//! Update the widget that represents the curve on the legend
// this was adapted from QwtPlotCurve::updateLegend()
void HistogramItem::updateLegend( QwtLegend *legend ) const
{
if ( !legend )
return;
QwtPlotItem::updateLegend( legend );
QWidget *widget = legend->find( this );
if ( !widget || !widget->inherits( "QwtLegendItem" ) )
return;
QwtLegendItem *legendItem = ( QwtLegendItem * )widget;
#if QT_VERSION < 0x040000
const bool doUpdate = legendItem->isUpdatesEnabled();
#else
const bool doUpdate = legendItem->updatesEnabled();
#endif
legendItem->setUpdatesEnabled( false );
const int policy = legend->displayPolicy();
if ( policy == QwtLegend::FixedIdentifier )
{
int mode = legend->identifierMode();
legendItem->setCurvePen( QPen( color() ) );
if ( mode & QwtLegendItem::ShowText )
legendItem->setText( title() );
else
legendItem->setText( QwtText() );
legendItem->setIdentifierMode( mode );
}
else if ( policy == QwtLegend::AutoIdentifier )
{
int mode = 0;
legendItem->setCurvePen( QPen( color() ) );
mode |= QwtLegendItem::ShowLine;
if ( !title().isEmpty() )
{
legendItem->setText( title() );
mode |= QwtLegendItem::ShowText;
}
else
{
legendItem->setText( QwtText() );
}
legendItem->setIdentifierMode( mode );
}
legendItem->setUpdatesEnabled( doUpdate );
legendItem->update();
}
/*!
Reset color and fonts of a plot
\sa apply()
*/
void QwtPlotPrintFilter::reset(QwtPlot *plot) const
{
if ( d_data->cache == 0 )
return;
const bool doAutoReplot = plot->autoReplot();
plot->setAutoReplot(false);
const PrivateData::Cache &cache = *d_data->cache;
if ( plot->titleLabel() )
{
QwtTextLabel* title = plot->titleLabel();
if ( title->text().testPaintAttribute(QwtText::PaintUsingTextFont) )
{
QwtText text = title->text();
text.setColor(cache.titleColor);
title->setText(text);
}
else
{
QPalette palette = title->palette();
palette.setColor(
QPalette::Active, Palette::Text, cache.titleColor);
title->setPalette(palette);
}
if ( title->text().testPaintAttribute(QwtText::PaintUsingTextFont) )
{
QwtText text = title->text();
text.setFont(cache.titleFont);
title->setText(text);
}
else
{
title->setFont(cache.titleFont);
}
}
if ( plot->legend() )
{
#if QT_VERSION < 0x040000
QValueList<QWidget *> list = plot->legend()->legendItems();
for ( QValueListIterator<QWidget *> it = list.begin();
it != list.end(); ++it )
#else
QList<QWidget *> list = plot->legend()->legendItems();
for ( QList<QWidget*>::iterator it = list.begin();
it != list.end(); ++it )
#endif
{
QWidget *w = *it;
if ( cache.legendFonts.contains(w) )
w->setFont(cache.legendFonts[w]);
if ( w->inherits("QwtLegendItem") )
{
QwtLegendItem *label = (QwtLegendItem *)w;
const QwtPlotItem *plotItem =
(const QwtPlotItem*)plot->legend()->find(label);
QwtSymbol symbol = label->symbol();
if ( cache.curveSymbolPenColors.contains(plotItem) )
{
QPen pen = symbol.pen();
pen.setColor(cache.curveSymbolPenColors[plotItem]);
symbol.setPen(pen);
}
if ( cache.curveSymbolBrushColors.contains(plotItem) )
{
QBrush brush = symbol.brush();
brush.setColor(cache.curveSymbolBrushColors[plotItem]);
symbol.setBrush(brush);
}
label->setSymbol(symbol);
if ( cache.curveColors.contains(plotItem) )
{
QPen pen = label->curvePen();
pen.setColor(cache.curveColors[plotItem]);
label->setCurvePen(pen);
}
}
}
}
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget(axis);
if ( scaleWidget )
{
QPalette palette = scaleWidget->palette();
palette.setColor(QPalette::Active, Palette::Foreground,
cache.scaleColor[axis]);
scaleWidget->setPalette(palette);
scaleWidget->setFont(cache.scaleFont[axis]);
scaleWidget->setTitle(cache.scaleTitle[axis]);
int startDist, endDist;
scaleWidget->getBorderDistHint(startDist, endDist);
scaleWidget->setBorderDist(startDist, endDist);
}
}
if ( hasBackgroundColor(plot) )
{
QPalette p = plot->palette();
p.setColor(QPalette::Active, Palette::Background, cache.widgetBackground);
plot->setPalette(p);
}
if ( hasBackgroundColor(plot->canvas()) )
{
plot->setCanvasBackground(cache.canvasBackground);
}
const QwtPlotItemList& itmList = plot->itemList();
for ( QwtPlotItemIterator it = itmList.begin();
it != itmList.end(); ++it )
{
reset(*it);
}
delete d_data->cache;
d_data->cache = 0;
plot->setAutoReplot(doAutoReplot);
}
/*!
Change color and fonts of a plot
\sa apply()
*/
void QwtPlotPrintFilter::apply(QwtPlot *plot) const
{
const bool doAutoReplot = plot->autoReplot();
plot->setAutoReplot(false);
delete d_data->cache;
d_data->cache = new PrivateData::Cache;
PrivateData::Cache &cache = *d_data->cache;
if ( plot->titleLabel() )
{
QPalette palette = plot->titleLabel()->palette();
cache.titleColor = palette.color(
QPalette::Active, Palette::Text);
palette.setColor(QPalette::Active, Palette::Text,
color(cache.titleColor, Title));
plot->titleLabel()->setPalette(palette);
cache.titleFont = plot->titleLabel()->font();
plot->titleLabel()->setFont(font(cache.titleFont, Title));
}
if ( plot->legend() )
{
#if QT_VERSION < 0x040000
QValueList<QWidget *> list = plot->legend()->legendItems();
for ( QValueListIterator<QWidget *> it = list.begin();
it != list.end(); ++it )
#else
QList<QWidget *> list = plot->legend()->legendItems();
for ( QList<QWidget*>::iterator it = list.begin();
it != list.end(); ++it )
#endif
{
QWidget *w = *it;
cache.legendFonts.insert(w, w->font());
w->setFont(font(w->font(), Legend));
if ( w->inherits("QwtLegendItem") )
{
QwtLegendItem *label = (QwtLegendItem *)w;
QwtSymbol symbol = label->symbol();
QPen pen = symbol.pen();
QBrush brush = symbol.brush();
pen.setColor(color(pen.color(), CurveSymbol));
brush.setColor(color(brush.color(), CurveSymbol));
symbol.setPen(pen);
symbol.setBrush(brush);
label->setSymbol(symbol);
pen = label->curvePen();
pen.setColor(color(pen.color(), Curve));
label->setCurvePen(pen);
}
}
}
for ( int axis = 0; axis < QwtPlot::axisCnt; axis++ )
{
QwtScaleWidget *scaleWidget = plot->axisWidget(axis);
if ( scaleWidget )
{
cache.scaleColor[axis] = scaleWidget->palette().color(
QPalette::Active, Palette::Foreground);
QPalette palette = scaleWidget->palette();
palette.setColor(QPalette::Active, Palette::Foreground,
color(cache.scaleColor[axis], AxisScale));
scaleWidget->setPalette(palette);
cache.scaleFont[axis] = scaleWidget->font();
scaleWidget->setFont(font(cache.scaleFont[axis], AxisScale));
cache.scaleTitle[axis] = scaleWidget->title();
QwtText scaleTitle = scaleWidget->title();
if ( scaleTitle.testPaintAttribute(QwtText::PaintUsingTextColor) )
{
cache.scaleTitleColor[axis] = scaleTitle.color();
scaleTitle.setColor(
color(cache.scaleTitleColor[axis], AxisTitle));
}
if ( scaleTitle.testPaintAttribute(QwtText::PaintUsingTextFont) )
{
cache.scaleTitleFont[axis] = scaleTitle.font();
scaleTitle.setFont(
font(cache.scaleTitleFont[axis], AxisTitle));
}
scaleWidget->setTitle(scaleTitle);
int startDist, endDist;
scaleWidget->getBorderDistHint(startDist, endDist);
scaleWidget->setBorderDist(startDist, endDist);
}
}
if ( hasBackgroundColor(plot) )
{
QPalette p = plot->palette();
cache.widgetBackground = plot->palette().color(
QPalette::Active, Palette::Background);
p.setColor(QPalette::Active, Palette::Background,
color(cache.widgetBackground, WidgetBackground));
plot->setPalette(p);
}
if ( hasBackgroundColor(plot->canvas()))
{
cache.canvasBackground = plot->canvasBackground();
plot->setCanvasBackground(color(cache.canvasBackground, CanvasBackground));
}
const QwtPlotItemList& itmList = plot->itemList();
for ( QwtPlotItemIterator it = itmList.begin();
it != itmList.end(); ++it )
{
apply(*it);
}
plot->setAutoReplot(doAutoReplot);
}
//! Update the widget that represents the curve on the legend
void QwtPolarCurve::updateLegend( QwtLegend *legend ) const
{
if ( !legend )
return;
QwtPolarItem::updateLegend( legend );
QWidget *widget = legend->find( this );
if ( !widget || !widget->inherits( "QwtLegendItem" ) )
return;
QwtLegendItem *legendItem = ( QwtLegendItem * )widget;
#if QT_VERSION < 0x040000
const bool doUpdate = legendItem->isUpdatesEnabled();
#else
const bool doUpdate = legendItem->updatesEnabled();
#endif
legendItem->setUpdatesEnabled( false );
const int policy = legend->displayPolicy();
if ( policy == QwtLegend::FixedIdentifier )
{
int mode = legend->identifierMode();
if ( mode & QwtLegendItem::ShowLine )
legendItem->setCurvePen( pen() );
if ( mode & QwtLegendItem::ShowSymbol )
legendItem->setSymbol( symbol() );
if ( mode & QwtLegendItem::ShowText )
legendItem->setText( title() );
else
legendItem->setText( QwtText() );
legendItem->setIdentifierMode( mode );
}
else if ( policy == QwtLegend::AutoIdentifier )
{
int mode = 0;
if ( QwtPolarCurve::NoCurve != style() )
{
legendItem->setCurvePen( pen() );
mode |= QwtLegendItem::ShowLine;
}
if ( QwtSymbol::NoSymbol != symbol().style() )
{
legendItem->setSymbol( symbol() );
mode |= QwtLegendItem::ShowSymbol;
}
if ( !title().isEmpty() )
{
legendItem->setText( title() );
mode |= QwtLegendItem::ShowText;
}
else
{
legendItem->setText( QwtText() );
}
legendItem->setIdentifierMode( mode );
}
legendItem->setUpdatesEnabled( doUpdate );
legendItem->update();
}