The IMenuDataDescriptor interface defines the interface that a
dataDescriptor for a Menu or MenuBar control must implement.
The interface provides methods for parsing and modifyng a collection
of data that is displayed by a Menu or MenuBar control.
public function addChildAt(parent:Object, newChild:Object, index:int, model:Object = null):Boolean
Add a child node to a node at the specified index.
This implementation does the following:
- If the
parent parameter is null or undefined,
inserts the child parameter at the
specified index in the collection specified by model
parameter.
- If the
parent parameter has a children
field or property, the method adds the child parameter
to it at the index parameter location.
In this case, the model parameter is not required.
- If the
parent parameter does not have a children
field or property, the method adds the children
property to the parent. The method then adds the
child parameter to the parent at the
index parameter location.
In this case, the model parameter is not required.
- If the
index value is greater than the collection
length or number of children in the parent, adds the object as
the last child.
Parameters
| parent:Object — The node object that will parent the child.
|
| |
| newChild:Object — The node object that will be parented by the node.
|
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| index:int — The 0-based index of where to put the child node relative to the parent.
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| model:Object (default = null) |
Returns
| Boolean — true if successful.
|
public function getChildren(node:Object, model:Object = null):ICollectionView
Provides access to a node's children. Returns a collection
of children if they exist. If the node is an Object, the method
returns the contents of the object's children field as
an ArrayCollection.
If the node is XML, the method returns an XMLListCollection containing
the child elements.
Parameters
| node:Object — The node object currently being evaluated.
|
| |
| model:Object (default = null) |
Returns
public function getData(node:Object, model:Object = null):Object
Returns a node's data.
Currently returns the entire node.
Parameters
| node:Object — The node object currently being evaluated.
|
| |
| model:Object (default = null) |
Returns
public function getGroupName(node:Object):String
Returns the name of the radio button group to which
the node belongs, if any.
This method is used by menu-based controls.
Parameters
| node:Object — The node for which to get the group name.
|
Returns
| String — The value of the node's groupName
attribute or field, or an empty string if there is no such
entry.
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public function getType(node:Object):String
Returns the type identifier of a node.
This method is used by menu-based controls to determine if the
node represents a separator, radio button,
a check box, or normal item.
Parameters
| node:Object — The node object for which to get the type.
|
Returns
| String — The value of the type attribute or field,
or the empty string if there is no such field.
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public function hasChildren(node:Object, model:Object = null):Boolean
Determines if the node actually has children.
Parameters
| node:Object — The node object currently being evaluated.
|
| |
| model:Object (default = null) |
Returns
| Boolean — true if this node currently has children.
|
public function isBranch(node:Object, model:Object = null):Boolean
Tests a node for termination.
Branches are non-terminating but are not required to have any leaf nodes.
If the node is XML, returns true if the node has children
or a true isBranch attribute.
If the node is an object, returns true if the node has a
(possibly empty) children field.
Parameters
| node:Object — The node object currently being evaluated.
|
| |
| model:Object (default = null) |
Returns
| Boolean — true if this node is non-terminating.
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public function isEnabled(node:Object):Boolean
Returns whether the node is enabled.
This method is used by menu-based controls.
Parameters
| node:Object — The node for which to get the status.
|
Returns
| Boolean — The value of the node's enabled
attribute or field, or true if there is no such
entry or the value is not false.
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public function isToggled(node:Object):Boolean
Returns whether the node is toggled.
This method is used by menu-based controls.
Parameters
| node:Object — The node for which to get the status.
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Returns
| Boolean — The value of the node's toggled
attribute or field, or false if there is no such
entry.
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public function removeChildAt(parent:Object, child:Object, index:int, model:Object = null):Boolean
Removes the child node from a node at the specified index.
If the parent parameter is null
or undefined, the method uses the model parameter to
access the child; otherwise, it uses the parent parameter
and ignores the model parameter.
Parameters
| parent:Object — The node object that currently parents the child node.
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| child:Object — The node that is being removed.
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| index:int — The 0-based index of the child node to remove relative to the parent.
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| model:Object (default = null) |
Returns
| Boolean — true if successful.
|
public function setEnabled(node:Object, value:Boolean):void
Sets the value of the field or attribute in the data provider
that identifies whether the node is enabled.
This method sets the value of the node's enabled
attribute or field.
This method is used by menu-based controls.
Parameters
| node:Object — The node for which to set the status.
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| value:Boolean — Whether the node is enabled.
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public function setToggled(node:Object, value:Boolean):void
Sets the value of the field or attribute in the data provider
that identifies whether the node is toggled.
This method sets the value of the node's toggled
attribute or field.
This method is used by menu-based controls.
Parameters
| node:Object — The node for which to set the status.
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| value:Boolean — Whether the node is toggled.
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