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

namespace?ClipPloygon
{
????public?partial?class?FrmMain?:?Form
????{
????????public?FrmMain（）
????????{
????????????InitializeComponent（）;
????????????myBitmap?=?new?Bitmap（picShow.Width?picShow.Height）;//創建畫布?
????????}
????????List?mcp?=?new?List（）;?//?多邊形頂點列表
????????List?mwp?=?new?List（）;?//?裁剪窗口頂點列表

????????Bitmap?myBitmap;?//定義畫布

????????Point?P;

????????Point?SP;
????????Point?SPR;
????????Point?EP;
????????Point?EPL;

????????int?Flag;?//選擇繪制圖形類型
????????bool?drag;//標記鼠標是否拖拽

????????Pen?myPen;

????????#region?繪圖類別
????????//繪制多邊形
????????private?void?btnDrawPolygon_Click（object?sender?EventArgs?e）
????????{
????????????picShow.Cursor?=?System.Windows.Forms.Cursors.Cross;
????????????Flag?=?2;
????????????mcp.Clear（）;
????????}
????????private?void?btnRectant_Click（object?sender?EventArgs?e）
????????{
????????????picShow.Cursor?=?System.Windows.Forms.Cursors.Cross;
????????????Flag?=?1;
????????????mwp.Clear（）;
????????}
????????#endregion

????????#region?鼠標事件
????????private?void?picShow_MouseDown（object?sender?MouseEventArgs?e）
????????{
????????????P.X?=?e.X;
????????????P.Y?=?e.Y;
????????????drag?=?true;
????????????picShow.Image?=?myBitmap;
????????????using?（Graphics?g?=?Graphics.FromImage（picShow.Image））
????????????{
????????????????if?（Flag?==?1）
????????????????{
????????????????????SP.X?=?P.X;
????????????????????SP.Y?=?P.Y;
????????????????}
????????????????else
????????????????{???????????????????
????????????????????mcp.Add（P）;
????????????????????if?（mcp.Count?>?1）
????????????????????{
????????????????????????g.DrawLine（Pens.Blue?mcp[mcp.Count?-?2]?mcp[mcp.Count?-?1]）;
????????????????????}
????????????????}????????????
????????????}
????????????
????????}
????????private?void?picShow_MouseMove（object?sender?MouseEventArgs?e）
????????{
????????????if?（drag）
????????????{
????????????????if?（Flag?==?1）
????????????????{
????????????????????picShow.Image?=?（Bitmap）myBitmap.Clone（）;//將Graphics對象復制給Bitmap對象
????????????????????using?（Graphics?g?=?Graphics.FromImage（picShow.Image））
????????????????????{
????????????????????????Rectangle?rect?=?new?Rectangle（SP.X?SP.Y?e.X?-?SP.X?e.Y?-?SP.Y）;
????????????????????????g.DrawRectangle（Pens.Black?rect）;

????????????????????}
????????????????}
????????????}
????????}

????????private?void?picShow_MouseUp（object?sender?MouseEventArgs?e）
????????{
????????????drag?=?false;
????????????picShow.Image?=?myBitmap;
????????????using?（Graphics?g?=?Graphics.FromImage（picShow.Image））
????????????{
????????????????if?（Flag?==?1）
????????????????{
????????????????????EP.X?=?e.X;
????????????????????EP.Y?=?e.Y;
????????????????????Rectangle?rect?=?new?Rectangle（SP.X?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\ClipLine\
?????文件????????3618??2013-11-05?01:31??ClipPolygon\ClipLine\ClipPloygon.csproj
?????文件????????6267??2013-11-05?16:25??ClipPolygon\ClipLine\FrmMain.Designer.cs
?????文件????????9389??2013-11-07?10:08??ClipPolygon\ClipLine\FrmMain.cs
?????文件????????5817??2013-11-05?16:25??ClipPolygon\ClipLine\FrmMain.resx
?????文件?????????494??2013-11-05?01:31??ClipPolygon\ClipLine\Program.cs
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\ClipLine\Properties\
?????文件????????1348??2013-11-01?16:10??ClipPolygon\ClipLine\Properties\AssemblyInfo.cs
?????文件????????2861??2013-11-05?01:31??ClipPolygon\ClipLine\Properties\Resources.Designer.cs
?????文件????????5612??2013-11-01?16:10??ClipPolygon\ClipLine\Properties\Resources.resx
?????文件????????1110??2013-11-05?01:31??ClipPolygon\ClipLine\Properties\Settings.Designer.cs
?????文件?????????249??2013-11-01?16:10??ClipPolygon\ClipLine\Properties\Settings.settings
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\ClipLine\bin\
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\ClipLine\bin\Debug\
?????文件???????13824??2013-11-07?10:08??ClipPolygon\ClipLine\bin\Debug\ClipLine.exe
?????文件???????34304??2013-11-07?10:08??ClipPolygon\ClipLine\bin\Debug\ClipLine.pdb
?????文件???????11608??2013-12-04?22:02??ClipPolygon\ClipLine\bin\Debug\ClipLine.vshost.exe
?????文件?????????490??2010-03-17?22:39??ClipPolygon\ClipLine\bin\Debug\ClipLine.vshost.exe.manifest
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\ClipLine\obj\
?????目錄???????????0??2013-11-05?03:11??ClipPolygon\ClipLine\obj\x86\
?????目錄???????????0??2013-11-05?03:24??ClipPolygon\ClipLine\obj\x86\Debug\
?????文件????????3949??2013-11-05?02:38??ClipPolygon\ClipLine\obj\x86\Debug\ClipLine.csproj.FileListAbsolute.txt
?????文件???????13824??2013-11-07?10:08??ClipPolygon\ClipLine\obj\x86\Debug\ClipLine.exe
?????文件???????34304??2013-11-07?10:08??ClipPolygon\ClipLine\obj\x86\Debug\ClipLine.pdb
?????文件?????????180??2013-11-05?16:25??ClipPolygon\ClipLine\obj\x86\Debug\ClipPloygon.FrmMain.resources
?????文件?????????180??2013-11-05?15:31??ClipPolygon\ClipLine\obj\x86\Debug\ClipPloygon.Properties.Resources.resources
?????文件????????3259??2013-12-04?22:04??ClipPolygon\ClipLine\obj\x86\Debug\ClipPloygon.csproj.FileListAbsolute.txt
?????文件????????6056??2013-11-24?16:29??ClipPolygon\ClipLine\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????文件???????17192??2013-11-05?16:25??ClipPolygon\ClipLine\obj\x86\Debug\GenerateResource-ResGen.read.1.tlog
?????文件????????5230??2013-11-05?16:25??ClipPolygon\ClipLine\obj\x86\Debug\GenerateResource-ResGen.write.1.tlog
............此處省略11個文件信息