java.awt

Class Component.AccessibleAWTComponent

java.lang.Object
- javax.accessibility.AccessibleContext
- - java.awt.Component.AccessibleAWTComponent

Enclosing Class:: Component

Implemented Interfaces:: AccessibleComponent, Serializable

Known Direct Subclasses:: Box.Filler.AccessibleBoxFiller, Button.AccessibleAWTButton, Canvas.AccessibleAWTCanvas, Checkbox.AccessibleAWTCheckbox, Choice.AccessibleAWTChoice, Container.AccessibleAWTContainer, Label.AccessibleAWTLabel, List.AccessibleAWTList, List.AccessibleAWTList.AccessibleAWTListChild, Scrollbar.AccessibleAWTScrollBar, TextComponent.AccessibleAWTTextComponent

protected abstract class Component.AccessibleAWTComponent

extends AccessibleContext

implements Serializable, AccessibleComponent

This class provides accessibility support for subclasses of container.

Since:: 1.3

See Also:: Serialized Form

Nested Class Summary
`protected class`	`Component.AccessibleAWTComponent.AccessibleAWTComponentHandler` Converts component changes into property changes.
`protected class`	`Component.AccessibleAWTComponent.AccessibleAWTFocusHandler` Converts focus changes into property changes.

Field Summary
`protected ComponentListener`	`accessibleAWTComponentHandler` Converts show/hide events to PropertyChange events, and is registered as a component listener on this component.
`protected FocusListener`	`accessibleAWTFocusHandler` Converts focus events to PropertyChange events, and is registered as a focus listener on this component.

Constructor Summary
`AccessibleAWTComponent()` The default constructor.

Method Summary
`void`	`addFocusListener(FocusListener l)` Adds a focus listener.
`void`	`addPropertyChangeListener(PropertyChangeListener l)` Adds a global property change listener to the accessible component.
`boolean`	`contains(Point p)` Tests if the point is contained in this component.
`Accessible`	`getAccessibleAt(Point p)` Returns the Accessible child at a point relative to the coordinate system of this component, if one exists, or null.
`Accessible`	`getAccessibleChild(int i)` Returns the ith accessible child.
`int`	`getAccessibleChildrenCount()` Returns the number of children of this component which implement Accessible.
`AccessibleComponent`	`getAccessibleComponent()` Returns this, since it is an accessible component.
`String`	`getAccessibleDescription()` Returns a brief description of this accessible context.
`int`	`getAccessibleIndexInParent()` Returns the index of this component in its accessible parent.
`String`	`getAccessibleName()` Returns the accessible name of this component.
`Accessible`	`getAccessibleParent()` Returns the parent of this component, if it is accessible.
`AccessibleRole`	`getAccessibleRole()` Returns the role of this component.
`AccessibleStateSet`	`getAccessibleStateSet()` Returns a state set describing this component's state.
`Color`	`getBackground()` Gets the background color.
`Rectangle`	`getBounds()` Gets the bounds of this component, or null if it is not on screen.
`Cursor`	`getCursor()` Gets the cursor.
`Font`	`getFont()` Gets the font.
`FontMetrics`	`getFontMetrics(Font f)` Gets the font metrics for a font.
`Color`	`getForeground()` Gets the foreground color.
`Locale`	`getLocale()` Returns the locale of this component.
`Point`	`getLocation()` Returns the location of this object relative to its parent's coordinate system, or null if it is not showing.
`Point`	`getLocationOnScreen()` Returns the location of this object on the screen, or null if it is not showing.
`Dimension`	`getSize()` Gets the size of this component, or null if it is not showing.
`boolean`	`isEnabled()` Tests if the component is enabled.
`boolean`	`isFocusTraversable()` Tests whether this component can accept focus.
`boolean`	`isShowing()` Tests if the component is showing.
`boolean`	`isVisible()` Test whether the component is visible (not necesarily showing).
`void`	`removeFocusListener(FocusListener l)` Removes a focus listener.
`void`	`removePropertyChangeListener(PropertyChangeListener l)` Removes a global property change listener from this accessible component.
`void`	`requestFocus()` Requests focus for this component.
`void`	`setBackground(Color c)` Sets the background color.
`void`	`setBounds(Rectangle r)` Sets the bounds of this component.
`void`	`setCursor(Cursor cursor)` Sets the cursor.
`void`	`setEnabled(boolean b)` Set whether the component is enabled.
`void`	`setFont(Font f)` Sets the font.
`void`	`setForeground(Color c)` Sets the foreground color.
`void`	`setLocation(Point p)` Sets the location of this relative to its parent's coordinate system.
`void`	`setSize(Dimension d)` Sets the size of this component.
`void`	`setVisible(boolean b)` Sets the visibility of this component.

Methods inherited from class java.lang.Object
`clone`, `equals`, `extends Object> getClass`, `finalize`, `hashCode`, `notify`, `notifyAll`, `toString`, `wait`, `wait`, `wait`

accessibleAWTComponentHandler

protected ComponentListener accessibleAWTComponentHandler

Converts show/hide events to PropertyChange events, and is registered as a component listener on this component.

accessibleAWTFocusHandler

protected FocusListener accessibleAWTFocusHandler

Converts focus events to PropertyChange events, and is registered as a focus listener on this component.

AccessibleAWTComponent

protected AccessibleAWTComponent()

The default constructor.

addFocusListener

public void addFocusListener(FocusListener l)

Adds a focus listener.
Specified by:
addFocusListener in interface AccessibleComponent
Parameters:
l - the listener to add

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener l)

Adds a global property change listener to the accessible component.
Overrides:
addPropertyChangeListener in interface AccessibleContext
Parameters:
l - the listener to add
See Also:
AccessibleContext.ACCESSIBLE_NAME_PROPERTY, AccessibleContext.ACCESSIBLE_DESCRIPTION_PROPERTY, AccessibleContext.ACCESSIBLE_STATE_PROPERTY, AccessibleContext.ACCESSIBLE_VALUE_PROPERTY, AccessibleContext.ACCESSIBLE_SELECTION_PROPERTY, AccessibleContext.ACCESSIBLE_TEXT_PROPERTY, AccessibleContext.ACCESSIBLE_VISIBLE_DATA_PROPERTY

contains

public boolean contains(Point p)

Tests if the point is contained in this component.
Specified by:
contains in interface AccessibleComponent
Parameters:
p - the point to check
Returns:
true if it is contained
Throws:
NullPointerException - if p is null

getAccessibleAt

public Accessible getAccessibleAt(Point p)

Returns the Accessible child at a point relative to the coordinate system of this component, if one exists, or null. Since components have no children, subclasses must override this to get anything besides null.
Specified by:
getAccessibleAt in interface AccessibleComponent
Parameters:
p - the point to check
Returns:
the accessible child at that point
Throws:
NullPointerException - if p is null

getAccessibleChild

public Accessible getAccessibleChild(int i)

Returns the ith accessible child. Subclasses must override this if they can have children.
Overrides:
getAccessibleChild in interface AccessibleContext
Returns:
the ith accessible child, or null
See Also:
getAccessibleChildrenCount()

getAccessibleChildrenCount

public int getAccessibleChildrenCount()

Returns the number of children of this component which implement Accessible. Subclasses must override this if they can have children.
Overrides:
getAccessibleChildrenCount in interface AccessibleContext
Returns:
the number of accessible children, default 0

getAccessibleComponent

public AccessibleComponent getAccessibleComponent()

Returns this, since it is an accessible component.
Overrides:
getAccessibleComponent in interface AccessibleContext
Returns:
the accessible component

getAccessibleDescription

public String getAccessibleDescription()

Returns a brief description of this accessible context. This should be localized.
Overrides:
getAccessibleDescription in interface AccessibleContext
Returns:
a description of this component
See Also:
setAccessibleDescription(String)

getAccessibleIndexInParent

public int getAccessibleIndexInParent()

Returns the index of this component in its accessible parent.
Overrides:
getAccessibleIndexInParent in interface AccessibleContext
Returns:
the index, or -1 if the parent is not accessible
See Also:
getAccessibleParent()

getAccessibleName

public String getAccessibleName()

Returns the accessible name of this component. It is almost always wrong to return getName(), since it is not localized. In fact, for things like buttons, this should be the text of the button, not the name of the object. The tooltip text might also be appropriate.
Overrides:
getAccessibleName in interface AccessibleContext
Returns:
the name
See Also:
setAccessibleName(String)

getAccessibleParent

public Accessible getAccessibleParent()

Returns the parent of this component, if it is accessible.
Overrides:
getAccessibleParent in interface AccessibleContext
Returns:
the accessible parent

getAccessibleRole

public AccessibleRole getAccessibleRole()

Returns the role of this component.
Overrides:
getAccessibleRole in interface AccessibleContext
Returns:
the accessible role

getAccessibleStateSet

public AccessibleStateSet getAccessibleStateSet()

Returns a state set describing this component's state.
Overrides:
getAccessibleStateSet in interface AccessibleContext
Returns:
a new state set
See Also:
AccessibleState

getBackground

public Color getBackground()

Gets the background color.
Specified by:
getBackground in interface AccessibleComponent
Returns:
the background color
See Also:
setBackground(Color)

getBounds

public Rectangle getBounds()

Gets the bounds of this component, or null if it is not on screen.
Specified by:
getBounds in interface AccessibleComponent
Returns:
the bounds
See Also:
contains(Point), setBounds(Rectangle)

getCursor

public Cursor getCursor()

Gets the cursor.
Specified by:
getCursor in interface AccessibleComponent
Returns:
the cursor
See Also:
setCursor(Cursor)

getFont

public Font getFont()

Gets the font.
Specified by:
getFont in interface AccessibleComponent
Returns:
the font
See Also:
setFont(Font)

getFontMetrics

public FontMetrics getFontMetrics(Font f)

Gets the font metrics for a font.
Specified by:
getFontMetrics in interface AccessibleComponent
Parameters:
f - the font to look up
Returns:
its metrics
Throws:
NullPointerException - if f is null
See Also:
getFont()

getForeground

public Color getForeground()

Gets the foreground color.
Specified by:
getForeground in interface AccessibleComponent
Returns:
the foreground color
See Also:
setForeground(Color)

getLocale

public Locale getLocale()

Returns the locale of this component.
Overrides:
getLocale in interface AccessibleContext
Returns:
the locale
Throws:
IllegalComponentStateException - if the locale is unknown

getLocation

public Point getLocation()

Returns the location of this object relative to its parent's coordinate system, or null if it is not showing.
Specified by:
getLocation in interface AccessibleComponent
Returns:
the location
See Also:
getBounds(), getLocationOnScreen()

getLocationOnScreen

public Point getLocationOnScreen()

Returns the location of this object on the screen, or null if it is not showing.
Specified by:
getLocationOnScreen in interface AccessibleComponent
Returns:
the location relative to screen coordinates, if showing
See Also:
getBounds(), getLocation()

getSize

public Dimension getSize()

Gets the size of this component, or null if it is not showing.
Specified by:
getSize in interface AccessibleComponent
Returns:
the size
See Also:
setSize(Dimension)

isEnabled

public boolean isEnabled()

Tests if the component is enabled.
Specified by:
isEnabled in interface AccessibleComponent
Returns:
true if the component is enabled
See Also:
setEnabled(boolean), getAccessibleStateSet(), AccessibleState.ENABLED

isFocusTraversable

public boolean isFocusTraversable()

Tests whether this component can accept focus.
Specified by:
isFocusTraversable in interface AccessibleComponent
Returns:
true if this is focus traversable
See Also:
(), AccessibleState.FOCUSABLE, AccessibleState.FOCUSED

isShowing

public boolean isShowing()

Tests if the component is showing.
Specified by:
isShowing in interface AccessibleComponent
Returns:
true if this is showing

isVisible

public boolean isVisible()

Test whether the component is visible (not necesarily showing).
Specified by:
isVisible in interface AccessibleComponent
Returns:
true if it is visible
See Also:
setVisible(boolean), getAccessibleStateSet(), AccessibleState.VISIBLE

removeFocusListener

public void removeFocusListener(FocusListener l)

Removes a focus listener.
Specified by:
removeFocusListener in interface AccessibleComponent
Parameters:
l - the listener to remove

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener l)

Removes a global property change listener from this accessible component.
Overrides:
removePropertyChangeListener in interface AccessibleContext
Parameters:
l - the listener to remove

requestFocus

public void requestFocus()

Requests focus for this component.
Specified by:
requestFocus in interface AccessibleComponent
See Also:
()

setBackground

public void setBackground(Color c)

Sets the background color.
Specified by:
setBackground in interface AccessibleComponent
Parameters:
c - the background color
See Also:
getBackground(), isOpaque()

setBounds

public void setBounds(Rectangle r)

Sets the bounds of this component.
Specified by:
setBounds in interface AccessibleComponent
Parameters:
r - the bounds
Throws:
NullPointerException - if r is null
See Also:
getBounds()

setCursor

public void setCursor(Cursor cursor)

Sets the cursor.
Specified by:
setCursor in interface AccessibleComponent
Parameters:
cursor - the cursor
See Also:
getCursor()

setEnabled

public void setEnabled(boolean b)

Set whether the component is enabled.
Specified by:
setEnabled in interface AccessibleComponent
Parameters:
b - the new enabled status
See Also:
isEnabled()

setFont

public void setFont(Font f)

Sets the font.
Specified by:
setFont in interface AccessibleComponent
Parameters:
f - the font
See Also:
getFont()

setForeground

public void setForeground(Color c)

Sets the foreground color.
Specified by:
setForeground in interface AccessibleComponent
Parameters:
c - the foreground color
See Also:
getForeground()

setLocation

public void setLocation(Point p)

Sets the location of this relative to its parent's coordinate system.
Specified by:
setLocation in interface AccessibleComponent
Parameters:
p - the location
Throws:
NullPointerException - if p is null
See Also:
getLocation()

setSize

public void setSize(Dimension d)

Sets the size of this component.
Specified by:
setSize in interface AccessibleComponent
Parameters:
d - the size
Throws:
NullPointerException - if d is null
See Also:
getSize()

setVisible

public void setVisible(boolean b)

Sets the visibility of this component.
Specified by:
setVisible in interface AccessibleComponent
Parameters:
b - the desired visibility
See Also:
isVisible()

Component.java -- a graphics component Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2006 Free Software Foundation This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.

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