f911ba985a
From-SVN: r102074
322 lines
9.8 KiB
Java
322 lines
9.8 KiB
Java
/* AccessibleComponent.java -- aids in accessibly rendering Java components
|
|
Copyright (C) 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
|
|
|
|
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. */
|
|
|
|
package javax.accessibility;
|
|
|
|
import java.awt.Color;
|
|
import java.awt.Cursor;
|
|
import java.awt.Dimension;
|
|
import java.awt.Font;
|
|
import java.awt.FontMetrics;
|
|
import java.awt.Point;
|
|
import java.awt.Rectangle;
|
|
import java.awt.event.FocusListener;
|
|
|
|
/**
|
|
* Objects which are to be rendered to a screen as part of a graphical
|
|
* user interface should implement this interface. Accessibility
|
|
* software can use the implementations of this interface to determine
|
|
* and set the screen representation for an object.
|
|
*
|
|
* <p>The <code>AccessibleContext.getAccessibleComponent()</code> method
|
|
* should return <code>null</code> if an object does not implement this
|
|
* interface.
|
|
*
|
|
* @author Eric Blake (ebb9@email.byu.edu)
|
|
* @see Accessible
|
|
* @see AccessibleContext
|
|
* @see AccessibleContext#getAccessibleComponent()
|
|
* @since 1.2
|
|
* @status updated to 1.4
|
|
*/
|
|
public interface AccessibleComponent
|
|
{
|
|
/**
|
|
* Get the background color of this component.
|
|
*
|
|
* @return the background color of this component, or null if not supported
|
|
* @see #setBackground(Color)
|
|
*/
|
|
Color getBackground();
|
|
|
|
/**
|
|
* Set the background color of this component to the specified color.
|
|
*
|
|
* @param color the color to set the background to
|
|
* @see #getBackground()
|
|
*/
|
|
void setBackground(Color color);
|
|
|
|
/**
|
|
* Get the foreground color of this component.
|
|
*
|
|
* @return the foreground color of this component, or null if not supported
|
|
* @see #setForeground(Color)
|
|
*/
|
|
Color getForeground();
|
|
|
|
/**
|
|
* Set the foreground color of this component.
|
|
*
|
|
* @param color the color to set the foreground to
|
|
* @see #getForeground()
|
|
*/
|
|
void setForeground(Color color);
|
|
|
|
/**
|
|
* Get the cursor of this component.
|
|
*
|
|
* @return the Cursor of this component, or null if not supported
|
|
* @see #setCursor(Cursor)
|
|
*/
|
|
Cursor getCursor();
|
|
|
|
/**
|
|
* Set the cursor of the component.
|
|
*
|
|
* @param cursor the graphical representation of the cursor to use
|
|
* @see #getCursor()
|
|
*/
|
|
void setCursor(Cursor cursor);
|
|
|
|
/**
|
|
* Get the font of this component
|
|
*
|
|
* @return the font of the component, or null if not supported
|
|
* @see #setFont(Font)
|
|
*/
|
|
Font getFont();
|
|
|
|
/**
|
|
* Set the font of this component.
|
|
*
|
|
* @param font the font to use
|
|
* @see #getFont()
|
|
*/
|
|
void setFont(Font font);
|
|
|
|
/**
|
|
* Get the <code>FontMetrics</code> of the specified font in this component.
|
|
*
|
|
* @param font the specified font
|
|
* @return the metrics for the specified font, or null if not supported
|
|
* @throws NullPointerException if font is null
|
|
* @see #getFont()
|
|
*/
|
|
FontMetrics getFontMetrics(Font font);
|
|
|
|
/**
|
|
* Indicates whether or not this component is enabled. An object which is
|
|
* enabled also has AccessibleState.ENABLED in its StateSet.
|
|
*
|
|
* @return true if the component is enabled
|
|
* @see #setEnabled(boolean)
|
|
* @see AccessibleContext#getAccessibleStateSet()
|
|
* @see AccessibleState#ENABLED
|
|
*/
|
|
boolean isEnabled();
|
|
|
|
/**
|
|
* Set this component to an enabled or disabled state.
|
|
*
|
|
* @param b true to enable the component, else disable it
|
|
* @see #isEnabled()
|
|
*/
|
|
void setEnabled(boolean b);
|
|
|
|
/**
|
|
* Indicates whether or not this component is visible or intends to be
|
|
* visible although one of its ancestors may not be. An object which is
|
|
* visible also has AccessibleState.VISIBLE in its StateSet. Check
|
|
* <code>isShowing()</code> to see if the object is on screen.
|
|
*
|
|
* @return true if the component is visible
|
|
* @see #setVisible(boolean)
|
|
* @see AccessibleContext#getAccessibleStateSet()
|
|
* @see AccessibleState#VISIBLE
|
|
*/
|
|
boolean isVisible();
|
|
|
|
/**
|
|
* Set the visible state of this component.
|
|
*
|
|
* @param b true to make the component visible, else hide it
|
|
* @see #isVisible()
|
|
*/
|
|
void setVisible(boolean b);
|
|
|
|
/**
|
|
* Indicates whether or not this component is visible by checking
|
|
* the visibility of this component and its ancestors. The component may
|
|
* be hidden on screen by another component like pop-up help. An object
|
|
* which is showing on screen also has AccessibleState.SHOWING in its
|
|
* StateSet.
|
|
*
|
|
* @return true if component and ancestors are visible
|
|
* @see #isVisible()
|
|
* @see #setVisible(boolean)
|
|
* @see AccessibleContext#getAccessibleStateSet()
|
|
* @see AccessibleState#SHOWING
|
|
*/
|
|
boolean isShowing();
|
|
|
|
/**
|
|
* Tests whether or not the specified point is contained within
|
|
* this component. The coordinates are specified relative to this
|
|
* component's coordinate system.
|
|
*
|
|
* @param point the Point to locate
|
|
* @return true if the point is within this component
|
|
* @throws NullPointerException if point is null
|
|
* @see #getBounds()
|
|
*/
|
|
boolean contains(Point point);
|
|
|
|
/**
|
|
* Get the location of this component in the screen's coordinate space.
|
|
* The point specified is the top-left corner of this component.
|
|
*
|
|
* @return the location on screen, or null if off-screen
|
|
* @see #getBounds()
|
|
* @see #getLocation()
|
|
*/
|
|
Point getLocationOnScreen();
|
|
|
|
/**
|
|
* Get the location of this component in the parent's coordinate system.
|
|
* The point specified is the top-left corner of this component.
|
|
*
|
|
* @return the location in the parent on screen, or null if off-screen
|
|
* @see #getBounds()
|
|
* @see #getLocationOnScreen()
|
|
* @see #setLocation(Point)
|
|
*/
|
|
Point getLocation();
|
|
|
|
/**
|
|
* Set the location of this component relative to its parent. The point
|
|
* specified represents the top-left corner of this component.
|
|
*
|
|
* @param point the top-left corner of this component relative to the parent
|
|
* @throws NullPointerException if point is null
|
|
* @see #getLocation()
|
|
*/
|
|
void setLocation(Point point);
|
|
|
|
/**
|
|
* Get the bounds of this component relative to its parent - it's width,
|
|
* height, and relative location to its parent.
|
|
*
|
|
* @return the bounds of this component, or null if not on screen
|
|
* @see #contains(Point)
|
|
*/
|
|
Rectangle getBounds();
|
|
|
|
/**
|
|
* Set the bounds of this component to the specified height and width, and
|
|
* relative location to its parent.
|
|
*
|
|
* @param rectangle the new height, width, and relative location
|
|
* @throws NullPointerException if rectangle is null
|
|
*/
|
|
void setBounds(Rectangle rectangle);
|
|
|
|
/**
|
|
* Get the size of this component - it's width and height.
|
|
*
|
|
* @return the dimensions of this component, or null if not on screen
|
|
* @see #setSize(Dimension)
|
|
*/
|
|
Dimension getSize();
|
|
|
|
/**
|
|
* Set the size of this component to the given dimensions.
|
|
*
|
|
* @param dimension the new size of the component
|
|
* @throws NullPointerException if dimension is null
|
|
* @see #getSize()
|
|
*/
|
|
void setSize(Dimension dimension);
|
|
|
|
/**
|
|
* If an object exists at the specified point which is a child of this
|
|
* parent component, and it is accessible, then it is returned.
|
|
*
|
|
* @param point the location within this component's coordinate system
|
|
* @return the accessible child object at that point, or null
|
|
*/
|
|
Accessible getAccessibleAt(Point point);
|
|
|
|
/**
|
|
* Indicates whether or not this component can accept focus. An object
|
|
* which can accept focus also has AccessibleState.FOCUSABLE in its
|
|
* StateSet.
|
|
*
|
|
* @return true if the component can accept focus
|
|
* @see AccessibleContext#getAccessibleStateSet()
|
|
* @see AccessibleState#FOCUSABLE
|
|
* @see AccessibleState#FOCUSED
|
|
*/
|
|
boolean isFocusTraversable();
|
|
|
|
/**
|
|
* If this method is called this component will attempt to gain focus,
|
|
* but if it cannot accept focus nothing happens. On success, the StateSet
|
|
* will contain AccessibleState.FOCUSED
|
|
*
|
|
* @see #isFocusTraversable()
|
|
* @see AccessibleState#FOCUSED
|
|
*/
|
|
void requestFocus();
|
|
|
|
/**
|
|
* Adds the specified listener to this component.
|
|
*
|
|
* @param listener the listener to add to this component
|
|
* @see #removeFocusListener(FocusListener)
|
|
*/
|
|
void addFocusListener(FocusListener listener);
|
|
|
|
/**
|
|
* Removes the specified listener from this component.
|
|
*
|
|
* @param listener the listener to remove
|
|
* @see #addFocusListener(FocusListener)
|
|
*/
|
|
void removeFocusListener(FocusListener listener);
|
|
} // interface AccessibleComponent
|