架构师训练营 Week 03 作业

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发布于: 2020 年 06 月 24 日

1 线程安全的单例实现
2 用组合设计模式编写程序用组合设计模式编写程序，打印输出图 1 的窗口，窗口组件的树结构如图 2 所示，打印输出示例参考图 3。
2.1 类图
Component类是窗口组件抽象类，包含组件共有的属性；
Container类是组件容器类，负责储存子部件，
2.2 实现2.2.1 组件接口Component类：
class Component {
protected:
  // fields
public:
  virtual void print() = 0;
};
2.2.2 子控件2.2.2.1 图片控件
class Picture : public Component {
protected:
  string uri;
  string name;
 public:
  Picture(const string& uri, const string& name)
    : uri(uri)
    , name(name)
  { }
  void print() override {
    cout << "print Picture(" << name << ")" << endl;
  }
};
2.2.2.2 按钮控件
class Button : public Component {
protected:
  string text;
 public:
  Button(const string& text)
    : text(text)
  { }
  void print() override {
    cout << "print Button(" << text << ")" << endl;
  }
};
2.2.2.3 标签控件
class Label : public Component {
protected:
  string text;
 public:
  Label(const string& text)
    : text(text)
  { }
  void print() override {
    cout << "print Label(" << text << ")" << endl;
  }
};
2.2.2.4 链接标签
class LinkLabel : public Component {
protected:
  string text;
  string link;
 public:
  LinkLabel(const string& text, const string& link)
    : text(text)
    , link(link)
  { }
  void print() override {
    cout << "print LinkLabel(" << text << ")" << endl;
  }
};
2.2.2.5 文本输入框
class TextBox : public Component {
protected:
  string name;
  string text;
public:
  TextBox(const string& name)
    : name(name)
  { }
  void print() override {
    cout << "print TextBox(" << name << ")" << endl;
  }
};
2.2.2.6 密码输入框
class PasswordBox : public TextBox {
public:
  PasswordBox(const string& name)
    : TextBox(name)
  { }
  void print() override {
    cout << "print PasswordBox(" << name << ")" << endl;
  }
};
2.2.2.7 复选框
class CheckBox : public Component {
protected:
  string text;
public:
  CheckBox(const string& text)
    : text(text)
  { }
  void print() override {
    cout << "print CheckBox(" << text << endl;
  }
};
2.2.3 组件容器
class Container : public Component {
protected:
  list<shared_ptr<Component>> children;
public:
  void add(shared_ptr<Component>& child) {
    children.push_back(child);
  }
  void add(shared_ptr<Component>&& child) {
    children.push_back(child);
  }
  void print() override {
    for (auto& child : children) {
      child->print();
    }
  }
};
2.2.3.1 窗口
class WinForm : public Container {
protected:
  string title;
public:
  WinForm(const string& title)
  	: title(title)
  { }
  void print() override {
    cout << "print WinForm(" << title << ")" << endl;
    Container::print();
  }
};
2.2.3.2 Frame控件
class Frame : public WinForm {
public:
  Frame(const string& title)
    : WinForm(title)
  { }
  void print() override {
    cout << "print Frame(" << title << ")" << endl;
    Container::print();
  }
};
2.2.4 客户端
int main(int argc, char** argv) {
  shared_ptr<WinForm> client = make_shared<WinForm>("WINDOW窗口");
  
  client->add(make_shared<Picture>("./logo.jpg", "LOGO图片"));
  client->add(make_shared<Button>("登录"));
  client->add(make_shared<Button>("注册"));
  
  shared_ptr<Frame> frame = make_shared<Frame>("FRAME1");
  frame->add(make_shared<Label>("用户名"));
  frame->add(make_shared<TextBox>("文本框"));
  frame->add(make_shared<Label>("密码"));
  frame->add(make_shared<PasswordBox>("密码框"));
  frame->add(make_shared<CheckBox>("复选框"));
  frame->add(make_shared<TextBox>("记住用户名"));
  frame->add(make_shared<LinkLabel>("忘记密码", "http://www.xxx.com"));
  
  client->add(frame);
  
  client->print();
  
  return 0;
}
2.3 运行效果
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