feat(ui): add ComboButton widget and integrate into settings

Introduce ComboButton, a button that cycles through options on click.
Used in SettingsUI for fullscreen, V-Sync, and anisotropic filtering.
Adds texture reload support in SettingsScene and makes Button methods
virtual to allow overriding. Also fixes default mouse_enable to true.

include/Cubed/scene/settings_scene.hpp

@@ -29,11 +29,13 @@ public:
     void on_re_enter() override;
     SceneManager& scene_manager();
     SliderVariable& slider_variable();
+    void set_texture_reload(bool reload);
 
 private:
     void save_and_apply();
     SceneManager& m_scene_manager;
     SliderVariable m_slider_variable;
     SettingsUI m_settings_ui;
+    bool m_need_texture_reload = false;
 };
 } // namespace Cubed

include/Cubed/ui/button.hpp

@@ -17,7 +17,7 @@ public:
     Button& operator=(Button&&) = delete;
 
     bool handle_mouse_move_event(const MouseMoveEvent& e) override;
-    bool handle_mouse_button_event(const MouseButtonEvent& e) override;
+    virtual bool handle_mouse_button_event(const MouseButtonEvent& e) override;
     Button& set_scale(float scale);
 
     float width() const override;
@@ -28,7 +28,7 @@ public:
     Button& set_background_image(const std::string& path,
                                  TextureManager& texture_manager);
     Button& set_default_image(TextureManager& texture_manager);
-    Button& set_text(const std::string& text);
+    virtual Button& set_text(const std::string& text);
 
     Button& set_auto_scale(bool auto_scale);
     Button& set_enable(bool enable);
@@ -38,6 +38,13 @@ public:
         return *this;
     }
 
+protected:
+    std::unique_ptr<Image> m_background;
+    std::unique_ptr<Label> m_foreground;
+    bool m_hovered = false;
+    bool m_enable = true;
+    void update_text_scale();
+
 private:
     static constexpr float PADDING = 5.0f;
     static constexpr float DEFAULT_SCALE = 3.0f;
@@ -46,16 +53,12 @@ private:
     static constexpr const char* DEFAULT_BUTTON_IMAGE =
         "texture/ui/button001.png";
     std::function<void()> m_clicked;
-    std::unique_ptr<Image> m_background;
-    std::unique_ptr<Label> m_foreground;
-    bool m_hovered = false;
-    bool m_enable = true;
+
     float m_width = NORMAL_BUTTON_WIDTH;
     float m_height = NORMAL_BUTTON_HEIGHT;
     float m_scale = DEFAULT_SCALE;
     bool m_auto_scale = false;
     void on_render(Renderer& renderer) override;
     void on_update(float dt) override;
-    void update_text_scale();
 };
 } // namespace Cubed

include/Cubed/ui/combo_button.hpp

@@ -0,0 +1,30 @@
+#pragma once
+#include "Cubed/ui/button.hpp"
+
+#include <span>
+namespace Cubed {
+using ComboPair = std::pair<std::string, std::function<void()>>;
+class ComboButton : public Button {
+
+public:
+    ComboButton(const ComboButton&) = delete;
+    ComboButton(ComboButton&&) = delete;
+    ComboButton& operator=(const ComboButton&) = delete;
+    ComboButton& operator=(ComboButton&&) = delete;
+
+    ComboButton(Widget* parent);
+    Button& set_text(const std::string& text) override;
+    bool handle_mouse_button_event(const MouseButtonEvent& e) override;
+    ComboButton& set_combos(std::span<ComboPair> combos);
+    ComboButton& set_index(int index);
+
+private:
+    void update_text();
+
+    std::vector<std::string> m_suffix;
+    std::vector<std::function<void()>> m_funs;
+    std::string m_text;
+    int m_index = 0;
+    int m_sum = 0;
+};
+} // namespace Cubed

include/Cubed/window.hpp

@@ -41,7 +41,7 @@ public:
     void set_imgui_enabled(bool enable);
 
 private:
-    bool m_mouse_enable = false;
+    bool m_mouse_enable = true;
     bool m_imgui_init = false;
     bool m_game_running = false;
     GLFWwindow* m_window;

src/CMakeLists.txt

@@ -76,4 +76,5 @@ target_sources(${PROJECT_NAME}
         ui/slider.cpp
         ui/settings_ui.cpp
         scene/settings_scene.cpp
+        ui/combo_button.cpp
 )

src/scene/settings_scene.cpp

@@ -30,7 +30,13 @@ void SettingsScene::on_enter() {
     m_slider_variable.rendering_distance = config.get(
         "world.rendering_distance", m_slider_variable.rendering_distance);
 }
-void SettingsScene::on_leave() { save_and_apply(); }
+void SettingsScene::on_leave() {
+    save_and_apply();
+
+    if (m_need_texture_reload) {
+        m_scene_manager.app().texture_manager().need_reload();
+    }
+}
 
 void SettingsScene::on_re_enter() {
     auto width = m_scene_manager.app().renderer().window_width();
@@ -56,4 +62,7 @@ void SettingsScene::save_and_apply() {
 
 SceneManager& SettingsScene::scene_manager() { return m_scene_manager; }
 SliderVariable& SettingsScene::slider_variable() { return m_slider_variable; }
+void SettingsScene::set_texture_reload(bool reload) {
+    m_need_texture_reload = reload;
+}
 } // namespace Cubed

src/ui/combo_button.cpp

@@ -0,0 +1,55 @@
+#include "Cubed/ui/combo_button.hpp"
+
+namespace Cubed {
+ComboButton::ComboButton(Widget* parent) : Button(parent) {}
+
+Button& ComboButton::set_text(const std::string& text) {
+    m_text = text;
+    update_text();
+    return *this;
+}
+bool ComboButton::handle_mouse_button_event(const MouseButtonEvent& e) {
+    if (e.action == KeyAction::PRESS && e.key == MouseKey::LEFT_BUTTON) {
+        if (m_hovered && m_enable) {
+            m_index = (m_index + 1) % m_sum;
+            update_text();
+            if (m_funs[m_index]) {
+                m_funs[m_index]();
+            } else {
+                Logger::error("Function {} is null", m_index);
+            }
+            return true;
+        }
+    }
+
+    return Widget::handle_mouse_button_event(e);
+}
+ComboButton& ComboButton::set_combos(
+    std::span<std::pair<std::string, std::function<void()>>> combos) {
+    m_funs.clear();
+    m_suffix.clear();
+    m_sum = combos.size();
+    for (auto& pair : combos) {
+        m_suffix.push_back(pair.first);
+        m_funs.push_back(pair.second);
+    }
+    update_text();
+    return *this;
+}
+
+ComboButton& ComboButton::set_index(int index) {
+    m_index = index;
+    update_text();
+    return *this;
+}
+
+void ComboButton::update_text() {
+    if (m_suffix.empty()) {
+        return;
+    }
+    auto text = m_text + ": " + m_suffix[m_index];
+    m_foreground->set_text(text);
+    update_text_scale();
+}
+
+} // namespace Cubed

src/ui/settings_ui.cpp

@@ -6,6 +6,7 @@
 #include "Cubed/scene/settings_scene.hpp"
 #include "Cubed/ui/button.hpp"
 #include "Cubed/ui/column_layout.hpp"
+#include "Cubed/ui/combo_button.hpp"
 #include "Cubed/ui/image.hpp"
 #include "Cubed/ui/slider.hpp"
 namespace Cubed {
@@ -63,7 +64,86 @@ void SettingsUI::init() {
         set_default_slider_image(sfx);
         sfx.set_text("SFX");
     }
+    auto& config = m_scene.scene_manager().app().config();
+    {
 
+        bool full = config.get("window.fullscreen", false);
+        auto& fullscreen = layout.add_child<ComboButton>();
+        fullscreen.set_index(!full ? 0 : 1);
+        fullscreen.set_text("Fullscreen");
+        std::vector<std::pair<std::string, std::function<void()>>> comb;
+        comb.emplace_back("off", [&config, this]() {
+            config.set("window.fullscreen", false);
+            m_scene.scene_manager().app().window().reload_config();
+        });
+        comb.emplace_back("on", [&config, this]() {
+            config.set("window.fullscreen", true);
+            m_scene.scene_manager().app().window().reload_config();
+        });
+        fullscreen.set_default_image(texture_manager);
+        fullscreen.set_combos(comb);
+    }
+
+    {
+        bool enable_vsync = config.get("window.V-Sync", true);
+        auto& vsync = layout.add_child<ComboButton>();
+        vsync.set_default_image(texture_manager);
+        vsync.set_text("V-Sync");
+        std::vector<ComboPair> combos;
+        combos.emplace_back("off", [this, &config]() {
+            config.set("window.V-Sync", false);
+            m_scene.scene_manager().app().window().reload_config();
+        });
+        combos.emplace_back("on", [this, &config]() {
+            config.set("window.V-Sync", true);
+            m_scene.scene_manager().app().window().reload_config();
+        });
+
+        vsync.set_combos(combos);
+        vsync.set_index(!enable_vsync ? 0 : 1);
+    }
+    {
+        int max_aniso = texture_manager.max_aniso();
+        int config_aniso = config.get("texture.aniso", 1);
+        int aniso = (config_aniso > max_aniso) ? max_aniso : config_aniso;
+        int max_sum = 1;
+        for (int temp = max_aniso; temp > 1; temp /= 2) {
+            ++max_sum;
+        }
+
+        int cur_index = 0;
+        for (int i = 0, temp = 1; i < max_sum; i++) {
+            if (temp == aniso) {
+                cur_index = i;
+            }
+            temp *= 2;
+        }
+
+        auto& aniso_button = layout.add_child<ComboButton>();
+        aniso_button.set_default_image(texture_manager);
+        aniso_button.set_text("Aniso");
+        aniso_button.set_index(cur_index);
+        std::vector<ComboPair> combos;
+        auto get_suffix = [](int i) -> std::pair<std::string, int> {
+            if (i == 0) {
+                return {"off", 1};
+            }
+            int n = 1;
+            for (int j = 0; j < i; j++) {
+                n *= 2;
+            }
+
+            return {std::to_string(n) + "x", n};
+        };
+        for (int i = 0; i < max_sum; i++) {
+            auto [str, n] = get_suffix(i);
+            combos.emplace_back(str, [&config, this, n]() {
+                config.set("texture.aniso", n);
+                m_scene.set_texture_reload(true);
+            });
+        }
+        aniso_button.set_combos(combos);
+    }
     auto& return_button = layout.add_child<Button>();
     return_button.set_background_image("texture/ui/button001.png",
                                        texture_manager);