| ComponentEvent |
|
typedict |
| |
A
ComponentEvent
is a low level event that indicates a component has been hidden,
moved, resized, or shown.
The only field in a
ComponentEvent
is:
| id |
An
Object
that must be an
int
or
String,
that identifies the type of this event.
A value that is a
String
must be the name of an event handler that can process this event.
A value that is an
int
must be a number that the
yoix.event.HandlerID
dictionary associates with an event handler that can process this event.
In practice,
id
is only used when you build an event that gets handed to
postEvent,
and in that case the value assigned to
id
is almost always a
String.
|
Most components can receive
ComponentEvents,
but they only arrive if the component has defined
one or more of the event handlers listed below.
| |
| Event Handlers: |
componentHidden,
componentMoved,
componentResized,
componentShown
| | |
| Example: |
The program,
import yoix.*.*;
JFrame frame = {
componentHidden(Event e) {
puts("Received componentHidden");
}
componentMoved(Event e) {
puts("Received componentMoved");
}
};
frame.visible = TRUE;
sleep(2);
ComponentEvent event = {
String id = "componentMoved";
};
printf("Posting %s\n", event.id);
postEvent(event, frame);
sleep(2);
frame.visible = FALSE;
sleep(2);
prints something like
Posting componentMoved
Received componentMoved
Received componentHidden
on standard output.
The first componentMoved event is a real one,
and happens when the frame is made visible for the first time.
| | |
| See Also: |
ActionEvent,
AdjustmentEvent,
CaretEvent,
ChangeEvent,
DragGestureEvent,
DragSourceEvent,
DropTargetEvent,
Event,
FocusEvent,
HyperlinkEvent,
InvocationEvent,
invokeLater,
isDispatchThread,
ItemEvent,
KeyEvent,
ListSelectionEvent,
MouseEvent,
MouseWheelEvent,
PaintEvent,
postEvent,
TextEvent,
TreeSelectionEvent,
WindowEvent
|
|
Yoix is a registered trademark of AT&T Intellectual Property.
|
