/**************************************************************
 * 
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



package org.openoffice.java.accessibility;

import com.sun.star.uno.*;
import com.sun.star.accessibility.*;

class Button extends AbstractButton implements javax.accessibility.Accessible {

    public Button(XAccessible xAccessible, XAccessibleContext xAccessibleContext) {
        super(xAccessible, xAccessibleContext);
    }

    protected XAccessibleEventListener createEventListener() {
        return new AccessibleButtonListener();
    }

    protected class AccessibleButtonListener
        extends AccessibleUNOComponentListener {
        protected AccessibleButtonListener() {
            super();
        }
    
        protected javax.accessibility.AccessibleContext getContext( Object any ) {
            try {
                XAccessible xAccessible = (XAccessible) 
                    AnyConverter.toObject( AccessibleObjectFactory.XAccessibleType, any );
            
                    javax.accessibility.Accessible accessible = 
                    (javax.accessibility.Accessible) Button.this.getComponent( xAccessible );
                    
                    return accessible.getAccessibleContext();
            } catch( com.sun.star.uno.Exception e ) {
                return null;
            }
        }
        
        /** Called by OpenOffice process to notify property changes */
        public void notifyEvent(AccessibleEventObject event) {
            switch (event.EventId) {
                case AccessibleEventId.CHILD:
                    java.awt.Component c = getComponent(unoAccessible);

                    Object values[] = { null, null };
                    
                    if (AnyConverter.isObject(event.OldValue)) {
                        values[0] = getContext( event.OldValue );
                    }

                    if (AnyConverter.isObject(event.NewValue)) {
                        values[1] = getContext( event.NewValue);
                    }

                    firePropertyChange(javax.accessibility.AccessibleContext.ACCESSIBLE_CHILD_PROPERTY,
                        values[0], values[1]);
                    break;

                default:
                    super.notifyEvent(event);
            }
        }
    }
    
    /** Creates the AccessibleContext associated with this object */
    public javax.accessibility.AccessibleContext createAccessibleContext() {
        return new AccessibleButton();
    }

    protected java.awt.Component getComponent(XAccessible unoAccessible) {
        java.awt.Component c = AccessibleObjectFactory.getAccessibleComponent(unoAccessible);

        if (c == null) {
            c = AccessibleObjectFactory.createAccessibleComponent(unoAccessible);

            if (c instanceof javax.accessibility.Accessible) {
                ((javax.accessibility.Accessible) c).getAccessibleContext()
                 .setAccessibleParent(this);
            }

            if( c instanceof java.awt.Container ) {
                AccessibleObjectFactory.populateContainer((java.awt.Container) c, unoAccessible.getAccessibleContext() );
            }
        }

        return c;
    }
    
    protected class AccessibleButton extends AccessibleAbstractButton {

        /** Gets the role of this object */
        public javax.accessibility.AccessibleRole getAccessibleRole() {
            return javax.accessibility.AccessibleRole.PUSH_BUTTON;
        }
        
        /** Returns the number of accessible children of the object */
        public int getAccessibleChildrenCount() {
            try {
                return unoAccessibleContext.getAccessibleChildCount();
            } catch (com.sun.star.uno.RuntimeException e) {
                return 0;
            }
        }

        /** Returns the specified Accessible child of the object */
        public synchronized javax.accessibility.Accessible getAccessibleChild( int i) {
            try {
                 return (javax.accessibility.Accessible) getComponent( unoAccessibleContext.getAccessibleChild(i) );
            } catch (com.sun.star.uno.RuntimeException e) {
            } catch (com.sun.star.lang.IndexOutOfBoundsException e) {
            }
            return null;
        }
        
        /*
        * AccessibleComponent
        */

        /** Returns the Accessible child, if one exists, contained at the local coordinate Point */
        public javax.accessibility.Accessible getAccessibleAt(java.awt.Point p) {
            try {
                java.awt.Component c = getComponent(unoAccessibleComponent.getAccessibleAtPoint(
                            new com.sun.star.awt.Point(p.x, p.y)));

                return (javax.accessibility.Accessible) c;
            } catch (com.sun.star.uno.RuntimeException e) {
                return null;
            }
        }
        
    }
}