Interface used by IGraph and the like to declare and obtain the defaults for labels.
Inheritance Hierarchy
ILabelDefaults
Remarks
Note that changing these defaults does not change properties of already created model items. Rather, only items created after the change are affected.
Examples
// Labels on nodes, edges, and ports have different ILabelDefaults instances.
// These can be retrieved from their owner type's defaults
// the defaults for node labels can be set on the ILabelDefaults instance
// found at the Labels property of the node defaults
graph.nodeDefaults.labels.layoutParameter = InteriorNodeLabelModel.CENTER
graph.nodeDefaults.labels.style = new LabelStyle()
// the defaults for edge labels can be set on the ILabelDefaults instance
// found at the Labels property of the edge defaults
graph.edgeDefaults.labels.layoutParameter =
new EdgeSegmentLabelModel().createParameterFromCenter()
graph.edgeDefaults.labels.style = new LabelStyle()
// defaults for port labels can be set on the ILabelDefaults instance
// found at the Labels property of their owner type's defaults
graph.nodeDefaults.ports.labels.layoutParameter =
new InsideOutsidePortLabelModel().createInsideParameter()
graph.edgeDefaults.ports.labels.layoutParameter =
FreePortLabelModel.CENTERType Details
- yFiles module
- view
See Also
INodeDefaults.labels,
IEdgeDefaults.labels,
IGraph.nodeDefaults,
IGraph.edgeDefaults,
IGraph.groupNodeDefaults
Properties
Gets or sets a property that determines whether to automatically adjust the preferred size of a label.
Remarks
On a call to setLabelText or setStyle, the preferred size of the label will automatically be adjusted to the preferred size that is suggested by the label's style renderer, if this property is set to
true.Examples
const node = graph.createNodeAt(new Point(0, 0))
const label = graph.addLabel(node, 'Text')
const preferredSize1 = label.preferredSize
// enable auto adjust
graph.nodeDefaults.labels.autoAdjustPreferredSize = true
graph.setLabelText(label, 'Another Label Text')
const preferredSize2 = label.preferredSize
// preferred size has been adjusted to changed text
console.log(preferredSize1.equals(preferredSize2)) // false
// disable auto adjust
graph.nodeDefaults.labels.autoAdjustPreferredSize = false
graph.setLabelText(label, 'x')
const preferredSize3 = label.preferredSize
// preferred size has not been adjusted to changed text
console.log(preferredSize2.equals(preferredSize3)) // true
// adjusting the preferred size can be triggered manually, though
graph.adjustLabelPreferredSize(label)See Also
Gets or sets the label model parameter to use for labels.
Remarks
Depending on the setting of shareLayoutParameterInstance, the getLayoutParameterInstance method should return a clone of this instance or the very same instance.
Property Value
The parameter to use as a template.
Examples
graph.nodeDefaults.labels.layoutParameter = InteriorNodeLabelModel.CENTER
graph.nodeDefaults.labels.style = new LabelStyle()See Also
Gets or sets the style to use for labels.
Remarks
Depending on the setting of shareStyleInstance, the getStyleInstance method should return a clone of this instance or the very same instance.
Property Value
The style to use as a template.
Examples
graph.nodeDefaults.labels.layoutParameter = InteriorNodeLabelModel.CENTER
graph.nodeDefaults.labels.style = new LabelStyle()See Also
Methods
Factory method that returns a label model parameter instance for use with newly created labels.
Remarks
Most implementations will yield either, a clone of or the layoutParameter property, if shareLayoutParameterInstance is enabled, but they might use more complicated logic, too.
Parameters
options - Object
A map of options to pass to the method.
A map of options to pass to the method.
- owner - ILabelOwner
- The owner of the label that will be created.
Returns
- ↪ILabelModelParameter
- The parameter to use, which for most implementations is either a clone of or the layoutParameter property, if shareLayoutParameterInstance is enabled.
Factory method that returns a style instance for use with newly created labels.
Remarks
Most implementations will yield either, a clone of or the style property, if shareStyleInstance is enabled, but they might use more complicated logic, too.
Parameters
options - Object
A map of options to pass to the method.
A map of options to pass to the method.
- owner - ILabelOwner
- The owner of the label that will be created.
Returns
- ↪ILabelStyle
- The style to use, which for most implementations is either a clone of or the style property, if shareStyleInstance is enabled.