Hi Tim, You can have a look at easycustomlabeling plugin code. It's sets those expressions for label alignement.
FYI I should be working on a new version of it taking profit of the geometry generators power soon , and we might be able to revive the QEP47 to revive the idea of porting this natively to core. Best regards Regis Le jeu. 11 avr. 2019 à 00:54, Tim Sutton <[email protected]> a écrit : > To clarify a little, I am trying to avoid the label text crossing the > call-out line. > > Regards > > Tim > > On 10 Apr 2019, at 23:02, Tim Sutton <[email protected]> wrote: > > Hi Friends > > So I am using logic like this* to make call out labels using a geometry > generator: > > make_line( > closest_point($geometry, > make_point( "auxiliary_storage_labeling_positionx" , > "auxiliary_storage_labeling_positiony" )), > make_point( "auxiliary_storage_labeling_positionx" , > "auxiliary_storage_labeling_positiony" ) > ) > > The line runs from the closest point along the edge of the polygon to the > bottom left corner of the label box. With this configuration it works well > when my ‘lollipop’ callout label is north-east of the polygon being > labelled: > > <Screenshot 2019-04-10 at 22.54.29.jpg> > > But doesn’t work when the label is e.g. south west of the polygon: > > <Screenshot 2019-04-10 at 22.54.54.jpg> > > Now I am wondering if we have any options for getting the geometry of the > label box so I can do the reverse and get the closest point along the edge > of the label box to the polygon being labelled. So my question: > > Is there any sneaky trick for getting the geometry of the label box for a > feature in an expression? And no, using an opaque background for my label > to mask away the call out line doesn’t really hack it. I know the label box > isn’t being calculated at the time the polygon is being rendered so the > answer is probably ’no’ but maybe someone else has a clever idea to make > may lollipops work when labels are south (or east or west for that matter) > of the feature being labelled? > > Thanks! > > Regards > > Tim > > > > — > > > <KartozaNewLogoThumbnail.jpg> > > > > > > > *Tim Sutton* > > *Co-founder:* Kartoza > *Ex Project chair:* QGIS.org <http://qgis.org/> > > Visit http://kartoza.com to find out about open source: > > Desktop GIS programming services > Geospatial web development > GIS Training > Consulting Services > > *Skype*: timlinux > *IRC:* timlinux on #qgis at freenode.net > > I'd love to connect. Here's my calendar link > <https://calendly.com/timlinux> to make finding time easy. > > > — > > > > > > > > > *Tim Sutton* > > *Co-founder:* Kartoza > *Ex Project chair:* QGIS.org > > Visit http://kartoza.com to find out about open source: > > Desktop GIS programming services > Geospatial web development > GIS Training > Consulting Services > > *Skype*: timlinux > *IRC:* timlinux on #qgis at freenode.net > > I'd love to connect. Here's my calendar link > <https://calendly.com/timlinux> to make finding time easy. > > _______________________________________________ > QGIS-Developer mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
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