完成按钮及可交互UI元素

CMakeLists.txt

@@ -62,9 +62,14 @@ add_executable(${TARGET}
                 src/engine/scene/level_loader.cpp
                 src/engine/ui/ui_manager.cpp
                 src/engine/ui/ui_element.cpp
+                src/engine/ui/ui_interactive.cpp
                 src/engine/ui/ui_panel.cpp
                 src/engine/ui/ui_image.cpp
                 src/engine/ui/ui_label.cpp
+                src/engine/ui/ui_button.cpp
+                src/engine/ui/state/ui_normal_state.cpp
+                src/engine/ui/state/ui_pressed_state.cpp
+                src/engine/ui/state/ui_hover_state.cpp
                 src/game/scene/game_scene.cpp
                 src/game/component/player_component.cpp
                 src/game/component/ai_component.cpp

src/engine/ui/state/ui_hover_state.cpp

@@ -0,0 +1,30 @@
+#include "ui_hover_state.h"
+#include "ui_normal_state.h"
+#include "ui_pressed_state.h"
+#include "../ui_interactive.h"
+#include "../../input/input_manager.h"
+#include "../../core/context.h"
+#include <spdlog/spdlog.h>
+
+namespace engine::ui::state {
+
+void UIHoverState::enter()
+{
+    owner_->setSprite("hover");
+    spdlog::debug("切换到悬停状态");
+}
+
+std::unique_ptr<UIState> UIHoverState::handleInput(engine::core::Context& context)
+{
+    auto& input_manager = context.getInputManager();
+    auto mouse_pos = input_manager.getLogicalMousePosition();
+    if (!owner_->isPointInside(mouse_pos)) {                // 如果鼠标不在UI元素内，则返回正常状态
+        return std::make_unique<UINormalState>(owner_);
+    }
+    if (input_manager.isActionPressed("MouseLeftClick")) {  // 如果鼠标按下，则返回按下状态
+        return std::make_unique<UIPressedState>(owner_);
+    }
+    return nullptr;
+}
+
+} // namespace engine::ui::state

src/engine/ui/state/ui_hover_state.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "ui_state.h"
+
+namespace engine::ui::state {
+
+/**
+ * @brief 悬停状态
+ *
+ * 当鼠标悬停在UI元素上时，会切换到该状态。
+ */
+class UIHoverState final: public UIState {
+    friend class engine::ui::UIInteractive;
+public:
+    UIHoverState(engine::ui::UIInteractive* owner) : UIState(owner) {}
+    ~UIHoverState() override = default;
+
+private:
+    void enter() override;
+    std::unique_ptr<UIState> handleInput(engine::core::Context& context) override;
+};
+
+} // namespace engine::ui::state

src/engine/ui/state/ui_normal_state.cpp

@@ -0,0 +1,28 @@
+#include "ui_normal_state.h"
+#include "ui_hover_state.h"
+#include "../ui_interactive.h"
+#include "../../input/input_manager.h"
+#include "../../core/context.h"
+#include "../../audio/audio_player.h"
+#include <spdlog/spdlog.h>
+
+namespace engine::ui::state {
+
+void UINormalState::enter()
+{
+    owner_->setSprite("normal");
+    spdlog::debug("切换到正常状态");
+}
+
+std::unique_ptr<UIState> UINormalState::handleInput(engine::core::Context& context)
+{
+    auto& input_manager = context.getInputManager();
+    auto mouse_pos = input_manager.getLogicalMousePosition();
+    if (owner_->isPointInside(mouse_pos)) {         // 如果鼠标在UI元素内，则切换到悬停状态
+        owner_->playSound("hover");
+        return std::make_unique<engine::ui::state::UIHoverState>(owner_);
+    }
+    return nullptr;
+}
+
+} // namespace engine::ui::state

src/engine/ui/state/ui_normal_state.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "ui_state.h"
+
+namespace engine::ui::state {
+
+/**
+ * @brief 正常状态
+ *
+ * 正常状态是UI元素的默认状态。
+ */
+class UINormalState final: public UIState {
+    friend class engine::ui::UIInteractive;
+public:
+    UINormalState(engine::ui::UIInteractive* owner) : UIState(owner) {}
+    ~UINormalState() override = default;
+
+private:
+    void enter() override;
+    std::unique_ptr<UIState> handleInput(engine::core::Context& context) override;
+};
+
+} // namespace engine::ui::state

src/engine/ui/state/ui_pressed_state.cpp

@@ -0,0 +1,34 @@
+#include "ui_pressed_state.h"
+#include "ui_normal_state.h"
+#include "ui_hover_state.h"
+#include "../ui_interactive.h"
+#include "../../input/input_manager.h"
+#include "../../core/context.h"
+#include <spdlog/spdlog.h>
+
+namespace engine::ui::state {
+
+void UIPressedState::enter()
+{
+    owner_->setSprite("pressed");
+    owner_->playSound("pressed");
+    spdlog::debug("切换到按下状态");
+}
+
+std::unique_ptr<UIState> UIPressedState::handleInput(engine::core::Context& context)
+{
+    auto& input_manager = context.getInputManager();
+    auto mouse_pos = input_manager.getLogicalMousePosition();
+    if (input_manager.isActionReleased("MouseLeftClick")) {
+        if (!owner_->isPointInside(mouse_pos)) {        // 松开鼠标时，如果不在UI元素内，则切换到正常状态
+            return std::make_unique<engine::ui::state::UINormalState>(owner_);
+        } else {                                        // 松开鼠标时，如果还在UI元素内，则触发点击事件
+            owner_->clicked();
+            return std::make_unique<engine::ui::state::UIHoverState>(owner_);
+        }
+    }
+
+    return nullptr;
+}
+
+} // namespace engine::ui::state

src/engine/ui/state/ui_pressed_state.h

@@ -0,0 +1,22 @@
+#pragma once
+#include "ui_state.h"
+
+namespace engine::ui::state {
+
+/**
+ * @brief 按下状态
+ *
+ * 当鼠标按下UI元素时，会切换到该状态。
+ */
+class UIPressedState final: public UIState {
+    friend class engine::ui::UIInteractive;
+public:
+    UIPressedState(engine::ui::UIInteractive* owner) : UIState(owner) {}
+    ~UIPressedState() override = default;
+
+private:
+    void enter() override;
+    std::unique_ptr<UIState> handleInput(engine::core::Context& context) override;
+};
+
+} // namespace engine::ui::state

src/engine/ui/state/ui_state.h

@@ -0,0 +1,44 @@
+#pragma once
+#include <memory>
+
+namespace engine::core {
+    class Context;
+}
+
+namespace engine::ui {
+    class UIInteractive;
+}
+
+namespace engine::ui::state {
+
+/**
+ * @brief 可交互UI元素在特定状态下的行为接口。
+ *
+ * 该接口定义了所有具体UI状态必须实现的通用操作，
+ * 例如处理输入事件、更新状态逻辑以及确定视觉表现。
+ */
+class UIState {
+    friend class engine::ui::UIInteractive;
+protected:
+    engine::ui::UIInteractive* owner_ = nullptr;    ///< @brief 指向父节点
+
+public:
+    /**
+     * @brief 构造函数传入父节点指针
+     */
+    UIState(engine::ui::UIInteractive* owner) : owner_(owner) {}
+    virtual ~UIState() = default;
+
+    // 删除拷贝和移动构造函数/赋值运算符
+    UIState(const UIState&) = delete;
+    UIState& operator=(const UIState&) = delete;
+    UIState(UIState&&) = delete;
+    UIState& operator=(UIState&&) = delete;
+
+protected:
+    // --- 核心方法 --- 
+    virtual void enter() {}
+    virtual std::unique_ptr<UIState> handleInput(engine::core::Context& context) = 0;
+};
+
+} // namespace engine::ui::state

src/engine/ui/ui_button.cpp

@@ -0,0 +1,33 @@
+#include "ui_button.h"
+#include "state/ui_normal_state.h"
+#include <spdlog/spdlog.h>
+
+namespace engine::ui {
+UIButton::UIButton(engine::core::Context& context,
+                   const std::string &normal_sprite_id, 
+                   const std::string &hover_sprite_id, 
+                   const std::string &pressed_sprite_id, 
+                   const glm::vec2 &position, 
+                   const glm::vec2 &size, 
+                   std::function<void()> callback)
+    : UIInteractive(context, position, size), callback_(std::move(callback))
+{
+    addSprite("normal", std::make_unique<engine::render::Sprite>(normal_sprite_id));
+    addSprite("hover", std::make_unique<engine::render::Sprite>(hover_sprite_id));
+    addSprite("pressed", std::make_unique<engine::render::Sprite>(pressed_sprite_id));
+
+    // 设置默认状态为"normal"
+    setState(std::make_unique<engine::ui::state::UINormalState>(this));
+
+    // 设置默认音效
+    addSound("hover", "assets/audio/button_hover.wav");
+    addSound("pressed", "assets/audio/button_click.wav");
+    spdlog::trace("UIButton 构造完成");
+}
+
+void UIButton::clicked()
+{
+    if (callback_) callback_();
+}
+
+} // namespace engine::ui

src/engine/ui/ui_button.h

@@ -0,0 +1,45 @@
+#pragma once
+#include "ui_interactive.h"
+#include <functional>
+#include <utility>
+
+namespace engine::ui {
+
+/**
+ * @brief 按钮UI元素
+ * 
+ * 继承自UIInteractive，用于创建可交互的按钮。
+ * 支持三种状态：正常、悬停、按下。
+ * 支持回调函数，当按钮被点击时调用。
+ */
+class UIButton final: public UIInteractive {
+private:
+    std::function<void()> callback_;        ///< @brief 可自定义的函数（函数包装器）
+
+public:
+    /**
+     * @brief 构造函数
+     * @param normal_sprite_id 正常状态的精灵ID
+     * @param hover_sprite_id 悬停状态的精灵ID
+     * @param pressed_sprite_id 按下状态的精灵ID
+     * @param position 位置
+     * @param size 大小
+     * @param callback 回调函数
+     */
+    UIButton(engine::core::Context& context,
+             const std::string& normal_sprite_id,
+             const std::string& hover_sprite_id,
+             const std::string& pressed_sprite_id,
+             const glm::vec2& position = {0.0f, 0.0f}, 
+             const glm::vec2& size = {0.0f, 0.0f}, 
+             std::function<void()> callback = nullptr);
+    ~UIButton() override = default;
+
+    void clicked() override;     ///< @brief 重写基类方法，当按钮被点击时调用回调函数
+
+    void setCallback(std::function<void()> callback) { callback_ = std::move(callback); }   ///< @brief 设置点击回调函数
+    std::function<void()> getCallback() const { return callback_; }                         ///< @brief 获取点击回调函数
+
+};
+
+} // namespace engine::ui

src/engine/ui/ui_interactive.cpp

@@ -0,0 +1,90 @@
+#include "ui_interactive.h"
+#include "state/ui_state.h"
+#include "../core/context.h"
+#include "../render/renderer.h"
+#include "../resource/resource_manager.h"
+#include "../audio/audio_player.h"
+#include <spdlog/spdlog.h>
+
+namespace engine::ui {
+
+UIInteractive::~UIInteractive() = default;
+
+UIInteractive::UIInteractive(engine::core::Context &context, const glm::vec2 &position, const glm::vec2 &size)
+    : UIElement(position, size), context_(context)
+{
+    spdlog::trace("UIInteractive 构造完成");
+}
+
+void UIInteractive::setState(std::unique_ptr<engine::ui::state::UIState> state)
+{
+    if (!state) {
+        spdlog::warn("尝试设置空的状态！");
+        return;
+    }
+
+    state_ = std::move(state);
+    state_->enter();
+}
+
+void UIInteractive::addSprite(const std::string &name, std::unique_ptr<engine::render::Sprite> sprite)
+{
+    // 可交互UI元素必须有一个size用于交互检测，因此如果参数列表中没有指定，则用图片大小作为size
+    if (size_.x == 0.0f && size_.y == 0.0f) {
+        size_ = context_.getResourceManager().getTextureSize(sprite->getTextureId());
+    }
+    // 添加精灵
+    sprites_[name] = std::move(sprite);
+}
+
+void UIInteractive::setSprite(const std::string &name)
+{
+    if (sprites_.find(name) != sprites_.end()) {
+        current_sprite_ = sprites_[name].get();
+    } else {
+        spdlog::warn("Sprite '{}' 未找到", name);
+    }
+}
+
+void UIInteractive::addSound(const std::string &name, const std::string &path)
+{
+    sounds_[name] = path;
+}
+
+void UIInteractive::playSound(const std::string &name)
+{
+    if (sounds_.find(name) != sounds_.end()) {
+        context_.getAudioPlayer().playSound(sounds_[name]);
+    } else {
+        spdlog::error("Sound '{}' 未找到", name);
+    }
+}
+
+bool UIInteractive::handleInput(engine::core::Context &context)
+{
+    if (UIElement::handleInput(context)) {  
+        return true;
+    }
+
+    // 先更新子节点，再更新自己（状态）
+    if (state_ && interactive_) {
+        if (auto next_state = state_->handleInput(context); next_state) {
+            setState(std::move(next_state));
+            return true;
+        }
+    }
+    return false;
+}
+
+void UIInteractive::render(engine::core::Context &context)
+{
+    if (!visible_ ) return;
+
+    // 先渲染自身
+    context.getRenderer().drawUISprite(*current_sprite_, getScreenPosition(), size_);
+
+    // 再渲染子元素（调用基类方法）
+    UIElement::render(context);
+}
+
+} // namespace engine::ui

src/engine/ui/ui_interactive.h

@@ -0,0 +1,53 @@
+#pragma once
+#include "ui_element.h"
+#include "state/ui_state.h"
+#include "../render/sprite.h"   // 需要引入头文件而不是前置声明（map容器创建时可能会检查内部元素是否有析构定义）
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+namespace engine::core {
+    class Context;
+}
+
+namespace engine::ui {
+
+/**
+ * @brief 可交互UI元素的基类,继承自UIElement
+ *
+ * 定义了可交互UI元素的通用属性和行为。
+ * 管理UI状态的切换和交互逻辑。
+ * 提供事件处理、更新和渲染的虚方法。
+ */
+class UIInteractive : public UIElement {
+protected:
+    engine::core::Context& context_;                        ///< @brief 可交互元素很可能需要其他引擎组件
+    std::unique_ptr<engine::ui::state::UIState> state_;     ///< @brief 当前状态
+    std::unordered_map<std::string, std::unique_ptr<engine::render::Sprite>> sprites_; ///< @brief 精灵集合
+    std::unordered_map<std::string, std::string> sounds_;   ///< @brief 音效集合，key为音效名称，value为音效文件路径
+    engine::render::Sprite* current_sprite_ = nullptr;      ///< @brief 当前显示的精灵
+    bool interactive_ = true;                               ///< @brief 是否可交互
+
+public:
+    UIInteractive(engine::core::Context& context, const glm::vec2& position = {0.0f, 0.0f}, const glm::vec2& size = {0.0f, 0.0f});
+    ~UIInteractive() override;
+
+    virtual void clicked() {}       ///< @brief 如果有点击事件，则重写该方法
+
+    void addSprite(const std::string& name, std::unique_ptr<engine::render::Sprite> sprite);///< @brief 添加精灵
+    void setSprite(const std::string& name);                                                ///< @brief 设置当前显示的精灵
+    void addSound(const std::string& name, const std::string& path);                        ///< @brief 添加音效
+    void playSound(const std::string& name);                                                ///< @brief 播放音效
+    // --- Getters and Setters ---
+    void setState(std::unique_ptr<engine::ui::state::UIState> state);       ///< @brief 设置当前状态
+    engine::ui::state::UIState* getState() const { return state_.get(); }   ///< @brief 获取当前状态
+
+    void setInteractive(bool interactive) { interactive_ = interactive; }   ///< @brief 设置是否可交互
+    bool isInteractive() const { return interactive_; }                     ///< @brief 获取是否可交互
+
+    // --- 核心方法 ---
+    bool handleInput(engine::core::Context& context) override;
+    void render(engine::core::Context& context) override;
+};
+
+} // namespace engine::ui

src/game/scene/game_scene.cpp

@@ -21,6 +21,7 @@
 #include "../../engine/ui/ui_panel.h"
 #include "../../engine/ui/ui_label.h"
 #include "../../engine/ui/ui_image.h"
+#include "../../engine/ui/ui_button.h"
 #include "../../engine/utils/math.h"
 #include "../component/ai_component.h"
 #include "../component/ai/patrol_behavior.h"
@@ -202,6 +203,7 @@ bool GameScene::initUI()
     
     createScoreUI();
     createHealthUI();
+    createTestButton();
     return true;
 }
 
@@ -447,4 +449,21 @@ void GameScene::healWithUI(int amount)
     updateHealthWithUI();                              // 更新生命值与UI
 }
 
+void GameScene::createTestButton()
+{
+    auto test_button = std::make_unique<engine::ui::UIButton>(context_,
+                                                              "assets/textures/UI/buttons/Start1.png",
+                                                              "assets/textures/UI/buttons/Start2.png",
+                                                              "assets/textures/UI/buttons/Start3.png",
+                                                              glm::vec2(100.0f, 100.0f),
+                                                              glm::vec2(0.0f),      // 采用图片大小
+                                                              [this](){ this->testButtonClicked(); });
+    ui_manager_->addElement(std::move(test_button));
+}
+
+void GameScene::testButtonClicked()
+{
+    spdlog::info("测试按钮被点击");
+}
+
 } // namespace game::scene 

src/game/scene/game_scene.h

@@ -72,6 +72,10 @@ private:
     void healWithUI(int amount);                    ///< @brief 增加生命，同时更新UI
     void updateHealthWithUI();                      ///< @brief 更新生命值UI (只适用最大生命值不变的情况)
 
+    // --- 测试函数 ---
+    void createTestButton();                       ///< @brief 创建测试按钮
+    void testButtonClicked();                      ///< @brief 测试按钮点击事件
+
 };
 
 } // namespace game::scene