Merge pull request #1780 from ramox81/codex/ribbon-keytips

Ribbon key tips (Alt): codes on tabs, buttons and menu items

# Conflicts:
#	locales/ar-SA/opencadstudio.ftl
#	locales/bg-BG/opencadstudio.ftl
#	locales/cs-CZ/opencadstudio.ftl
#	locales/de-DE/opencadstudio.ftl
#	locales/el-GR/opencadstudio.ftl
#	locales/en-US/opencadstudio.ftl
#	locales/es-ES/opencadstudio.ftl
#	locales/fi-FI/opencadstudio.ftl
#	locales/fr-FR/opencadstudio.ftl
#	locales/hi-IN/opencadstudio.ftl
#	locales/hu-HU/opencadstudio.ftl
#	locales/it-IT/opencadstudio.ftl
#	locales/ja-JP/opencadstudio.ftl
#	locales/ko-KR/opencadstudio.ftl
#	locales/lo-LA/opencadstudio.ftl
#	locales/nl-NL/opencadstudio.ftl
#	locales/pl-PL/opencadstudio.ftl
#	locales/pt-BR/opencadstudio.ftl
#	locales/ru-RU/opencadstudio.ftl
#	locales/tr-TR/opencadstudio.ftl
#	locales/zh-CN/opencadstudio.ftl
#	locales/zh-TW/opencadstudio.ftl
#	src/app/control/actions.rs

src/app/view/mod.rs

@@ -2261,12 +2261,23 @@ bg={bg_ms:.1}ms n={view_count}"
             iced::widget::Space::new().width(0).height(0).into()
         };
 
+        // Key tips: the hint bar under the dropdowns, the codes above all.
+        let (keytip_bar, keytip_layer): (Element<'_, Message>, Element<'_, Message>) =
+            self.ribbon.keytip_layers().unwrap_or_else(|| {
+                (
+                    iced::widget::Space::new().width(0).height(0).into(),
+                    iced::widget::Space::new().width(0).height(0).into(),
+                )
+            });
+
         let composed = stack![
             main_ui,
+            keytip_bar,
             dropdown_layer,
             qselect_layer,
             snap_override_layer,
             open_progress_layer,
+            keytip_layer,
         ];
 
         // If the Plot Style editor was launched from PLOT, keep the Plot dialog
@@ -2556,9 +2567,18 @@ impl OpenCADStudio {
             event::listen_with(|ev, status, win_id| {
                 use iced::event::Status;
                 match ev {
+                    iced::Event::Mouse(iced::mouse::Event::ButtonPressed(_))
+                        if crate::ui::ribbon::keytips_active() =>
+                    {
+                        crate::ui::ribbon::keytip_pointer_pressed();
+                        Some(Message::KeyTip(crate::ui::ribbon::KeyTipInput::Hide))
+                    }
                     iced::Event::Mouse(iced::mouse::Event::ButtonPressed(
                         iced::mouse::Button::Left,
-                    )) => Some(Message::PropPointerPressed),
+                    )) => {
+                        crate::ui::ribbon::keytip_pointer_pressed();
+                        Some(Message::PropPointerPressed)
+                    }
                     iced::Event::Window(window::Event::CloseRequested) => {
                         Some(Message::WindowCloseRequested(win_id))
                     }
@@ -2571,6 +2591,9 @@ impl OpenCADStudio {
                     iced::Event::Window(window::Event::FileDropped(path)) => {
                         Some(Message::FileDropped(path))
                     }
+                    iced::Event::Keyboard(keyboard::Event::KeyReleased { key, .. }) => {
+                        crate::ui::ribbon::keytip_key_released(&key)
+                    }
                     iced::Event::Keyboard(keyboard::Event::ModifiersChanged(m)) => {
                         // `command()` is Cmd on macOS, Ctrl elsewhere — the
                         // platform multi-select modifier for the layer list.
@@ -2584,8 +2607,14 @@ impl OpenCADStudio {
                         physical_key,
                         modifiers,
                         text,
+                        repeat,
                         ..
                     }) => {
+                        if let Some(keytip) =
+                            crate::ui::ribbon::keytip_key_pressed(&key, modifiers, repeat)
+                        {
+                            return keytip;
+                        }
                         #[cfg(target_arch = "wasm32")]
                         let accel = modifiers.command();
                         // AltGr reaches Windows apps as Ctrl+Alt, and a macOS