decorator pattern

DesignPattern/Decorator/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.8" />
+    </startup>
+</configuration>

DesignPattern/Decorator/Circle.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Decorator
+{
+	class Circle : Shape
+	{
+		public Circle(Point origin, int radius)
+		{
+			X = origin.X;
+			Y = origin.Y;
+			Width = radius * 2;
+			Height = radius * 2;
+		}
+
+		public override void Draw(Graphics g)
+		{
+			g.DrawEllipse(Pens.Black, X, Y, Width, Height);
+		}
+	}
+}

DesignPattern/Decorator/Client.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows.Forms;
+
+namespace Decorator
+{
+	class Client
+	{
+		public static void HowToTest()
+		{
+			Form form = new Form();
+			form.Show();
+
+			Graphics gr = form.CreateGraphics();
+
+			Shape shape = new Circle(new Point(100, 100), 50);
+			FillShapeDecorator deco = new FillShapeDecorator(shape);
+			deco.Draw(gr);
+		}
+	}
+}

DesignPattern/Decorator/Decorator.csproj

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{4BDF9142-7984-485F-AA62-77B7B7359966}</ProjectGuid>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Decorator</RootNamespace>
+    <AssemblyName>Decorator</AssemblyName>
+    <TargetFrameworkVersion>v4.8</TargetFrameworkVersion>
+    <FileAlignment>512</FileAlignment>
+    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
+    <Deterministic>true</Deterministic>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug\</OutputPath>
+    <DefineConstants>DEBUG;TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <PlatformTarget>AnyCPU</PlatformTarget>
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release\</OutputPath>
+    <DefineConstants>TRACE</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="System.Drawing" />
+    <Reference Include="System.Windows.Forms" />
+    <Reference Include="System.Xml.Linq" />
+    <Reference Include="System.Data.DataSetExtensions" />
+    <Reference Include="Microsoft.CSharp" />
+    <Reference Include="System.Data" />
+    <Reference Include="System.Net.Http" />
+    <Reference Include="System.Xml" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Circle.cs" />
+    <Compile Include="Client.cs" />
+    <Compile Include="FillShapeDecorator.cs" />
+    <Compile Include="Program.cs" />
+    <Compile Include="Properties\AssemblyInfo.cs" />
+    <Compile Include="Shape.cs" />
+    <Compile Include="ShapeDecorator.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="App.config" />
+  </ItemGroup>
+  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
+</Project>

DesignPattern/Decorator/FillShapeDecorator.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Decorator
+{
+	class FillShapeDecorator : ShapeDecorator
+	{
+		public FillShapeDecorator(Shape shape) : base(shape)
+		{
+
+		}
+
+		public override void Draw(Graphics g)
+		{
+			component.Draw(g);
+
+			g.FillEllipse(Brushes.Green, component.X, component.Y, component.Width, component.Height);
+		}
+	}
+}

DesignPattern/Decorator/Program.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Decorator
+{
+	/*
+	 * 카테고리: 구조 패턴
+	 * 개요: 기존 객체의 구조를 그대로 둔 채, 부가적인 기능을 동적으로 추가함
+	 * 일반적으로 상속등으로 서브클래스를 만들어 사용하는 것의 대안적인 방법으로,
+	 * 너무 많은 서브클래스들이 만들어지는 경우 유용하게 사용될 수 있음
+	 * 서브클래스는 컴파일 타임에 결정되지만, 데코레이터는 런타임에서 동적으로 추가확장 됨
+	 */
+	class Program
+	{
+		static void Main(string[] args)
+		{
+			Client.HowToTest();
+
+			Console.ReadKey();
+		}
+	}
+}

DesignPattern/Decorator/Properties/AssemblyInfo.cs

@@ -0,0 +1,36 @@
+using System.Reflection;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+// 어셈블리에 대한 일반 정보는 다음 특성 집합을 통해 
+// 제어됩니다. 어셈블리와 관련된 정보를 수정하려면
+// 이러한 특성 값을 변경하세요.
+[assembly: AssemblyTitle("Decorator")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("Decorator")]
+[assembly: AssemblyCopyright("Copyright ©  2022")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// ComVisible을 false로 설정하면 이 어셈블리의 형식이 COM 구성 요소에 
+// 표시되지 않습니다. COM에서 이 어셈블리의 형식에 액세스하려면
+// 해당 형식에 대해 ComVisible 특성을 true로 설정하세요.
+[assembly: ComVisible(false)]
+
+// 이 프로젝트가 COM에 노출되는 경우 다음 GUID는 typelib의 ID를 나타냅니다.
+[assembly: Guid("4bdf9142-7984-485f-aa62-77b7b7359966")]
+
+// 어셈블리의 버전 정보는 다음 네 가지 값으로 구성됩니다.
+//
+//      주 버전
+//      부 버전 
+//      빌드 번호
+//      수정 버전
+//
+// 모든 값을 지정하거나 아래와 같이 '*'를 사용하여 빌드 번호 및 수정 번호를
+// 기본값으로 할 수 있습니다.
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

DesignPattern/Decorator/Shape.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Decorator
+{
+	public abstract class Shape
+	{
+		public abstract void Draw(Graphics g);
+
+		public int X { get; set; }
+		public int Y { get; set; }
+		public int Width { get; set; }
+		public int Height { get; set; }
+	}
+}

DesignPattern/Decorator/ShapeDecorator.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Decorator
+{
+	public abstract class ShapeDecorator : Shape 
+	{
+		protected Shape component;
+
+		public ShapeDecorator(Shape shape)
+		{
+			component = shape;
+		}
+	}
+}

DesignPattern/DesignPattern.sln

@@ -19,6 +19,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Bridge", "Bridge\Bridge.csp
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Composite", "Composite\Composite.csproj", "{52E6E6B5-8A12-4A92-8A38-8697247F4CA2}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Decorator", "Decorator\Decorator.csproj", "{4BDF9142-7984-485F-AA62-77B7B7359966}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -57,6 +59,10 @@ Global
 		{52E6E6B5-8A12-4A92-8A38-8697247F4CA2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{52E6E6B5-8A12-4A92-8A38-8697247F4CA2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{52E6E6B5-8A12-4A92-8A38-8697247F4CA2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{4BDF9142-7984-485F-AA62-77B7B7359966}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4BDF9142-7984-485F-AA62-77B7B7359966}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4BDF9142-7984-485F-AA62-77B7B7359966}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4BDF9142-7984-485F-AA62-77B7B7359966}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE