maptoolpick2dcells.h File Reference

Slice CF.3.3 — canvas map tool that selects 2D mesh cells via box or lasso, then emits the picked triangle index list. More...

#include "map/tools/maptool.h"
#include "plot/plotattribute.h"
#include <QPoint>
#include <QPolygon>
#include <QPolygonF>
#include <QPointer>
#include <QRectF>
#include <QVector>

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Classes
class	MapToolPick2DCells

Detailed Description

Slice CF.3.3 — canvas map tool that selects 2D mesh cells via box or lasso, then emits the picked triangle index list.

Author

Caleb Buahin caleb.nosp@m..bua.nosp@m.hin@g.nosp@m.mail.nosp@m..com

Date

2026

License\n GPL-3.0-or-later

Behaviour:

• Box mode (default) — left-click and drag rubber-band; on release, calls SWMM2DResultsLayer::pickCellsInRect and emits the result. Mirrors the existing OpenSWMMVisMapToolSelect rubber-band logic.
• Lasso mode — left-click adds polygon vertices, double-click closes, Escape cancels. Calls pickCellsInPolygon. Mirrors MapToolAddSubcatchment's polygon state machine.
• Single click (no drag) — calls pickCellAt and emits a one-element list, falling back to box mode for selection.
• B / L keys — swap modes while active.

The tool finds the first SWMM2DResultsLayer on the canvas at activate() time; selection is reported against that layer. The host wire is cellsPicked(layer, triIdxList) which SWMMVis::openComparisonPlotForCells consumes.