【设计模式】中介者模式

概念

行为模式

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类图

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代码

#include <iostream>using namespace std;class Component;
class Mediator {
public:virtual void Notify(Component* sender, const string& event) = 0;
};class Component {
public:explicit Component(Mediator* mediator) {dialog = mediator;}void Click() {dialog->Notify(this, "click");}void KeyPress() {dialog->Notify(this, "keypress");}protected:Mediator* dialog;
};class Button : public Component {};class Textbox : public Component {};class Checkbox : public Component {
public:explicit Checkbox(Mediator* mediator) : Component(mediator) {};void Check() {dialog->Notify(this, "check");}
};class AuthenticationDialog : public Mediator {
public:explicit AuthenticationDialog(const string& dialog) {title = dialog;}void Notify(Component* sender, const string& event) override {cout << "Auth " << event << endl;}private:string title;// Checkbox* loginOrRegisterCheckbox;// Textbox* loginUserName, loginPassword;// Textbox* registrationUsername, registrationPassword, registrationEmail;// Button* okButton, cancelButton;
};int main(int argc, char *argv[]) {auto auth = new AuthenticationDialog("OnBoarding");auto checkbox = new Checkbox(auth);auth->Notify(checkbox, "notify");checkbox->Check();delete checkbox;delete auth;return 0;
}