void MainWindow::setHighlightArea( int row, int column, int opacity,
bool checked, bool doUpdate )
{
if ( row < 0 ) {
// highlight a complete dataset
LineAttributes la = m_lines->lineAttributes( column );
if ( checked ) {
la.setDisplayArea( true );
la.setTransparency( opacity );
} else {
la.setDisplayArea( false );
}
m_lines->setLineAttributes( column, la );
} else {
// highlight two segments only
if ( row ) {
QModelIndex cellIndex( m_lines->model()->index( row - 1, column,
m_lines->rootIndex() ) );
if ( checked ) {
LineAttributes la( m_lines->lineAttributes( cellIndex ) );
la.setDisplayArea( true );
la.setTransparency( 255 - opacity );
// set specific line attribute settings for this cell
m_lines->setLineAttributes( cellIndex, la );
} else {
// remove any cell-specific line attribute settings
// from the indexed cell
m_lines->resetLineAttributes( cellIndex );
}
}
if ( row < m_lines->model()->rowCount(m_lines->rootIndex() ) ) {
QModelIndex cellIndex( m_lines->model()->index( row, column, m_lines->rootIndex() ) );
if ( checked ) {
LineAttributes la( m_lines->lineAttributes( cellIndex ) );
la.setDisplayArea( true );
la.setTransparency( opacity );
// set specific line attribute settings for this cell
m_lines->setLineAttributes( cellIndex, la );
} else {
// remove any cell-specific line attribute settings
// from the indexed cell
m_lines->resetLineAttributes( cellIndex );
}
}
}
if ( doUpdate )
m_chart->update();
}
