KeyboardMapper: Add support for dynamic keyboard visualization

Userland/Applications/KeyboardMapper/KeyboardMapperWidget.cpp

@@ -199,6 +199,10 @@ void KeyboardMapperWidget::keydown_event(GUI::KeyEvent& event)
         tmp_button->update();
         break;
     }
+
+    if (m_automatic_modifier && event.modifiers() > 0) {
+        update_modifier_radio_buttons(event);
+    }
 }
 
 void KeyboardMapperWidget::keyup_event(GUI::KeyEvent& event)
@@ -211,6 +215,10 @@ void KeyboardMapperWidget::keyup_event(GUI::KeyEvent& event)
         tmp_button->update();
         break;
     }
+
+    if (m_automatic_modifier) {
+        update_modifier_radio_buttons(event);
+    }
 }
 
 void KeyboardMapperWidget::set_current_map(const String current_map)
@@ -247,3 +255,27 @@ void KeyboardMapperWidget::show_error_to_user(Error error)
 {
     GUI::MessageBox::show_error(window(), error.string_literal());
 }
+
+void KeyboardMapperWidget::set_automatic_modifier(bool checked)
+{
+    m_automatic_modifier = checked;
+}
+
+void KeyboardMapperWidget::update_modifier_radio_buttons(GUI::KeyEvent& event)
+{
+    GUI::RadioButton* radio_button;
+    if (event.shift() && event.altgr()) {
+        radio_button = m_map_group->find_child_of_type_named<GUI::RadioButton>("shift_altgr_map");
+    } else if (event.altgr()) {
+        radio_button = m_map_group->find_child_of_type_named<GUI::RadioButton>("altgr_map");
+    } else if (event.alt()) {
+        radio_button = m_map_group->find_child_of_type_named<GUI::RadioButton>("alt_map");
+    } else if (event.shift()) {
+        radio_button = m_map_group->find_child_of_type_named<GUI::RadioButton>("shift_map");
+    } else {
+        radio_button = m_map_group->find_child_of_type_named<GUI::RadioButton>("map");
+    }
+
+    if (radio_button)
+        radio_button->set_checked(true);
+}

Userland/Applications/KeyboardMapper/KeyboardMapperWidget.h

@@ -22,6 +22,7 @@ public:
     ErrorOr<void> save();
     ErrorOr<void> save_to_file(StringView);
     void show_error_to_user(Error);
+    void set_automatic_modifier(bool checked);
 
 protected:
     virtual void keydown_event(GUI::KeyEvent&) override;
@@ -37,9 +38,11 @@ private:
     RefPtr<GUI::Widget> m_map_group;
     void add_map_radio_button(const StringView map_name, const StringView button_text);
     u32* map_from_name(const StringView map_name);
+    void update_modifier_radio_buttons(GUI::KeyEvent&);
 
     String m_filename;
     Keyboard::CharacterMapData m_character_map;
     String m_current_map_name;
     bool m_modified { false };
+    bool m_automatic_modifier { false };
 };

Userland/Applications/KeyboardMapper/main.cpp

@@ -80,6 +80,13 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
             app->quit();
         });
 
+    auto auto_modifier_action = GUI::Action::create("Auto Modifier", [&](auto& act) {
+        keyboard_mapper_widget->set_automatic_modifier(act.is_checked());
+    });
+    auto_modifier_action->set_status_tip("Toggle automatic modifier");
+    auto_modifier_action->set_checkable(true);
+    auto_modifier_action->set_checked(false);
+
     auto& file_menu = window->add_menu("&File");
     file_menu.add_action(open_action);
     file_menu.add_action(save_action);
@@ -87,6 +94,9 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     file_menu.add_separator();
     file_menu.add_action(quit_action);
 
+    auto& settings_menu = window->add_menu("&Settings");
+    settings_menu.add_action(auto_modifier_action);
+
     auto& help_menu = window->add_menu("&Help");
     help_menu.add_action(GUI::CommonActions::make_about_action("Keyboard Mapper", app_icon, window));