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/*******************************************************************************
* Copyright (c) 2000, 2011 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.custom;
import org.eclipse.swt.internal.SWTEventListener;
/**
* The StyledText widget implements this listener to receive
* notifications when changes to the model occur.
* It is not intended to be implemented by clients or by
* implementors of StyledTextContent.
* Clients should listen to the ModifyEvent or ExtendedModifyEvent
* that is sent by the StyledText widget to receive text change
* notifications.
* Implementors of StyledTextContent should call the textChanging
* and textChanged methods when text changes occur as described
* below. If the entire text is replaced the textSet method
* should be called instead.
*/
public interface TextChangeListener extends SWTEventListener {
/**
* This method is called when the content is about to be changed.
* Callers also need to call the textChanged method after the
* content change has been applied. The widget only updates the
* screen properly when it receives both events.
*
* @param event the text changing event. All event fields need
* to be set by the sender.
* @see TextChangingEvent
*/
public void textChanging(TextChangingEvent event);
/**
* This method is called when the content has changed.
* Callers need to have called the textChanging method prior to
* applying the content change and calling this method. The widget
* only updates the screen properly when it receives both events.
*
* @param event the text changed event
*/
public void textChanged(TextChangedEvent event);
/**
* This method is called instead of the textChanging/textChanged
* combination when the entire old content has been replaced
* (e.g., by a call to StyledTextContent.setText()).
*
* @param event the text changed event
*/
public void textSet(TextChangedEvent event);
}
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