update api_break.dox

qgis · May 31, 2021 · 9bc6d4d · 9bc6d4d
1 parent 9fd0e34
commit 9bc6d4d
Showing 1 changed file with 8 additions and 1 deletion.
diff --git a/doc/api_break.dox b/doc/api_break.dox
@@ -19,10 +19,17 @@ This page tries to maintain a list with incompatible changes that happened in pr
 QGIS 3.20        {#qgis_api_break_3_20}
 =========
 
+QgsMapRendererJob       {#qgis_api_break_3_20_qgsmaprendererjob}
+-----------------
+
+- QgsMapRendererJob::start is no longer virtual. It has been replaced with QgsMapRendererJob::startPrivate. The method QgsMapRendererJob::start checks if the map can be rendered before calling QgsMapRendererJob::startPrivate.
+Subclasses have to implement the virtual method startPrivate to start the rendering of the map. For the actual subclasses (QgsMapRendererParallelJob, QgsMapRendererSequentialJob, ...), the start method
+is replaced by startPrivate method without change.
+
 setDataSource       {#qgis_api_break_3_20_setdatasource}
 -------------
 
-- QgsMapLayer::setDataSource is no longer virtual. If has been replaced with QgsMapLayer::setDataSourcePrivate. This is only relevant for subclassing QgsMapLayer, for code that only uses the subclasses (QgsVectorLayer, QgsRasterLayer, ...) this has no effect.
+- QgsMapLayer::setDataSource is no longer virtual. It has been replaced with QgsMapLayer::setDataSourcePrivate. This is only relevant for subclassing QgsMapLayer, for code that only uses the subclasses (QgsVectorLayer, QgsRasterLayer, ...) this has no effect.
 
 QGIS 3.4        {#qgis_api_break_3_4}
 ========