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statistics: render title

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Since we want to get rid of QtCharts, we have to render our own
title. Simply keep around a QGraphicsSimpleTextItem and put in
the center of the chart. Define the borders to the scene as
constants.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Berthold Stoeger 2021-01-04 21:41:30 +01:00 • committed by Dirk Hohndel
parent ccc95f938a
commit 90129aa26f
2 changed files with 36 additions and 2 deletions
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32
stats/statsview.cpp
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@ -18,11 +18,14 @@
#include <QAbstractSeries>
#include <QChart>
#include <QGraphicsSceneHoverEvent>
#include <QGraphicsSimpleTextItem>
#include <QLocale>
// Constants that control the graph layouts
static const QColor quartileMarkerColor(Qt::red);
static const double quartileMarkerSize = 15;
static const double quartileMarkerSize = 15.0;
static const double sceneBorder = 5.0; // Border between scene edges and statitistics view
static const double titleBorder = 2.0; // Border between title and chart
static const QUrl urlStatsView = QUrl(QStringLiteral("qrc:/qml/statsview.qml"));
@ -77,6 +80,9 @@ StatsView::StatsView(QWidget *parent) : QQuickWidget(parent),
chart->setAcceptHoverEvents(true);
chart->legend()->setVisible(false);
}
QFont font;
titleFont = QFont(font.family(), font.pointSize(), QFont::Light); // Make configurable
}
StatsView::~StatsView()
@ -95,6 +101,7 @@ void StatsView::plotAreaChanged(const QRectF &)
marker.updatePosition();
if (legend)
legend->resize();
updateTitlePos();
}
void StatsView::replotIfVisible()
@ -136,7 +143,21 @@ T *StatsView::createSeries(Args&&... args)
void StatsView::setTitle(const QString &s)
{
chart->setTitle(s);
if (s.isEmpty()) {
title.reset();
return;
}
title = std::make_unique<QGraphicsSimpleTextItem>(s, chart);
title->setFont(titleFont);
}
void StatsView::updateTitlePos()
{
if (!title)
return;
QRectF rect = chart->plotArea();
title->setPos((rect.width() - title->boundingRect().width()) / 2.0,
sceneBorder);
}
template <typename T, class... Args>
@ -166,11 +187,18 @@ void StatsView::reset()
lineMarkers.clear();
chart->removeAllSeries();
axes.clear();
title.reset();
}
void StatsView::plot(const StatsState &stateIn)
{
state = stateIn;
plotChart();
plotAreaChanged(chart->plotArea());
}
void StatsView::plotChart()
{
if (!chart || !state.var1)
return;
reset();