MouseMove捕捉

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原创最新推荐文章于 2025-03-23 16:48:40 发布 1k 阅读 AI 写同款· GEO 优化 ›

用WM_MOUSEMOVE消息画轨迹点时，发现鼠标移动很快的时候只能画出少数几个点。用WM_MOUSEMOVE消息画轨迹点时，发现鼠标移动很快的时候只能画出少数几个点。然后找到这样一段话，但还是不怎么能了解什么意思。 WM_MOUSEMOVE 消息报告光标在窗口客户区的移动。当鼠标移动时，在光标下面的窗口会接收到快速报告光标最近位置的WM_MOUSEMOVE 消息。Windows用一种有趣的方法来投递WM_MOUSEMOVE 消息，以防止运行缓慢的应用程序被阅读详情

  private void Grid_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e)
  {
  ShowHitInfo(this.gridView1.CalcHitInfo(new Point(e.X, e.Y)));
  }

  private void ShowHitInfo(DevExpress.XtraGrid.Views.Grid.ViewInfo.GridHitInfo hi)
  {
   DevExpress.XtraGrid.Views.Base.ColumnView cgv =
    (DevExpress.XtraGrid.Views.Base.ColumnView)Grid.MainView;

   string columnName = hi.Column == null ? "No column" : hi.Column.Caption;
   switch(columnName)
   {
       case "账号":
     txtUserName.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
     break;
    case "密码":
     txtPassword.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
     break;
    case "真实姓名":
     txtRealName.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
     break;
    case "电子邮件":
     txtEmail.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
     break;
    case "角色":
     cbRole.Text = cgv.GetRowCellDisplayText(hi.RowHandle,hi.Column);
     break;
    default:
     txtUserName.Text = "Null";
     txtPassword.Text = "Null";
     txtRealName.Text = "Null";
     txtEmail.Text = "Null";
     cbRole.Text = "Null";
     break;
   }