85 lines
2.8 KiB
JavaScript
85 lines
2.8 KiB
JavaScript
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dojo.declare(
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"dijit.tree.model",
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null,
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{
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// summary
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// Contract for any data provider object for the tree. Tree
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// passes in values to the constructor to specify the callbacks.
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// "item" is typically a dojo.data.Item but it's just a black box so
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// it could be anything.
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//
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// This (like dojo.data.api.Read) is just documentation, and not meant to be used.
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destroy: function(){
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// summary: destroys this object, releasing connections to the store
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},
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// =======================================================================
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// Methods for traversing hierarchy
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getRoot: function(onItem){
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// summary:
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// Calls onItem with the root item for the tree, possibly a fabricated item.
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// Throws exception on error.
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},
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mayHaveChildren: function(/*dojo.data.Item*/ item){
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// summary
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// Tells if an item has or may have children. Implementing logic here
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// avoids showing +/- expando icon for nodes that we know don't have children.
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// (For efficiency reasons we may not want to check if an element actually
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// has children until user clicks the expando node)
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},
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getChildren: function(/*dojo.data.Item*/ parentItem, /*function(items)*/ onComplete){
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// summary
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// Calls onComplete() with array of child items of given parent item, all loaded.
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// Throws exception on error.
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},
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// =======================================================================
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// Inspecting items
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getIdentity: function(/* item */ item){
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// summary: returns identity for an item
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},
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getLabel: function(/*dojo.data.Item*/ item){
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// summary: get the label for an item
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},
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// =======================================================================
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// Write interface
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newItem: function(/* Object? */ args, /*Item?*/ parent){
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// summary
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// Creates a new item. See dojo.data.api.Write for details on args.
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},
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pasteItem: function(/*Item*/ childItem, /*Item*/ oldParentItem, /*Item*/ newParentItem, /*Boolean*/ bCopy){
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// summary
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// Move or copy an item from one parent item to another.
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// Used in drag & drop.
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// If oldParentItem is specified and bCopy is false, childItem is removed from oldParentItem.
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// If newParentItem is specified, childItem is attached to newParentItem.
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},
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// =======================================================================
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// Callbacks
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onChange: function(/*dojo.data.Item*/ item){
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// summary
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// Callback whenever an item has changed, so that Tree
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// can update the label, icon, etc. Note that changes
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// to an item's children or parent(s) will trigger an
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// onChildrenChange() so you can ignore those changes here.
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},
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onChildrenChange: function(/*dojo.data.Item*/ parent, /*dojo.data.Item[]*/ newChildrenList){
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// summary
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// Callback to do notifications about new, updated, or deleted items.
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}
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});
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