/*
* Beryl - A web platform based on XML, XSLT and Java
* This file is part of the Beryl XML GUI
*
* Copyright (C) 2004 Wenzel Jakob <wazlaf@tigris.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-3107 USA
*/
package org.beryl.gui.widgets;
import java.awt.Component;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyEvent;
import javax.swing.JMenuItem;
import javax.swing.KeyStroke;
import org.beryl.gui.GUIEvent;
import org.beryl.gui.GUIEventListener;
import org.beryl.gui.GUIException;
import org.beryl.gui.ImageIconFactory;
import org.beryl.gui.Widget;
import org.beryl.gui.WidgetInfo;
public class MenuItem extends Widget {
protected static WidgetInfo menuItemInfo = null;
private JMenuItem menuItem = null;
static {
menuItemInfo = new WidgetInfo(MenuItem.class, widgetInfo);
menuItemInfo.addProperty("accelerator", "string", "");
menuItemInfo.addProperty("mnemonic", "string", "");
menuItemInfo.addProperty("text", "istring", "");
menuItemInfo.addEvent("selected");
menuItemInfo.setSupportsAnchor(false);
try {
menuItemInfo.addProperty("icon", "icon", ImageIconFactory.getIcon("broken"));
} catch (Exception e) {
throw new RuntimeException(e);
}
};
public MenuItem(Widget parent, String name) throws GUIException {
super(parent, name);
menuItem = new JMenuItem();
}
public void addListener(String event, final String name, final GUIEventListener listener) throws GUIException {
if ("selected".equals(event)) {
menuItem.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
listener.eventOccured(new GUIEvent(MenuItem.this, name, e));
}
});
} else {
super.addListener(event, name, listener);
}
}
/**
* Construct a keystroke from a string
*/
private KeyStroke parseKeyStroke(String keyStroke) throws GUIException {
if (keyStroke == null)
return null;
int modifiers = 0;
int index = keyStroke.indexOf('+');
if (index != -1) {
for (int i = 0; i < index; i++) {
switch (Character.toUpperCase(keyStroke.charAt(i))) {
case 'A' :
modifiers |= InputEvent.ALT_MASK;
break;
case 'C' :
modifiers |= InputEvent.CTRL_MASK;
break;
case 'M' :
modifiers |= InputEvent.META_MASK;
break;
case 'S' :
modifiers |= InputEvent.SHIFT_MASK;
break;
}
}
}
String key = keyStroke.substring(index + 1);
if (key.length() == 1) {
char ch = Character.toUpperCase(key.charAt(0));
if (modifiers == 0)
return KeyStroke.getKeyStroke(ch);
else
return KeyStroke.getKeyStroke(ch, modifiers);
} else if (key.length() == 0) {
throw new GUIException("Invalid key stroke: " + keyStroke);
} else {
try {
int ch = KeyEvent.class.getField("VK_".concat(key)).getInt(null);
return KeyStroke.getKeyStroke(ch, modifiers);
} catch (Exception e) {
throw new GUIException("Invalid key stroke: " + keyStroke);
}
}
}
public void setProperty(String name, Object value) throws GUIException {
if ("accelerator".equals(name)) {
if (value != null && !value.equals("")) {
KeyStroke stroke = parseKeyStroke((String) value);
menuItem.setAccelerator(stroke);
}
} else if (name.equals("mnemonic")) {
if (((String) value).length() > 0)
menuItem.setMnemonic(((String) value).charAt(0));
else
menuItem.setMnemonic('\0');
} else {
super.setProperty(name, value);
}
}
public Component getWidget() {
return menuItem;
}
public WidgetInfo getWidgetInfo() {
return menuItemInfo;
}
}