org.eclipse.gef4.zest.fx.behaviors

Class OpenParentGraphOnZoomBehavior

java.lang.Object

org.eclipse.gef4.mvc.behaviors.AbstractBehavior<javafx.scene.Node>

org.eclipse.gef4.zest.fx.behaviors.OpenParentGraphOnZoomBehavior

All Implemented Interfaces:

IActivatable, IAdaptable.Bound<IVisualPart<javafx.scene.Node,? extends javafx.scene.Node>>, IPropertyChangeNotifier, IBehavior<javafx.scene.Node>

public class OpenParentGraphOnZoomBehavior
extends AbstractBehavior<javafx.scene.Node>

The OpenParentGraphOnZoomBehavior handles the navigation to a parent graph when the user zooms out of a nested graph.

Field Summary

Fields inherited from class org.eclipse.gef4.mvc.behaviors.AbstractBehavior

pcs

Fields inherited from interface org.eclipse.gef4.common.activate.IActivatable

ACTIVE_PROPERTY

Constructor Summary

Constructors

Constructor and Description
OpenParentGraphOnZoomBehavior()

Method Summary

Modifier and Type	Method and Description
void	activate()
void	deactivate()
GraphRootPart	getHost()
protected NavigationPolicy	getSemanticZoomPolicy() Returns the NavigationPolicy that is installed on the IRootPart of the host.
protected void	onZoomLevelChange(double oldScale, double newScale) Called upon zoom level changes (reported by the ViewportModel).

Methods inherited from class org.eclipse.gef4.mvc.behaviors.AbstractBehavior

addFeedback, addFeedback, addHandles, addHandles, addPropertyChangeListener, getAdaptable, getFeedbackParts, getHandleParts, isActive, removeFeedback, removeHandles, removePropertyChangeListener, setAdaptable, switchAdaptableScopes

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

OpenParentGraphOnZoomBehavior

public OpenParentGraphOnZoomBehavior()

Method Detail

activate

public void activate()

Specified by:

activate in interface IActivatable

Overrides:

activate in class AbstractBehavior<javafx.scene.Node>

deactivate

public void deactivate()

Specified by:

deactivate in interface IActivatable

Overrides:

deactivate in class AbstractBehavior<javafx.scene.Node>

getHost

public GraphRootPart getHost()

Specified by:

getHost in interface IBehavior<javafx.scene.Node>

Overrides:

getHost in class AbstractBehavior<javafx.scene.Node>

getSemanticZoomPolicy

protected NavigationPolicy getSemanticZoomPolicy()

Returns the NavigationPolicy that is installed on the IRootPart of the host.

Returns:

The NavigationPolicy that is installed on the IRootPart of the host.

onZoomLevelChange

protected void onZoomLevelChange(double oldScale,
                                 double newScale)

Called upon zoom level changes (reported by the ViewportModel). If the host is nested inside a Node and the zoom level is changed below 0.7, then the Graph to which the nesting Node belongs is opened.

Parameters:

oldScale - The previous zoom level.

newScale - The new zoom level.