org.eclipse.graphiti.pattern

Class DirectEditingFeatureForPattern

java.lang.Object

org.eclipse.graphiti.features.impl.AbstractFeature

org.eclipse.graphiti.features.impl.AbstractDirectEditingFeature

org.eclipse.graphiti.pattern.DirectEditingFeatureForPattern

All Implemented Interfaces:

ICustomAbortableUndoRedoFeature, ICustomUndoRedoFeature, IDirectEditingFeature, IFeature, IFeatureProviderHolder, IDirectEditing, IDescription, IName

public class DirectEditingFeatureForPattern
extends AbstractDirectEditingFeature
implements ICustomAbortableUndoRedoFeature

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

Field Summary

Fields inherited from interface org.eclipse.graphiti.func.IDirectEditing

TYPE_CUSTOM, TYPE_DROPDOWN, TYPE_DROPDOWN_READ_ONLY, TYPE_MULTILINETEXT, TYPE_NONE, TYPE_TEXT

Constructor Summary

Constructors

Constructor and Description
DirectEditingFeatureForPattern(IFeatureProvider featureProvider, IDirectEditing pattern) Creates a new DirectEditingFeatureForPattern.

Method Summary

Modifier and Type	Method and Description
boolean	canDirectEdit(IDirectEditingContext context) Checks if the feature can perform direct editing on the context handed over.
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.
java.lang.String	checkValueValid(java.lang.String value, IDirectEditingContext context) This method will be called by clients many times to see if current value is valid and could be set.
java.lang.String	completeValue(java.lang.String value, int caretPos, java.lang.String choosenValue, IDirectEditingContext context) Framework calls this method to let the feature calculate the new value.
int	getEditingType() Framework calls this method to decide which UI to show up.
java.lang.String	getInitialValue(IDirectEditingContext context) Provides the initial value for the opened text editing UI component.
java.lang.String[]	getPossibleValues(IDirectEditingContext context) This value will be used if the cell editor is a combo box.
IProposalSupport	getProposalSupport() The direct editing mode contains controls for code completion and the selection from a combo box.
java.lang.String[]	getValueProposals(java.lang.String value, int caretPos, IDirectEditingContext context) This proposals will be used for the completion list of a simple text cell editor.
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	isAutoCompletionEnabled() Checks if auto completion is enabled.
boolean	isCompletionAvailable() Checks if completion is available.
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	setValue(java.lang.String value, IDirectEditingContext context) Set the new value.
boolean	stretchFieldToFitText() Stretch input field to fit its contents.

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

canExecute, execute, getName, hasDoneChanges, setValueChanged

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

getDescription, getFeatureProvider, isAvailable, manageFont, manageFont, setProgressCallback, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

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

isAvailable

Methods inherited from interface org.eclipse.graphiti.IDescription

getDescription

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

getFeatureProvider

Constructor Detail

DirectEditingFeatureForPattern

public DirectEditingFeatureForPattern(IFeatureProvider featureProvider,
                                      IDirectEditing pattern)

Creates a new DirectEditingFeatureForPattern.

Parameters:

featureProvider - the feature provider

pattern - the pattern

Method Detail

canDirectEdit

public boolean canDirectEdit(IDirectEditingContext context)

Description copied from interface: IDirectEditing

Checks if the feature can perform direct editing on the context handed over.

Specified by:

canDirectEdit in interface IDirectEditing

Overrides:

canDirectEdit in class AbstractDirectEditingFeature

Parameters:

context - the context

Returns:

This method is equivalent to

See Also:

IFeature.canExecute(org.eclipse.graphiti.features.context.IContext)

checkValueValid

public java.lang.String checkValueValid(java.lang.String value,
                                        IDirectEditingContext context)

Description copied from interface: IDirectEditing

This method will be called by clients many times to see if current value is valid and could be set.

Specified by:

checkValueValid in interface IDirectEditing

Overrides:

checkValueValid in class AbstractDirectEditingFeature

Parameters:

value - the value

context - the context

Returns:

null if value is okay and could be set; any text means value is not valid; text is reason for invalidality

completeValue

public java.lang.String completeValue(java.lang.String value,
                                      int caretPos,
                                      java.lang.String choosenValue,
                                      IDirectEditingContext context)

Description copied from interface: IDirectEditing

Framework calls this method to let the feature calculate the new value.

Specified by:

completeValue in interface IDirectEditing

Overrides:

completeValue in class AbstractDirectEditingFeature

Parameters:

value - current value

caretPos - current cursor position

choosenValue - value choosen by user

context - the context

Returns:

the new value

getPossibleValues

public java.lang.String[] getPossibleValues(IDirectEditingContext context)

Description copied from interface: IDirectEditing

This value will be used if the cell editor is a combo box. This functionality only applies to TYPE_DROPDOWN.

Specified by:

getPossibleValues in interface IDirectEditing

Overrides:

getPossibleValues in class AbstractDirectEditingFeature

Parameters:

context - the context

Returns:

the possible values for the combo box.

getValueProposals

public java.lang.String[] getValueProposals(java.lang.String value,
                                            int caretPos,
                                            IDirectEditingContext context)

Description copied from interface: IDirectEditing

This proposals will be used for the completion list of a simple text cell editor. This functionality only applies to TYPE_TEXT.

Specified by:

getValueProposals in interface IDirectEditing

Overrides:

getValueProposals in class AbstractDirectEditingFeature

Parameters:

value - current value

caretPos - current cursor position

context - the context

Returns:

the proposed values

isAutoCompletionEnabled

public boolean isAutoCompletionEnabled()

Description copied from interface: IDirectEditing

Checks if auto completion is enabled. This functionality only applies to TYPE_TEXT.

Specified by:

isAutoCompletionEnabled in interface IDirectEditing

Overrides:

isAutoCompletionEnabled in class AbstractDirectEditingFeature

Returns:

true, if proposals should appear automatically

isCompletionAvailable

public boolean isCompletionAvailable()

Description copied from interface: IDirectEditing

Checks if completion is available. This functionality only applies to TYPE_TEXT.

Specified by:

isCompletionAvailable in interface IDirectEditing

Overrides:

isCompletionAvailable in class AbstractDirectEditingFeature

Returns:

true if completion is / proposals are available at all

stretchFieldToFitText

public boolean stretchFieldToFitText()

Description copied from interface: IDirectEditing

Stretch input field to fit its contents. This functionality applies to TYPE_TEXT, TYPE_DROPDOWN and TYPE_DROPDOWN_READ_ONLY.

Specified by:

stretchFieldToFitText in interface IDirectEditing

Overrides:

stretchFieldToFitText in class AbstractDirectEditingFeature

Returns:

true if the field should exactly fit the contents

getEditingType

public int getEditingType()

Description copied from interface: IDirectEditing

Framework calls this method to decide which UI to show up.

Specified by:

getEditingType in interface IDirectEditing

Returns:

the editing type

getInitialValue

public java.lang.String getInitialValue(IDirectEditingContext context)

Description copied from interface: IDirectEditing

Provides the initial value for the opened text editing UI component.

Specified by:

getInitialValue in interface IDirectEditing

Parameters:

context - the context

Returns:

the initial value

setValue

public void setValue(java.lang.String value,
                     IDirectEditingContext context)

Description copied from interface: IDirectEditing

Set the new value. The value comes from the text editing UI component.

Specified by:

setValue in interface IDirectEditing

Overrides:

setValue in class AbstractDirectEditingFeature

Parameters:

value - the value

context - the context

getProposalSupport

public IProposalSupport getProposalSupport()

Description copied from interface: IDirectEditing

The direct editing mode contains controls for code completion and the selection from a combo box. In both cases the standard implementation supports only strings.

If the customer wants to work with Objects he must provide an implementation of IProposalSupport. In this case the following methods of IDirectEditing are ignored:


* String checkValueValid(String value, IDirectEditingContext context);
* String completeValue(String value, int caretPosition, String choosenValue, IDirectEditingContext context);
* String[] getPossibleValues(IDirectEditingContext context);
* String[] getValueProposals(String value, int caretPosition, IDirectEditingContext context);
* void setValue(String value, IDirectEditingContext context);

Specified by:

getProposalSupport in interface IDirectEditing

Overrides:

getProposalSupport in class AbstractDirectEditingFeature

Returns:

the special implementation to support Objects in code completion and combo box

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