uic.action
Class ListDeselectionAction

java.lang.Object
  uic.model.UICSimpleAction
      uic.action.SwingAction
          uic.action.ListDeselectionAction

All Implemented Interfaces:

EventListener, ListSelectionListener

public class ListDeselectionAction
extends SwingAction
implements ListSelectionListener

Notify you if the user deselects the last entry in a list or table. If you supply a table or list with a selection-type that allows unselecting of all items you will get an event when there are no selected items anymore. Notice that the default version uses the OnlyLastPolicy. Using this class is easy; just call:

new ListDeselectionAction(this, "selectedSlot").add(myList); 

This has the result that when the user clicks on the list the method 'selectedSlot' on object 'this' will be called.

Default target signatures

(ARGUMENT_SOURCE)
()

All Targets

ARGUMENT_SOURCE

Since:

2.0

Nested Class Summary

Nested classes/interfaces inherited from class uic.model.UICSimpleAction

UICSimpleAction.Arguments, UICSimpleAction.DirectMultiThreadingPolicy, UICSimpleAction.DirectPolicy, UICSimpleAction.ExecutePolicy, UICSimpleAction.OnlyLastPolicy, UICSimpleAction.QueuedPolicy, UICSimpleAction.SimpleQueuedPolicy

Field Summary

static String

ARGUMENT_SOURCE an Object: the source object that threw the event (a ListSelectionModel).

Fields inherited from class uic.action.SwingAction

updateUICommmand

Fields inherited from class uic.model.UICSimpleAction

currentPolicy, target, targetObject

Constructor Summary

ListDeselectionAction(Object targetObject, String targetMethod)
Create a new ListDeselectionAction

ListDeselectionAction(Object targetObject, String targetMethod, UICSimpleAction.Arguments arguments)
Create a new ListDeselectionAction.

Method Summary

ListDeselectionAction	add(JList list) Add an ItemSelectable object to this action
ListDeselectionAction	add(JTable table) Add an ItemSelectable object to this action
protected Class	getArgumentClass(String argumentType) For the uniquely defined argumentType (as also used in UICSimpleAction.getTargetSignatures()) return the Class.
protected Object	getArgumentValue(EventObject source, String argumentType) For the uniquely defined argumentType (as also used in UICSimpleAction.getTargetSignatures()) return the value.
protected List	getTargetSignatures() Return a List object with instances of the Arguments class.
void	valueChanged(ListSelectionEvent e) Implementation of ListSelectionListener interface.

Methods inherited from class uic.action.SwingAction

doAction, getComponentsIterator, registerComponent, setEnabled, setUIUpdateCommand, setUIUpdateCommand

Methods inherited from class uic.model.UICSimpleAction

createArguments, equals, execute, execute, execute, execute, isEnabled, setDirect, setExecutionPolicy, setTarget, setTarget

Methods inherited from class java.lang.Object

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

Field Detail

ARGUMENT_SOURCE

public static final String ARGUMENT_SOURCE

an Object: the source object that threw the event (a ListSelectionModel).

See Also:

Constant Field Values

Constructor Detail

ListDeselectionAction

public ListDeselectionAction(Object targetObject,
                             String targetMethod)

Create a new ListDeselectionAction

Parameters:

targetObject - on which object should the target method be invoked

targetMethod - wich method on the targetObject should be invoked

ListDeselectionAction

public ListDeselectionAction(Object targetObject,
                             String targetMethod,
                             UICSimpleAction.Arguments arguments)

Create a new ListDeselectionAction.

Parameters:

targetObject - on which object should the target method be invoked

targetMethod - wich method on the targetObject should be invoked

arguments - to be used in finding the targetMethod signature

See Also:

UICSimpleAction.setTarget(Object,String,uic.model.UICSimpleAction.Arguments)

Method Detail

add

public ListDeselectionAction add(JList list)

Add an ItemSelectable object to this action

Parameters:

list - the list that triggers this action

add

public ListDeselectionAction add(JTable table)

Add an ItemSelectable object to this action

Parameters:

table - the table that triggers this action

getTargetSignatures

protected List getTargetSignatures()

Description copied from class: UICSimpleAction

Return a List object with instances of the Arguments class. Extending classes should implement this to return all the target method signatures that are searched for should the user create an action without an Arguments instance.

An example implementation could be this:

  List result = new ArrayList(1);
  result.add( new Arguments().addArgument("Source") );
  return result;

This will result in a call to UICSimpleAction.getArgumentClass(java.lang.String) with the string "Source" which returns a Class instance. In our example that would be java.lang.Object.

The result of this would be that a call to setTarget will try to find a method with an argument of type Object, and will search again if that is not found without any arguments.

Overrides:

getTargetSignatures in class UICSimpleAction

Returns:

a List object with instances of the Arguments class.

See Also:

UICSimpleAction.getArgumentValue(java.util.EventObject, java.lang.String), UICSimpleAction.getArgumentClass(java.lang.String)

getArgumentValue

protected Object getArgumentValue(EventObject source,
                                  String argumentType)

Description copied from class: UICSimpleAction

For the uniquely defined argumentType (as also used in UICSimpleAction.getTargetSignatures()) return the value. This method will always return 'null'; Extending actions can define various argumentType strings that can be used as an argument in the call to the target method of this action. The user decides on construction of the action which argumentTypes are to be used, if a certain value is requested to be sent to the targetMethod a call is made to this method to find its value based on the source event.

Note that base types can not be returned, since they are instances of object; you should wrap these in their object re-presentation (an Integer object for an int).

Overrides:

getArgumentValue in class UICSimpleAction

Parameters:

source - the event that caused the action to be fired. This is the event that the extending class passed to the execute method; so casting is fine.

argumentType - the uniquely defined name specifying the type of argument.

Returns:

the value to be passed to the taget method.

getArgumentClass

protected Class getArgumentClass(String argumentType)

Description copied from class: UICSimpleAction

For the uniquely defined argumentType (as also used in UICSimpleAction.getTargetSignatures()) return the Class. This method will always return 'null'; Extending actions can define various argumentType strings that can be used as an argument in the call to the target method of this action. The user decides on construction of the action which argumentTypes are to be used, if a certain value is requested to be sent to the targetMethod a call is made to this method to find the Class of the type.

Note that basetypes have a class of their own and you should return the correct one you expect the targetMethod to implement. returning Integer.class will search for an Integer; returing int.class will search for an int. This is important to note since the UICSimpleAction.getArgumentValue(java.util.EventObject, java.lang.String) method should return an Integer object in both cases.

Overrides:

getArgumentClass in class UICSimpleAction

Parameters:

argumentType - the uniquely defined name specifying the type of argument.

Returns:

the class of this argument to be found on the target method

valueChanged

public void valueChanged(ListSelectionEvent e)

Implementation of ListSelectionListener interface.

Specified by:

valueChanged in interface ListSelectionListener

Throws:

IllegalStateException - if the event is not coming from the AWT event thread.