/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999, 2000 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Ant" and "Apache Software
* Foundation" must not be used to endorse or promote products derived
* from this software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache"
* nor may "Apache" appear in their names without prior written
* permission of the Apache Group.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
* information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.tools.ant.gui.core;
import java.awt.event.ActionEvent;
import java.util.EventObject;
import org.apache.tools.ant.gui.command.Command;
import org.apache.tools.ant.gui.command.DisplayErrorCmd;
import org.apache.tools.ant.gui.command.NoOpCmd;
import org.apache.tools.ant.gui.event.AntEvent;
import org.apache.tools.ant.gui.event.BusFilter;
import org.apache.tools.ant.gui.event.BusMember;
import org.apache.tools.ant.gui.event.EventBus;
/**
* The purpose of this class is to watch for events that require some sort
* of action, like opening a file.
*
* @version $Revision: 1.3 $
* @author Simeon Fitch
*/
public class EventResponder {
/** The application context. */
private AppContext _context = null;
/**
* Standard constructor.
*
* @param context Application context.
*/
public EventResponder(AppContext context) {
_context = context;
// XXX This needs to be changed, along with the event bus,
// to allow the EventResponder to be the last listener
// to receive the event. This will allow the addition
// of event filters to yank an event out of the bus, sort of
// like an interrupt level.
_context.getEventBus().addMember(
EventBus.RESPONDING, new ActionResponder());
_context.getEventBus().addMember(
EventBus.RESPONDING, new AntResponder());
}
/** Handler for bus events. */
private class ActionResponder implements BusMember {
private final ActionFilter _filter = new ActionFilter();
/**
* Get the filter to that is used to determine if an event should
* to to the member.
*
* @return Filter to use.
*/
public BusFilter getBusFilter() {
return _filter;
}
/**
* Called when an event is to be posed to the member.
*
* @param event Event to post.
* @return true if event should be propogated, false if
* it should be cancelled.
*/
public boolean eventPosted(EventObject event) {
String command = ((ActionEvent)event).getActionCommand();
Command cmd =
_context.getActions().getActionCommand(command, _context, event);
if(cmd != null) {
cmd.run();
return false;
}
else {
// XXX log me.
System.err.println("Unhandled action: " + command);
// XXX temporary.
new DisplayErrorCmd(
_context,
"Sorry. \"" + command +
"\" not implemented yet. Care to help out?").run();
return true;
}
}
}
/** Filter for action events. */
private static class ActionFilter implements BusFilter {
public boolean accept(EventObject event) {
return event instanceof ActionEvent;
}
}
/** Handler for bus events. */
private class AntResponder implements BusMember {
private final AntFilter _filter = new AntFilter();
/**
* Get the filter to that is used to determine if an event should
* to to the member.
*
* @return Filter to use.
*/
public BusFilter getBusFilter() {
return _filter;
}
/**
* Called when an event is to be posed to the member.
*
* @param event Event to post.
* @return true if event should be propogated, false if
* it should be cancelled.
*/
public boolean eventPosted(EventObject event) {
AntEvent e = (AntEvent) event;
Command cmd = e.createDefaultCmd();
cmd.run();
return cmd instanceof NoOpCmd;
}
}
/** Filter for ant events. */
private static class AntFilter implements BusFilter {
public boolean accept(EventObject event) {
return event instanceof AntEvent;
}
}
}