Package org.eclipse.gef.zest.fx.models

Class NavigationModel

java.lang.Object

org.eclipse.gef.zest.fx.models.NavigationModel

public class NavigationModel
extends Object

The NavigationModel manages a Set of Graphs for which the next layout pass should be skipped (due to transformation or navigation changes). Moreover, it manages a Map saving a NavigationModel.ViewportState per Graph, so that the scroll position and zoom factor can be restored when navigating nested graphs.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	NavigationModel.ViewportState	Representation of a viewport's state, which manifests itself in x and y translation, width and height, as well as a contents transform.

Constructor Summary

Constructors

Constructor	Description
NavigationModel()	Default constructor.

Method Summary

Modifier and Type	Method	Description
NavigationModel.ViewportState	getViewportState(Graph graph)	Retrieves the NavigationModel.ViewportState that is currently saved for the given Graph.
void	removeViewportState(Graph graph)	Removes the NavigationModel.ViewportState for the given Graph.
void	setViewportState(Graph graph, NavigationModel.ViewportState state)	Saves the given NavigationModel.ViewportState for the given Graph.

Methods inherited from class java.lang.Object

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

Constructor Details

NavigationModel

public NavigationModel()

Default constructor.

Method Details

getViewportState

public NavigationModel.ViewportState getViewportState(Graph graph)

Retrieves the NavigationModel.ViewportState that is currently saved for the given Graph.

Parameters:

graph - The Graph of which the saved NavigationModel.ViewportState is returned.

Returns:

The NavigationModel.ViewportState that was saved for the given Graph.

removeViewportState

public void removeViewportState(Graph graph)

Removes the NavigationModel.ViewportState for the given Graph.

Parameters:

graph - The Graph for which to remove the NavigationModel.ViewportState.

setViewportState

public void setViewportState(Graph graph,
 NavigationModel.ViewportState state)

Saves the given NavigationModel.ViewportState for the given Graph.

Parameters:

graph - The Graph for which to save a NavigationModel.ViewportState.

state - The NavigationModel.ViewportState that is saved for the given Graph.