com.sun.swingset3.demos.textfield.JHistoryTextField Maven / Gradle / Ivy
/*
* Copyright 2007-2008 Sun Microsystems, Inc. All Rights Reserved.
*
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* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
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*
* - 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.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR
* 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
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package com.sun.swingset3.demos.textfield;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.util.List;
import javax.swing.*;
import javax.swing.border.LineBorder;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
/**
* JHistoryTextField
*
* @author Pavel Porvatov
*/
public class JHistoryTextField extends JTextField {
private static final int MAX_VISIBLE_ROWS = 8;
private final List history = new ArrayList();
private final JPopupMenu popup = new JPopupMenu() {
public Dimension getPreferredSize() {
Dimension dimension = super.getPreferredSize();
dimension.width = JHistoryTextField.this.getWidth();
return dimension;
}
};
private final JList list = new JList(new DefaultListModel());
private String userText;
private boolean notificationDenied;
public JHistoryTextField() {
JScrollPane scrollPane = new JScrollPane(list,
ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
scrollPane.setHorizontalScrollBar(null);
scrollPane.setBorder(null);
list.setFocusable(false);
popup.add(scrollPane);
popup.setFocusable(false);
popup.setBorder(new LineBorder(Color.BLACK, 1));
getDocument().addDocumentListener(new DocumentListener() {
public void insertUpdate(DocumentEvent e) {
onTextChanged();
}
public void removeUpdate(DocumentEvent e) {
onTextChanged();
}
public void changedUpdate(DocumentEvent e) {
onTextChanged();
}
});
list.addMouseMotionListener(new MouseAdapter() {
public void mouseMoved(MouseEvent e) {
int index = list.locationToIndex(e.getPoint());
if (index >= 0 && list.getSelectedIndex() != index) {
list.setSelectedIndex(index);
}
}
});
list.addMouseListener(new MouseAdapter() {
public void mouseReleased(MouseEvent e) {
if (SwingUtilities.isLeftMouseButton(e)) {
setTextWithoutNotification((String) list.getSelectedValue());
popup.setVisible(false);
}
}
});
addFocusListener(new FocusAdapter() {
public void focusLost(FocusEvent e) {
popup.setVisible(false);
}
});
addKeyListener(new KeyAdapter() {
public void keyPressed(KeyEvent e) {
if (popup.isShowing()) {
switch (e.getKeyCode()) {
case KeyEvent.VK_UP: {
changeListSelectedIndex(-1);
break;
}
case KeyEvent.VK_PAGE_UP: {
changeListSelectedIndex(-list.getVisibleRowCount());
break;
}
case KeyEvent.VK_DOWN: {
changeListSelectedIndex(1);
break;
}
case KeyEvent.VK_PAGE_DOWN: {
changeListSelectedIndex(list.getVisibleRowCount());
break;
}
case KeyEvent.VK_ESCAPE: {
popup.setVisible(false);
setTextWithoutNotification(userText);
break;
}
case KeyEvent.VK_ENTER:
case KeyEvent.VK_LEFT:
case KeyEvent.VK_RIGHT: {
popup.setVisible(false);
break;
}
}
} else {
if (e.getKeyCode() == KeyEvent.VK_DOWN ||
e.getKeyCode() == KeyEvent.VK_UP ||
e.getKeyCode() == KeyEvent.VK_PAGE_UP ||
e.getKeyCode() == KeyEvent.VK_PAGE_DOWN) {
userText = getText();
showFilteredHistory();
}
}
}
});
}
private void changeListSelectedIndex(int delta) {
int size = list.getModel().getSize();
int index = list.getSelectedIndex();
int newIndex;
if (index < 0) {
newIndex = delta > 0 ? 0 : size - 1;
} else {
newIndex = index + delta;
}
if (newIndex >= size || newIndex < 0) {
newIndex = newIndex < 0 ? 0 : size - 1;
if (index == newIndex) {
newIndex = -1;
}
}
if (newIndex < 0) {
list.getSelectionModel().clearSelection();
list.ensureIndexIsVisible(0);
setTextWithoutNotification(userText);
} else {
list.setSelectedIndex(newIndex);
list.ensureIndexIsVisible(newIndex);
setTextWithoutNotification((String) list.getSelectedValue());
}
}
private void setTextWithoutNotification(String text) {
notificationDenied = true;
try {
setText(text);
} finally {
notificationDenied = false;
}
}
private void onTextChanged() {
if (!notificationDenied) {
userText = getText();
showFilteredHistory();
}
}
private void showFilteredHistory() {
list.getSelectionModel().clearSelection();
DefaultListModel model = (DefaultListModel) list.getModel();
model.clear();
for (String s : history) {
if (s.contains(userText)) {
model.addElement(s);
}
}
int size = model.size();
if (size == 0) {
popup.setVisible(false);
} else {
list.setVisibleRowCount(size < MAX_VISIBLE_ROWS ? size : MAX_VISIBLE_ROWS);
popup.pack();
if (!popup.isShowing()) {
popup.show(JHistoryTextField.this, 0, getHeight());
}
}
}
public List getHistory() {
return Collections.unmodifiableList(history);
}
public void setHistory(List history) {
this.history.clear();
this.history.addAll(history);
}
}