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150 lines
4.4 KiB
JavaScript
150 lines
4.4 KiB
JavaScript
define("dijit/tree/model", ["dojo/_base/declare"], function(declare){
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return 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.
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// description:
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// Tree 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:
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// Destroys this object, releasing connections to the store
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// tags:
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// extension
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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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// tags:
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// extension
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},
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mayHaveChildren: function(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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// item: dojo/data/Item
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// tags:
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// extension
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},
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getChildren: function(parentItem, 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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// parentItem: dojo/data/Item
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// onComplete: function(items)
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// tags:
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// extension
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},
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// =======================================================================
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// Inspecting items
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isItem: function(something){
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// summary:
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// Returns true if *something* is an item and came from this model instance.
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// Returns false if *something* is a literal, an item from another model instance,
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// or is any object other than an item.
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// tags:
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// extension
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},
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fetchItemByIdentity: function(keywordArgs){
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// summary:
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// Given the identity of an item, this method returns the item that has
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// that identity through the onItem callback. Conforming implementations
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// should return null if there is no item with the given identity.
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// Implementations of fetchItemByIdentity() may sometimes return an item
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// from a local cache and may sometimes fetch an item from a remote server.
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// tags:
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// extension
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},
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getIdentity: function(item){
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// summary:
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// Returns identity for an item
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// tags:
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// extension
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},
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getLabel: function(item){
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// summary:
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// Get the label for an item
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// tags:
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// extension
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},
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// =======================================================================
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// Write interface
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newItem: function(args, parent, insertIndex, before){
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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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// args: dijit/tree/dndSource.__Item
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// parent: Item
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// insertIndex: int?
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// Allows to insert the new item as the n'th child of `parent`.
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// before: Item?
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// Insert the new item as the previous sibling of this item. `before` must be a child of `parent`.
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// tags:
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// extension
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},
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pasteItem: function(childItem, oldParentItem, newParentItem, bCopy, insertIndex, before){
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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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// childItem: Item
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// oldParentItem: Item
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// newParentItem: Item
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// bCopy: Boolean
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// insertIndex: int?
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// Allows to insert the new item as the n'th child of `parent`.
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// before: Item?
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// Insert the new item as the previous sibling of this item. `before` must be a child of `parent`.
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// tags:
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// extension
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},
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// =======================================================================
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// Callbacks
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onChange: function(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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// item: dojo/data/Item
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// tags:
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// callback
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},
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onChildrenChange: function(parent, newChildrenList){
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// summary:
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// Callback to do notifications about new, updated, or deleted items.
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// parent: dojo/data/Item
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// newChildrenList: dojo/data/Item[]
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// tags:
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// callback
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}
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});
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}); |