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 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);
}
}
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);
}
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 );
}