Improve tool tips

Use rich text in tool tips so Qt can wrap the text.

Re spine-tools/Spine-Toolbox#2542

spine_items/exporter/mvcmodels/mapping_editor_table_model.py

@@ -45,7 +45,7 @@
     DefaultValueIndexNameMapping,
     ParameterDefaultValueTypeMapping,
 )
-from spinetoolbox.helpers import color_from_index
+from spinetoolbox.helpers import color_from_index, plain_to_rich
 from ..commands import SetMappingNullable, SetMappingPositions, SetMappingProperty
 
 
@@ -152,9 +152,9 @@ def data(self, index, role=Qt.ItemDataRole.DisplayRole):
             return self._mapping_colors.get(m.position, QColor(Qt.GlobalColor.gray).lighter())
         elif role == Qt.ItemDataRole.ToolTipRole:
             if column == EditorColumn.FILTER:
-                return "Regular expression to filter database items."
+                return plain_to_rich("Regular expression to filter database items.")
             elif column == EditorColumn.NULLABLE:
-                return "When checked, ignore this row if it yields nothing to export."
+                return plain_to_rich("When checked, ignore this row if it yields nothing to export.")
         if role == self.MAPPING_ITEM_ROLE:
             return self._mappings[index.row()]
         return None

spine_items/importer/mvcmodels/mappings_model.py

@@ -17,7 +17,7 @@
 import re
 from PySide6.QtCore import QAbstractItemModel, QModelIndex, Qt, Signal
 from PySide6.QtGui import QColor, QFont
-from spinetoolbox.helpers import unique_name
+from spinetoolbox.helpers import plain_to_rich, list_to_rich_text, unique_name
 from spinedb_api.parameter_value import join_value_and_type, split_value_and_type
 from spinedb_api import from_database, ParameterValueFormatError
 from spinedb_api.import_mapping.import_mapping import ScenarioBeforeAlternativeMapping
@@ -214,9 +214,9 @@ def _table_list_data(self, index, role):
             list_item = self._mappings[row]
             if not list_item.empty:
                 if not list_item.in_source:
-                    return "Table isn't in source data."
+                    return plain_to_rich("Table isn't in source data.")
                 if not list_item.in_specification:
-                    return "Table's mappings haven't been saved with the specification yet."
+                    return plain_to_rich("Table's mappings haven't been saved with the specification yet.")
             return None
         if role == Qt.ItemDataRole.FontRole:
             return self._add_table_row_font if self._mappings[index.row()].empty else None
@@ -288,11 +288,9 @@ def _mapping_data(flattened_mappings, index, role):
         if role == Qt.ItemDataRole.ToolTipRole:
             if column == FlattenedColumn.POSITION:
                 issues = flattened_mappings.display_row_issues(index.row())
-                if issues:
-                    return issues
-                return None
+                return list_to_rich_text(issues) if issues else None
             if column == FlattenedColumn.REGEXP:
-                return "Enter regular expression to filter importer data."
+                return plain_to_rich("Enter regular expression to filter importer data.")
         return None
 
     def headerData(self, section, orientation, role=Qt.ItemDataRole.DisplayRole):

tests/importer/mvcmodels/test_mappings_model.py

@@ -173,7 +173,8 @@ def test_turn_empty_row_into_non_real_table(self):
         self.assertEqual(index.data(Qt.ItemDataRole.CheckStateRole), Qt.CheckState.Checked)
         self.assertIsNone(index.data(Qt.ItemDataRole.FontRole))
         self.assertEqual(
-            index.data(Qt.ItemDataRole.ToolTipRole), "Table's mappings haven't been saved with the specification yet."
+            index.data(Qt.ItemDataRole.ToolTipRole),
+            "<qt>Table's mappings haven't been saved with the specification yet.</qt>",
         )
         flags = self._model.flags(index)
         self.assertEqual(