(图 ) 处理他们的Click事件 拖拽处理MouseDown MouseUp事件 第二种方法 不添加Label只处理鼠标事件 判断鼠标的位置然后决定执行什么操作 这种方法很耗费资源 每次鼠标点击就要判断 鼠标是否在某个区域然后决定是否要处理 不过这个处理用多态包装了 程序看起来比较整齐 //定义常量 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; //定义MouseDown事件 private void DragMain_MouseDown(object sender System Windows Forms MouseEventArgs e) point X=e X; point Y=e Y; if(e Y 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; //定义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(); //定义基类 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;
//定义接口 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 //其他操作类似。.wInGwIt.cOm 第三种方法：是用责任链这个设计模式来包装鼠标的点击操作，把操作分配到各个责任链的节点上，是程序更加面向对象，有更好的扩展性。 //两个鼠标事件 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); //封装的请求类 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); //其他操作类似 第四种方法：（只是有想法还没有找到成功的实现办法） 在MFC中可以用PostMessage或者SendMessag发消息，当鼠标单击，但不在窗体的CaptionTitle上时，发一个消息告诉系统鼠标在CaptionTitle（每个窗口自己TitleBar）上，这样窗口的拖拽就可以由系统托管了。现在实现了在窗口中任意位置单击鼠标拖拽窗体。但是没有实现上面要求的那些多样化操作。 if(point.y m_Height) //发消息给系统伪装鼠标在Caption Bar 上。 if(point.x m_Drag) PostMessage(WM_NCLBUTTONDOWN, HTCAPTION, MAKELPARAM(point.x,point.y)); return; if(point.x m_Drag+this->m_Min&&point.x>this->m_Drag) PostMessage(WM_NCLBUTTONDOWN, HTMINBUTTON, MAKELPARAM(point.x,point.y)); return; if(point.x m_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.x m_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; cha138/Article/program/net/201311/13231