using?System;
using?System.Collections.Generic;
using?System.Collections;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

namespace?DrawRect
{
????public?enum?DirectionalType
????{
????????UP_LEFT
????????UP
????????UP_RIGHT
????????RIGHT
????????DOWN_RIGHT
????????DOWN
????????DOWN_LEFT
????????LEFT
????????NONE
????}

????public?partial?class?Canvas?:?Panel
????{
????????public?Canvas（）
????????{
????????????InitializeComponent（）;

????????????DoubleBuffered?=?true;

????????????this.Setstyle（Controlstyles.AllPaintingInWmPaint?|?Controlstyles.OptimizedDoubleBuffer?|?Controlstyles.UserPaint?true）;

????????????this.m_Rect?=?new?Rectangle（8?8?this.Width-16?this.Height）;
????????}

????????bool?isMove?=?false;

????????Rectangle?m_Rect?=?Rectangle.Empty;

????????Point?m_LastPoint?=?Point.Empty;

????????DirectionalType?m_StretchingType?=?DirectionalType.NONE;

????????Hashtable?m_MapStretchingTypeRect?=?new?Hashtable（）;

????????void?CreateRects（）
????????{
????????????m_MapStretchingTypeRect.Clear（）;

????????????m_MapStretchingTypeRect[DirectionalType.UP]?=?new?Rectangle（this.m_Rect.Left?+?this.m_Rect.Width?/?2?-?3?this.m_Rect.Top?-?3?6?6）;

????????????m_MapStretchingTypeRect[DirectionalType.RIGHT]?=?new?Rectangle（this.m_Rect.Right?-?3?this.m_Rect.Top?+?this.m_Rect.Height?/?2?-?3?6?6）;

????????????m_MapStretchingTypeRect[DirectionalType.DOWN]?=?new?Rectangle（this.m_Rect.Left?+?this.m_Rect.Width?/?2?-?3?this.m_Rect.Bottom?-?3?6?6）;

????????????m_MapStretchingTypeRect[DirectionalType.LEFT]?=?new?Rectangle（this.m_Rect.Left?-?3?this.m_Rect.Top?+?this.m_Rect.Height?/?2?-?3?6?6）;


????????????m_MapStretchingTypeRect[DirectionalType.UP_LEFT]?=?new?Rectangle（this.m_Rect.Left?-?3?this.m_Rect.Top?-?3?6?6）;

????????????m_MapStretchingTypeRect[DirectionalType.UP_RIGHT]?=?new?Rectangle（this.m_Rect.Right?-?3?this.m_Rect.Top?-?3?6?6）;

????????????m_MapStretchingTypeRect[DirectionalType.DOWN_RIGHT]?=?new?Rectangle（this.m_Rect.Right?-?3?this.m_Rect.Bottom?-?3?6?6）;

????????????m_MapStretchingTypeRect[DirectionalType.DOWN_LEFT]?=?new?Rectangle（this.m_Rect.Left?-?3?this.m_Rect.Bottom?-?3?6?6）;

????????}

????????void?DrawRects（Graphics?g）
????????{
????????????foreach?（DictionaryEntry?item?in?m_MapStretchingTypeRect）
????????????{
????????????????DirectionalType?type?=?（DirectionalType）item.Key;

????????????????Rectangle?rect?=?（Rectangle）item.Value;

????????????????if?（m_StretchingType?==?type）
????????????????{
????????????????????g.FillRectangle（new?SolidBrush（Color.FromArgb（255?Color.Green））?rect）;

????????????????????g.DrawRectangle（new?Pen（Color.Green）?rect）;
????????????????}
????????????????else
????????????????{?
????????????????????g.DrawRectangle（new?Pen（Color.Green）?rect）;
????????????????}

???

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-09-29?16:55??DrawRect\
?????文件?????????187??2018-09-29?10:24??DrawRect\App.config
?????目錄???????????0??2018-09-29?16:54??DrawRect\bin\
?????目錄???????????0??2018-09-29?16:54??DrawRect\bin\Debug\
?????文件???????12800??2018-09-29?16:54??DrawRect\bin\Debug\DrawRect.exe
?????文件?????????187??2018-09-29?10:24??DrawRect\bin\Debug\DrawRect.exe.config
?????文件???????28160??2018-09-29?16:54??DrawRect\bin\Debug\DrawRect.pdb
?????文件???????24224??2018-09-29?16:53??DrawRect\bin\Debug\DrawRect.vshost.exe
?????文件????????8885??2018-09-29?16:31??DrawRect\canvas.cs
?????文件????????1142??2018-09-29?16:19??DrawRect\Canvas.Designer.cs
?????文件????????5990??2018-09-29?16:17??DrawRect\Canvas.resx
?????文件????????4162??2018-09-29?16:19??DrawRect\DrawRect.csproj
?????文件?????????984??2018-09-29?16:55??DrawRect\DrawRect.sln
?????文件???????14848??2018-09-29?13:28??DrawRect\DrawRect.suo
?????文件???????43520??2018-09-29?16:55??DrawRect\DrawRect.v12.suo
?????文件?????????442??2018-09-29?16:21??DrawRect\FormMain.cs
?????文件????????2432??2018-09-29?16:21??DrawRect\FormMain.Designer.cs
?????文件????????5817??2018-09-29?16:21??DrawRect\FormMain.resx
?????目錄???????????0??2018-09-29?16:53??DrawRect\obj\
?????目錄???????????0??2018-09-29?16:54??DrawRect\obj\Debug\
?????文件????????6798??2018-09-29?16:31??DrawRect\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????7132??2018-09-29?16:53??DrawRect\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????文件?????????180??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.Canvas.resources
?????文件????????2309??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.csproj.FileListAbsolute.txt
?????文件????????1039??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.csproj.GenerateResource.Cache
?????文件???????12800??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.exe
?????文件?????????180??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.FormMain.resources
?????文件???????28160??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.pdb
?????文件?????????180??2018-09-29?16:54??DrawRect\obj\Debug\DrawRect.Properties.Resources.resources
?????文件???????????0??2018-09-29?10:24??DrawRect\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs
?????文件???????????0??2018-09-29?10:24??DrawRect\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs
............此處省略17個文件信息