The XAccessibleComponent interface should be supported by
any class that can be rendered on the screen.
This interface provides the standard mechanism for an assistive
technology to retrieve information concerning the graphical
representation of an object. This interface combines methods from
the Java interfaces javax.accessibility.AccessibleComponent
and javax.accessibility.AccessibleExtendedComponent .
Further information about the graphical appearance of an object can
be expressed with the XAccessibleExtendedComponent
interface.
Coordinates used by the functions of this interface are specified in
different coordinate systems. Their scale is the same and is equal to
that of the screen coordiante system. In other words all coordinates
are measured in pixel. They differ in their respective origin:
The screen coordinate system has its origin in the upper left
corner of the current screen. Used by the
getLocationOnScreen() function.
The origin of the parent coordinate system is the upper left corner
of the parent's bounding box. With no parent the screen coordinate
system is used instead. Used by the getLocation()
function.
The object coordinate system is relative to the upper left corner of
an object's bounding box. It is relative to itself so to speak. Used
by the contains() and
getAccessibleAt() functions.
Key bindings which are associated with an accessible component can be
retrieved at the component's action. The reason for this is that key
bindings are associated with actions and directly with a component.
This distinction becomes important when there are more than one action.
To get access to the key bindings you have to get the
XAccessibleAction interface of a component, provided that
it is supported, and use the getAccessibleKeyBinding() .
Tests whether the specified point lies within this object's bounds.
The test point's coordinates are defined relative to the
coordinate system of the object. That means that when the object is
an opaque rectangle then both the points (0,0) and (with-1,height-1)
would yield a true value.
Parameter point
Coordinates of the point to test. The origin of the coordinate
system is the upper left corner of the object's bounding box as
returned by the . The scale of the
coordinate system is identical to that of the screen coordiante
system.
Returns
Returns true if the point lies within or on the object's bounding
box and false otherwise.
Returns the Accessible child that is rendered under the given point.
The test point's coordinates are defined relative to the
coordinate system of the object. That means that when the object is
an opaque rectangle then both the points (0,0) and (with-1,height-1)
would yield a true value.
Parameter aPoint
Coordinates of the test point for which to find the Accessible
child. The origin of the coordinate system is the upper left
corner of the object's bounding box as returned by the
. The scale of the coordinate
system is identical to that of the screen coordiante system.
Returns
If there is one child which is rendered so that its bounding box
contains the test point then a reference to that object is
returned. If there is more than one child which satisfies that
condition then a reference to that one is returned that is
painted on top of the others. If no there is no child which is
rendered at the test point an empty reference is returned.
The returned bounding box has the form of a rectangle. Its
coordinates are relative to the object's parent coordinate system.
Note that the two methods getLocation and
getSize return the same information. With method
getLocationOnScreen you can get the bound box
position in screen coordinates.
Returns
The coordinates of the returned rectangle are relative to this
object's parent or relative to the screen on which this object
is rendered if it has no parent. If the object is not on any
screen the returnred rectangle is empty and located at position
(0,0).
Returns the location of the upper left corner of the object's
bounding box relative to the parent.
The coordinates of the bounding box are given relative to the
parent's coordinate system.
Returns
The coordinates of the returned position are relative to this
object's parent or relative to the screen on which this object
is rendered if it has no parent. If the object is not on any
screen the returnred position is (0,0).
Returns the location of the upper left corner of the object's
bounding box in screen coordinates.
This method returns the same point as does the method
getLocation . The difference is that the
coordinates are absolute screen coordinates of the screen to which
the object is rendered instead of being relative to the object's
parent.
Returns
The coordinates of the returned position are relative to the
screen on which this object is rendered. If the object is not
on any screen the returnred position is (0,0).
If this object can not accept the focus,
i.e. isFocusTraversable returns false for this
object then nothing happens. Otherwise the object will attempt to
take the focus. Nothing happens if that fails, otherwise the object
has the focus. This method is called requestFocus in
the Java Accessibility API 1.4.
