Interface com.sun.java.accessibility.AccessibleComponent
- Implementing Classes:
- JComponent.AccessibleJComponent, JFrame.AccessibleJFrame, JWindow.AccessibleJWindow, CellRendererPane.AccessibleCellRendererPane, JTable.AccessibleJTable.AccessibleJTableCell, JTree.AccessibleJTree.AccessibleJTreeNode, JDialog.AccessibleJDialog, JPopupMenu.WindowPopup.AccessibleWindowPopup, JApplet.AccessibleJApplet, Box.Filler.AccessibleBoxFiller, Box.AccessibleBox, JList.AccessibleJList.AccessibleJListChild, JComboBox.AccessibleJComboBox.AccessibleJComboBoxList, JTableHeader.AccessibleJTableHeader.AccessibleJTableHeaderEntry
- public abstract interface AccessibleComponent
The AccessibleComponent interface should be supported by any object
that is rendered on the screen. This interface provides the standard
mechanism for an assistive technology to determine and set the
graphical representation of an object. Applications can determine
if an object supports the AccessibleComponent interface by first
obtaining its AccessibleContext (see
Accessible) and
then calling the
getAccessibleComponent method of AccessibleContext. If the return
value is not null, the object supports this interface.
- See Also:
- Accessible, getAccessibleContext, AccessibleContext, getAccessibleComponent
Method Summary
|
void
|
addFocusListener(java.awt.event.FocusListener l)
Adds the specified focus listener to receive focus events from this
component. |
boolean
|
contains(java.awt.Point p)
Checks whether the specified point is within this object's bounds,
where the point's x and y coordinates are defined to be relative to the
coordinate system of the object. |
Accessible
|
getAccessibleAt(java.awt.Point p)
Returns the Accessible child, if one exists, contained at the local
coordinate Point. |
java.awt.Color
|
getBackground()
Get the background color of this object. |
java.awt.Rectangle
|
getBounds()
Gets the bounds of this object in the form of a Rectangle object.
|
java.awt.Cursor
|
getCursor()
Get the Cursor of this object. |
java.awt.Font
|
getFont()
Get the Font of this object. |
java.awt.FontMetrics
|
getFontMetrics(java.awt.Font f)
Get the FontMetrics of this object. |
java.awt.Color
|
getForeground()
Get the foreground color of this object. |
java.awt.Point
|
getLocation()
Gets the location of the object relative to the parent in the form
of a point specifying the object's top-left corner in the screen's
coordinate space. |
java.awt.Point
|
getLocationOnScreen()
Returns the location of the object on the screen. |
java.awt.Dimension
|
getSize()
Returns the size of this object in the form of a Dimension object.
|
boolean
|
isEnabled()
Determine if the object is enabled. |
boolean
|
isFocusTraversable()
Returns whether this object can accept focus or not. |
boolean
|
isShowing()
Determine if the object is showing. |
boolean
|
isVisible()
Determine if the object is visible. |
void
|
removeFocusListener(java.awt.event.FocusListener l)
Removes the specified focus listener so it no longer receives focus
events from this component. |
void
|
requestFocus()
Requests focus for this object. |
void
|
setBackground(java.awt.Color c)
Set the background color of this object. |
void
|
setBounds(java.awt.Rectangle r)
Sets the bounds of this object in the form of a Rectangle object.
|
void
|
setCursor(java.awt.Cursor cursor)
Set the Cursor of this object. |
void
|
setEnabled(boolean b)
Set the enabled state of the object. |
void
|
setFont(java.awt.Font f)
Set the Font of this object. |
void
|
setForeground(java.awt.Color c)
Set the foreground color of this object. |
void
|
setLocation(java.awt.Point p)
Sets the location of the object relative to the parent. |
void
|
setSize(java.awt.Dimension d)
Resizes this object so that it has width and height. |
void
|
setVisible(boolean b)
Set the visible state of the object. |
getBackground
public java.awt.Color getBackground()
- Get the background color of this object.
- Returns:
- the background color, if supported, of the object;
otherwise, null
- See Also:
- setBackground
setBackground
public void setBackground(java.awt.Color c)
- Set the background color of this object.
- Parameters:
c
- the new Color for the background- See Also:
- setBackground
getForeground
public java.awt.Color getForeground()
- Get the foreground color of this object.
- Returns:
- the foreground color, if supported, of the object;
otherwise, null
- See Also:
- setForeground
setForeground
public void setForeground(java.awt.Color c)
- Set the foreground color of this object.
- Parameters:
c
- the new Color for the foreground- See Also:
- getForeground
getCursor
public java.awt.Cursor getCursor()
- Get the Cursor of this object.
- Returns:
- the Cursor, if supported, of the object; otherwise, null
- See Also:
- setCursor
setCursor
public void setCursor(java.awt.Cursor cursor)
- Set the Cursor of this object.
- Parameters:
c
- the new Cursor for the object- See Also:
- getCursor
getFont
public java.awt.Font getFont()
- Get the Font of this object.
- Returns:
- the Font,if supported, for the object; otherwise, null
- See Also:
- setFont
setFont
public void setFont(java.awt.Font f)
- Set the Font of this object.
- Parameters:
f
- the new Font for the object- See Also:
- getFont
getFontMetrics
public java.awt.FontMetrics getFontMetrics(java.awt.Font f)
- Get the FontMetrics of this object.
- Parameters:
f
- the Font- Returns:
- the FontMetrics, if supported, the object; otherwise, null
- See Also:
- getFont
isEnabled
public boolean isEnabled()
- Determine if the object is enabled. Objects that are enabled
will also have the AccessibleState.ENABLED state set in their
AccessibleStateSet.
- Returns:
- true if object is enabled; otherwise, false
- See Also:
- setEnabled, getAccessibleStateSet, ENABLED, AccessibleStateSet
setEnabled
public void setEnabled(boolean b)
- Set the enabled state of the object.
- Parameters:
b
- if true, enables this object; otherwise, disables it- See Also:
- isEnabled
isVisible
public boolean isVisible()
- Determine if the object is visible. Note: this means that the
object intends to be visible; however, it may not be
showing on the screen because one of the objects that this object
is contained by is currently not visible. To determine if an object is
showing on the screen, use isShowing().
Objects that are visible will also have the
AccessibleState.VISIBLE state set in their AccessibleStateSet.
- Returns:
- true if object is visible; otherwise, false
- See Also:
- setVisible, getAccessibleStateSet, VISIBLE, AccessibleStateSet
setVisible
public void setVisible(boolean b)
- Set the visible state of the object.
- Parameters:
b
- if true, shows this object; otherwise, hides it- See Also:
- isVisible
isShowing
public boolean isShowing()
- Determine if the object is showing. This is determined by checking
the visibility of the object and visibility of the object ancestors.
Note: this
will return true even if the object is obscured by another (for example,
it to object is underneath a menu that was pulled down).
- Returns:
- true if object is showing; otherwise, false
contains
public boolean contains(java.awt.Point p)
- Checks whether the specified point is within this object's bounds,
where the point's x and y coordinates are defined to be relative to the
coordinate system of the object.
- Parameters:
p
- the Point relative to the coordinate system of the object- Returns:
- true if object contains Point; otherwise false
- See Also:
- getBounds
getLocationOnScreen
public java.awt.Point getLocationOnScreen()
- Returns the location of the object on the screen.
- Returns:
- location of object on screen; null if this object
is not on the screen
- See Also:
- getBounds, getLocation
getLocation
public java.awt.Point getLocation()
- Gets the location of the object relative to the parent in the form
of a point specifying the object's top-left corner in the screen's
coordinate space.
- Returns:
- An instance of Point representing the top-left corner of the
objects's bounds in the coordinate space of the screen; null if
this object or its parent are not on the screen
- See Also:
- getBounds, getLocationOnScreen
setLocation
public void setLocation(java.awt.Point p)
- Sets the location of the object relative to the parent.
- Parameters:
p
- the new position for the top-left corner- See Also:
- getLocation
getBounds
public java.awt.Rectangle getBounds()
- Gets the bounds of this object in the form of a Rectangle object.
The bounds specify this object's width, height, and location
relative to its parent.
- Returns:
- A rectangle indicating this component's bounds; null if
this object is not on the screen.
- See Also:
- contains
setBounds
public void setBounds(java.awt.Rectangle r)
- Sets the bounds of this object in the form of a Rectangle object.
The bounds specify this object's width, height, and location
relative to its parent.
- Parameters:
r
- rectangle indicating this component's bounds- See Also:
- getBounds
getSize
public java.awt.Dimension getSize()
- Returns the size of this object in the form of a Dimension object.
The height field of the Dimension object contains this objects's
height, and the width field of the Dimension object contains this
object's width.
- Returns:
- A Dimension object that indicates the size of this component;
null if this object is not on the screen
- See Also:
- setSize
setSize
public void setSize(java.awt.Dimension d)
- Resizes this object so that it has width and height.
- Parameters:
d
- - The dimension specifying the new size of the object.- See Also:
- getSize
getAccessibleAt
public Accessible getAccessibleAt(java.awt.Point p)
- Returns the Accessible child, if one exists, contained at the local
coordinate Point.
- Parameters:
p
- The point relative to the coordinate system of this object.- Returns:
- the Accessible, if it exists, at the specified location;
otherwise null
isFocusTraversable
public boolean isFocusTraversable()
- Returns whether this object can accept focus or not. Objects that
can accept focus will also have the AccessibleState.FOCUSABLE state
set in their AccessibleStateSet.
- Returns:
- true if object can accept focus; otherwise false
- See Also:
- getAccessibleStateSet, FOCUSABLE, FOCUSED, AccessibleStateSet
requestFocus
public void requestFocus()
- Requests focus for this object. If this object cannot accept focus,
nothing will happen. Otherwise, the object will attempt to take
focus.
- See Also:
- isFocusTraversable
addFocusListener
public void addFocusListener(java.awt.event.FocusListener l)
- Adds the specified focus listener to receive focus events from this
component.
- Parameters:
l
- the focus listener- See Also:
- removeFocusListener
removeFocusListener
public void removeFocusListener(java.awt.event.FocusListener l)
- Removes the specified focus listener so it no longer receives focus
events from this component.
- Parameters:
l
- the focus listener- See Also:
- addFocusListener
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