meshprofileoverlay.h File Reference

Map-canvas overlay for a 2D-mesh longitudinal profile: the traced path drawn persistently on the map plus a position arrow that mirrors the profile chart's cursor (and can be dragged on the map via MapToolProfileMarker). More...

#include <QPointF>
#include <QVector>
#include <functional>

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Classes
class	MeshProfileOverlay

Detailed Description

Map-canvas overlay for a 2D-mesh longitudinal profile: the traced path drawn persistently on the map plus a position arrow that mirrors the profile chart's cursor (and can be dragged on the map via MapToolProfileMarker).

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

A lightweight geometry model + widget-space painter (NOT a QGraphicsItem). MapCanvas owns the pointer and paints it via paint() AFTER the QSG mesh frame is composited, so the line and marker always sit on top of the 2D flood-map mesh (a scene item can't — the QSG frame is blitted over the whole QGraphicsScene buffer). Its lifetime is owned by the MeshProfilePlotDialog — created when the profile window opens and detached/destroyed when it closes. The traced polyline is already in scene coords (sx = mapX, sy = -mapY, the MapToolMeshProfile convention).