GPXSee/src/GUI/elevationgraphitem.cpp

#include <QLocale>
#include "tooltip.h"
#include "elevationgraphitem.h"


ElevationGraphItem::ElevationGraphItem(const Graph &graph, GraphType type,
  int width, const QColor &color, Qt::PenStyle style, QGraphicsItem *parent)
  : GraphItem(graph, type, width, color, style, parent)
{
	_min = GraphItem::min();
	_max = GraphItem::max();

	_ascent = _descent = 0;
	for (int i = 0; i < graph.size(); i++) {
		const GraphSegment &segment = graph.at(i);

		for (int j = 1; j < segment.size(); j++) {
			qreal cur = segment.at(j).y();
			qreal prev = segment.at(j-1).y();

			if (cur > prev)
				_ascent += cur - prev;
			if (cur < prev)
				_descent += prev - cur;
		}
	}
}

ToolTip ElevationGraphItem::info() const
{
	ToolTip tt;
	qreal scale = (_units == Metric) ? 1.0 : M2FT;
	QString su = (_units == Metric) ? tr("m") : tr("ft");
	QLocale l(QLocale::system());

	tt.insert(tr("Ascent"), l.toString(ascent() * scale, 'f', 0)
	  + UNIT_SPACE + su);
	tt.insert(tr("Descent"), l.toString(descent() * scale, 'f', 0)
	  + UNIT_SPACE + su);
	tt.insert(tr("Maximum"), l.toString(max() * scale, 'f', 0)
	  + UNIT_SPACE + su);
	tt.insert(tr("Minimum"), l.toString(min() * scale, 'f', 0)
	  + UNIT_SPACE + su);

	return tt;
}