C#中勢將窗體拖拽進行到底

　　問題描述 

　　想在Net下實現對一些非規則窗體沒有CaptionFormBorderStyle = SystemWindowsFormsFormBorderStyleNone;窗體的拖拽最小化最大化特殊操作的實現(如圖所示)在黃色的區域即區域裡實現對窗體的拖拽操作在橙色區域即區域裡實現對窗體的最小化操作在藍色區域即區域裡實現對窗體的關閉操作在綠色區域即區域裡實現對窗體的特殊操作(如雙倍窗體)
  

　　

　　(圖) 

　　問題實現

　　第一種方法添加Label為Label添加Click事件(如圖所示) 如果要用這種方法實現就要為每一個顏色區域進行切圖並要保證有正確的切圖長和寬然後設置Label的背景為這個圖片

　　

　　(圖) 

　　 處理他們的Click事件拖拽處理MouseDown MouseUp事件 

第二種方法不添加Label只處理鼠標事件判斷鼠標的位置然後決定執行什麼操作這種方法很耗費資源每次鼠標點擊就要判斷鼠標是否在某個區域然後決定是否要處理不過這個處理用多態包裝了程序看起來比較整齊
 
 //定義常量
   private Point point;
   private const int dragMove=;
   private const int dragMin=;
   private const int dragClose=;
   private const int dragDouble=;
   private const int dragHeight=;
   private MouseHandleEnum dragEnum;
  
  //定義MouseDown事件
  private void DragMain_MouseDown(object sender SystemWindowsFormsMouseEventArgs e)
   {
   pointX=eX;
   pointY=eY;
   if(eY   {
   if(e.X   {
   dragEnum = MouseHandleEnum.Move;
   return;
   }
   if(e.X   {
   dragEnum = MouseHandleEnum.Min;
   return;
   }
   if(e.X   {
   dragEnum = MouseHandleEnum.Close;
   return;
   }
   if(e.X   {
   dragEnum = MouseHandleEnum.Double;
   return;
   }
   }
  
   }
  
  
  //定義MouseUp事件
  private void DragMain_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
   {
   point.X=e.X-point.X;
   point.Y=e.Y-point.Y;
   IDragMouse idragMouse;
   switch(dragEnum)
   {
   case MouseHandleEnum.Move :
   idragMouse = new MouseMove(point,this);
   break;
   case MouseHandleEnum.Min :
   idragMouse = new MouseMin(point,this);
   break;
   case MouseHandleEnum.Close :
   idragMouse = new MouseClose(point,this);
   break;
   case MouseHandleEnum.Double :
   idragMouse = new MouseDouble(point,this);
   break;
   default:
   idragMouse = null;
   break;
   }
   if(idragMouse!=null)
   idragMouse.MouseDo();
   }
   }
 
 //定義基類
  namespace DragMouse
  {
  public enum MouseHandleEnum
  {
   None=0,
   Move=1,
   Min=2,
   Close=3,
   Double=4,
  }
  public class DragMouseBase
   {
   protected Point point;
   public Form form;
   public DragMouseBase(Point point, Form form)
   {
   this.point = point;
   this.form = form;
   }
   }
  }
 

　　//定義接口
  namespace DragMouse
  {
   ///

   ///
   ///

   public interface IDragMouse
   {
   void MouseDo();
   }
  }
 
 //拖拽操作
  namespace DragMouse
  {
   ///

   ///
   ///

   public class MouseClose : DragMouseBase,IDragMouse
   {
   public MouseClose(Point point,Form form):base(point,form)
   {
   //
   // TODO: Add constructor logic here
   //
   }
   #region IDragMouse Members
  
   public void MouseDo()
   {
   Application.Exit();
   // TODO: Add MouseClose.MouseDo implementation
   }
  
   #endregion
   }
  }
 
 //其他操作類似。TW.WingwIt.cOm 

　第三種方法：是用責任鏈這個設計模式來包裝鼠標的點擊操作，把操作分配到各個責任鏈的節點上，是程序更加面向對象，有更好的擴展性。
  
  
  //兩個鼠標事件
  private void DragMain_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
   {
   request.GetInformation(e.X,e.Y);
  
   }
  
  
  private void DragMain_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e)
   {
   request.SetScreenPoint(e.X,e.Y);
  
   }
  
  //封裝的請求類
   public class Request
   {
   public int iScreenX;
   public int iScreenY;
  
   public int eX;
   public int eY;
  
   public readonly int yHigh;
   public readonly int dragLength;
   public readonly int minLength;
   public readonly int closeLength;
   public readonly int doubleLength;
  
   private DragHandler dragHandler;
   private MinHandler minHandler;
   private CloseHandler closeHandler;
   private DoubleHandler doubleHandler;
  
   public Form parentForm;
  
   public void SetScreenPoint(int iX,int iY)
   {
   iScreenX = iX;
   iScreenY = iY;
   dragHandler.HandleRequest(this);
   }
  
   public void GetInformation(int ex,int ey)
   {
   eX=ex;
   eY=ey;
   }
  
   public Request(int yhigh,int draglength,Form form)
   {
   yHigh = yhigh;
   dragLength = draglength;
   parentForm = form;
   dragHandler = new DragHandler();
   minHandler =new MinHandler();
   closeHandler = new CloseHandler();
   doubleHandler = new DoubleHandler();
  
   dragHandler.SetSuccessor(minHandler);
   minHandler.SetSuccessor(closeHandler);
   closeHandler.SetSuccessor(doubleHandler);
   }
  
  
  public Request(int yhigh,int draglength,int minlength,Form form):this(yhigh,draglength,form)
   {
   minLength = minlength;
   }
  
  
  public Request(int yhigh,int draglength,int minlength,int closelength,Form form):this(yhigh,draglength,minlength,form)
   {
   closeLength = closelength;
   }
  
  
  public Request(int yhigh,int draglength,int minlength,int closelength, int doublelength , Form form):this(yhigh,draglength,minlength,closelength,form)
   {
   doubleLength = doublelength;
   }
  
   }
 
 //拖拽操作
   public class DragHandler : Handler
   {
   override public void HandleRequest(Request request)
   {
   // determine if we can handle the request
   if ((request.eY   {
   request.parentForm.Left += request.iScreenX-request.eX;
   request.parentForm.Top += request.iScreenY-request.eY;
  
   // request handling code goes here
   }
   else
   {
   // not handled here - pass on to next in the chain
   if (successorHandler != null)
   successorHandler.HandleRequest(request);
   }
   }
   } 
 
 //其他操作類似 
   
第四種方法：（只是有想法還沒有找到成功的實現辦法） 

　　在MFC中可以用PostMessage或者SendMessag發消息，當鼠標單擊，但不在窗體的CaptionTitle上時，發一個消息告訴系統鼠標在CaptionTitle（每個窗口自己TitleBar）上，這樣窗口的拖拽就可以由系統托管了。現在實現了在窗口中任意位置單擊鼠標拖拽窗體。但是沒有實現上面要求的那些多樣化操作。
  
   if(point.ym_Height)
   {
  //發消息給系統偽裝鼠標在Caption Bar 上。
   if(point.xm_Drag)
   {
   PostMessage(WM_NCLBUTTONDOWN,
   HTCAPTION,
   MAKELPARAM(point.x,point.y));
   return;
   }
   if(point.xm_Drag+this->m_Min&&point.x>this->m_Drag)
   {
   PostMessage(WM_NCLBUTTONDOWN,
   HTMINBUTTON,
   MAKELPARAM(point.x,point.y));
   return;
   }
   if(point.xm_Drag+this->m_Min+this->m_Close&&point.x>this->m_Drag+this->m_Min)
   {
   PostMessage(WM_NCLBUTTONDOWN,
   HTCLOSE,
   MAKELPARAM(point.x,point.y));
   return;
   }
   if(point.xm_Drag+this->m_Min+this->m_Close+this->m_Double&&point.x>this->m_Drag+this->m_Min+this->m_Close)
   {
   CRgn *rgn = new CRgn();
   CRect *rect =new CRect();
   this->GetWindowRect(*rect);
   this->SetWindowRgn(*rgn,true);
   return;
   }
  
   }

From:http://tw.wingwit.com/Article/program/net/201311/13231.html