TreeCollection overview
A set of API methods and events that allow you to work with data of a component with tree-like structure. Applicable to Menu, Ribbon, Sidebar, Toolbar, Tree, TreeGrid.
Methods
| Name | Description |
|---|---|
| add() | adds an item to a component |
| canCopy() | checks whether it is possible to copy a control into some other control |
| copy() | adds a copy of an item and places it in the specified position |
| eachChild() | iterates through child items of a control |
| eachParent() | iterates through all the parent items (the immediate parent and its parent, etc until the parent is the component itself) |
| exists() | checks whether the specified item exists in the component |
| filter() | filters controls by some criteria |
| forEach() | iterates over all items of a tree collection |
| getId() | gets the ID of an item |
| getIndex() | gets the current position of an item |
| getItem() | gets an item by its ID |
| getItems() | gets the child items of a control |
| getLength() | counts child items of a control |
| getParent() | gets the ID of the parent of the control |
| getRoot() | returns the ID of the master component |
| haveItems() | checks whether an item has children |
| isSaved() | checks whether the changes made in a tree collection are saved |
| load() | loads items from a file |
| loadItems() | loads child items of a control from a file |
| move() | moves items to different positions |
| parse() | loads a collection of items from a local source |
| refreshItems() | refreshes child items of a control |
| remove() | removes an item |
| removeAll() | clears the component of all controls |
| restoreOrder() | restores the component to the state previous to sorting / filtering |
| save() | saves changes made in a tree collection to the server side |
| serialize() | serializes the component data into JSON, XML or CSV format |
| sort() | sorts controls according to some criteria |
| update() | changes an item |
Events
| Name | Description |
|---|---|
| afterAdd | fires after adding a new item into a tree collection |
| afterItemLoad | fires after loading an item |
| afterRemove | fires after removing a new item from a tree collection |
| beforeAdd | fires before adding a new item into a tree collection |
| beforeItemLoad | fires before loading an item |
| beforeRemove | fires before removing an item from a tree collection |
| change | fires when a tree collection is modified |
| load | fires when items are loaded in a tree collection |
| loadError | fires when loading of data fails |
| removeAll | fires when all items are removed from a tree collection |
Ways of applying events
To call the event of TreeCollection, you may use either of the two syntaxes:
- common syntax (via the data object of the component)
menu.data.events.on("afterAdd", function(newItem){
console.log("A new item is added");
});
- or short syntax (right through the component)
menu.events.on("afterAdd", function(newItem){
console.log("A new item is added");
});