Resize images asynchronously in the edit dialog

data/gtk/details_window.blp

@@ -40,6 +40,13 @@ template DetailsWindow : Adw.Window {
             Adw.PreferencesGroup cover_group {
                 Adw.Clamp cover_clamp {
                     maximum-size: 200;
+                    Overlay {
+                        [overlay]
+                        Spinner spinner {
+                            margin-start: 72;
+                            margin-end: 72;
+                        }
+
                         Overlay cover_overlay {
                             halign: center;
                             valign: center;
@@ -86,6 +93,7 @@ template DetailsWindow : Adw.Window {
                         }
                     }
                 }
+            }
 
             Adw.PreferencesGroup title_group {
                 title: _("Title");

src/details_window.py

@@ -35,10 +35,12 @@ from .steamgriddb import SGDBSave
 class DetailsWindow(Adw.Window):
     __gtype_name__ = "DetailsWindow"
 
+    cover_overlay = Gtk.Template.Child()
     cover = Gtk.Template.Child()
     cover_button_edit = Gtk.Template.Child()
     cover_button_delete_revealer = Gtk.Template.Child()
     cover_button_delete = Gtk.Template.Child()
+    spinner = Gtk.Template.Child()
 
     name = Gtk.Template.Child()
     developer = Gtk.Template.Child()
@@ -222,6 +224,11 @@ class DetailsWindow(Adw.Window):
     def focus_executable(self, *_args):
         self.set_focus(self.executable)
 
+    def toggle_loading(self):
+        self.apply_button.set_sensitive(not self.apply_button.get_sensitive())
+        self.spinner.set_spinning(not self.spinner.get_spinning())
+        self.cover_overlay.set_opacity(not self.cover_overlay.get_opacity())
+
     def set_cover(self, _source, result, *_args):
         try:
             path = self.file_dialog.open_finish(result).get_path()
@@ -231,7 +238,12 @@ class DetailsWindow(Adw.Window):
         self.cover_button_delete_revealer.set_reveal_child(True)
         self.cover_changed = True
 
+        def resize():
             self.game_cover.new_cover(resize_cover(self.win, path))
+            self.toggle_loading()
+
+        self.toggle_loading()
+        GLib.Thread.new(None, resize)
 
     def choose_cover(self, *_args):
         self.file_dialog.open(self, None, self.set_cover)

src/utils/save_cover.py

@@ -36,8 +36,7 @@ def resize_cover(win, cover_path=None, pixbuf=None):
     with Image.open(cover_path) as image:
         if getattr(image, "is_animated", False):
             frames = tuple(
-                frame.copy().resize((200, 300))
+                frame.resize((200, 300)) for frame in ImageSequence.Iterator(image)
-                for frame in ImageSequence.Iterator(image)
             )
 
             tmp_path = Path(Gio.File.new_tmp("XXXXXX.gif")[0].get_path())