C++抽象工厂模式 多系列产品族创建

#include <iostream>
#include <memory>

// 抽象产品：按钮
struct Button {
    virtual ~Button() = default;
    virtual void render() = 0;
};

// 抽象产品：文本框
struct TextBox {
    virtual ~TextBox() = default;
    virtual void input() = 0;
};

// Windows 风格产品
struct WinButton : Button {
    void render() override {
        std::cout << "渲染 Windows 按钮\n";
    }
};

struct WinTextBox : TextBox {
    void input() override {
        std::cout << "Windows 文本框输入\n";
    }
};

// Mac 风格产品
struct MacButton : Button {
    void render() override {
        std::cout << "渲染 Mac 按钮\n";
    }
};

struct MacTextBox : TextBox {
    void input() override {
        std::cout << "Mac 文本框输入\n";
    }
};

// 抽象工厂
struct GUIFactory {
    virtual std::unique_ptr<Button> createButton() = 0;
    virtual std::unique_ptr<TextBox> createTextBox() = 0;
    virtual ~GUIFactory() = default;
};

// Windows 工厂
struct WinFactory : GUIFactory {
    std::unique_ptr<Button> createButton() override {
        return std::make_unique<WinButton>();
    }
    std::unique_ptr<TextBox> createTextBox() override {
        return std::make_unique<WinTextBox>();
    }
};

// Mac 工厂
struct MacFactory : GUIFactory {
    std::unique_ptr<Button> createButton() override {
        return std::make_unique<MacButton>();
    }
    std::unique_ptr<TextBox> createTextBox() override {
        return std::make_unique<MacTextBox>();
    }
};

void createUI(std::unique_ptr<GUIFactory> factory) {
    auto button = factory->createButton();
    auto textbox = factory->createTextBox();

    button->render();
    textbox->input();
}

int main() {
    // 使用 Windows 风格
    createUI(std::make_unique<WinFactory>());

    // 使用 Mac 风格
    createUI(std::make_unique<MacFactory>());

    return 0;
}