Can't resize GridView and DataGrid columns #62

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1. meroving commented on May 17, 2013

   

   meroving

   on May 17, 2013

   Author

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   Resolves with

   || HitTest4Type<GridViewColumnHeader>(sender, e)

   check at PreviewMouseDown

   DataGridColumnHeader can be tested only for .NET4 version
2. osicka commented on Jul 10, 2013

   

   osicka

   on Jul 10, 2013

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   This does not work in a GridView when you drag the column header to reorder its position in the grid. It still drags the first data row.

   The GridViewColumnHeader changes Visibility and the test in HitTest4Type fails.

   I have worked around this by changing HitTest4Type to include a testVisibility parameter.

       private static bool HitTest4Type<T>(object sender, MouseButtonEventArgs e, bool testVisibility = true) where T : UIElement
       {
           var hit = VisualTreeHelper.HitTest((Visual)sender, e.GetPosition((IInputElement)sender));
           if (hit == null)
           {
               return false;
           }
           else
           {
               var element = hit.VisualHit.GetVisualAncestor<T>();
               return element != null && (testVisibility == false || element.Visibility == Visibility.Visible);
           }
       }
   
3. osicka commented on Jul 10, 2013

   

   osicka

   on Jul 10, 2013

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   The following also fixes the above issue I spoke about, though it does put a specific test into a generic function.

   return element != null && ((element is GridViewColumnHeader && (element as GridViewColumnHeader).Role == GridViewColumnHeaderRole.Floating) || element.Visibility == Visibility.Visible);
4. ghost assigned

   punker76

   on Aug 6, 2013
5. punker76

   added a commit that references this issue on Aug 6, 2013

   fix Issue #62 and working with net35

   ae15827
6. punker76 commented on Aug 6, 2013

   

   punker76

   on Aug 6, 2013

   Owner

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   will be fixed with 0.1.3.9
7. punker76

   closed this as completedon Aug 6, 2013
8. timeichfeld-msa commented on Mar 30, 2021

   

   timeichfeld-msa

   on Mar 30, 2021

   More actions

   Hello,
   This still does not seem to work, I cannot resize headers in a GridControl.
   If I set dd:DragDrop.IsDragSource="False" in the Grid, I get resize of columns back, but can't drag/drop.
   Is there a solution, or a flag I need to set or a special way to define the DD on the grid?

   Please advise.

   Thanks much! :)