java.awt.event
public class HierarchyEvent extends AWTEvent
There are two types of hierarchy events. The first type is handled by HierarchyListener, and includes addition or removal of an ancestor, or an ancestor changing its on-screen status (visible and/or displayble). The second type is handled by HierarchyBoundsListener, and includes resizing or moving of an ancestor.
HierarchyListener
,
HierarchyBoundsAdapter
,
HierarchyBoundsListener
,
Serialized FormModifier and Type | Field and Description |
---|---|
static int |
ANCESTOR_MOVED
This id indicates that an ancestor was moved.
|
static int |
ANCESTOR_RESIZED
This id indicates that an ancestor was resized.
|
static int |
DISPLAYABILITY_CHANGED
This indicates that the HIERARCHY_CHANGED is caused by a change in
displayability.
|
static int |
HIERARCHY_CHANGED
This id indicates that the hierarchy tree changed.
|
static int |
HIERARCHY_FIRST
This is the first id in the range of ids used by this class.
|
static int |
HIERARCHY_LAST
This is the last id in the range of ids used by this class.
|
static int |
PARENT_CHANGED
This indicates that the HIERARCHY_CHANGED is a changed parent.
|
static int |
SHOWING_CHANGED
This indicates that the HIERARCHY_CHANGED is a changed visibility.
|
ACTION_EVENT_MASK, ADJUSTMENT_EVENT_MASK, COMPONENT_EVENT_MASK, consumed, CONTAINER_EVENT_MASK, FOCUS_EVENT_MASK, HIERARCHY_BOUNDS_EVENT_MASK, HIERARCHY_EVENT_MASK, id, 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
source
Constructor and Description |
---|
HierarchyEvent(Component source,
int id,
Component changed,
Container changedParent)
Initializes a new instance of
HierarchyEvent with the
specified parameters. |
HierarchyEvent(Component source,
int id,
Component changed,
Container changedParent,
long changeFlags)
Initializes a new instance of
HierarchyEvent with the
specified parameters. |
Modifier and Type | Method and Description |
---|---|
Component |
getChanged()
Returns the component at the top of the hierarchy which changed.
|
Container |
getChangedParent()
Returns the parent of the component listed in
getChanged() . |
long |
getChangeFlags()
If this is a HIERARCHY_CHANGED event, this returns a bitmask of the
types of changes that took place.
|
Component |
getComponent()
This method returns the event source as a
Component . |
String |
paramString()
This method returns a string identifying this event.
|
getSource
public static final int HIERARCHY_FIRST
public static final int HIERARCHY_CHANGED
public static final int ANCESTOR_MOVED
public static final int ANCESTOR_RESIZED
public static final int HIERARCHY_LAST
public static final int PARENT_CHANGED
public static final int DISPLAYABILITY_CHANGED
public static final int SHOWING_CHANGED
public HierarchyEvent(Component source, int id, Component changed, Container changedParent)
HierarchyEvent
with the
specified parameters. Note that an invalid id leads to unspecified
results.source
- the component whose hierarchy changedid
- the event idchanged
- the top component in the tree of changed hierarchychangedParent
- the updated parent of this objectIllegalArgumentException
- if source is nullpublic HierarchyEvent(Component source, int id, Component changed, Container changedParent, long changeFlags)
HierarchyEvent
with the
specified parameters. Note that an invalid id leads to unspecified
results.source
- the component whose hierarchy changedid
- the event idchanged
- the top component in the tree of changed hierarchychangedParent
- the updated parent of this objectchangeFlags
- the bitmask of specific HIERARCHY_CHANGED eventsIllegalArgumentException
- if source is nullpublic Component getComponent()
Component
. If the
source has subsequently been modified to a non-Component, this returns
null.Component
, or nullpublic Component getChanged()
public Container getChangedParent()
getChanged()
.
If the cause of this event was Container.add
, this is the
new parent; if the cause was Container.remove
, this is the
old parent; otherwise it is the unchanged parent.public long getChangeFlags()
PARENT_CHANGED
,
DISPLAYABILITY_CHANGED
,
SHOWING_CHANGED
public String paramString()
paramString
in class AWTEvent