WidgetError.java

/*
 * Copyright 2010-2011 Research In Motion Limited.
 *
 * Licensed 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 blackberry.web.widget.impl;

import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.FieldChangeListener;
import net.rim.device.api.ui.component.ButtonField;
import net.rim.device.api.ui.component.Dialog;
import net.rim.device.api.ui.container.HorizontalFieldManager;

public class WidgetError extends Dialog implements Runnable, FieldChangeListener {

    private ButtonField _ok;

    /**
     * Constructor.
     */
    public WidgetError( Throwable t, String url ) {
        super( t.getMessage(), null, null, 0, null );
        initialize();
    }

    /* Override */
    public void run() {
        doModal();
        synchronized( this ) {
            notify();
        }
    }

    /**
     * Handles button select events for this dialog.
     * 
     * <p>
     * If the provided field is a {@link ButtonField}, this method invokes {@link #select()} to signal a button push.
     * 
     * @param field
     *            Field whose state changed.
     * @param context
     *            Information specifying the origin of the change.
     * */
    public void fieldChanged( Field field, int context ) {
        if( field != null && field == _ok) {
            select();
        }
    }

    private void initialize() {
        HorizontalFieldManager mgr = new HorizontalFieldManager( Field.FIELD_HCENTER );
        add( mgr );
        _ok = new ButtonField( "OK", Field.FIELD_HCENTER );
        _ok.setChangeListener( this );
        mgr.add( _ok );
        setEscapeEnabled( true );
    }
}