Enhance get_icon function to support standard Qt icons

Author: PierreRaybaut

CHANGELOG.md

@@ -4,6 +4,10 @@
 
 ✨ New features:
 
+* `guidata.configtools.get_icon`:
+  * This function retrieves a QIcon from the specified image file.
+  * Now supports Qt standard icons (e.g. "MessageBoxInformation" or "DialogApplyButton").
+
 * Added a `readonly` parameter to `StringItem` and `TextItem` in `guidata.dataset.dataitems`:
   * This allows these items to be set as read-only, preventing user edits in the GUI.
   * The `readonly` property is now respected in the corresponding widgets (see `guidata.dataset.qtitemwidgets`).

guidata/configtools.py

@@ -197,8 +197,19 @@ def get_icon(name: str, default: str = "not_found.png") -> QG.QIcon:
     try:
         return ICON_CACHE[name]
     except KeyError:
-        # Importing Qt here because this module should be independent from it
-        from qtpy import QtGui as QG  # pylint: disable=import-outside-toplevel
+        # Importing Qt objects here because this module should not depend on them
+        # pylint: disable=import-outside-toplevel
+
+        # Try to get standard icon first
+        from guidata.qthelpers import get_std_icon
+
+        try:
+            return get_std_icon(name)
+        except AttributeError:
+            pass
+
+        # Retrieve icon from file (original implementation)
+        from qtpy import QtGui as QG
 
         icon = QG.QIcon(get_image_file_path(name, default))
         ICON_CACHE[name] = icon