Project: QGIS
Version: 3.8
This is a huge one! During the developer's meeting in A Coruña, Matthias Kuhn took the opportunity to implement a frequently-asked-for feature in our labeling engine: Geometry Generator support.
Just like Geometry Generators for symbols, we now allow label paths and positions to be calculated using dynamically-evaluated geometry expressions. You can take advantage of the rich support for geometry processing which QGIS' expression engine exposes, and use this to do ALL sorts of pre-processing to your feature geometries before they are labelled. Want to place labels around the start or end point of linestring geometries? What about dynamically smoothing and simplifying the path used for labeling river features, based on the current map scale? How about buffering polygon objects inward by a percentage of their area, and then labeling around the perimeter of this shrunken area? Now, it's ALL possible, thanks to the power of labeling geometry generators!
This feature was funded by QGIS user group switzerland
This feature was developed by Matthias Kuhn (OPENGIS.ch)