From d24f813f3f2a05c112e803e4256b53535895fc98 Mon Sep 17 00:00:00 2001
From: Jedidiah Barber <contact@jedbarber.id.au>
Date: Wed, 14 Jul 2021 11:49:10 +1200
Subject: Initial mirror commit

---
 src/charts/ChartDataLine.cpp | 80 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)
 create mode 100644 src/charts/ChartDataLine.cpp

(limited to 'src/charts/ChartDataLine.cpp')

diff --git a/src/charts/ChartDataLine.cpp b/src/charts/ChartDataLine.cpp
new file mode 100644
index 0000000..17919cd
--- /dev/null
+++ b/src/charts/ChartDataLine.cpp
@@ -0,0 +1,80 @@
+#include "ChartDataLine.h"
+#include "ChartScene.h"
+#include "ChartMarker.h"
+
+const QColor ChartDataLine::MarkerColor(Qt::blue);
+const QColor ChartDataLine::FillColor(0, 0, 255, 128);
+
+ChartDataLine::ChartDataLine(ChartScene* scene):
+    scene(scene),
+    origin(getDataSetOrigin()),
+    xSpacing(scene->getXTickSpacing())
+{
+}
+
+QPointF ChartDataLine::getDataSetOrigin() const
+{
+    QSizeF padding = scene->DataSetPadding;
+    QPointF res = scene->getChartOrigin();
+    res.ry() -= padding.height();
+    if(scene->getDataDirection() == 1)
+        res.rx() += padding.width();
+    else
+        res.rx() += scene->getChartRect().width();
+    return res;
+}
+
+void ChartDataLine::paint()
+{
+    QPainterPath linePath = createLinePath();
+    addLinePath(linePath);
+    addAreaPath(linePath);
+}
+
+QPainterPath ChartDataLine::createLinePath()
+{
+    QList<DataPoint> dataSet = scene->getDataSet();
+    QPointF firstPoint = getDataPos(0, dataSet.first().value);
+    QPainterPath linePath(firstPoint);
+    for (int i = 0; i < dataSet.size(); i++)
+        addLineSegment(linePath, i);
+    return linePath;
+}
+
+void ChartDataLine::addLineSegment(QPainterPath& path, int i)
+{
+    DataPoint dataPoint = scene->getDataSet().at(i);
+    QPointF pos = getDataPos(i, dataPoint.value);
+    QString toolTipText = createToolTipText(dataPoint);
+    scene->addItem(new ChartMarker(pos, toolTipText));
+    path.lineTo(pos);
+}
+
+QPointF ChartDataLine::getDataPos(int index, int yValue)
+{
+    qreal xPos = scene->getDataDirection() * index * xSpacing;
+    qreal yPos = scene->getYPosFromValue(yValue - scene->getMinY());
+    return origin + QPointF(xPos, -yPos);
+}
+
+QString ChartDataLine::createToolTipText(const DataPoint& dataPoint) const
+{
+    return scene->getXLabel() + ": <b>" + dataPoint.toolTipLabel + "</b><br/>" +
+        scene->getYLabel() + ": <b>" + QString::number(dataPoint.value) + "</b>";
+}
+
+void ChartDataLine::addLinePath(const QPainterPath& path)
+{
+    QPen pen(MarkerColor);
+    pen.setWidth(2);
+    scene->addPath(path, pen);
+}
+
+void ChartDataLine::addAreaPath(const QPainterPath& linePath)
+{
+    QPainterPath areaPath(origin);
+    areaPath.lineTo(QPointF(linePath.elementAt(0)));
+    areaPath.connectPath(linePath);
+    areaPath.lineTo(QPointF(linePath.currentPosition().x(), origin.y()));
+    scene->addPath(areaPath, QPen(FillColor), QBrush(FillColor));
+}
-- 
cgit