org.eclipse.gef4.mvc.fx.policies

Class FXChangeViewportPolicy

java.lang.Object

org.eclipse.gef4.mvc.policies.AbstractPolicy<VR>

org.eclipse.gef4.mvc.policies.AbstractTransactionPolicy<javafx.scene.Node>

org.eclipse.gef4.mvc.fx.policies.FXChangeViewportPolicy

All Implemented Interfaces:

IAdaptable.Bound<IVisualPart<javafx.scene.Node,? extends javafx.scene.Node>>, IPolicy<javafx.scene.Node>

public class FXChangeViewportPolicy
extends AbstractTransactionPolicy<javafx.scene.Node>

A transactional IPolicy to change the viewport of an IViewer via its InfiniteCanvas.

Constructor Summary

Constructors

Constructor and Description
FXChangeViewportPolicy()

Method Summary

Modifier and Type	Method and Description
protected ITransactionalOperation	createOperation() Creates an ITransactionalOperation that is used to encapsulate the changes that are applied by this AbstractTransactionPolicy through its "work" methods.
protected FXChangeViewportOperation	getChangeViewportOperation() Returns an FXChangeViewportOperation that is extracted from the operation created by createOperation().
void	scrollRelative(double deltaTranslateX, double deltaTranslateY) Advances the viewport transformation by the given translation values.
void	zoomRelative(double relativeZoom, double sceneX, double sceneY) Concatenates a scaling transformation to the current viewport transformation.

Methods inherited from class org.eclipse.gef4.mvc.policies.AbstractTransactionPolicy

checkInitialized, commit, getOperation, init, isInitialized, locallyExecuteOperation, rollback

Methods inherited from class org.eclipse.gef4.mvc.policies.AbstractPolicy

getAdaptable, getHost, setAdaptable

Methods inherited from class java.lang.Object

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

Constructor Detail

FXChangeViewportPolicy

public FXChangeViewportPolicy()

Method Detail

createOperation

protected ITransactionalOperation createOperation()

Description copied from class: AbstractTransactionPolicy

Creates an ITransactionalOperation that is used to encapsulate the changes that are applied by this AbstractTransactionPolicy through its "work" methods. The created operation should allow for local execution at each time.

Specified by:

createOperation in class AbstractTransactionPolicy<javafx.scene.Node>

Returns:

A new ITransactionalOperation to encapsulate all applied changes.

getChangeViewportOperation

protected FXChangeViewportOperation getChangeViewportOperation()

Returns an FXChangeViewportOperation that is extracted from the operation created by createOperation().

Returns:

An FXChangeViewportOperation that is extracted from the operation created by createOperation().

scrollRelative

public void scrollRelative(double deltaTranslateX,
                           double deltaTranslateY)

Advances the viewport transformation by the given translation values.

Parameters:

deltaTranslateX - The horizontal translation delta.

deltaTranslateY - The vertical translation delta.

zoomRelative

public void zoomRelative(double relativeZoom,
                         double sceneX,
                         double sceneY)

Concatenates a scaling transformation to the current viewport transformation.

Parameters:

relativeZoom - The scale factor.

sceneX - The pivot x-coordinate.

sceneY - The pivot y-coordinate.