class in UnityEngine.UIElements
/
Inherits from:UIElements.CollectionViewController
/
Implemented in:UnityEngine.UIElementsModule
Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.
CloseFor some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.
CloseBase collection tree view controller. View controllers of this type are meant to take care of data virtualized by any BaseTreeView inheritor.
baseTreeView | View for this controller, cast as a BaseTreeView. |
itemsSource | Items for this tree. Contains items that are expanded in the tree. |
CanChangeExpandedState | Determines whether the item with the specified ID can be expanded or collapsed. |
CollapseAll | Collapses all items in the tree and refreshes the view. |
CollapseItem | Collapses the item with the specified ID, hiding its children. Allows to collapse the whole hierarchy under that item. |
CollapseItemByIndex | Collapses the item with the specified index, hiding its children. Allows to collapse the whole hierarchy under that item. |
Exists | Checks if an ID exists within this tree. |
ExpandAll | Expands all items in the tree and refreshes the view. |
ExpandItem | Expands the item with the specified ID, making its children visible. Allows to expand the whole hierarchy under that item. |
ExpandItemByIndex | Expands the item with the specified index, making his children visible. Allows to expand the whole hierarchy under that item. |
GetAllItemIds | Returns all item IDs that can be found in the tree, optionally specifying root IDs from where to start. |
GetChildIndexForId | Gets the child index under the parent of the item with the specified ID. |
GetChildrenIds | Get all children of a specific ID in the tree. |
GetChildrenIdsByIndex | Gets the children IDs of the item with the specified index. |
GetIdForIndex | Returns the ID for a specified index in the visible items source. |
GetIndentationDepth | Returns the depth of the element at that ID. |
GetIndentationDepthByIndex | Return the depth of the element at that index. |
GetIndexForId | Returns the index in the source of the item, by ID. |
GetParentId | Returns the parent ID of an item, by ID. |
GetRootItemIds | Returns the root items of the tree, by IDs. |
GetTreeItemsCount | Get the number of items in the whole tree. |
HasChildren | Return whether the item with the specified ID has one or more child. |
HasChildrenByIndex | Return whether the item with the specified index has one or more child. |
IsExpanded | Return whether the item with the specified ID is expanded in the tree. |
IsExpandedByIndex | Return whether the item with the specified index is expanded in the tree. |
Move | Moves an item by ID, to a new parent and child index. |
TryRemoveItem | Removes an item by id. |
itemsSource | The items source stored in a non-generic list. |
view | The view for this controller. |
Dispose | Called when this controller is not longer needed to provide a way to release resources. |
GetItemForId | Returns the item with the specified ID. |
GetItemForIndex | Returns the item with the specified index. |
GetItemsCount | Returns the expected item count in the source. |
SetView | Sets the view for this controller. |
BindItem | Binds a row to an item index. |
DestroyItem | Destroys a VisualElement when the view is rebuilt or cleared. |
MakeItem | Creates a VisualElement to use in the virtualization of the collection view. |
PrepareView | Initialization step once the view is set. |
RaiseItemIndexChanged | Invokes the itemIndexChanged event. |
RaiseItemsSourceChanged | Invokes the itemsSourceChanged event. |
SetItemsSourceWithoutNotify | Set the itemsSource without raising the itemsSourceChanged event. |
UnbindItem | Unbinds a row to an item index. |
itemIndexChanged | Raised when an item in the source changes index. The first argument is source index, second is destination index. |
itemsSourceChanged | Raised when the itemsSource changes. |
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.