hook single_addon_selected

qt/aqt/addons.py

@@ -784,6 +784,7 @@ class AddonsDialog(QDialog):
                 or self.mgr.configAction(addon.dir_name)
             )
         )
+        gui_hooks.addons_dialog_did_change_selected_addon(self, addon)
         return
 
     def selectedAddons(self) -> List[str]:

qt/aqt/gui_hooks.py

@@ -135,6 +135,40 @@ class _AddonConfigEditorWillSaveJsonFilter:
 addon_config_editor_will_save_json = _AddonConfigEditorWillSaveJsonFilter()
 
 
+class _AddonsDialogDidChangeSelectedAddonHook:
+    """Allows doing an action when a single add-on is selected."""
+
+    _hooks: List[
+        Callable[["aqt.addons.AddonsDialog", "aqt.addons.AddonMeta"], None]
+    ] = []
+
+    def append(
+        self, cb: Callable[["aqt.addons.AddonsDialog", "aqt.addons.AddonMeta"], None]
+    ) -> None:
+        """(dialog: aqt.addons.AddonsDialog, add_on: aqt.addons.AddonMeta)"""
+        self._hooks.append(cb)
+
+    def remove(
+        self, cb: Callable[["aqt.addons.AddonsDialog", "aqt.addons.AddonMeta"], None]
+    ) -> None:
+        if cb in self._hooks:
+            self._hooks.remove(cb)
+
+    def __call__(
+        self, dialog: aqt.addons.AddonsDialog, add_on: aqt.addons.AddonMeta
+    ) -> None:
+        for hook in self._hooks:
+            try:
+                hook(dialog, add_on)
+            except:
+                # if the hook fails, remove it
+                self._hooks.remove(hook)
+                raise
+
+
+addons_dialog_did_change_selected_addon = _AddonsDialogDidChangeSelectedAddonHook()
+
+
 class _AddonsDialogWillShowHook:
     """Allows changing the add-on dialog before it is shown. E.g. add
         buttons."""

qt/tools/genhooks_gui.py

@@ -494,6 +494,11 @@ def emptyNewCard():
         doc="""Allows changing the add-on dialog before it is shown. E.g. add
         buttons.""",
     ),
+    Hook(
+        name="addons_dialog_did_change_selected_addon",
+        args=["dialog: aqt.addons.AddonsDialog", "add_on: aqt.addons.AddonMeta"],
+        doc="""Allows doing an action when a single add-on is selected.""",
+    ),
     # Other
     ###################
     Hook(