/[classpath]/classpath/java/awt/Checkbox.java
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revision 1.10.2.2 by gnu_andrew, Sun Jan 16 15:15:11 2005 UTC revision 1.10.2.3 by gnu_andrew, Fri Jan 21 02:16:35 2005 UTC
# Line 48  import javax.accessibility.AccessibleAct Line 48  import javax.accessibility.AccessibleAct
48  import javax.accessibility.AccessibleContext;  import javax.accessibility.AccessibleContext;
49  import javax.accessibility.AccessibleRole;  import javax.accessibility.AccessibleRole;
50  import javax.accessibility.AccessibleState;  import javax.accessibility.AccessibleState;
51    import javax.accessibility.AccessibleStateSet;
52  import javax.accessibility.AccessibleValue;  import javax.accessibility.AccessibleValue;
53    
54  /**  /**
# Line 55  import javax.accessibility.AccessibleVal Line 56  import javax.accessibility.AccessibleVal
56   * or more Checkboxes can be grouped by a CheckboxGroup.   * or more Checkboxes can be grouped by a CheckboxGroup.
57   *   *
58   * @author Aaron M. Renn (arenn@urbanophile.com)   * @author Aaron M. Renn (arenn@urbanophile.com)
59   * @author Tom Tromey <tromey@redhat.com>   * @author Tom Tromey (tromey@redhat.com)
60   */   */
61  public class Checkbox extends Component  public class Checkbox extends Component
62    implements ItemSelectable, Accessible, Serializable    implements ItemSelectable, Accessible, Serializable
# Line 94  private boolean state; Line 95  private boolean state;
95  // The list of listeners for this object.  // The list of listeners for this object.
96  private transient ItemListener item_listeners;  private transient ItemListener item_listeners;
97    
98  protected class AccessibleAWTCheckBox  /**
99     * This class provides accessibility support for the
100     * checkbox.
101     *
102     * @author Jerry Quinn  (jlquinn@optonline.net)
103     * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
104     */
105    protected class AccessibleAWTCheckbox
106    extends AccessibleAWTComponent    extends AccessibleAWTComponent
107    implements ItemListener, AccessibleAction, AccessibleValue    implements ItemListener, AccessibleAction, AccessibleValue
108  {  {
     
109    
110    /* (non-Javadoc)    /**
111       * Serialization constant to match JDK 1.5
112       */
113      private static final long serialVersionUID = 7881579233144754107L;
114    
115      /**
116       * Captures changes to the state of the checkbox and
117       * fires appropriate accessible property change events.
118       *
119       * @param event the event fired.
120     * @see java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)     * @see java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)
121     */     */
122    public void itemStateChanged(ItemEvent event)    public void itemStateChanged(ItemEvent event)
# Line 110  protected class AccessibleAWTCheckBox Line 126  protected class AccessibleAWTCheckBox
126                         state ? AccessibleState.CHECKED : null);                         state ? AccessibleState.CHECKED : null);
127    }    }
128        
129      /**
130       * Returns an implementation of the <code>AccessibleAction</code>
131       * interface for this accessible object.  In this case, the
132       * current instance is simply returned (with a more appropriate
133       * type), as it also implements the accessible action as well as
134       * the context.
135       *
136       * @return the accessible action associated with this context.
137       * @see javax.accessibility.AccessibleAction
138       */
139    public AccessibleAction getAccessibleAction()    public AccessibleAction getAccessibleAction()
140    {    {
141      return this;      return this;
142    }    }
143        
144      /**
145       * Returns an implementation of the <code>AccessibleValue</code>
146       * interface for this accessible object.  In this case, the
147       * current instance is simply returned (with a more appropriate
148       * type), as it also implements the accessible value as well as
149       * the context.
150       *
151       * @return the accessible value associated with this context.
152       * @see javax.accessibility.AccessibleValue
153       */
154    public AccessibleValue getAccessibleValue()    public AccessibleValue getAccessibleValue()
155    {    {
156      return this;      return this;
157    }    }
158        
159    /* (non-Javadoc)    /*
160       * The following methods are implemented in the JDK (up to
161       * 1.5) as stubs.  We do likewise here.
162       */
163    
164      /**
165       * Returns the number of actions associated with this accessible
166       * object.  This default implementation returns 0.
167       *
168       * @return the number of accessible actions available.
169     * @see javax.accessibility.AccessibleAction#getAccessibleActionCount()     * @see javax.accessibility.AccessibleAction#getAccessibleActionCount()
170     */     */
171    public int getAccessibleActionCount()    public int getAccessibleActionCount()
172    {    {
173      // 1.4.1 does this      // 1.4.1 and 1.5 do this
174      return 0;      return 0;
175    }    }
176    
177    /* (non-Javadoc)    /**
178       * Returns a description of the action with the supplied id.
179       * This default implementation always returns null.
180       *
181       * @param i the id of the action whose description should be
182       *          retrieved.
183       * @return a <code>String</code> describing the action.
184     * @see javax.accessibility.AccessibleAction#getAccessibleActionDescription(int)     * @see javax.accessibility.AccessibleAction#getAccessibleActionDescription(int)
185     */     */
186    public String getAccessibleActionDescription(int i)    public String getAccessibleActionDescription(int i)
187    {    {
188        // 1.5 does this
189      return null;      return null;
190    }    }
191    
192    /* (non-Javadoc)    /**
193       * Executes the action with the specified id.  This
194       * default implementation simply returns false.
195       *
196       * @param i the id of the action to perform.
197       * @return true if the action was performed.
198     * @see javax.accessibility.AccessibleAction#doAccessibleAction(int)     * @see javax.accessibility.AccessibleAction#doAccessibleAction(int)
199     */     */
200    public boolean doAccessibleAction(int i)    public boolean doAccessibleAction(int i)
201    {    {
202        // 1.5 does this
203      return false;      return false;
204    }    }
205    
206    /* (non-Javadoc)    /**
207       * Returns the current value of this accessible object.
208       * If no value has been set, null is returned.  This
209       * default implementation always returns null, regardless.
210       *
211       * @return the numeric value of this object, or null if
212       *         no value has been set.
213     * @see javax.accessibility.AccessibleValue#getCurrentAccessibleValue()     * @see javax.accessibility.AccessibleValue#getCurrentAccessibleValue()
214     */     */
215    public Number getCurrentAccessibleValue()    public Number getCurrentAccessibleValue()
216    {    {
217        // 1.5 does this
218      return null;      return null;
219    }    }
220    
221    /* (non-Javadoc)    /**
222       * Sets the current value of this accessible object
223       * to that supplied.  In this default implementation,
224       * the value is never set and the method always returns
225       * false.
226       *
227       * @param number the new accessible value.
228       * @return true if the value was set.
229     * @see javax.accessibility.AccessibleValue#setCurrentAccessibleValue(java.lang.Number)     * @see javax.accessibility.AccessibleValue#setCurrentAccessibleValue(java.lang.Number)
230     */     */
231    public boolean setCurrentAccessibleValue(Number number)    public boolean setCurrentAccessibleValue(Number number)
232    {    {
233        // 1.5 does this
234      return false;      return false;
235    }    }
236    
237    /* (non-Javadoc)    /**
238       * Returns the minimum acceptable accessible value used
239       * by this object, or null if no minimum value exists.
240       * This default implementation always returns null.
241       *
242       * @return the minimum acceptable accessible value, or null
243       *         if there is no minimum.
244     * @see javax.accessibility.AccessibleValue#getMinimumAccessibleValue()     * @see javax.accessibility.AccessibleValue#getMinimumAccessibleValue()
245     */     */
246    public Number getMinimumAccessibleValue()    public Number getMinimumAccessibleValue()
# Line 169  protected class AccessibleAWTCheckBox Line 248  protected class AccessibleAWTCheckBox
248      return null;      return null;
249    }    }
250    
251    /* (non-Javadoc)    /**
252       * Returns the maximum acceptable accessible value used
253       * by this object, or null if no maximum value exists.
254       * This default implementation always returns null.
255       *
256       * @return the maximum acceptable accessible value, or null
257       *         if there is no maximum.
258     * @see javax.accessibility.AccessibleValue#getMaximumAccessibleValue()     * @see javax.accessibility.AccessibleValue#getMaximumAccessibleValue()
259     */     */
260    public Number getMaximumAccessibleValue()    public Number getMaximumAccessibleValue()
# Line 177  protected class AccessibleAWTCheckBox Line 262  protected class AccessibleAWTCheckBox
262      return null;      return null;
263    }    }
264        
265      /**
266       * Returns the role of this accessible object.
267       *
268       * @return the instance of <code>AccessibleRole</code>,
269       *         which describes this object.
270       * @see javax.accessibility.AccessibleRole
271       */
272    public AccessibleRole getAccessibleRole()    public AccessibleRole getAccessibleRole()
273    {    {
274      return AccessibleRole.CHECK_BOX;      return AccessibleRole.CHECK_BOX;
275    }    }
276        
277      /**
278       * Returns the state set of this accessible object.
279       *
280       * @return a set of <code>AccessibleState</code>s
281       *         which represent the current state of the
282       *         accessible object.
283       * @see javax.accessibility.AccessibleState
284       * @see javax.accessibility.AccessibleStateSet
285       */
286      public AccessibleStateSet getAccessibleStateSet()
287      {
288        AccessibleStateSet set = super.getAccessibleStateSet();
289        if (state)
290          set.add(AccessibleState.CHECKED);
291        return set;
292      }
293    
294  }  }
295    
296  /*************************************************************************/  /*************************************************************************/
# Line 491  paramString() Line 600  paramString()
600  }  }
601    
602  /**  /**
603   * Gets the AccessibleContext associated with this <code>CheckBox</code>.   * Gets the AccessibleContext associated with this <code>Checkbox</code>.
604   * The context is created, if necessary.   * The context is created, if necessary.
605   *   *
606   * @return the associated context   * @return the associated context
# Line 501  public AccessibleContext getAccessibleCo Line 610  public AccessibleContext getAccessibleCo
610    /* Create the context if this is the first request */    /* Create the context if this is the first request */
611    if (accessibleContext == null)    if (accessibleContext == null)
612    {    {
613      AccessibleAWTCheckBox ac = new AccessibleAWTCheckBox();      AccessibleAWTCheckbox ac = new AccessibleAWTCheckbox();
614      accessibleContext = ac;      accessibleContext = ac;
615      addItemListener(ac);      addItemListener(ac);
616    }    }

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