Keymap+WindowServer: Add context menu to keymap applet

Adding a context menu which lists configured keymaps and allows
setting the active keymap

Userland/Applets/Keymap/CMakeLists.txt

@@ -6,6 +6,7 @@ serenity_component(
 
 set(SOURCES
     KeymapStatusWindow.cpp
+    KeymapStatusWidget.cpp
     main.cpp
 )
 

Userland/Applets/Keymap/KeymapStatusWidget.cpp

@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "KeymapStatusWidget.h"
+#include "LibGUI/ActionGroup.h"
+#include <LibGUI/Action.h>
+#include <LibGUI/ConnectionToWindowManagerServer.h>
+#include <LibGUI/Painter.h>
+#include <LibGUI/Process.h>
+#include <LibGfx/Point.h>
+#include <LibKeyboard/CharacterMap.h>
+
+void KeymapStatusWidget::mousedown_event(GUI::MouseEvent& event)
+{
+    Gfx::IntPoint point(event.x(), event.y());
+    MUST(refresh_menu());
+    m_context_menu->popup(point.translated(this->screen_relative_rect().location()));
+}
+
+ErrorOr<void> KeymapStatusWidget::refresh_menu()
+{
+    m_keymaps_group.for_each_action([&](auto& action) {
+        m_keymaps_group.remove_action(action);
+        return IterationDecision::Continue;
+    });
+
+    m_context_menu = GUI::Menu::construct();
+
+    auto mapper_config = TRY(Core::ConfigFile::open("/etc/Keyboard.ini"));
+    auto keymaps_string = mapper_config->read_entry("Mapping", "Keymaps", "");
+    auto keymaps = keymaps_string.split(',');
+
+    for (auto& keymap : keymaps) {
+        auto action = GUI::Action::create_checkable(keymap, [=](auto&) {
+            GUI::ConnectionToWindowManagerServer::the().async_set_keymap(keymap);
+        });
+
+        action->set_checked(keymap == m_current_keymap);
+
+        m_keymaps_group.add_action(action);
+        m_context_menu->add_action(action);
+    }
+
+    m_keymaps_group.set_exclusive(true);
+
+    m_context_menu->add_separator();
+
+    auto settings_icon = TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/settings.png"sv));
+
+    m_context_menu->add_action(GUI::Action::create("&Settings",
+        settings_icon,
+        [&](auto&) {
+            GUI::Process::spawn_or_show_error(window(), "/bin/KeyboardSettings"sv);
+        }));
+
+    return {};
+}
+
+void KeymapStatusWidget::set_current_keymap(String const& keymap, ClearBackground clear_background)
+{
+    if (clear_background == ClearBackground::Yes) {
+        GUI::Painter painter(*this);
+        painter.clear_rect(rect(), Color::Transparent);
+    }
+
+    m_current_keymap = keymap;
+
+    set_tooltip(keymap);
+    set_text(keymap.substring(0, 2));
+}

Userland/Applets/Keymap/KeymapStatusWidget.h

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibCore/FileWatcher.h>
+#include <LibGUI/ActionGroup.h>
+#include <LibGUI/Label.h>
+#include <LibGUI/Menu.h>
+#include <LibGUI/Window.h>
+
+enum class ClearBackground {
+    No,
+    Yes
+};
+
+class KeymapStatusWidget : public GUI::Label {
+    C_OBJECT(KeymapStatusWidget);
+
+    virtual void mousedown_event(GUI::MouseEvent& event) override;
+
+    void set_current_keymap(String const& keymap, ClearBackground clear_background = ClearBackground::Yes);
+
+private:
+    RefPtr<GUI::Menu> m_context_menu;
+    String m_current_keymap;
+
+    ErrorOr<void> refresh_menu();
+
+    GUI::ActionGroup m_keymaps_group;
+};

Userland/Applets/Keymap/KeymapStatusWindow.cpp

@@ -6,19 +6,10 @@
  */
 
 #include "KeymapStatusWindow.h"
-#include <LibGUI/ConnectionToWindowManagerServer.h>
 #include <LibGUI/Painter.h>
 #include <LibGUI/Process.h>
 #include <LibKeyboard/CharacterMap.h>
 
-void KeymapStatusWidget::mousedown_event(GUI::MouseEvent& event)
-{
-    if (event.button() != GUI::MouseButton::Primary)
-        return;
-
-    GUI::Process::spawn_or_show_error(window(), "/bin/KeyboardSettings"sv);
-}
-
 KeymapStatusWindow::KeymapStatusWindow()
 {
     set_window_type(GUI::WindowType::Applet);
@@ -27,8 +18,7 @@ KeymapStatusWindow::KeymapStatusWindow()
 
     auto current_keymap = MUST(Keyboard::CharacterMap::fetch_system_map());
     auto current_keymap_name = current_keymap.character_map_name();
-    m_status_widget->set_tooltip(current_keymap_name);
-    m_status_widget->set_text(current_keymap_name.substring(0, 2));
+    m_status_widget->set_current_keymap(current_keymap_name, ClearBackground::No);
 }
 
 void KeymapStatusWindow::wm_event(GUI::WMEvent& event)
@@ -42,9 +32,5 @@ void KeymapStatusWindow::wm_event(GUI::WMEvent& event)
 
 void KeymapStatusWindow::set_keymap_text(String const& keymap)
 {
-    GUI::Painter painter(*m_status_widget);
-    painter.clear_rect(m_status_widget->rect(), Color::from_argb(0));
-
-    m_status_widget->set_tooltip(keymap);
-    m_status_widget->set_text(keymap.substring(0, 2));
+    m_status_widget->set_current_keymap(keymap);
 }

Userland/Applets/Keymap/KeymapStatusWindow.h

@@ -7,14 +7,10 @@
 
 #pragma once
 
+#include "KeymapStatusWidget.h"
 #include <LibGUI/Label.h>
 #include <LibGUI/Window.h>
 
-class KeymapStatusWidget : public GUI::Label {
-    C_OBJECT(KeymapStatusWidget);
-
-    virtual void mousedown_event(GUI::MouseEvent& event) override;
-};
 class KeymapStatusWindow final : public GUI::Window {
     C_OBJECT(KeymapStatusWindow)
 public: