Some small Python fixes about Qt, Python and Processing

dynamic_layers/core/layer_datasource_modifier.py

@@ -7,14 +7,15 @@
 from qgis.core import (
     QgsFeature,
     QgsMapLayer,
+    QgsProcessingException,
     QgsProject,
     QgsReadWriteContext,
     QgsVectorLayer,
 )
 from qgis.PyQt.QtXml import QDomDocument
 
 from dynamic_layers.definitions import CustomProperty
-from dynamic_layers.tools import string_substitution
+from dynamic_layers.tools import string_substitution, tr
 
 
 class LayerDataSourceModifier:
@@ -51,7 +52,9 @@ def compute_new_uri(self, search_and_replace_dictionary: dict = None):
         )
 
         if not new_uri:
-            raise Exception(f"New URI invalid : {new_uri}")
+            raise QgsProcessingException(tr(
+                "New URI is invalid. Was it a valid QGIS expression ?"
+            ) + " " + str(new_uri))
 
         # Set the layer datasource
         self.set_data_source(new_uri)

dynamic_layers/dynamic_layers.py

@@ -6,6 +6,7 @@
 
 from functools import partial
 from pathlib import Path
+from typing import Optional
 
 from qgis import processing
 from qgis.core import (
@@ -356,7 +357,7 @@ def populate_layer_table(self):
                 self.dlg.twLayers.setItem(tw_row_count, i, new_item)
 
     @staticmethod
-    def get_layer_property(layer: QgsMapLayer, prop: str) -> str | None:
+    def get_layer_property(layer: QgsMapLayer, prop: str) -> Optional[str]:
         """
         Get a layer property
         """
@@ -766,9 +767,9 @@ def on_copy_from_project_clicked(self):
             self.project.writeEntry(WmsProjectProperty.Capabilities, "/", True)
 
         self.dlg.inProjectTitle.setText(f"'{p_title}'" if self.is_expression else p_title)
-        self.dlg.inProjectAbstract.setText(f"'{p_abstract}'" if self.is_expression else p_abstract)
+        self.dlg.inProjectAbstract.setPlainText(f"'{p_abstract}'" if self.is_expression else p_abstract)
 
-    def on_project_property_changed(self, prop: str) -> str | None:
+    def on_project_property_changed(self, prop: str) -> Optional[str]:
         """
         Save project dynamic property in the project
         when the user changes the content
@@ -879,11 +880,10 @@ def on_apply_variables_clicked(self):
     def generate_projects_clicked():
         """ Open the Processing algorithm dialog. """
         # noinspection PyUnresolvedReferences
-        dialog = processing.createAlgorithmDialog(
+        processing.execAlgorithmDialog(
             "dynamic_layers:generate_projects",
             {}
         )
-        dialog.show()
 
     def run(self):
         """Run method that performs all the real work"""