}
}
/**
\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();
}
MainWindow::MainWindow( QWidget *parent )
: QWidget( parent )
, m_chart( new Chart() )
, m_diagram( m_chart )
{
setupUi( this );
m_HLCModel.loadFromCSV( ":/HLC" );
m_OHLCModel.loadFromCSV( ":/OHLC" );
m_diagram.setType( StockDiagram::HighLowClose );
m_diagram.setModel( &m_HLCModel );
m_chart->coordinatePlane()->replaceDiagram( &m_diagram );
KDChart::Legend* legend = new KDChart::Legend( &m_diagram, m_chart );
m_chart->addLegend( legend );
QHBoxLayout* chartLayout = new QHBoxLayout( chartFrame );
chartLayout->addWidget( m_chart );
// Abscissa
CartesianAxis *leftAxis = new CartesianAxis( &m_diagram );
// Ordinate
CartesianAxis *bottomAxis = new CartesianAxis( &m_diagram );
leftAxis->setPosition( CartesianAxis::Left );
TextAttributes attributes = bottomAxis->textAttributes();
attributes.setRotation( 90 );
attributes.setFontSize( Measure( 7.0, KDChartEnums::MeasureCalculationModeAbsolute ) );
bottomAxis->setTextAttributes( attributes );
bottomAxis->setPosition( CartesianAxis::Bottom );
m_diagram.addAxis( leftAxis );
m_diagram.addAxis( bottomAxis );
m_diagram.addAxis( bottomAxis );
applyColor( QColor( "chartreuse" ) );
const bool connected = connect( colorChooser, SIGNAL( clicked() ), SLOT( chooseColor() ) );
Q_ASSERT( connected );
Q_UNUSED( connected );
// Initialize all values for the stock chart to sane defaults
initValues();
}
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 markPeak(Plotter* p, const QModelIndex& peak, quint64 cost, const KColorScheme& scheme)
{
QBrush brush = p->model()->data(peak, DatasetBrushRole).value<QBrush>();
QColor outline = brush.color();
QColor foreground = scheme.foreground().color();
QBrush background = scheme.background();
DataValueAttributes dataAttributes = p->dataValueAttributes(peak);
dataAttributes.setDataLabel(prettyCost(cost));
dataAttributes.setVisible(true);
dataAttributes.setShowRepetitiveDataLabels(true);
dataAttributes.setShowOverlappingDataLabels(false);
FrameAttributes frameAttrs = dataAttributes.frameAttributes();
QPen framePen(outline);
framePen.setWidth(2);
frameAttrs.setPen(framePen);
frameAttrs.setVisible(true);
dataAttributes.setFrameAttributes(frameAttrs);
MarkerAttributes a = dataAttributes.markerAttributes();
a.setMarkerSize(QSizeF(7, 7));
a.setPen(outline);
a.setMarkerStyle(KChart::MarkerAttributes::MarkerDiamond);
a.setVisible(true);
dataAttributes.setMarkerAttributes(a);
TextAttributes txtAttrs = dataAttributes.textAttributes();
txtAttrs.setPen(foreground);
txtAttrs.setFontSize(Measure(12));
dataAttributes.setTextAttributes(txtAttrs);
BackgroundAttributes bkgAtt = dataAttributes.backgroundAttributes();
bkgAtt.setBrush(background);
bkgAtt.setVisible(true);
dataAttributes.setBackgroundAttributes(bkgAtt);
p->setDataValueAttributes(peak, dataAttributes);
}
AttributedString BaseTextShadowNode::getAttributedString(
const TextAttributes &textAttributes,
const SharedShadowNodeSharedList &childNodes
) const {
// TODO: Implement caching.
AttributedString attributedString;
for (auto &&childNode : *childNodes) {
// RawShadowNode
SharedRawTextShadowNode rawTextShadowNode = std::dynamic_pointer_cast<const RawTextShadowNode>(childNode);
if (rawTextShadowNode) {
AttributedString::Fragment fragment;
fragment.string = rawTextShadowNode->getProps()->text;
fragment.textAttributes = textAttributes;
attributedString.appendFragment(fragment);
continue;
}
// TextShadowNode
SharedTextShadowNode textShadowNode = std::dynamic_pointer_cast<const TextShadowNode>(childNode);
if (textShadowNode) {
TextAttributes localTextAttributes = textAttributes;
localTextAttributes.apply(textShadowNode->getProps()->textAttributes);
attributedString.appendAttributedString(textShadowNode->getAttributedString(localTextAttributes, textShadowNode->getChildren()));
continue;
}
// Any other kind of ShadowNode
AttributedString::Fragment fragment;
fragment.shadowNode = childNode;
fragment.textAttributes = textAttributes;
attributedString.appendFragment(fragment);
}
return attributedString;
}
MainWindow::MainWindow( QWidget* parent ) :
QWidget( parent )
{
setupUi( this );
QHBoxLayout* chartLayout = new QHBoxLayout( chartFrame );
m_chart = new Chart();
m_chart->setGlobalLeading( 10, 10, 10, 10 );
chartLayout->addWidget( m_chart );
hSBar->setVisible( false );
vSBar->setVisible( false );
m_model.loadFromCSV( ":/data" );
// Set up the diagram
m_lines = new BarDiagram();
m_lines->setModel( &m_model );
// create and position axis
CartesianAxis *topAxis = new CartesianAxis( m_lines );
CartesianAxis *leftAxis = new CartesianAxis ( m_lines );
RulerAttributes rulerAttr = topAxis->rulerAttributes();
rulerAttr.setTickMarkPen( 0.9999999, QPen( Qt::red ) );
rulerAttr.setTickMarkPen( 2.0, QPen( Qt::green ) );
rulerAttr.setTickMarkPen( 3.0, QPen( Qt::blue ) );
rulerAttr.setShowMinorTickMarks(true);
//rulerAttr.setShowMajorTickMarks(false);
topAxis->setRulerAttributes( rulerAttr );
CartesianAxis *rightAxis = new CartesianAxis ( m_lines );
CartesianAxis *bottomAxis = new CartesianAxis ( m_lines );
topAxis->setPosition ( CartesianAxis::Top );
leftAxis->setPosition ( CartesianAxis::Left );
rightAxis->setPosition ( CartesianAxis::Right );
bottomAxis->setPosition ( CartesianAxis::Bottom );
// set the margin that should be used between the displayed labels and the ticks to zero
#if 0
RulerAttributes ra = bottomAxis->rulerAttributes();
ra.setLabelMargin(0);
bottomAxis->setRulerAttributes( ra );
#endif
// show a red frame around the bottom axis
#if 0
FrameAttributes fa( bottomAxis->frameAttributes() );
fa.setPen( QPen(QBrush(QColor("#ff0000")),1.0) );
fa.setVisible( true );
bottomAxis->setFrameAttributes( fa );
#endif
// set axis titles
topAxis->setTitleText ( "Abscissa color configured top position" );
leftAxis->setTitleText ( "left Ordinate: fonts configured" );
rightAxis->setTitleText ( "right Ordinate: default settings" );
bottomAxis->setTitleText ( "Abscissa Bottom" );
topAxis->setTitleSize(1.1);
topAxis->setTitleSpace(.4);
// configure titles text attributes
TextAttributes taTop ( topAxis->titleTextAttributes () );
taTop.setPen( QPen( Qt::red ) );
topAxis->setTitleTextAttributes ( taTop );
TextAttributes taLeft ( leftAxis->titleTextAttributes () );
taLeft.setRotation( 180 );
Measure me( taLeft.fontSize() );
me.setValue( me.value() * 0.8 );
taLeft.setFontSize( me );
// Set the following to 1, to hide the left axis title
// - no matter if a title text is set or not
#if 0
taLeft.setVisible( false );
#endif
leftAxis->setTitleTextAttributes ( taLeft );
TextAttributes taBottom ( bottomAxis->titleTextAttributes () );
taBottom.setPen( QPen( Qt::blue ) );
bottomAxis->setTitleTextAttributes ( taBottom );
// configure labels text attributes
TextAttributes taLabels( topAxis->textAttributes() );
taLabels.setPen( QPen( Qt::darkGreen ) );
taLabels.setRotation( 90 );
topAxis->setTextAttributes( taLabels );
leftAxis->setTextAttributes( taLabels );
bottomAxis->setTextAttributes( taLabels );
// Set the following to 0, to see the default Abscissa labels
// (== X headers, as read from the data file)
#if 1
// configure labels and their shortened versions
QStringList daysOfWeek;
daysOfWeek << "M O N D A Y" << "Tuesday" << "Wednesday"
<< "Thursday" << "Friday" ;
topAxis->setLabels( daysOfWeek );
QStringList shortDays;
shortDays << "MON" << "Tue" << "Wed"
<< "Thu" << "Fri";
topAxis->setShortLabels( shortDays );
QStringList bottomLabels;
bottomLabels << "Team A" << "Team B" << "Team C";
bottomAxis->setLabels( bottomLabels );
QStringList shortBottomLabels;
shortBottomLabels << "A" << "B";
bottomAxis->setShortLabels( shortBottomLabels );
#endif
// add axis
m_lines->addAxis( topAxis );
m_lines->addAxis( leftAxis );
m_lines->addAxis( rightAxis );
m_lines->addAxis( bottomAxis );
// assign diagram to chart view
m_chart->coordinatePlane()->replaceDiagram( m_lines );
}
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 );
}
}
void AbstractDiagram::Private::addLabel(
LabelPaintCache* cache,
const QModelIndex& index,
const CartesianDiagramDataCompressor::CachePosition* position,
const PositionPoints& points,
const Position& autoPositionPositive, const Position& autoPositionNegative,
const qreal value, qreal favoriteAngle /* = 0.0 */ )
{
CartesianDiagramDataCompressor::AggregatedDataValueAttributes allAttrs(
aggregatedAttrs( index, position ) );
QMap<QModelIndex, DataValueAttributes>::const_iterator it;
for ( it = allAttrs.constBegin(); it != allAttrs.constEnd(); ++it ) {
DataValueAttributes dva = it.value();
if ( !dva.isVisible() ) {
continue;
}
const bool isPositive = ( value >= 0.0 );
RelativePosition relPos( dva.position( isPositive ) );
relPos.setReferencePoints( points );
if ( relPos.referencePosition().isUnknown() ) {
relPos.setReferencePosition( isPositive ? autoPositionPositive : autoPositionNegative );
}
// Rotate the label position (not the label itself) if the diagram is rotated so that the defaults still work
if ( isTransposed() ) {
KChartEnums::PositionValue posValue = relPos.referencePosition().value();
if ( posValue >= KChartEnums::PositionNorthWest && posValue <= KChartEnums::PositionWest ) {
// rotate 90 degrees clockwise
posValue = static_cast< KChartEnums::PositionValue >( posValue + 2 );
if ( posValue > KChartEnums::PositionWest ) {
// wraparound
posValue = static_cast< KChartEnums::PositionValue >( posValue -
( KChartEnums::PositionWest - KChartEnums::PositionNorthWest ) );
}
relPos.setReferencePosition( Position( posValue ) );
}
}
const QPointF referencePoint = relPos.referencePoint();
if ( !diagram->coordinatePlane()->isVisiblePoint( referencePoint ) ) {
continue;
}
const qreal fontHeight = cachedFontMetrics( dva.textAttributes().
calculatedFont( plane, KChartEnums::MeasureOrientationMinimum ), diagram )->height();
// Note: When printing data value texts and padding's Measure is using automatic reference area
// detection, the font height is used as reference size for both horizontal and vertical
// padding.
QSizeF relativeMeasureSize( fontHeight, fontHeight );
if ( !dva.textAttributes().hasRotation() ) {
TextAttributes ta = dva.textAttributes();
ta.setRotation( favoriteAngle );
dva.setTextAttributes( ta );
}
// get the size of the label text using a subset of the information going into the final layout
const QString text = formatDataValueText( dva, index, value );
QTextDocument doc;
doc.setDocumentMargin( 0 );
if ( Qt::mightBeRichText( text ) ) {
doc.setHtml( text );
} else {
doc.setPlainText( text );
}
const QFont calculatedFont( dva.textAttributes()
.calculatedFont( plane, KChartEnums::MeasureOrientationMinimum ) );
doc.setDefaultFont( calculatedFont );
const QRectF plainRect = doc.documentLayout()->frameBoundingRect( doc.rootFrame() );
/**
* A few hints on how the positioning of the text frame is done:
*
* Let's assume we have a bar chart, a text for a positive value
* to be drawn, and "North" as attrs.positivePosition().
*
* The reference point (pos) is then set to the top center point
* of a bar. The offset now depends on the alignment:
*
* Top: text is centered horizontally to the bar, bottom of
* text frame starts at top of bar
*
* Bottom: text is centered horizontally to the bar, top of
* text frame starts at top of bar
*
* Center: text is centered horizontally to the bar, center
* line of text frame is same as top of bar
*
* TopLeft: right edge of text frame is horizontal center of
* bar, bottom of text frame is top of bar.
*
* ...
*
* Positive and negative value labels are treated equally, "North"
* also refers to the top of a negative bar, and *not* to the bottom.
*
*
* "NorthEast" likewise refers to the top right edge of the bar,
* "NorthWest" to the top left edge of the bar, and so on.
*
* In other words, attrs.positivePosition() always refers to a
* position of the *bar*, and relPos.alignment() always refers
* to an alignment of the text frame relative to this position.
*/
QTransform transform;
{
// move to the general area where the label should be
QPointF calcPoint = relPos.calculatedPoint( relativeMeasureSize );
transform.translate( calcPoint.x(), calcPoint.y() );
// align the text rect; find out by how many half-widths / half-heights to move.
int dx = -1;
if ( relPos.alignment() & Qt::AlignLeft ) {
dx -= 1;
} else if ( relPos.alignment() & Qt::AlignRight ) {
dx += 1;
}
int dy = -1;
if ( relPos.alignment() & Qt::AlignTop ) {
dy -= 1;
} else if ( relPos.alignment() & Qt::AlignBottom ) {
dy += 1;
}
transform.translate( qreal( dx ) * plainRect.width() * 0.5,
qreal( dy ) * plainRect.height() * 0.5 );
// rotate the text rect around its center
transform.translate( plainRect.center().x(), plainRect.center().y() );
int rotation = dva.textAttributes().rotation();
if ( !isPositive && dva.mirrorNegativeValueTextRotation() ) {
rotation *= -1;
}
transform.rotate( rotation );
transform.translate( -plainRect.center().x(), -plainRect.center().y() );
}
QPainterPath labelArea;
//labelArea.addPolygon( transform.mapToPolygon( plainRect.toRect() ) );
//labelArea.closeSubpath();
// Not doing that because QTransform has a special case for 180° that gives a different than
// usual ordering of the points in the polygon returned by mapToPolygon( const QRect & ).
// We expect a particular ordering in paintDataValueTextsAndMarkers() by using elementAt( 0 ),
// and similar things might happen elsewhere.
labelArea.addPolygon( transform.map( QPolygon( plainRect.toRect(), true ) ) );
// store the label geometry and auxiliary data
cache->paintReplay.append( LabelPaintInfo( it.key(), dva, labelArea,
referencePoint, value >= 0.0, text ) );
}
}