legendclasseditcommands.h File Reference

QUndoCommand wrappers for per-class renderer edits driven from the legend (Slice BB Phase 8.6.16). More...

#include <QColor>
#include <QPointer>
#include <QString>
#include <QUndoCommand>

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Classes
class	openswmmvis::map::SetRendererClassColorCommand
	Records a per-class colour change on a layer's IFeatureRenderer. More...
class	openswmmvis::map::SetRendererClassSizeCommand
	Records a per-class size (or line width) change on a layer's IFeatureRenderer. Mirrors SetRendererClassColorCommand semantics: snapshots sizeForClass(classKey) at construction, restores it on undo, and merges consecutive edits on the same target so spinbox drags collapse to a single undo step. More...

Namespaces
namespace	openswmmvis
namespace	openswmmvis::map

Detailed Description

QUndoCommand wrappers for per-class renderer edits driven from the legend (Slice BB Phase 8.6.16).

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

Every per-class colour / size / symbol edit issued by the legend's right-click menu or by the LegendPropertiesDialog Layers tab flows through one of these commands so Ctrl+Z reverses it uniformly across every view of the same data (canvas paint, on-canvas legend, dock, dialog).

The command stores the layer + classKey, snapshots the renderer's "before" state through IFeatureRenderer::colorForClass (or sibling queries), and on undo writes that snapshot back via setColorForClass. Mutating the renderer is followed by an explicit emit of layer->repaintRequested() — the canvas + legend overlay are both subscribed to it (existing signal chain).

The layer is held via QPointer so the command becomes a clean no-op if the layer is removed before undo / redo fires.