uimaj-2.3.0-incubating/uimaj-tools/src/main/java/org/apache/uima/tools/cvd/control/TextFocusHandler.java

/*
 * 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.apache.uima.tools.cvd.control;

import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;

import org.apache.uima.tools.cvd.MainFrame;

public class TextFocusHandler implements FocusListener {

  private final MainFrame main;

  public TextFocusHandler(MainFrame frame) {
    this.main = frame;
  }

  /*
   * (non-Javadoc)
   * 
   * @see java.awt.event.FocusListener#focusGained(java.awt.event.FocusEvent)
   */
  public void focusGained(FocusEvent e) {
    // Need to make the caret visible when gaining focus. Sometimes this happens automatically, but
    // not always. Not sure if there is a better way to do this.
    this.main.getTextArea().getCaret().setVisible(true);
  }

  /*
   * (non-Javadoc)
   * 
   * @see java.awt.event.FocusListener#focusLost(java.awt.event.FocusEvent)
   */
  public void focusLost(FocusEvent e) {
    // Does nothing
  }

}