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Drag and Drop Over different elements

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DragAndDrop
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Simon Allport
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Simon Allport asked on 15 Jul 2010, 11:01 AM
Hi I have a canvas with diffient images in and a list box full of people. When i drag a person from the list over the images, the person is automatically dropped into the first image i come too,even before i release the left mouse button. Is there anyway of getting around this?

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Tina Stancheva
Telerik team
answered on 15 Jul 2010, 11:24 AM
Hi Simon Allport,

Can you please elaborate on the implementation of your scenario a bit more? If you can send us your custom logic for the DradDrop event handlers, we will be able to further investigate the issue. Also, if you can open a support ticket and send us a sample project reproducing the issue, we will take a look at it and help you get around the issue.

Thank you in advance.

Greetings,
Tina Stancheva
the Telerik team
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Simon Allport
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answered on 15 Jul 2010, 11:36 AM
Hi,
Thanks for getting back to me Below is the events for the listbox
private void lbWaitingList_OnDragQuery(object sender, DragDropQueryEventArgs e)
       {
           if (e.Options.Status == DragStatus.DragQuery)
           {
               ListBox list = new ListBox();
               list = (ListBox)e.OriginalSource;
               var waiting = (WaitingList)list.SelectedItem;
               e.QueryResult = true;
               e.Handled = true;
               
               e.Options.DragCue = waiting.Fullname;
               e.Options.ArrowCue = RadDragAndDropManager.GenerateArrowCue();
               e.Options.Payload = waiting.PatientID;
           }
           if (e.Options.Status == DragStatus.DropSourceQuery)
           {
               e.QueryResult = true;
               e.Handled = true;
           }
       }
The Image events
private void bed_OnDropQuery(object sender, DragDropQueryEventArgs e)
      {
          var destination = e.Options.Destination as Image;
            if (e.Options.Status == DragStatus.DropDestinationQuery &&
              destination != null)
          {
                
              e.QueryResult = true;
              e.Handled = true;
          }
      }
private void bed_OnDropInfo(object sender, DragDropEventArgs e)
      {
        
          var destination = e.Options.Destination as Image;
                        txtblkBedSelect.Text = "";
                  int patientid;
                  int apc;
                  int timestamp;
                  string hospital;
                  string listtype;
                  string z = e.Options.Payload.ToString();
                  if (z.Contains("Bed"))
                  {
                      z = z.Replace("Bed", "");
                      z = z.Replace("__", "/");
                      string[] into = z.Split('_');
                     patientid = Convert.ToInt32(into[1]);
                      apc = Convert.ToInt32(into[2]);
                      timestamp = Convert.ToInt32(into[3]);
                      hospital = Convert.ToString(into[4]);
                      listtype = Convert.ToString(into[5]);
                  }
                  else
                  {
                      z = z.Replace("System.Windows.Controls.ListBoxItem:", "");
                      z = z.Replace("__", "/");
                      string[] into = z.Split('#');
                      patientid = Convert.ToInt32(into[0]);
                      apc = Convert.ToInt32(into[1]);
                      timestamp = Convert.ToInt32(into[2]);
                      hospital = Convert.ToString(into[3]);
                      listtype = Convert.ToString(into[4]);
                  }
                  // Gets the bed number that has been selected
                  Image bed = sender as Image;
                  string x = bed.Name.ToString();
                  x = x.Replace("Bed", "");
                  int bednumber = Convert.ToInt32(x.Trim());
                  if (listtype == "T")
                  {
                      var item = (WardList)cbTransferPatientWard.SelectedItem;
                      Transfer transfer = new Transfer();
                      transfer.TransferPatient(patientid, apc, timestamp, _wardcode, Convert.ToString(item.WardCode), hospital, txtblkUsername.Text, txtblkPassword.Text);
                      Wards wards = new Wards();
                      wards.MovePatientFromOtherWard(apc, bednumber, timestamp, _wardcode, txtblkUsername.Text, txtblkPassword.Text);
                      LoadExternalWaitingList();
                  }
                  else
                  {
                      Wards wards = new Wards();
                      wards.AddPatientToBed(bednumber, patientid, apc, timestamp, txtblkUsername.Text, txtblkPassword.Text);
                      LoadExternalWaitingList();
                  }
                  waitinglist("w");
                  DataLoad();
     }
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Simon Allport
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answered on 15 Jul 2010, 01:45 PM
Hi, I solved the problem, i was missing  following statement
if (e.Options.Status == DragStatus.DropComplete && destination != null)
{
  
}
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DragAndDrop
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Simon Allport
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Answers by
Tina Stancheva
Telerik team
Simon Allport
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