/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2010 Sun Microsystems, Inc.
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*/
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package org.opends.guitools.controlpanel.event;
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import java.awt.Component;
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import java.awt.Container;
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import java.awt.event.KeyEvent;
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import javax.swing.ComboBoxModel;
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import javax.swing.JComboBox;
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import javax.swing.JLabel;
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import javax.swing.JList;
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import javax.swing.JComboBox.KeySelectionManager;
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import javax.swing.text.JTextComponent;
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/**
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* A class used to allow the user to type a sequence of characters that will
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* select automatically an item in the combo box.
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* Note that there must be one instance of this class per combo box. Two
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* combo boxes must not share the same ComboKeySelectionManager object and
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* two ComboKeySelectionManager must not be used by the same combo box.
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*/
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public class ComboKeySelectionManager implements KeySelectionManager
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{
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private JComboBox combo;
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private JList list;
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// The String that we are searching.
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private String lastSearchedString;
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private long lastSearchedTime;
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// The number of milliseconds we wait between types before considering that
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// the search starts again.
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private long RESET_BETWEEN_TYPES = 700;
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/**
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* Default constructor.
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* @param combo the combo box that is attached to this selection key manager.
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*/
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public ComboKeySelectionManager(JComboBox combo)
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{
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this.combo = combo;
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list = new JList();
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}
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/**
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* {@inheritDoc}
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*/
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public int selectionForKey(char key, ComboBoxModel model)
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{
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int selectedIndex = -1;
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long currentTime = System.currentTimeMillis();
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if (key == KeyEvent.VK_BACK_SPACE)
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{
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if (lastSearchedString == null)
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{
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lastSearchedString = "";
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}
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else if (lastSearchedString.length() > 0)
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{
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lastSearchedString = lastSearchedString.substring(0,
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lastSearchedString.length() -1);
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}
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else
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{
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// Nothing to do.
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}
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}
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else
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{
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if (lastSearchedTime + RESET_BETWEEN_TYPES < currentTime)
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{
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// Reset the search.
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lastSearchedString = String.valueOf(key);
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}
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else
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{
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if (lastSearchedString == null)
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{
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lastSearchedString = String.valueOf(key);
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}
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else
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{
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lastSearchedString += key;
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}
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}
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}
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lastSearchedTime = currentTime;
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if (lastSearchedString.length() > 0)
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{
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for (int i = 0; i < model.getSize() && selectedIndex == -1; i++)
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{
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Object value = model.getElementAt(i);
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Component comp = combo.getRenderer().getListCellRendererComponent(list,
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value, i, true, true);
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String sValue;
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if (comp instanceof Container)
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{
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sValue = getDisplayedStringValue((Container)comp);
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if (sValue == null)
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{
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sValue = "";
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}
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else
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{
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sValue = sValue.trim();
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}
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}
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else
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{
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sValue = String.valueOf(value);
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}
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if (sValue.toLowerCase().startsWith(lastSearchedString.toLowerCase()))
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{
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selectedIndex = i;
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}
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}
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}
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return selectedIndex;
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}
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private String getDisplayedStringValue(Container c)
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{
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String sValue = null;
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if (c instanceof JLabel)
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{
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sValue = ((JLabel)c).getText();
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}
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else if (c instanceof JTextComponent)
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{
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sValue = ((JTextComponent)c).getText();
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}
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else
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{
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int nCount = c.getComponentCount();
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for (int i=0 ; i<nCount && sValue == null; i++)
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{
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Component child = c.getComponent(i);
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if (child instanceof Container)
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{
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sValue = getDisplayedStringValue((Container)child);
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}
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}
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}
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return sValue;
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}
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}
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