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ca.spaz.gui.SpazMenuBar	0%	0%

1		package ca.spaz.gui;
2
3		import java.awt.Toolkit;
4		import java.awt.event.*;
5		import java.io.*;
6		import java.lang.reflect.Method;
7		import java.util.*;
8
9		import javax.swing.*;
10		import javax.xml.parsers.*;
11
12		import org.w3c.dom.*;
13
14
15		/**
16		* A JMenuBar that can be created from an XML description.
17		* Reflection is used to automatically dispatch the menu selections
18		* without need of registering listeners for each item.
19		*
20		*
21		* @author Aaron Davidson
22		* @date September 2002
23		*/
24
25		/* EXAMPLE:
26		<menubar>
27		<menu title="File">
28		<item title="Quit" key="q" action="doQuit"/>
29		</menu>
30		<menu title="Plot">
31		<item title="GC Density" key="g" action="doGCDensity"/>
32		<item title="AT Density" key="a" action="doATDensity"/>
33		</menu>
34		</menubar>
35		*/
36
37		public class SpazMenuBar extends JMenuBar implements ActionListener {
38		private Hashtable actions;
39		private Object listener;
40
41		public SpazMenuBar(InputStream file, Object listener) {
42	0	super();
43	0	this.listener = listener;
44	0	this.actions = new Hashtable();
45	0	loadXML(file);
46	0	}
47
48		public SpazMenuBar(String file, Object listener) {
49	0	super();
50	0	this.listener = listener;
51	0	this.actions = new Hashtable();
52
53	0	InputStream xmlFile = getClass().getResourceAsStream(file);
54	0	loadXML(xmlFile);
55	0	}
56
57
58		public void loadXML(InputStream file) {
59		try {
60	0	DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
61	0	dbf.setNamespaceAware(true);
62	0	DocumentBuilder db = dbf.newDocumentBuilder();
63		// File f = new File(fname);
64	0	Document d = db.parse(file);
65	0	loadXML(d);
66	0	} catch (Exception e) {
67	0	e.printStackTrace();
68	0	}
69	0	}
70
71		public void loadXML(Document d) {
72		try {
73	0	Element e = d.getDocumentElement();
74	0	NodeList nl = e.getElementsByTagName("menu");
75	0	for (int n=0; n<nl.getLength(); n++) {
76	0	Element elm = (Element)(nl.item(n));
77	0	loadXMLMenu(elm);
78		}
79	0	} catch (Exception e) {
80	0	e.printStackTrace();
81	0	}
82	0	}
83
84		public void loadXMLMenu(Element elm) {
85	0	String title = elm.getAttribute("title");
86	0	String key = elm.getAttribute("key");
87	0	JMenu menu = new JMenu(title);
88	0	this.add(menu);
89	0	NodeList nl = elm.getElementsByTagName("item");
90	0	for (int n=0; n<nl.getLength(); n++) {
91	0	Element e = (Element)(nl.item(n));
92	0	loadXMLMenuItem(e, menu);
93		}
94	0	if (key != null && key.length() > 0) {
95	0	menu.setMnemonic(key.charAt(0));
96		}
97	0	}
98
99		public void loadXMLMenuItem(Element elm, JMenu jm) {
100	0	String separator = elm.getAttribute("separator");
101	0	if (separator != null) {
102	0	if (separator.equals("true")) {
103	0	jm.addSeparator();
104	0	return;
105		}
106		}
107
108	0	String title = elm.getAttribute("title");
109	0	String tooltip = elm.getAttribute("tooltip");
110	0	String action = elm.getAttribute("action");
111	0	String key = elm.getAttribute("key");
112	0	String acc = elm.getAttribute("acc");
113	0	String checkbox = elm.getAttribute("checkbox");
114	0	JMenuItem item = new JMenuItem(title);
115	0	if (checkbox != null) {
116	0	if (checkbox.equals("true")) {
117	0	item = new JCheckBoxMenuItem(title);
118		}
119		}
120	0	jm.add(item);
121	0	item.addActionListener(this);
122	0	actions.put(item, action);
123	0	if (key != null && key.length() > 0) {
124	0	item.setMnemonic(key.charAt(0));
125		}
126	0	if (acc != null && acc.length() > 0) {
127		try {
128	0	Class c = KeyEvent.class;
129	0	item.setAccelerator(
130		KeyStroke.getKeyStroke(c.getDeclaredField(acc).getInt(c),
131		Toolkit.getDefaultToolkit().getMenuShortcutKeyMask()));
132	0	} catch (Exception e) {
133	0	e.printStackTrace();
134	0	}
135		}
136	0	if (tooltip != null) {
137	0	item.setToolTipText(tooltip);
138		}
139	0	}
140
141		public void setEnabled(String action, boolean on) {
142	0	JMenuItem item = (JMenuItem)getItem(action);
143	0	if (item != null) {
144	0	item.setEnabled(on);
145		}
146	0	}
147
148		public JMenuItem getItem(String action) {
149	0	Enumeration e = actions.keys();
150	0	while (e.hasMoreElements()) {
151	0	JMenuItem item = (JMenuItem)e.nextElement();
152	0	String s = (String)actions.get(item);
153	0	if (s.equals(action)) {
154	0	return item;
155		}
156	0	}
157	0	return null;
158		}
159
160
161		public boolean isSelected(String name) {
162	0	JCheckBoxMenuItem item = (JCheckBoxMenuItem)getItem(name);
163	0	return item.isSelected();
164		}
165
166		public void actionPerformed(ActionEvent e) {
167	0	String methodName = (String)actions.get(e.getSource());
168	0	if (methodName != null) {
169		try {
170	0	Class[] params = null;
171	0	Method m = listener.getClass().getMethod(methodName, params);
172	0	Object[] params2 = null;
173	0	m.invoke(listener, params2);
174	0	} catch (NoSuchMethodException me) {
175	0	JOptionPane.showMessageDialog(null, "No Menu Handler for '"+methodName+"'");
176		/* } catch (SecurityException se) {
177		} catch (IllegalAccessException ae) {
178		} catch (InvocationTargetException ie) {*/
179	0	} catch (Exception ex) {
180	0	ex.printStackTrace();
181	0	}
182		}
183	0	}
184
185
186		}

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