外觀模式.cpp

#include <iostream>
#include <memory>
using namespace std;// 中間層角色，隔離接口，兩部分模塊通過中間層打交道
// 提供簡單接口，不與底層直接打交道
// 提供統一接口，訪問子系統中的一群接口
// 定義高層接口，讓子系統更容易使用// 迪米特法則
// 一個對象對其他對象的了解應盡可能少，降低對象間耦合，提高系統的可維護性namespace ns1
{class graphic // 圖形相關類{graphic(){};graphic(const graphic &tmpobj);graphic &operator=(const graphic &tmpobj);~graphic(){};public:static graphic &getInstance(){static graphic instance;return instance;}public:void display(bool enable) // 是否全屏顯示(true：是){cout << "full screen->" << enable << endl;}void effect(bool enable) // 是否開啟特效(true：是){cout << "special effects->" << enable << endl;}void resolution(int index) // 設置窗口分辨率{cout << "resolution ratio->" << index << endl;}void antialiasing(bool enable) // 是否開啟抗鋸齒(true：是){cout << "anti-aliasing->" << enable << endl;}};class sound // 聲音相關類{sound(){};sound(const sound &tmpobj);sound &operator=(const sound &tmpobj);~sound(){};public:static sound &getInstance(){static sound instance;return instance;}public:void bgsound(bool enable) // 是否開啟背景聲音(true：是){cout << "background sound->" << enable << endl;}void envirsound(bool enable) // 是否開啟環境音效(true：是){cout << "environmental sound effect->" << enable << endl;}void expsound(bool enable) // 是否開啟表情聲音(true：是){cout << "expressional voice->" << enable << endl;}void setvolume(int level) // 音量大小設置(0-100){cout << "volume->" << level << endl;}};class chatvoice // 語音聊天相關類{chatvoice(){};chatvoice(const chatvoice &tmpobj);chatvoice &operator=(const chatvoice &tmpobj);~chatvoice(){};public:static chatvoice &getInstance(){static chatvoice instance;return instance;}public:void micvolume(int level) // 麥克風音量大小設置(0-100){cout << "microphone volume->" << level << endl;}void micsens(int level) // 麥克靈敏度設置(0-100){cout << "microphone sensitivity->" << level << endl;}void chatvolume(int level) // 聊天音量設置(0-100){cout << "chat volume->" << level << endl;}};class conffacade // 扮演外觀模式角色的類{conffacade(){};conffacade(const conffacade &tmpobj);conffacade &operator=(const conffacade &tmpobj);~conffacade(){};public:static conffacade &getInstance(){static conffacade instance;return instance;}public:void LowConfComputer() // 對于低配置電腦，只開啟一些低配置選項{graphic &g_gp = graphic::getInstance();g_gp.display(true); // 全屏耗費資源更低g_gp.effect(false);g_gp.resolution(2);g_gp.antialiasing(false);sound &g_snd = sound::getInstance();g_snd.bgsound(false);g_snd.envirsound(false);g_snd.expsound(false);g_snd.setvolume(15);chatvoice &g_cv = chatvoice::getInstance();g_cv.micvolume(20);g_cv.micsens(50);g_cv.chatvolume(60);}void HighConfComputer() // 對于高配置電腦，能達到最好效果的項全部開啟{graphic &g_gp = graphic::getInstance();g_gp.display(false);g_gp.effect(true);g_gp.resolution(0);g_gp.antialiasing(true);sound &g_snd = sound::getInstance();g_snd.bgsound(true);g_snd.envirsound(true);g_snd.expsound(true);g_snd.setvolume(50);chatvoice &g_cv = chatvoice::getInstance();g_cv.micvolume(100);g_cv.micsens(100);g_cv.chatvolume(100);}};
}namespace ns2
{class Screen // 屏幕{public:void On() { cout << "screen on!" << endl; }void Off() { cout << "screen off!" << endl; }};class Light // 燈光{public:void On() { cout << "light open!" << endl; }void Off() { cout << "light close!" << endl; }};class Speaker // 音箱{public:void On() { cout << "speaker on!" << endl; }void Off() { cout << "speaker off!" << endl; }};class DvdPlayer // DVD播放器{public:void On() { cout << "dvd open!" << endl; }void Off() { cout << "dvd close!" << endl; }};class PlayerStation // 游戲機{public:void On() { cout << "playerstation on!" << endl; }void Off() { cout << "playerstation off!" << endl; }};class HomeTheaterFacade // 家庭影院外觀模式類{Screen scnobj;Light lgobj;Speaker spkobj;DvdPlayer dpobj;PlayerStation psobj;public:void WatchMovie() // 看電影{// 屏幕打開，燈光熄滅，音箱打開，DVD播放器打開，游戲機關閉。scnobj.On();lgobj.Off();spkobj.On();dpobj.On();psobj.Off();}void PlayGame() // 玩游戲{// 屏幕打開，燈光打開，音箱打開，DVD播放器關閉，游戲機打開。scnobj.On();lgobj.On();spkobj.On();dpobj.Off();psobj.On();}};
}namespace ns3
{class Shape{public:virtual ~Shape() = default;virtual void draw() const = 0;};class Rectangle : public Shape{public:void draw() const override { cout << "Rectangle::draw()" << endl; }};class Square : public Shape{public:void draw() const override { cout << "Square::draw()" << endl; }};class Circle : public Shape{public:void draw() const override { cout << "Circle::draw()" << endl; }};class ShapeMaker{shared_ptr<Shape> circle;shared_ptr<Shape> rectangle;shared_ptr<Shape> square;public:ShapeMaker(){circle = make_shared<Circle>();rectangle = make_shared<Rectangle>();square = make_shared<Square>();}void drawCircle() const { circle->draw(); }void drawRectangle() const { rectangle->draw(); }void drawSquare() const { square->draw(); }};
}int main()
{
#if 0using namespace ns1;graphic &g_gp = graphic::getInstance();g_gp.display(false);g_gp.effect(true);g_gp.resolution(2);g_gp.antialiasing(false);cout << "---------------" << endl;sound &g_snd = sound::getInstance();g_snd.setvolume(80);g_snd.envirsound(true);g_snd.bgsound(false);cout << "---------------" << endl;chatvoice &g_cv = chatvoice::getInstance();g_cv.chatvolume(70);g_cv.micsens(65);
#endif#if 0using namespace ns1;conffacade &g_cffde = conffacade::getInstance();cout << "Low-configuration computer" << endl;g_cffde.LowConfComputer();cout << "------------------" << endl;cout << "high-configuration computer" << endl;g_cffde.HighConfComputer();
#endif#if 0ns2::HomeTheaterFacade htfacobj;cout << "movie---------------" << endl;htfacobj.WatchMovie();cout << "game---------------" << endl;htfacobj.PlayGame();
#endif#if 1using namespace ns3;shared_ptr<ShapeMaker> shapeMaker(new ShapeMaker());shapeMaker->drawCircle();shapeMaker->drawRectangle();shapeMaker->drawSquare();
#endifcout << "Over!\n";return 0;
}