[advanced digitizing] Implement visual construction guides (Request in QGIS)

[qgis-bot]

Request for documentation

From pull request qgis/QGIS#57584
Author: @nirvn
QGIS version: 3.38

[advanced digitizing] Implement visual construction guides

PR Description:

Description

This PR adds visual construction guides to the advanced digitizing dock widget which builds on top of our preexisting CAD construction mode.

UI wise, the functionality is exposed through a set of actions within a new drop-down menu attached to the construction activation toolbar button:

When recording construction guides, QGIS will render all construction steps taken as dashed lines. Those lines will remain visible as long as advanced digitizing is enabled. The guides are snap-able, allowing for construction steps to begin mid-way into a previous set of steps too.

In action:

vokoscreenNG-2024-05-28_11-26-37.mp4

The construction guides are stored in a vector layer, which is exposed through the advanced digitizing dock widget, allowing for further customization of those guides via e.g. python plugins.

Commits tagged with [need-docs] or [FEATURE]