com.webobjects.eointerface
Class EOActionInsertionAssociation

java.lang.Object
  com.webobjects.eocontrol.EODelayedObserver
      com.webobjects.eointerface.EOAssociation
          com.webobjects.eointerface.EOWidgetAssociation
              com.webobjects.eointerface.EOActionWidgetAssociation
                  com.webobjects.eointerface.EOActionInsertionAssociation

All Implemented Interfaces:

EOObserving, NSDisposable

public class EOActionInsertionAssociation
extends EOActionWidgetAssociation

An EOActionInsertionAssociation object inserts objects from one display group into another.

Usable With:
com.webobjects.eointerface.swing: Any object that implements the method addActionListener (javax.swing.JButton and javax.swing.JMenuItem, for example).
com.webobjects.eointerface.cocoa: Any object that responds to setAction, typically an NSControl.

Aspects:

source	Bound to the EODisplayGroup containing objects to insert. This aspect doesn't use a key.
destination	A relationship of the selected object, into which objects from the source EODisplayGroup are inserted. Usually bound to a different EODisplayGroup than source.
enabled	A boolean attribute of the selected object (usually in the destination EODisplayGroup), which determines whether the NSControl is enabled.

Example:

Suppose an application shows Talent in one display group and Movies in another. You want a user to be able to select a talent, select a movie, and then click an Assign Director button that assigns the selected talent as one of the movie's directors. To do this, in Interface Builder, control-drag a connection from the button to the Talent display group. Select EOActionInsertionAssociation in the Connections inspector, and double-click the association's source aspect, binding it to the Talent display group. Similarly, control-drag a connection from the button to the Movie display group. Select EOActionAssociation in the Connections inspector, and bind the association's destination aspect to the "directors" key. Now, when the user clicks the button, the selected Talent is added to the directors relationship of the selected Movie. If more than one talent is selected, both are added to the relationship. If more than one Movie is selected, the selected talent are added to the relationship of the first Movie in the selection.

Nested Class Summary

Nested classes/interfaces inherited from class com.webobjects.eointerface.EOActionWidgetAssociation

EOActionWidgetAssociation.ActionPlugin

Nested classes/interfaces inherited from class com.webobjects.eointerface.EOWidgetAssociation

EOWidgetAssociation.WidgetPlugin

Field Summary

Fields inherited from class com.webobjects.eointerface.EOAssociation

ActionAspect, ArgumentAspect, AttributeAspectSignature, AttributeToManyAspectSignature, AttributeToOneAspectSignature, AttributeToOneToManyAspectSignature, BackgroundColorAspect, BoldAspect, ChildrenAspect, DestinationAspect, EnabledAspect, ExpandedIconAspect, IconAspect, IgnoreValue, IsLeafAspect, ItalicAspect, MatchKey1Aspect, MatchKey2Aspect, MatchKey3Aspect, NullAspectSignature, ParentAspect, RootAspect, SelectedIndexAspect, SelectedObjectAspect, SelectedTitleAspect, SetValue, SourceAspect, TextColorAspect, TitlesAspect, ToManyAspectSignature, ToOneAspectSignature, ToOneToManyAspectSignature, UnsetValue, URLAspect, ValueAspect

Fields inherited from class com.webobjects.eocontrol.EODelayedObserver

ObserverNumberOfPriorities, ObserverPriorityFifth, ObserverPriorityFirst, ObserverPriorityFourth, ObserverPriorityImmediate, ObserverPriorityLater, ObserverPrioritySecond, ObserverPrioritySixth, ObserverPriorityThird

Constructor Summary

EOActionInsertionAssociation(Object aDisplayObject)
Creates a new EOActionInsertionAssociation to monitor and update the value in aDisplayObject, typically a button or menu item.

Method Summary

protected boolean	displayGroupSelectionsAllowEnabled() Returns whether or not the set of selected items in the action display group allows for this association to perform its action.
void	invokeAction() Invoked by the receiver's plugin when its display object is acted upon.
String	primaryAspect() Returns the primary aspect this association gets bound to.

Methods inherited from class com.webobjects.eointerface.EOActionWidgetAssociation

isEnabled, isEnabledAtIndex, subjectChanged, widgetPluginClass

Methods inherited from class com.webobjects.eointerface.EOWidgetAssociation

canSupportValueFormatter, defaultPrefersContinuousChangeNotification, dispose, isUsableWithObject, objectKeysTaken, prefersContinuousChangeNotification, setDefaultPrefersContinuousChangeNotification, setObject, setPrefersContinuousChangeNotification, setValueFormatter, valueFormatter, widgetPlugin

Methods inherited from class com.webobjects.eointerface.EOAssociation

aspects, aspectSignatures, associationClassesForObject, bindAspect, breakConnection, copyMatchingBindingsFromAssociation, displayGroupForAspect, displayGroupKeyForAspect, endEditing, establishConnection, isConnected, isExplicitlyDisabled, object, priority, registerAssociationClass, setExplicitlyDisabled, setValueForAspect, setValueForAspectAtIndex, shouldEndEditing, shouldEndEditingAtIndex, valueForAspect, valueForAspectAtIndex

Methods inherited from class com.webobjects.eocontrol.EODelayedObserver

discardPendingNotification, objectWillChange, observerQueue

Methods inherited from class java.lang.Object

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

Constructor Detail

EOActionInsertionAssociation

public EOActionInsertionAssociation(Object aDisplayObject)

Creates a new EOActionInsertionAssociation to monitor and update the value in aDisplayObject, typically a button or menu item.

You normally set up associations in Interface Builder, in which case you don't need to create them programmatically. However, if you do create them up programmatically, setting them up is a multi-step process. After creating an association, you must bind its aspects and establish its connections.

Parameters:

aDisplayObject - display object for this association to manage.

See Also:

EOAssociation.bindAspect(java.lang.String, com.webobjects.eointerface.EODisplayGroup, java.lang.String), EOAssociation.establishConnection()

Method Detail

invokeAction

public void invokeAction()

Invoked by the receiver's plugin when its display object is acted upon. Adds the selected objects of the source display group to the relationship of the selected object of the destination display group with the name of the key used to bind the destination aspect.

Specified by:

invokeAction in class EOActionWidgetAssociation

displayGroupSelectionsAllowEnabled

protected boolean displayGroupSelectionsAllowEnabled()

Returns whether or not the set of selected items in the action display group allows for this association to perform its action. If true, then the action can be invoked, otherwise nothing will happen when the invokeAction method is called on this association.

Overrides:

displayGroupSelectionsAllowEnabled in class EOActionWidgetAssociation

Returns:

true if the action display group selection is not empty and destination aspect is bound and there is exactly one object selected in it; false otherwise

primaryAspect

public String primaryAspect()

Returns the primary aspect this association gets bound to.

Overrides:

primaryAspect in class EOAssociation

Returns:

EOAssociaion.SourceAspect