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statistics: implement rectangle selection in scatter plot

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Allow the user to select regions of the scatter plot using
a rectangular selection. When shift is pressed, do an
incremental selection.

Unfortunately, the list-selection code is so slow that this
becomes unusable for a large number of selected dives.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
This commit is contained in:
Berthold Stoeger 2021-02-01 23:17:04 +01:00 • committed by Dirk Hohndel
parent e38b78b2aa
commit d63d4cd3c3
16 changed files with 207 additions and 36 deletions
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8
stats/statsseries.h
View file

@ -4,11 +4,13 @@
#ifndef STATS_SERIES_H
#define STATS_SERIES_H
#include <vector>
#include <QPointF>
class StatsAxis;
class StatsView;
struct dive;
class QRectF;
class StatsSeries {
public:
@ -17,7 +19,11 @@ public:
virtual void updatePositions() = 0; // Called if chart geometry changes.
virtual bool hover(QPointF pos) = 0; // Called on mouse movement. Return true if an item of this series is highlighted.
virtual void unhighlight() = 0; // Unhighlight any highlighted item.
virtual void selectItemsUnderMouse(const QPointF &pos, bool shiftPressed) = 0;
// Returns true if an item was under the mouse.
virtual bool selectItemsUnderMouse(const QPointF &pos, bool shiftPressed) = 0;
virtual bool supportsLassoSelection() const;
// Needs only be defined if supportsLassoSelection() returns true.
virtual void selectItemsInRect(const QRectF &rect, bool shiftPressed, const std::vector<dive *> &oldSelection);
virtual void divesSelected(const QVector<dive *> &dives);
protected: