profile: first rudimentary port of the ToolTipItem to qt-quick

Still behaves weirdly when panning the chart.

No support for moving the ToolTipItem.

Doesn't add information on bookmarks under the mouse cursor.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

profile-widget/tooltipitem.h

@@ -0,0 +1,28 @@
+// SPDX-License-Identifier: GPL-2.0
+#ifndef PROFILE_TOOLTIPITEM_H
+#define PROFILE_TOOLTIPITEM_H
+
+#include "qt-quick/chartitem.h"
+
+#include <QFont>
+#include <QPixmap>
+
+struct dive;
+struct plot_info;
+
+class ToolTipItem : public ChartRectItem {
+public:
+	ToolTipItem(ChartView &view, double dpr);
+	void update(const dive *d, double dpr, int time, const plot_info &pInfo, bool inPlanner);
+private:
+	QFont font;
+	QFontMetrics fm;
+	double fontHeight;
+	QPixmap title;
+	double width, height;
+
+	QPixmap stringToPixmap(const QString &s) const;
+};
+
+
+#endif // PROFILE_TOOLTIPITEM