jdk.awt.event.ItemEvent
A semantic event which indicates that an item was selected or deselected. This high-level event is generated by an ItemSelectable object (such as a List) when an item is selected or deselected by the user. The event is passed to every ItemListener object which registered to receive such events using the component's addItemListener method.
The object that implements the ItemListener interface gets this ItemEvent when the event occurs. The listener is spared the details of processing individual mouse movements and mouse clicks, and can instead process a "meaningful" (semantic) event like "item selected" or "item deselected".
An unspecified behavior will be caused if the id parameter of any particular ItemEvent instance is not in the range from ITEM_FIRST to ITEM_LAST.
The stateChange of any ItemEvent instance takes one of the following values:
ItemEvent.SELECTED
ItemEvent.DESELECTED
Assigning the value different from listed above will cause an unspecified behavior.
A semantic event which indicates that an item was selected or deselected.
This high-level event is generated by an ItemSelectable object (such as a
List) when an item is selected or deselected by the user.
The event is passed to every ItemListener object which
registered to receive such events using the component's
addItemListener method.
The object that implements the ItemListener interface gets
this ItemEvent when the event occurs. The listener is
spared the details of processing individual mouse movements and mouse
clicks, and can instead process a "meaningful" (semantic) event like
"item selected" or "item deselected".
An unspecified behavior will be caused if the id parameter
of any particular ItemEvent instance is not
in the range from ITEM_FIRST to ITEM_LAST.
The stateChange of any ItemEvent instance takes one of the following
values:
ItemEvent.SELECTED
ItemEvent.DESELECTED
Assigning the value different from listed above will cause an unspecified behavior.*-deselectedclj
Static Constant.
This state-change-value indicates that a selected item was deselected.
type: int
Static Constant. This state-change-value indicates that a selected item was deselected. type: int
*-item-firstclj
Static Constant.
The first number in the range of ids used for item events.
type: int
Static Constant. The first number in the range of ids used for item events. type: int
*-item-lastclj
Static Constant.
The last number in the range of ids used for item events.
type: int
Static Constant. The last number in the range of ids used for item events. type: int
*-item-state-changedclj
Static Constant.
This event id indicates that an item's state changed.
type: int
Static Constant. This event id indicates that an item's state changed. type: int
*-selectedclj
Static Constant.
This state-change value indicates that an item was selected.
type: int
Static Constant. This state-change value indicates that an item was selected. type: int
->item-eventclj
(->item-event source id item state-change)Constructor.
Constructs an ItemEvent object. This method throws an IllegalArgumentException if source is null.
source - The ItemSelectable object that originated the event - java.awt.ItemSelectable
id - The integer that identifies the event type. For information on allowable values, see the class description for ItemEvent - int
item - An object -- the item affected by the event - java.lang.Object
state-change - An integer that indicates whether the item was selected or deselected. For information on allowable values, see the class description for ItemEvent - int
throws: java.lang.IllegalArgumentException - if source is null
Constructor. Constructs an ItemEvent object. This method throws an IllegalArgumentException if source is null. source - The ItemSelectable object that originated the event - `java.awt.ItemSelectable` id - The integer that identifies the event type. For information on allowable values, see the class description for ItemEvent - `int` item - An object -- the item affected by the event - `java.lang.Object` state-change - An integer that indicates whether the item was selected or deselected. For information on allowable values, see the class description for ItemEvent - `int` throws: java.lang.IllegalArgumentException - if source is null
get-itemclj
(get-item this)Returns the item affected by the event.
returns: the item (object) that was affected by the event - java.lang.Object
Returns the item affected by the event. returns: the item (object) that was affected by the event - `java.lang.Object`
get-item-selectableclj
(get-item-selectable this)Returns the originator of the event.
returns: the ItemSelectable object that originated the event. - java.awt.ItemSelectable
Returns the originator of the event. returns: the ItemSelectable object that originated the event. - `java.awt.ItemSelectable`
get-state-changeclj
(get-state-change this)Returns the type of state change (selected or deselected).
returns: an integer that indicates whether the item was selected
or deselected - int
Returns the type of state change (selected or deselected).
returns: an integer that indicates whether the item was selected
or deselected - `int`param-stringclj
(param-string this)Returns a parameter string identifying this item event. This method is useful for event-logging and for debugging.
returns: a string identifying the event and its attributes - java.lang.String
Returns a parameter string identifying this item event. This method is useful for event-logging and for debugging. returns: a string identifying the event and its attributes - `java.lang.String`
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