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#8662 QtCharts: Snap tooltip to closest curve point.

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Magne Sjaastad 2022-03-14 16:47:25 +01:00 committed by Kristian Bendiksen
parent c00aea75fb
commit c03252a581
1 changed files with 36 additions and 3 deletions
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39
ApplicationLibCode/UserInterface/RiuQtChartsPlotWidget.cpp
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@ -47,6 +47,7 @@
#include <QValueAxis>
#include <QtGlobal>
#include <cmath>
#include <limits>
using namespace QtCharts;
@ -1251,20 +1252,52 @@ void RiuQtChartsPlotWidget::tooltip( const QPointF& point, bool state )
QAbstractSeries* series = qobject_cast<QAbstractSeries*>( sender() );
if ( !m_toolTip ) m_toolTip = new RiuQtChartsToolTip( qtChart(), series );
auto xySeries = dynamic_cast<QLineSeries*>( series );
auto snapToPoint = point;
if ( xySeries )
{
auto points = xySeries->pointsVector();
int closestIndex = -1;
for ( int i = 0; i < points.size() - 1; i++ )
{
if ( point.x() > points[i + 1].x() ) continue;
if ( points[i].x() < point.x() && point.x() < points[i + 1].x() )
{
if ( std::fabs( points[i].x() - point.x() ) < std::fabs( point.x() - points[i + 1].x() ) )
{
closestIndex = i;
}
else
{
closestIndex = i + 1;
}
break;
}
}
if ( closestIndex > 0 )
{
snapToPoint = points[closestIndex];
}
}
if ( state )
{
QString nameFromSeries = createNameFromSeries( series );
QDateTime date = QDateTime::fromMSecsSinceEpoch( point.x() );
QDateTime date = QDateTime::fromMSecsSinceEpoch( snapToPoint.x() );
QString dateString = RiaQDateTimeTools::toStringUsingApplicationLocale( date, "hh:mm dd.MMMM.yyyy" );
QString text = QString( "%1 (%2)" ).arg( point.y() ).arg( dateString );
QString text = QString( "%1 (%2)" ).arg( snapToPoint.y() ).arg( dateString );
if ( !nameFromSeries.isEmpty() ) text.prepend( nameFromSeries + ": " );
m_toolTip->setText( text );
m_toolTip->setAnchor( point );
m_toolTip->setAnchor( snapToPoint );
m_toolTip->setSeries( series );
m_toolTip->setZValue( 200 );
m_toolTip->updateGeometry();