java.awt.event
Class FocusEvent
- Serializable
This class represents an event generated when a focus change occurs for a
component. There are both temporary changes, such as when focus is stolen
during a sroll then returned, and permanent changes, such as when the user
TABs through focusable components.
static int | FOCUS_FIRST- This is the first id in the range of ids used by this class.
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static int | FOCUS_GAINED- This is the event id for a focus gained event.
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static int | FOCUS_LAST- This is the last id in the range of ids used by this class.
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static int | FOCUS_LOST- This is the event id for a focus lost event.
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ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, INPUT_METHOD_EVENT_MASK, INVOCATION_EVENT_MASK, ITEM_EVENT_MASK, KEY_EVENT_MASK, MOUSE_EVENT_MASK, MOUSE_MOTION_EVENT_MASK, MOUSE_WHEEL_EVENT_MASK, PAINT_EVENT_MASK, RESERVED_ID_MAX, TEXT_EVENT_MASK, WINDOW_EVENT_MASK, WINDOW_FOCUS_EVENT_MASK, WINDOW_STATE_EVENT_MASK, consumed, id |
FocusEvent(Component source, int id)- Initializes a new instance of
FocusEvent with the
specified source and id.
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FocusEvent(Component source, int id, boolean temporary)- Initializes a new instance of
FocusEvent with the
specified source, id, and temporary status.
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FocusEvent(Component source, int id, boolean temporary, Component opposite)- Initializes a new instance of
FocusEvent with the
specified source, id, temporary status, and opposite counterpart.
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clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait |
FOCUS_FIRST
public static final int FOCUS_FIRST
This is the first id in the range of ids used by this class.
FOCUS_GAINED
public static final int FOCUS_GAINED
This is the event id for a focus gained event.
FOCUS_LAST
public static final int FOCUS_LAST
This is the last id in the range of ids used by this class.
FOCUS_LOST
public static final int FOCUS_LOST
This is the event id for a focus lost event.
FocusEvent
public FocusEvent(Component source,
int id) Initializes a new instance of FocusEvent with the
specified source and id. Note that an invalid id leads to unspecified
results.
source - the component that is gaining or losing focusid - the event id
FocusEvent
public FocusEvent(Component source,
int id,
boolean temporary) Initializes a new instance of FocusEvent with the
specified source, id, and temporary status. Note that an invalid id
leads to unspecified results.
source - the component that is gaining or losing focusid - the event idtemporary - true if the focus change is temporary
FocusEvent
public FocusEvent(Component source,
int id,
boolean temporary,
Component opposite) Initializes a new instance of FocusEvent with the
specified source, id, temporary status, and opposite counterpart. Note
that an invalid id leads to unspecified results.
source - the component that is gaining or losing focusid - the event idtemporary - true if the focus change is temporaryopposite - the component receiving the opposite focus event, or null
getOppositeComponent
public Component getOppositeComponent()
Returns the component which received the opposite focus event. If this
component gained focus, the opposite lost focus; likewise if this
component is giving up focus, the opposite is gaining it. If this
information is unknown, perhaps because the opposite is a native
application, this returns null.
- the component with the focus opposite, or null
isTemporary
public boolean isTemporary()
This method tests whether or not the focus change is temporary or
permanent.
- true if the focus change is temporary
paramString
public String paramString()
Returns a string identifying this event. This is formatted as:
(getID() == FOCUS_GAINED ? "FOCUS_GAINED" : "FOCUS_LOST")
+ (isTemporary() ? ",temporary," : ",permanent,") + "opposite="
+ getOppositeComponent().
- paramString in interface ComponentEvent
- a string identifying this event
FocusEvent.java -- generated for a focus change
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