- java.lang.Object
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- javax.accessibility.AccessibleContext
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- java.awt.Component.AccessibleAWTComponent
 
 
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- All Implemented Interfaces:
- Serializable,- AccessibleComponent
 - Direct Known 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
 - Enclosing class:
- Component
 
 protected abstract class Component.AccessibleAWTComponent extends AccessibleContext implements Serializable, AccessibleComponent Inner class of Component used to provide default support for accessibility. This class is not meant to be used directly by application developers, but is instead meant only to be subclassed by component developers.The class used to obtain the accessible role for this object. - Since:
- 1.3
- See Also:
- Serialized Form
 
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Nested Class SummaryNested Classes Modifier and Type Class Description protected classComponent.AccessibleAWTComponent.AccessibleAWTComponentHandlerFire PropertyChange listener, if one is registered, when shown/hidden..protected classComponent.AccessibleAWTComponent.AccessibleAWTFocusHandlerFire PropertyChange listener, if one is registered, when focus events happen
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Field SummaryFields Modifier and Type Field Description protected ComponentListeneraccessibleAWTComponentHandlerA component listener to track show/hide/resize events and convert them to PropertyChange events.protected FocusListeneraccessibleAWTFocusHandlerA listener to track focus events and convert them to PropertyChange events.- 
Fields declared in class javax.accessibility.AccessibleContextACCESSIBLE_ACTION_PROPERTY, ACCESSIBLE_ACTIVE_DESCENDANT_PROPERTY, ACCESSIBLE_CARET_PROPERTY, ACCESSIBLE_CHILD_PROPERTY, ACCESSIBLE_COMPONENT_BOUNDS_CHANGED, ACCESSIBLE_DESCRIPTION_PROPERTY, ACCESSIBLE_HYPERTEXT_OFFSET, ACCESSIBLE_INVALIDATE_CHILDREN, ACCESSIBLE_NAME_PROPERTY, ACCESSIBLE_SELECTION_PROPERTY, ACCESSIBLE_STATE_PROPERTY, ACCESSIBLE_TABLE_CAPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_COLUMN_HEADER_CHANGED, ACCESSIBLE_TABLE_MODEL_CHANGED, ACCESSIBLE_TABLE_ROW_DESCRIPTION_CHANGED, ACCESSIBLE_TABLE_ROW_HEADER_CHANGED, ACCESSIBLE_TABLE_SUMMARY_CHANGED, ACCESSIBLE_TEXT_ATTRIBUTES_CHANGED, ACCESSIBLE_TEXT_PROPERTY, ACCESSIBLE_VALUE_PROPERTY, ACCESSIBLE_VISIBLE_DATA_PROPERTY, accessibleDescription, accessibleName, accessibleParent
 
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Constructor SummaryConstructors Modifier Constructor Description protectedAccessibleAWTComponent()Though the class is abstract, this should be called by all sub-classes.
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Method SummaryAll Methods Instance Methods Concrete Methods Modifier and Type Method Description voidaddFocusListener(FocusListener l)Adds the specified focus listener to receive focus events from this component.voidaddPropertyChangeListener(PropertyChangeListener listener)Adds aPropertyChangeListenerto the listener list.booleancontains(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.AccessiblegetAccessibleAt(Point p)Returns theAccessiblechild, if one exists, contained at the local coordinatePoint.AccessiblegetAccessibleChild(int i)Returns the nthAccessiblechild of the object.intgetAccessibleChildrenCount()Returns the number of accessible children in the object.AccessibleComponentgetAccessibleComponent()Gets theAccessibleComponentassociated with this object if one exists.StringgetAccessibleDescription()Gets the accessible description of this object.intgetAccessibleIndexInParent()Gets the index of this object in its accessible parent.StringgetAccessibleName()Gets the accessible name of this object.AccessiblegetAccessibleParent()Gets theAccessibleparent of this object.AccessibleRolegetAccessibleRole()Gets the role of this object.AccessibleStateSetgetAccessibleStateSet()Gets the state of this object.ColorgetBackground()Gets the background color of this object.RectanglegetBounds()Gets the bounds of this object in the form of a Rectangle object.CursorgetCursor()Gets theCursorof this object.FontgetFont()Gets theFontof this object.FontMetricsgetFontMetrics(Font f)Gets theFontMetricsof this object.ColorgetForeground()Gets the foreground color of this object.LocalegetLocale()Returns the locale of this object.PointgetLocation()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.PointgetLocationOnScreen()Returns the location of the object on the screen.DimensiongetSize()Returns the size of this object in the form of aDimensionobject.booleanisEnabled()Determines if the object is enabled.booleanisFocusTraversable()Returns whether this object can accept focus or not.booleanisShowing()Determines if the object is showing.booleanisVisible()Determines if the object is visible.voidremoveFocusListener(FocusListener l)Removes the specified focus listener so it no longer receives focus events from this component.voidremovePropertyChangeListener(PropertyChangeListener listener)Remove a PropertyChangeListener from the listener list.voidrequestFocus()Requests focus for this object.voidsetBackground(Color c)Sets the background color of this object.voidsetBounds(Rectangle r)Sets the bounds of this object in the form of aRectangleobject.voidsetCursor(Cursor cursor)Sets theCursorof this object.voidsetEnabled(boolean b)Sets the enabled state of the object.voidsetFont(Font f)Sets theFontof this object.voidsetForeground(Color c)Sets the foreground color of this object.voidsetLocation(Point p)Sets the location of the object relative to the parent.voidsetSize(Dimension d)Resizes this object so that it has width and height.voidsetVisible(boolean b)Sets the visible state of the object.- 
Methods declared in class javax.accessibility.AccessibleContextfirePropertyChange, getAccessibleAction, getAccessibleEditableText, getAccessibleIcon, getAccessibleRelationSet, getAccessibleSelection, getAccessibleTable, getAccessibleText, getAccessibleValue, setAccessibleDescription, setAccessibleName, setAccessibleParent
 
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Field Detail- 
accessibleAWTComponentHandlerprotected ComponentListener accessibleAWTComponentHandler A component listener to track show/hide/resize events and convert them to PropertyChange events.
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accessibleAWTFocusHandlerprotected FocusListener accessibleAWTFocusHandler A listener to track focus events and convert them to PropertyChange events.
 
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Method Detail- 
addPropertyChangeListenerpublic void addPropertyChangeListener(PropertyChangeListener listener) Adds aPropertyChangeListenerto the listener list.- Overrides:
- addPropertyChangeListenerin class- AccessibleContext
- Parameters:
- listener- the property change listener to be added
- 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
 
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removePropertyChangeListenerpublic void removePropertyChangeListener(PropertyChangeListener listener) Remove a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.- Overrides:
- removePropertyChangeListenerin class- AccessibleContext
- Parameters:
- listener- The PropertyChangeListener to be removed
 
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getAccessibleNamepublic String getAccessibleName() Gets the accessible name of this object. This should almost never returnjava.awt.Component.getName(), as that generally isn't a localized name, and doesn't have meaning for the user. If the object is fundamentally a text object (e.g. a menu item), the accessible name should be the text of the object (e.g. "save"). If the object has a tooltip, the tooltip text may also be an appropriate String to return.- Overrides:
- getAccessibleNamein class- AccessibleContext
- Returns:
- the localized name of the object -- can be
         nullif this object does not have a name
- See Also:
- AccessibleContext.setAccessibleName(java.lang.String)
 
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getAccessibleDescriptionpublic String getAccessibleDescription() Gets the accessible description of this object. This should be a concise, localized description of what this object is - what is its meaning to the user. If the object has a tooltip, the tooltip text may be an appropriate string to return, assuming it contains a concise description of the object (instead of just the name of the object - e.g. a "Save" icon on a toolbar that had "save" as the tooltip text shouldn't return the tooltip text as the description, but something like "Saves the current text document" instead).- Overrides:
- getAccessibleDescriptionin class- AccessibleContext
- Returns:
- the localized description of the object -- can be
        nullif this object does not have a description
- See Also:
- AccessibleContext.setAccessibleDescription(java.lang.String)
 
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getAccessibleRolepublic AccessibleRole getAccessibleRole() Gets the role of this object.- Specified by:
- getAccessibleRolein class- AccessibleContext
- Returns:
- an instance of AccessibleRoledescribing the role of the object
- See Also:
- AccessibleRole
 
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getAccessibleStateSetpublic AccessibleStateSet getAccessibleStateSet() Gets the state of this object.- Specified by:
- getAccessibleStateSetin class- AccessibleContext
- Returns:
- an instance of AccessibleStateSetcontaining the current state set of the object
- See Also:
- AccessibleState
 
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getAccessibleParentpublic Accessible getAccessibleParent() Gets theAccessibleparent of this object. If the parent of this object implementsAccessible, this method should simply returngetParent.- Overrides:
- getAccessibleParentin class- AccessibleContext
- Returns:
- the Accessibleparent of this object -- can benullif this object does not have anAccessibleparent
 
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getAccessibleIndexInParentpublic int getAccessibleIndexInParent() Gets the index of this object in its accessible parent.- Specified by:
- getAccessibleIndexInParentin class- AccessibleContext
- Returns:
- the index of this object in its parent; or -1 if this object does not have an accessible parent
- See Also:
- getAccessibleParent()
 
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getAccessibleChildrenCountpublic int getAccessibleChildrenCount() Returns the number of accessible children in the object. If all of the children of this object implementAccessible, then this method should return the number of children of this object.- Specified by:
- getAccessibleChildrenCountin class- AccessibleContext
- Returns:
- the number of accessible children in the object
 
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getAccessibleChildpublic Accessible getAccessibleChild(int i) Returns the nthAccessiblechild of the object.- Specified by:
- getAccessibleChildin class- AccessibleContext
- Parameters:
- i- zero-based index of child
- Returns:
- the nth Accessiblechild of the object
- See Also:
- AccessibleContext.getAccessibleChildrenCount()
 
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getLocalepublic Locale getLocale() Returns the locale of this object.- Specified by:
- getLocalein class- AccessibleContext
- Returns:
- the locale of this object
 
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getAccessibleComponentpublic AccessibleComponent getAccessibleComponent() Gets theAccessibleComponentassociated with this object if one exists. Otherwise returnnull.- Overrides:
- getAccessibleComponentin class- AccessibleContext
- Returns:
- the component
- See Also:
- AccessibleComponent
 
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getBackgroundpublic Color getBackground() Gets the background color of this object.- Specified by:
- getBackgroundin interface- AccessibleComponent
- Returns:
- the background color, if supported, of the object;
      otherwise, null
- See Also:
- AccessibleComponent.setBackground(java.awt.Color)
 
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setBackgroundpublic void setBackground(Color c) Sets the background color of this object. (For transparency, seeisOpaque.)- Specified by:
- setBackgroundin interface- AccessibleComponent
- Parameters:
- c- the new- Colorfor the background
- See Also:
- Component.isOpaque()
 
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getForegroundpublic Color getForeground() Gets the foreground color of this object.- Specified by:
- getForegroundin interface- AccessibleComponent
- Returns:
- the foreground color, if supported, of the object;
     otherwise, null
- See Also:
- AccessibleComponent.setForeground(java.awt.Color)
 
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setForegroundpublic void setForeground(Color c) Sets the foreground color of this object.- Specified by:
- setForegroundin interface- AccessibleComponent
- Parameters:
- c- the new- Colorfor the foreground
- See Also:
- AccessibleComponent.getForeground()
 
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getCursorpublic Cursor getCursor() Gets theCursorof this object.- Specified by:
- getCursorin interface- AccessibleComponent
- Returns:
- the Cursor, if supported, of the object; otherwise,null
- See Also:
- AccessibleComponent.setCursor(java.awt.Cursor)
 
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setCursorpublic void setCursor(Cursor cursor) Sets theCursorof this object.The method may have no visual effect if the Java platform implementation and/or the native system do not support changing the mouse cursor shape. - Specified by:
- setCursorin interface- AccessibleComponent
- Parameters:
- cursor- the new- Cursorfor the object
- See Also:
- AccessibleComponent.getCursor()
 
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getFontpublic Font getFont() Gets theFontof this object.- Specified by:
- getFontin interface- AccessibleComponent
- Returns:
- the Font, if supported, for the object; otherwise,null
- See Also:
- AccessibleComponent.setFont(java.awt.Font)
 
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setFontpublic void setFont(Font f) Sets theFontof this object.- Specified by:
- setFontin interface- AccessibleComponent
- Parameters:
- f- the new- Fontfor the object
- See Also:
- AccessibleComponent.getFont()
 
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getFontMetricspublic FontMetrics getFontMetrics(Font f) Gets theFontMetricsof this object.- Specified by:
- getFontMetricsin interface- AccessibleComponent
- Parameters:
- f- the- Font
- Returns:
- the FontMetrics, if supported, the object; otherwise,null
- See Also:
- getFont()
 
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isEnabledpublic boolean isEnabled() Determines if the object is enabled.- Specified by:
- isEnabledin interface- AccessibleComponent
- Returns:
- true if object is enabled; otherwise, false
- See Also:
- AccessibleComponent.setEnabled(boolean),- AccessibleContext.getAccessibleStateSet(),- AccessibleState.ENABLED,- AccessibleStateSet
 
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setEnabledpublic void setEnabled(boolean b) Sets the enabled state of the object.- Specified by:
- setEnabledin interface- AccessibleComponent
- Parameters:
- b- if true, enables this object; otherwise, disables it
- See Also:
- AccessibleComponent.isEnabled()
 
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isVisiblepublic boolean isVisible() Determines if the object is visible. Note: this means that the object intends to be visible; however, it may not in fact be showing on the screen because one of the objects that this object is contained by is not visible. To determine if an object is showing on the screen, useisShowing.- Specified by:
- isVisiblein interface- AccessibleComponent
- Returns:
- true if object is visible; otherwise, false
- See Also:
- AccessibleComponent.setVisible(boolean),- AccessibleContext.getAccessibleStateSet(),- AccessibleState.VISIBLE,- AccessibleStateSet
 
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setVisiblepublic void setVisible(boolean b) Sets the visible state of the object.- Specified by:
- setVisiblein interface- AccessibleComponent
- Parameters:
- b- if true, shows this object; otherwise, hides it
- See Also:
- AccessibleComponent.isVisible()
 
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isShowingpublic boolean isShowing() Determines if the object is showing. This is determined by checking the visibility of the object and ancestors of the object. Note: this will return true even if the object is obscured by another (for example, it happens to be underneath a menu that was pulled down).- Specified by:
- isShowingin interface- AccessibleComponent
- Returns:
- true if object is showing; otherwise, false
 
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containspublic boolean contains(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.- Specified by:
- containsin interface- AccessibleComponent
- Parameters:
- p- the- Pointrelative to the coordinate system of the object
- Returns:
- true if object contains Point; otherwise false
- See Also:
- AccessibleComponent.getBounds()
 
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getLocationOnScreenpublic Point getLocationOnScreen() Returns the location of the object on the screen.- Specified by:
- getLocationOnScreenin interface- AccessibleComponent
- Returns:
- location of object on screen -- can be
    nullif this object is not on the screen
- See Also:
- AccessibleComponent.getBounds(),- AccessibleComponent.getLocation()
 
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getLocationpublic 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.- Specified by:
- getLocationin interface- AccessibleComponent
- Returns:
- an instance of Point representing the top-left corner of
 the object's bounds in the coordinate space of the screen;
 nullif this object or its parent are not on the screen
- See Also:
- AccessibleComponent.getBounds(),- AccessibleComponent.getLocationOnScreen()
 
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setLocationpublic void setLocation(Point p) Sets the location of the object relative to the parent.- Specified by:
- setLocationin interface- AccessibleComponent
- Parameters:
- p- the coordinates of the object
- See Also:
- AccessibleComponent.getLocation()
 
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getBoundspublic 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.- Specified by:
- getBoundsin interface- AccessibleComponent
- Returns:
- a rectangle indicating this component's bounds;
   nullif this object is not on the screen
- See Also:
- AccessibleComponent.contains(java.awt.Point)
 
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setBoundspublic void setBounds(Rectangle r) Sets the bounds of this object in the form of aRectangleobject. The bounds specify this object's width, height, and location relative to its parent.- Specified by:
- setBoundsin interface- AccessibleComponent
- Parameters:
- r- a rectangle indicating this component's bounds
- See Also:
- AccessibleComponent.getBounds()
 
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getSizepublic Dimension getSize() Returns the size of this object in the form of aDimensionobject. The height field of theDimensionobject contains this object's height, and the width field of theDimensionobject contains this object's width.- Specified by:
- getSizein interface- AccessibleComponent
- Returns:
- a Dimensionobject that indicates the size of this component;nullif this object is not on the screen
- See Also:
- AccessibleComponent.setSize(java.awt.Dimension)
 
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setSizepublic void setSize(Dimension d) Resizes this object so that it has width and height.- Specified by:
- setSizein interface- AccessibleComponent
- Parameters:
- d- the dimension specifying the new size of the object
- See Also:
- AccessibleComponent.getSize()
 
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getAccessibleAtpublic Accessible getAccessibleAt(Point p) Returns theAccessiblechild, if one exists, contained at the local coordinatePoint. Otherwise returnsnull.- Specified by:
- getAccessibleAtin interface- AccessibleComponent
- Parameters:
- p- the point defining the top-left corner of the- Accessible, given in the coordinate space of the object's parent
- Returns:
- the Accessible, if it exists, at the specified location; elsenull
 
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isFocusTraversablepublic boolean isFocusTraversable() Returns whether this object can accept focus or not.- Specified by:
- isFocusTraversablein interface- AccessibleComponent
- Returns:
- true if object can accept focus; otherwise false
- See Also:
- AccessibleContext.getAccessibleStateSet(),- AccessibleState.FOCUSABLE,- AccessibleState.FOCUSED,- AccessibleStateSet
 
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requestFocuspublic void requestFocus() Requests focus for this object.- Specified by:
- requestFocusin interface- AccessibleComponent
- See Also:
- AccessibleComponent.isFocusTraversable()
 
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addFocusListenerpublic void addFocusListener(FocusListener l) Adds the specified focus listener to receive focus events from this component.- Specified by:
- addFocusListenerin interface- AccessibleComponent
- Parameters:
- l- the focus listener
- See Also:
- AccessibleComponent.removeFocusListener(java.awt.event.FocusListener)
 
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removeFocusListenerpublic void removeFocusListener(FocusListener l) Removes the specified focus listener so it no longer receives focus events from this component.- Specified by:
- removeFocusListenerin interface- AccessibleComponent
- Parameters:
- l- the focus listener
- See Also:
- AccessibleComponent.addFocusListener(java.awt.event.FocusListener)
 
 
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