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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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4
stats/statsview.h
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@ -19,6 +19,7 @@ struct StatsVariable;
class StatsSeries;
class CategoryAxis;
class ChartItem;
class ChartRectLineItem;
class ChartTextItem;
class CountAxis;
class HistogramAxis;
@ -142,7 +143,10 @@ private:
ChartItemPtr<Legend> legend;
Legend *draggedItem;
ChartItemPtr<RegressionItem> regressionItem;
ChartItemPtr<ChartRectLineItem> selectionRect;
QPointF dragStartMouse, dragStartItem;
bool shiftSelection;
std::vector<dive *> oldSelection;
void hoverEnterEvent(QHoverEvent *event) override;
void hoverMoveEvent(QHoverEvent *event) override;