DisplaySettings: Add an Effects tab

Effects tab provides the UI for setting SystemEffects.
DisplaySettings is getting a bit crowded and might need a re-org
at some point, but this seems like a good home for effects while
the settings mature.

Userland/Applications/DisplaySettings/EffectsSettingsWidget.cpp

@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2022, the SerenityOS developers.
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "EffectsSettingsWidget.h"
+#include <Applications/DisplaySettings/EffectsSettingsGML.h>
+#include <LibCore/ConfigFile.h>
+#include <LibGUI/CheckBox.h>
+#include <LibGUI/ComboBox.h>
+#include <LibGUI/ConnectionToWindowServer.h>
+#include <LibGUI/ItemListModel.h>
+
+namespace GUI {
+
+namespace DisplaySettings {
+
+EffectsSettingsWidget::EffectsSettingsWidget()
+{
+    load_from_gml(effects_settings_gml);
+
+    m_geometry_combobox = find_descendant_of_type_named<ComboBox>("geometry_combobox");
+    m_geometry_combobox->set_only_allow_values_from_model(true);
+    m_geometry_combobox->on_change = [this](auto&, auto&) {
+        m_system_effects.set_geometry(static_cast<ShowGeometry>(m_geometry_combobox->selected_index()));
+        set_modified(true);
+    };
+
+    if (auto result = load_settings(); result.is_error()) {
+        warnln("Failed to load [Effects] from WindowServer.ini");
+        return;
+    }
+
+    auto& animate_menus = *find_descendant_of_type_named<GUI::CheckBox>("animate_menus_checkbox");
+    animate_menus.set_checked(m_system_effects.animate_menus());
+    animate_menus.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::AnimateMenus) = checked;
+        set_modified(true);
+    };
+    auto& flash_menus = *find_descendant_of_type_named<GUI::CheckBox>("flash_menus_checkbox");
+    flash_menus.set_checked(m_system_effects.flash_menus());
+    flash_menus.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::FlashMenus) = checked;
+        set_modified(true);
+    };
+    auto& animate_windows = *find_descendant_of_type_named<GUI::CheckBox>("animate_windows_checkbox");
+    animate_windows.set_checked(m_system_effects.animate_windows());
+    animate_windows.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::AnimateWindows) = checked;
+        set_modified(true);
+    };
+    auto& smooth_scrolling = *find_descendant_of_type_named<GUI::CheckBox>("smooth_scrolling_checkbox");
+    smooth_scrolling.set_checked(m_system_effects.smooth_scrolling());
+    smooth_scrolling.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::SmoothScrolling) = checked;
+        set_modified(true);
+    };
+    auto& tab_accents = *find_descendant_of_type_named<GUI::CheckBox>("tab_accents_checkbox");
+    tab_accents.set_checked(m_system_effects.tab_accents());
+    tab_accents.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::TabAccents) = checked;
+        set_modified(true);
+    };
+    auto& splitter_knurls = *find_descendant_of_type_named<GUI::CheckBox>("splitter_knurls_checkbox");
+    splitter_knurls.set_checked(m_system_effects.splitter_knurls());
+    splitter_knurls.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::SplitterKnurls) = checked;
+        set_modified(true);
+    };
+    auto& menu_shadow = *find_descendant_of_type_named<GUI::CheckBox>("menu_shadow_checkbox");
+    menu_shadow.set_checked(m_system_effects.menu_shadow());
+    menu_shadow.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::MenuShadow) = checked;
+        set_modified(true);
+    };
+    auto& window_shadow = *find_descendant_of_type_named<GUI::CheckBox>("window_shadow_checkbox");
+    window_shadow.set_checked(m_system_effects.window_shadow());
+    window_shadow.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::WindowShadow) = checked;
+        set_modified(true);
+    };
+    auto& tooltip_shadow = *find_descendant_of_type_named<GUI::CheckBox>("tooltip_shadow_checkbox");
+    tooltip_shadow.set_checked(m_system_effects.tooltip_shadow());
+    tooltip_shadow.on_checked = [this](bool checked) {
+        m_system_effects.effects().at(Effects::TooltipShadow) = checked;
+        set_modified(true);
+    };
+}
+
+ErrorOr<void> EffectsSettingsWidget::load_settings()
+{
+    auto ws_config = TRY(Core::ConfigFile::open("/etc/WindowServer.ini"));
+    Vector<bool> effects = {
+        ws_config->read_bool_entry("Effects", "AnimateMenus", true),
+        ws_config->read_bool_entry("Effects", "FlashMenus", true),
+        ws_config->read_bool_entry("Effects", "AnimateWindows", true),
+        ws_config->read_bool_entry("Effects", "SmoothScrolling", true),
+        ws_config->read_bool_entry("Effects", "TabAccents", true),
+        ws_config->read_bool_entry("Effects", "SplitterKnurls", true),
+        ws_config->read_bool_entry("Effects", "MenuShadow", true),
+        ws_config->read_bool_entry("Effects", "WindowShadow", true),
+        ws_config->read_bool_entry("Effects", "TooltipShadow", true),
+    };
+    auto geometry = WindowServer::ShowGeometryTools::string_to_enum(ws_config->read_entry("Effects", "ShowGeometry", "OnMoveAndResize"));
+    m_system_effects = { effects, geometry };
+
+    static constexpr Array list = {
+        "On Move and Resize"sv,
+        "On Move only"sv,
+        "On Resize only"sv,
+        "Never"sv
+    };
+    for (size_t i = 0; i < list.size(); ++i)
+        TRY(m_geometry_list.try_append(list[i]));
+    m_geometry_combobox->set_model(ItemListModel<String>::create(m_geometry_list));
+    m_geometry_combobox->set_selected_index(m_system_effects.geometry());
+
+    return {};
+}
+
+void EffectsSettingsWidget::apply_settings()
+{
+    ConnectionToWindowServer::the().async_set_system_effects(m_system_effects.effects(), m_system_effects.geometry());
+}
+
+}
+
+}