Package org.eclipse.graphiti.pattern

Class CreateConnectionFeatureForPattern

java.lang.Object

org.eclipse.graphiti.features.impl.AbstractFeature

org.eclipse.graphiti.features.impl.AbstractCreateConnectionFeature

org.eclipse.graphiti.pattern.CreateConnectionFeatureForPattern

All Implemented Interfaces:

ICreateConnectionFeature, ICustomAbortableUndoRedoFeature, ICustomUndoRedoFeature, IFeature, IFeatureProviderHolder, ICreateConnection, ICreateInfo, IDescription, IName

public class CreateConnectionFeatureForPattern
extends AbstractCreateConnectionFeature
implements ICustomAbortableUndoRedoFeature

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

Constructor Summary

Constructors

Constructor	Description
CreateConnectionFeatureForPattern(IFeatureProvider featureProvider, IConnectionPattern pattern)	Creates a new CreateConnectionFeatureForPattern.

Method Summary

Modifier and Type	Method	Description
void	attachedToSource(ICreateConnectionContext context)	Will called after a connection was successfully attached to an anchor of a source object. Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction.
void	canceledAttaching(ICreateConnectionContext context)	Will called if the connection creation process was canceled after the successful attachment of the connection to an anchor of a source object.
boolean	canCreate(ICreateConnectionContext context)	Can create.
boolean	canRedo(IContext context)	Decides if the processed feature can be re-done.
boolean	canStartConnection(ICreateConnectionContext context)	Can start connection.
boolean	canUndo(IContext context)	Decides if the current feature can be undone - this is the undo of the execute operation.
Connection	create(ICreateConnectionContext context)	Creates the connection.
void	endConnecting()	Will called after a connection creation tool from the palette was deselected. Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction.
String	getCreateImageId()	Gets the create image id.
String	getCreateLargeImageId()	Gets the create large image id.
IConnectionPattern	getPattern()	Gets the pattern.
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.
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.
void	startConnecting()	Will called after a connection creation tool from the palette was selected. Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction.

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

canExecute, execute, getCreateDescription, getCreateName, getName

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 Details

CreateConnectionFeatureForPattern

public CreateConnectionFeatureForPattern(IFeatureProvider featureProvider,
 IConnectionPattern pattern)

Creates a new CreateConnectionFeatureForPattern.

Parameters:

featureProvider - the feature provider

pattern - the connection pattern

Method Details

canCreate

public boolean canCreate(ICreateConnectionContext context)

Description copied from interface: ICreateConnection

Can create.

Specified by:

canCreate in interface ICreateConnection

Parameters:

context - the context

Returns:

true, if successful

canStartConnection

public boolean canStartConnection(ICreateConnectionContext context)

Description copied from interface: ICreateConnection

Can start connection.

Specified by:

canStartConnection in interface ICreateConnection

Parameters:

context - the context

Returns:

true, if successful

create

public Connection create(ICreateConnectionContext context)

Description copied from interface: ICreateConnection

Creates the connection.

Specified by:

create in interface ICreateConnection

Parameters:

context - the context

Returns:

The connection that has been created or null in case no valid connection can be returned. Currently this return value is not evaluated by the Graphiti framework but it might be used in future versions but only for performance optimizations.

getCreateImageId

public String getCreateImageId()

Description copied from interface: ICreateInfo

Gets the create image id.

Specified by:

getCreateImageId in interface ICreateInfo

Overrides:

getCreateImageId in class AbstractCreateConnectionFeature

Returns:

image for UI representation

getCreateLargeImageId

public String getCreateLargeImageId()

Description copied from interface: ICreateInfo

Gets the create large image id.

Specified by:

getCreateLargeImageId in interface ICreateInfo

Overrides:

getCreateLargeImageId in class AbstractCreateConnectionFeature

Returns:

large image for UI representation

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

startConnecting

public void startConnecting()

Description copied from interface: ICreateConnection

Will called after a connection creation tool from the palette was selected.
Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction. In case you want to modify the model (EMF domain objects or Graphiti pictogram objects) you need to do that within a command executed on the editor's command stack to make sure that the modification happens inside an EMF write transaction. Keep in mind that any changes you do within such a command will be create a seperate entry in the undo/redo stack for the editor, which might not be the desired effect.

Specified by:

startConnecting in interface ICreateConnection

Overrides:

startConnecting in class AbstractCreateConnectionFeature

endConnecting

public void endConnecting()

Description copied from interface: ICreateConnection

Will called after a connection creation tool from the palette was deselected.
Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction. In case you want to modify the model (EMF domain objects or Graphiti pictogram objects) you need to do that within a command executed on the editor's command stack to make sure that the modification happens inside an EMF write transaction. Keep in mind that any changes you do within such a command will be create a seperate entry in the undo/redo stack for the editor, which might not be the desired effect.

Specified by:

endConnecting in interface ICreateConnection

Overrides:

endConnecting in class AbstractCreateConnectionFeature

attachedToSource

public void attachedToSource(ICreateConnectionContext context)

Description copied from interface: ICreateConnection

Will called after a connection was successfully attached to an anchor of a source object.
Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction. In case you want to modify the model (EMF domain objects or Graphiti pictogram objects) you need to do that within a command executed on the editor's command stack to make sure that the modification happens inside an EMF write transaction. Keep in mind that any changes you do within such a command will be create a seperate entry in the undo/redo stack for the editor, which might not be the desired effect.

Specified by:

attachedToSource in interface ICreateConnection

Overrides:

attachedToSource in class AbstractCreateConnectionFeature

Parameters:

context - the context

canceledAttaching

public void canceledAttaching(ICreateConnectionContext context)

Description copied from interface: ICreateConnection

Will called if the connection creation process was canceled after the successful attachment of the connection to an anchor of a source object. E.g. user pressed ESC, user clicked on an invalid target, focus was lost, ...
Note: In contrast to the standard feature methods like ICreateConnection.canCreate(ICreateConnectionContext) and ICreateConnection.create(ICreateConnectionContext) this method will not be called in the scope of an EMF transaction. In case you want to modify the model (EMF domain objects or Graphiti pictogram objects) you need to do that within a command executed on the editor's command stack to make sure that the modification happens inside an EMF write transaction. Keep in mind that any changes you do within such a command will be create a seperate entry in the undo/redo stack for the editor, which might not be the desired effect.

Specified by:

canceledAttaching in interface ICreateConnection

Overrides:

canceledAttaching in class AbstractCreateConnectionFeature

Parameters:

context - the context

getPattern

public IConnectionPattern getPattern()

Gets the pattern.

Returns:

the pattern

Since:

0.10