Package org.eclipse.graphiti.pattern

Class LayoutFeatureForPattern

java.lang.Object

org.eclipse.graphiti.features.impl.AbstractFeature

org.eclipse.graphiti.features.impl.AbstractLayoutFeature

org.eclipse.graphiti.pattern.LayoutFeatureForPattern

All Implemented Interfaces:

ICustomAbortableUndoRedoFeature, ICustomUndoRedoFeature, IFeature, IFeatureProviderHolder, ILayoutFeature, ILayout, IDescription, IName

public class LayoutFeatureForPattern
extends AbstractLayoutFeature
implements ICustomAbortableUndoRedoFeature

This feature wraps the layout functionality of a pattern for calls of the Graphiti framework. Clients should not need to use this class directly.

Constructor Summary

Constructors

Constructor	Description
LayoutFeatureForPattern(IFeatureProvider featureProvider, IPattern pattern)	Creates a new LayoutFeatureForPattern.

Method Summary

Modifier and Type	Method	Description
boolean	canLayout(ILayoutContext context)	Checks whether the current pictogram element of the given context can be layouted.
boolean	canRedo(IContext context)	Decides if the processed feature can be re-done.
boolean	canUndo(IContext context)	Decides if the current feature can be undone - this is the undo of the execute operation.
boolean	isAbort()	The Graphiti framework will call this method after ICustomUndoRedoFeature.preUndo(org.eclipse.graphiti.features.context.IContext)/ ICustomUndoRedoFeature.preRedo(org.eclipse.graphiti.features.context.IContext) have been called and before the actual undo/redo operation is triggered.
boolean	layout(ILayoutContext context)	Layoutes the pictogram element.
void	postRedo(IContext context)	This method will be called by the Graphiti framework after the EMF undo has finished.
void	postUndo(IContext context)	This method will be called by the Graphiti framework after the EMF undo is finished.
void	preRedo(IContext context)	This method will be called by the Graphiti framework before the EMF undo has triggered.
void	preUndo(IContext context)	This method will be called by the Graphiti framework before the EMF undo is triggered.

Methods inherited from class org.eclipse.graphiti.features.impl.AbstractLayoutFeature

canExecute, canLayoutPictogramElement, execute, getName, resizeShape

Methods inherited from class org.eclipse.graphiti.features.impl.AbstractFeature

addGraphicalRepresentation, getAllBusinessObjectsForPictogramElement, getBusinessObjectForPictogramElement, getDescription, getDiagram, getDiagramBehavior, getFeatureProvider, getProgressCallback, getUserDecision, hasDoneChanges, isAvailable, layoutPictogramElement, link, link, manageColor, manageColor, manageDefaultFont, manageFont, manageFont, setProgressCallback, toString, updatePictogramElement

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.eclipse.graphiti.IDescription

getDescription

Methods inherited from interface org.eclipse.graphiti.features.IFeature

hasDoneChanges, isAvailable

Methods inherited from interface org.eclipse.graphiti.features.IFeatureProviderHolder

getFeatureProvider

Constructor Detail

LayoutFeatureForPattern

public LayoutFeatureForPattern(IFeatureProvider featureProvider,
                               IPattern pattern)

Creates a new LayoutFeatureForPattern.

Parameters:

featureProvider - the feature provider

pattern - the pattern

Method Detail

canLayout

public boolean canLayout(ILayoutContext context)

Description copied from interface: ILayout

Checks whether the current pictogram element of the given context can be layouted.

Specified by:

canLayout in interface ILayout

Parameters:

context - the context

Returns:

true if update is possible

layout

public boolean layout(ILayoutContext context)

Description copied from interface: ILayout

Layoutes the pictogram element.

Specified by:

layout in interface ILayout

Parameters:

context - the context

Returns:

true, if update process was successfull

isAbort

public boolean isAbort()

Description copied from interface: ICustomAbortableUndoRedoFeature

The Graphiti framework will call this method after ICustomUndoRedoFeature.preUndo(org.eclipse.graphiti.features.context.IContext)/ ICustomUndoRedoFeature.preRedo(org.eclipse.graphiti.features.context.IContext) have been called and before the actual undo/redo operation is triggered. In case this method returns true, the operation will be cancelled by the Graphiti framework by throwing an OperationCanceledException that causes am EMF revert of the operation.

Implementing classes might e.g. set a flag in ICustomUndoRedoFeature.preUndo(org.eclipse.graphiti.features.context.IContext)/ ICustomUndoRedoFeature.preRedo(org.eclipse.graphiti.features.context.IContext) as cancellation indication and check that that flag here.

Specified by:

isAbort in interface ICustomAbortableUndoRedoFeature

Returns:

true in case you want to cancel the current operation, false otherwise.

Since:

0.12

canUndo

public boolean canUndo(IContext context)

Description copied from interface: IFeature

Decides if the current feature can be undone - this is the undo of the execute operation.

Specified by:

canUndo in interface ICustomUndoRedoFeature

Specified by:

canUndo in interface IFeature

Overrides:

canUndo in class AbstractFeature

Parameters:

context - this is the general input for this method

Returns:

true if the feature can be undone, false if not

See Also:

IContext

preUndo

public void preUndo(IContext context)

Description copied from interface: ICustomUndoRedoFeature

This method will be called by the Graphiti framework before the EMF undo is triggered. Customers may revert their non-EMF changes done by the feature here or in ICustomUndoRedoFeature.postUndo(IContext).

Specified by:

preUndo in interface ICustomUndoRedoFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Since:

0.12

postUndo

public void postUndo(IContext context)

Description copied from interface: ICustomUndoRedoFeature

This method will be called by the Graphiti framework after the EMF undo is finished. Customers may revert their non-EMF changes done by the feature here or in ICustomUndoRedoFeature.preUndo(IContext).

Specified by:

postUndo in interface ICustomUndoRedoFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Since:

0.12

canRedo

public boolean canRedo(IContext context)

Description copied from interface: ICustomUndoRedoFeature

Decides if the processed feature can be re-done. This method is called once by the Graphiti framework just before any redo work is started, e.g. before ICustomUndoRedoFeature.preRedo(IContext).

Note that as soon as any feature reports false here, also all consecutive entries in the command stack are no longer reachable for redo.

Specified by:

canRedo in interface ICustomUndoRedoFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Returns:

true if the feature can be re-done, false if not

Since:

0.8

preRedo

public void preRedo(IContext context)

Description copied from interface: ICustomUndoRedoFeature

This method will be called by the Graphiti framework before the EMF undo has triggered. Customers may re-apply their non-EMF changes done by the feature here or in ICustomUndoRedoFeature.postRedo(IContext). (Usually it might be sufficient to delegate to the execution method of the feature.)

Specified by:

preRedo in interface ICustomUndoRedoFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Since:

0.12

postRedo

public void postRedo(IContext context)

Description copied from interface: ICustomUndoRedoFeature

This method will be called by the Graphiti framework after the EMF undo has finished. Customers may re-apply their non-EMF changes done by the feature here or in ICustomUndoRedoFeature.preRedo(IContext). (Usually it might be sufficient to delegate to the execution method of the feature.)

Specified by:

postRedo in interface ICustomUndoRedoFeature

Parameters:

context - this is the instance of the IContext object that was in use when executing the feature

Since:

0.12