Common interface for items in an IGraph implementation that may own labels.
Inheritance Hierarchy
Implemented Interfaces
Remarks
Like all items in an
IGraph, this item supports the lookup method that can be used to query additional aspects of the item.Examples
// add a label to the owner
const label = graph.addLabel(owner, 'Some Text')
// the label's Owner property is set to the owner
console.log(label.owner === owner) // true
// the label is in its owner's Labels collection
console.log(owner.labels.includes(label)) // trueType Details
- yfiles module
- view-component
- yfiles-umd modules
- All view modules
- Legacy UMD name
- yfiles.graph.ILabelOwner
See Also
Properties
Gets a collection of labels that are owned by this instance.
Remarks
This gives access to a read-only live view of the labels, i.e. the collection can change over time, as well as the labels contained in it. If a snapshot of the current state is needed, one needs to copy the collection and its contents.
To modify the label collection for instances of the default implementations that were created via the factory methods on IGraph, use addLabel and remove.
Examples
// add label with given text, default style, and default placement
// and determine the preferred size automatically
const label1 = graph.addLabel(node, 'Some Label')
// add label with given text, placement, style, size, and tag (user object)
const label2 = graph.addLabel(
node,
'Some Label',
InteriorLabelModel.CENTER,
new DefaultLabelStyle(),
new Size(10, 150),
userObject
)
// add label with given text and style but default placement
// and determine the preferred size automatically
const label3 = graph.addLabel({
owner: node,
text: 'Some Label',
layoutParameter: InteriorLabelModel.CENTER,
style: new DefaultLabelStyle()
})for (const label of node.labels) {
// ...
}graph.remove(label)See Also
Gets or sets the tag associated with this instance.
Remarks
The tag is an optional user-defined object which can be used to store arbitrary data related to this item. The item itself does not normally depend on the tag associated with it. It serves as storage for the object only.
Examples
owner.tag = newTagconst tag = owner.tagSee Also
Nodes,
Edges,
Labels,
Ports,
Associating Data with Graph Elements,
Using Data Binding,
Adding Custom Data for Serialization,
Examples for Lookup Decoration
Implements
Methods
Returns an instance that implements the given type or null.
Remarks
Typically, this method will be called in order to obtain a different view or aspect of the current instance. This is quite similar to casting or using a super type or interface of this instance, but is not limited to inheritance or compile time constraints. An instance implementing this method is not required to return non-
null implementations for the types, nor does it have to return the same instance any time. Also it depends on the type and context whether the instance returned stays up to date or needs to be reobtained for subsequent use.Type Parameters
- T: any
Parameters
options - Object
A map of options to pass to the method.
A map of options to pass to the method.
- type - Class<T>
- The type for which an instance shall be returned.
Returns
- ↪T
- an instance that is assignable to type or
null
See Also
Note that the
$class property on JavaScript classes inheriting from yFiles classes is only valid once an instance of this subclass was created. Call fixType, first or instantiate the class at least once.