/[classpath]/classpath/java/awt/Checkbox.java
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revision 1.12 by mkoch, Thu Dec 30 19:02:06 2004 UTC revision 1.13 by gnu_andrew, Thu Jan 20 02:39:26 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  protected class AccessibleAWTCheckbox
99    extends AccessibleAWTComponent    extends AccessibleAWTComponent
100    implements ItemListener, AccessibleAction, AccessibleValue    implements ItemListener, AccessibleAction, AccessibleValue
101  {  {
     
102    
103    /* (non-Javadoc)    /**
104       * Serialization constant to match JDK 1.5
105       */
106      private static final long serialVersionUID = 7881579233144754107L;
107    
108      /**
109       * Captures changes to the state of the checkbox and
110       * fires appropriate accessible property change events.
111       *
112       * @param event the event fired.
113     * @see java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)     * @see java.awt.event.ItemListener#itemStateChanged(java.awt.event.ItemEvent)
114     */     */
115    public void itemStateChanged(ItemEvent event)    public void itemStateChanged(ItemEvent event)
# Line 110  protected class AccessibleAWTCheckBox Line 119  protected class AccessibleAWTCheckBox
119                         state ? AccessibleState.CHECKED : null);                         state ? AccessibleState.CHECKED : null);
120    }    }
121        
122      /**
123       * Returns an implementation of the <code>AccessibleAction</code>
124       * interface for this accessible object.  In this case, the
125       * current instance is simply returned (with a more appropriate
126       * type), as it also implements the accessible action as well as
127       * the context.
128       *
129       * @return the accessible action associated with this context.
130       * @see javax.accessibility.AccessibleAction
131       */
132    public AccessibleAction getAccessibleAction()    public AccessibleAction getAccessibleAction()
133    {    {
134      return this;      return this;
135    }    }
136        
137      /**
138       * Returns an implementation of the <code>AccessibleValue</code>
139       * interface for this accessible object.  In this case, the
140       * current instance is simply returned (with a more appropriate
141       * type), as it also implements the accessible value as well as
142       * the context.
143       *
144       * @return the accessible value associated with this context.
145       * @see javax.accessibility.AccessibleValue
146       */
147    public AccessibleValue getAccessibleValue()    public AccessibleValue getAccessibleValue()
148    {    {
149      return this;      return this;
150    }    }
151        
152    /* (non-Javadoc)    /*
153       * The following methods are implemented in the JDK (up to
154       * 1.5) as stubs.  We do likewise here.
155       */
156    
157      /**
158       * Returns the number of actions associated with this accessible
159       * object.  This default implementation returns 0.
160       *
161       * @return the number of accessible actions available.
162     * @see javax.accessibility.AccessibleAction#getAccessibleActionCount()     * @see javax.accessibility.AccessibleAction#getAccessibleActionCount()
163     */     */
164    public int getAccessibleActionCount()    public int getAccessibleActionCount()
165    {    {
166      // 1.4.1 does this      // 1.4.1 and 1.5 do this
167      return 0;      return 0;
168    }    }
169    
170    /* (non-Javadoc)    /**
171       * Returns a description of the action with the supplied id.
172       * This default implementation always returns null.
173       *
174       * @param i the id of the action whose description should be
175       *          retrieved.
176       * @return a <code>String</code> describing the action.
177     * @see javax.accessibility.AccessibleAction#getAccessibleActionDescription(int)     * @see javax.accessibility.AccessibleAction#getAccessibleActionDescription(int)
178     */     */
179    public String getAccessibleActionDescription(int i)    public String getAccessibleActionDescription(int i)
180    {    {
181        // 1.5 does this
182      return null;      return null;
183    }    }
184    
185    /* (non-Javadoc)    /**
186       * Executes the action with the specified id.  This
187       * default implementation simply returns false.
188       *
189       * @param i the id of the action to perform.
190       * @return true if the action was performed.
191     * @see javax.accessibility.AccessibleAction#doAccessibleAction(int)     * @see javax.accessibility.AccessibleAction#doAccessibleAction(int)
192     */     */
193    public boolean doAccessibleAction(int i)    public boolean doAccessibleAction(int i)
194    {    {
195        // 1.5 does this
196      return false;      return false;
197    }    }
198    
199    /* (non-Javadoc)    /**
200       * Returns the current value of this accessible object.
201       * If no value has been set, null is returned.  This
202       * default implementation always returns null, regardless.
203       *
204       * @return the numeric value of this object, or null if
205       *         no value has been set.
206     * @see javax.accessibility.AccessibleValue#getCurrentAccessibleValue()     * @see javax.accessibility.AccessibleValue#getCurrentAccessibleValue()
207     */     */
208    public Number getCurrentAccessibleValue()    public Number getCurrentAccessibleValue()
209    {    {
210        // 1.5 does this
211      return null;      return null;
212    }    }
213    
214    /* (non-Javadoc)    /**
215       * Sets the current value of this accessible object
216       * to that supplied.  In this default implementation,
217       * the value is never set and the method always returns
218       * false.
219       *
220       * @param number the new accessible value.
221       * @return true if the value was set.
222     * @see javax.accessibility.AccessibleValue#setCurrentAccessibleValue(java.lang.Number)     * @see javax.accessibility.AccessibleValue#setCurrentAccessibleValue(java.lang.Number)
223     */     */
224    public boolean setCurrentAccessibleValue(Number number)    public boolean setCurrentAccessibleValue(Number number)
225    {    {
226        // 1.5 does this
227      return false;      return false;
228    }    }
229    
230    /* (non-Javadoc)    /**
231       * Returns the minimum acceptable accessible value used
232       * by this object, or null if no minimum value exists.
233       * This default implementation always returns null.
234       *
235       * @return the minimum acceptable accessible value, or null
236       *         if there is no minimum.
237     * @see javax.accessibility.AccessibleValue#getMinimumAccessibleValue()     * @see javax.accessibility.AccessibleValue#getMinimumAccessibleValue()
238     */     */
239    public Number getMinimumAccessibleValue()    public Number getMinimumAccessibleValue()
# Line 169  protected class AccessibleAWTCheckBox Line 241  protected class AccessibleAWTCheckBox
241      return null;      return null;
242    }    }
243    
244    /* (non-Javadoc)    /**
245       * Returns the maximum acceptable accessible value used
246       * by this object, or null if no maximum value exists.
247       * This default implementation always returns null.
248       *
249       * @return the maximum acceptable accessible value, or null
250       *         if there is no maximum.
251     * @see javax.accessibility.AccessibleValue#getMaximumAccessibleValue()     * @see javax.accessibility.AccessibleValue#getMaximumAccessibleValue()
252     */     */
253    public Number getMaximumAccessibleValue()    public Number getMaximumAccessibleValue()
# Line 177  protected class AccessibleAWTCheckBox Line 255  protected class AccessibleAWTCheckBox
255      return null;      return null;
256    }    }
257        
258      /**
259       * Returns the role of this accessible object.
260       *
261       * @return the instance of <code>AccessibleRole</code>,
262       *         which describes this object.
263       * @see javax.accessibility.AccessibleRole
264       */
265    public AccessibleRole getAccessibleRole()    public AccessibleRole getAccessibleRole()
266    {    {
267      return AccessibleRole.CHECK_BOX;      return AccessibleRole.CHECK_BOX;
268    }    }
269        
270      /**
271       * Returns the state set of this accessible object.
272       *
273       * @return a set of <code>AccessibleState</code>s
274       *         which represent the current state of the
275       *         accessible object.
276       * @see javax.accessibility.AccessibleState
277       * @see javax.accessibility.AccessibleStateSet
278       */
279      public AccessibleStateSet getAccessibleStateSet()
280      {
281        AccessibleStateSet set = super.getAccessibleStateSet();
282        if (state)
283          set.add(AccessibleState.CHECKED);
284        return set;
285      }
286    
287  }  }
288    
289  /*************************************************************************/  /*************************************************************************/
# Line 491  paramString() Line 593  paramString()
593  }  }
594    
595  /**  /**
596   * Gets the AccessibleContext associated with this <code>CheckBox</code>.   * Gets the AccessibleContext associated with this <code>Checkbox</code>.
597   * The context is created, if necessary.   * The context is created, if necessary.
598   *   *
599   * @return the associated context   * @return the associated context
# Line 501  public AccessibleContext getAccessibleCo Line 603  public AccessibleContext getAccessibleCo
603    /* Create the context if this is the first request */    /* Create the context if this is the first request */
604    if (accessibleContext == null)    if (accessibleContext == null)
605    {    {
606      AccessibleAWTCheckBox ac = new AccessibleAWTCheckBox();      AccessibleAWTCheckbox ac = new AccessibleAWTCheckbox();
607      accessibleContext = ac;      accessibleContext = ac;
608      addItemListener(ac);      addItemListener(ac);
609    }    }

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