HasChildren

List List Item - HasChildren Property

Controls the appearance of the expand and collapse image for the item

Member of List List Item (PRIM_LIST.ListItem)

Data Type - Enumeration

Details

The HasChildren property is used to control the appearance of the expand/collapse image for an item.
 
By default the control will show the correct icon for an item. If there are no child items, no expand image will be shown.
 
When building trees on demand it is necessary to show the expand item even though there are no child items yet. This means that the item can expand, and the HasChildren can be tested to see whether there is a need to load the branch.

Allowed Values

Enum Value	Description
No	Hide the expand/collapse image. The item cannot be expanded.
Unknown	Show the expand/collapse image. The item can be expanded.
Yes	Show the expand/collapse image. The item can be expanded.

Example

In this example of how you might handle dynamically loading a tree, if there are already child items for an expanding item, they are delete and the branch reloaded.

Evtroutine Handling(#List.ItemExpanding)
 
   Case (#List.CurrentItem.HasChildren)
 
   When (= Unknown)
 
      #Com_owner.LoadBranch
 
   When (= Yes)
 
      #List.CurrentItem.DeleteAll
      #Com_owner.LoadBranch
 
   Endcase
 
Endroutine

Details

Allowed Values

Example

See also