feat: add keyboard shortcuts (#776)

data/gradience.gresource.xml

@@ -27,6 +27,8 @@
     <file preprocess="xml-stripblanks">ui/theming_empty_group.ui</file>
     <file preprocess="xml-stripblanks">ui/welcome_window.ui</file>
     <file preprocess="xml-stripblanks">ui/window.ui</file>
+    <file preprocess="xml-stripblanks" alias="gtk/help-overlay.ui">ui/help_overlay.ui</file>
+
     <file>images/welcome.svg</file>
     <file>style.css</file>
   </gresource>

data/ui/help_overlay.blp

@@ -0,0 +1,44 @@
+using Gtk 4.0;
+
+ShortcutsWindow help_overlay {
+  modal: true;
+
+  ShortcutsSection {
+    section-name: "shortcuts";
+    max-height: 10;
+
+    ShortcutsGroup {
+      title: C_("shortcut window", "General");
+
+      ShortcutsShortcut {
+        title: C_("shortcut window", "Show Shortcuts");
+        action-name: "win.show-help-overlay";
+      }
+
+      ShortcutsShortcut {
+        title: C_("shortcut window", "Show Apply Dialog");
+        action-name: "app.apply_color_scheme";
+      }
+
+      ShortcutsShortcut {
+        title: C_("shortcut window", "Manage Presets");
+        action-name: "app.manage_presets";
+      }
+
+      ShortcutsShortcut {
+        title: C_("shortcut window", "Save Preset");
+        action-name: "app.save_preset";
+      }
+
+      ShortcutsShortcut {
+        title: C_("shortcut window", "Preferences");
+        action-name: "app.preferences";
+      }
+
+      ShortcutsShortcut {
+        title: C_("shortcut window", "Quit");
+        action-name: "app.quit";
+      }
+    }
+  }
+}

data/ui/meson.build

@@ -16,6 +16,7 @@ blueprints = custom_target('blueprints',
     'preset_row.blp',
     'builtin_preset_row.blp',
     'explore_preset_row.blp',
+    'help_overlay.blp',
     'save_dialog.blp',
     'shell_prefs_window.blp',
     'shell_theming_group.blp',

data/ui/window.blp

@@ -129,6 +129,11 @@ menu main-menu {
       action: "app.preferences";
     }
 
+    item {
+      label: _("Keyboard Shortcuts");
+      action: "win.show-help-overlay";
+    }
+
     item {
       label: _("About Gradience");
       action: "app.about";

gradience/frontend/main.py

@@ -130,16 +130,19 @@ def do_activate(self):
                         self.open_preset_directory)
 
         self.actions.create_action("apply_color_scheme",
-                        self.show_apply_color_scheme_dialog)
+                        self.show_apply_color_scheme_dialog, ["<primary>Return"])
 
         self.actions.create_action("manage_presets",
-                        self.show_presets_manager)
+                        self.show_presets_manager, ["<primary>m"])
 
         self.actions.create_action("preferences",
-                        self.show_preferences)
+                        self.show_preferences, ["<primary>comma"])
 
         self.actions.create_action("save_preset",
-                        self.show_save_preset_dialog)
+                        self.show_save_preset_dialog, ["<primary>s"])
+
+        self.actions.create_action("quit",
+            self.win.on_close_request, ["<primary>q"])
 
         self.actions.create_action("about",
                         self.show_about_window)