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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* 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 .
*/
package com.sun.star.wizards.ui.event;
import com.sun.star.awt.XControl;
import com.sun.star.lang.EventObject;
import com.sun.star.uno.UnoRuntime;
import com.sun.star.wizards.common.Helper;
import com.sun.star.wizards.common.PropertyNames;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
/**
* This class is a base class for listener classes.
* <p>It uses a hashtable to map between a ComponentName, EventName and a MethodInvokation Object.
* To use this class do the following:</p>
* <ul>
* <li>Write a subclass which implements the needed Listener(s).</li>
* <li>In the even methods, use invoke(...).</li>
* <li>When instantiating the component, register the subclass as the event listener.</li>
* <li>Write the methods which should be performed when the event occurs.</li>
* <li>call the "add" method, to define a component-event-action mapping.</li>
* </ul>
*/
public class AbstractListener
{
private HashMap<String,MethodInvocation> mHashtable = new HashMap<String,MethodInvocation>();
public void add(String componentName, String eventName, String methodName, Object target)
{
try
{
add(componentName, eventName, new MethodInvocation(methodName, target));
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
public void add(String componentName, String eventName, MethodInvocation mi)
{
mHashtable.put(componentName + eventName, mi);
}
public MethodInvocation get(String componentName, String eventName)
{
return mHashtable.get(componentName + eventName);
}
public Object invoke(String componentName, String eventName, Object param)
{
try
{
MethodInvocation mi = get(componentName, eventName);
if (mi != null)
{
return mi.invoke(param);
}
else
{
return null;
}
}
catch (InvocationTargetException ite)
{
System.out.println("=======================================================");
System.out.println("=== Note: An Exception was thrown which should have ===");
System.out.println("=== caused a crash. I caught it. Please report this ===");
System.out.println("=== to https://www.libreoffice.org/get-help/bug/ ===");
System.out.println("=======================================================");
ite.printStackTrace();
}
catch (IllegalAccessException iae)
{
iae.printStackTrace();
}
catch (Exception ex)
{
System.out.println("=======================================================");
System.out.println("=== Note: An Exception was thrown which should have ===");
System.out.println("=== caused a crash. I caught it. Please report this ===");
System.out.println("=== to https://www.libreoffice.org/get-help/bug/ ===");
System.out.println("=======================================================");
ex.printStackTrace();
}
return null;
}
/**
* Rerurns the property "name" of the Object which is the source of the event.
*/
public static String getEventSourceName(EventObject eventObject)
{
XControl xControl = UnoRuntime.queryInterface(XControl.class, eventObject.Source);
return (String) Helper.getUnoPropertyValue(xControl.getModel(), PropertyNames.PROPERTY_NAME, String.class);
}
}
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