jsampler/view/JSMainFrame.java

/*
 *   JSampler - a java front-end for LinuxSampler
 *
 *   Copyright (C) 2005-2009 Grigor Iliev <grigor@grigoriliev.com>
 *
 *   This file is part of JSampler.
 *
 *   JSampler is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License version 2
 *   as published by the Free Software Foundation.
 *
 *   JSampler 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with JSampler; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *   MA  02111-1307  USA
 */

package org.jsampler.view;

import java.awt.Dialog;
import java.awt.Frame;

import java.awt.event.ActionEvent;
import java.awt.event.KeyEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

import java.util.Vector;
import java.util.logging.Level;

import javax.swing.AbstractAction;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.KeyStroke;

import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import org.jsampler.CC;
import org.jsampler.JSampler;
import org.jsampler.SamplerChannelModel;
import org.jsampler.Server;

import org.jsampler.event.SamplerChannelListEvent;
import org.jsampler.event.SamplerChannelListListener;

import org.jsampler.view.SessionViewConfig.ChannelConfig;


/**
 * Defines the skeleton of a JSampler's main frame.
 * @author Grigor Iliev
 */
public abstract class JSMainFrame extends JFrame {
        private final Vector<JSChannelsPane> chnPaneList = new Vector<JSChannelsPane>();
        private boolean autoUpdateChannelListUI = true;
        
        /** Creates a new instance of <code>JSMainFrame</code>. */
        public
        JSMainFrame() {
                super(JSampler.NAME + ' ' + JSampler.VERSION);
                
                setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
                addWindowListener(new WindowAdapter() {
                        public void
                        windowClosing(WindowEvent we) { onWindowClose(); }
                });
                
                CC.getSamplerModel().addSamplerChannelListListener(new EventHandler());
                
                getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put (
                        KeyStroke.getKeyStroke(KeyEvent.VK_G, KeyEvent.CTRL_MASK | KeyEvent.SHIFT_MASK),
                        "RunGarbageCollector"
                );
                
                getRootPane().getActionMap().put ("RunGarbageCollector", new AbstractAction() {
                        public void
                        actionPerformed(ActionEvent e) {
                                System.gc();
                        }
                });
        }
        
        /**
         * Invoked when this window is about to close.
         * Don't forget to call <code>super.onWindowClose()</code> at the end,
         * when override this method.
         */
        public void
        onWindowClose() {
                CC.cleanExit();
        }
        
        /**
         * Invoked on startup when no JSampler home directory is specified
         * or the specified JSampler home directory doesn't exist.
         * This method should ask the user to specify a JSampler
         * home directory and then set the specified JSampler home directory using
         * {@link org.jsampler.CC#setJSamplerHome} method.
         * @see org.jsampler.CC#getJSamplerHome
         * @see org.jsampler.CC#setJSamplerHome
         */
        public abstract void installJSamplerHome();
        
        /**
         * Shows a detailed error information about the specified exception.
         */
        public abstract void showDetailedErrorMessage(Frame owner, String err, String details);
        
        /**
         * Shows a detailed error information about the specified exception.
         */
        public abstract void showDetailedErrorMessage(Dialog owner, String err, String details);

        public abstract void handleConnectionFailure();
        
        protected Vector<ListSelectionListener> channelsPaneListeners = 
                new Vector<ListSelectionListener>();
        
        /**
         * Registers the specified listener for receiving event messages.
         * @param l The <code>ListSelectionListener</code> to register.
         */
        public void
        addChannelsPaneSelectionListener(ListSelectionListener l) {
                channelsPaneListeners.add(l);
        }
        
        /**
         * Removes the specified listener.
         * @param l The <code>ListSelectionListener</code> to remove.
         */
        public void
        removeChannelsPaneSelectionListener(ListSelectionListener l) {
                channelsPaneListeners.remove(l);
        }
        
        protected void
        fireChannelsPaneSelectionChanged() {
                int i = getChannelsPaneIndex(getSelectedChannelsPane());
                ListSelectionEvent e = new ListSelectionEvent(this, i, i, false);
                for(ListSelectionListener l : channelsPaneListeners) l.valueChanged(e);
        }
        
        /**
         * Returns a list containing all <code>JSChannelsPane</code>s added to the view.
         * @return A list containing all <code>JSChannelsPane</code>s added to the view.
         * @see #addChannelsPane
         * @see #removeChannelsPane
         */
        public Vector<JSChannelsPane>
        getChannelsPaneList() { return chnPaneList; }
        
        /**
         * Return the <code>JSChannelsPane</code> at the specified position.
         * @param idx The position of the <code>JSChannelsPane</code> to be returned.
         * @return The <code>JSChannelsPane</code> at the specified position.
         */
        public JSChannelsPane
        getChannelsPane(int idx) { return chnPaneList.get(idx); }
        
        /**
         * Adds the specified <code>JSChannelsPane</code> to the view.
         * @param chnPane The <code>JSChannelsPane</code> to be added.
         */
        public void
        addChannelsPane(JSChannelsPane chnPane) { chnPaneList.add(chnPane); }
        
        /**
         * Removes the specified <code>JSChannelsPane</code> from the view.
         * Override this method to remove <code>chnPane</code> from the view,
         * and don't forget to call <code>super.removeChannelsPane(chnPane);</code>.
         * @param chnPane The <code>JSChannelsPane</code> to be removed.
         * @return <code>true</code> if the specified code>JSChannelsPane</code>
         * is actually removed from the view, <code>false</code> otherwise.
         */
        public boolean
        removeChannelsPane(JSChannelsPane chnPane) { return chnPaneList.remove(chnPane); }
        
        /**
         * Gets the current number of <code>JSChannelsPane</code>s added to the view.
         * @return The current number of <code>JSChannelsPane</code>s added to the view.
         */
        public int
        getChannelsPaneCount() { return chnPaneList.size(); }
        
        /**
         * Returns the index of the specified channels pane, or -1 if
         * the specified channels pane is not found.
         */
        public int
        getChannelsPaneIndex(JSChannelsPane chnPane) {
                return chnPaneList.indexOf(chnPane);
        }
        
        /**
         * Inserts the specified <code>JSChannelsPane</code> at the specified position
         * in the view and in the code>JSChannelsPane</code> list.
         * Where and how this pane will be shown depends on the view/GUI implementation.
         * Note that some GUI implementation may have only one pane containing sampler channels.
         * @param pane The <code>JSChannelsPane</code> to be inserted.
         * @param idx Specifies the position of the <code>JSChannelsPane</code>.
         * @see #getChannelsPaneList
         */
        public abstract void insertChannelsPane(JSChannelsPane pane, int idx);
        
        /**
         * Gets the <code>JSChannelsPane</code> that is currently shown,
         * or has the focus if more than one channels' panes are shown.
         * If the GUI implementation has only one pane containing sampler channels,
         * than this method should always return that pane (the <code>JSChannelsPane</code>
         * with index 0).
         * @return The selected <code>JSChannelsPane</code>.
         */
        public abstract JSChannelsPane getSelectedChannelsPane();
        
        /**
         * Gets the server address to which to connect. If the server should be
         * manually selected, a dialog asking the user to choose a server is displayed.
         */
        public abstract Server getServer();
        
        /**
         * Gets the server address to which to connect. If the server should be
         * manually selected, a dialog asking the user to choose a server is displayed.
         * @param manualSelect Determines whether the server should be manually selected.
         */
        public abstract Server getServer(boolean manualSelect);
        
        /**
         * Sets the <code>JSChannelsPane</code> to be selected.
         * Note that all registered listeners should be notified
         * when the selection is changed.
         * @param pane The <code>JSChannelsPane</code> to be shown.
         * @see #fireChannelsPaneSelectionChanged
         */
        public abstract void setSelectedChannelsPane(JSChannelsPane pane);
        
        private class EventHandler implements SamplerChannelListListener {
                /**
                 * Invoked when a new sampler channel is created.
                 * @param e A <code>SamplerChannelListEvent</code>
                 * instance providing the event information.
                 */
                @Override
                public void
                channelAdded(SamplerChannelListEvent e) {
                        if(e.getChannelModel() == null) return;
                        Integer id = e.getChannelModel().getChannelId();
                        if(findChannel(id) != null) {
                                CC.getLogger().log(Level.WARNING, "JSMainFrame.channelExist!", id);
                                return;
                        }
                        
                        ChannelConfig config = null;
                        JSViewConfig viewConfig = CC.getViewConfig();
                        if(viewConfig != null && viewConfig.getSessionViewConfig() != null) {
                                config = viewConfig.getSessionViewConfig().pollChannelConfig();
                        }
                        
                        if(config == null) {
                                getSelectedChannelsPane().addChannel(e.getChannelModel());
                        } else {
                                int i = config.channelsPanel;
                                if(i >= 0 && i < getChannelsPaneCount()) {
                                        getChannelsPane(i).addChannel(e.getChannelModel(), config);
                                } else {
                                        getSelectedChannelsPane().addChannel(e.getChannelModel(), config);
                                }
                        }
                }
        
                /**
                 * Invoked when a sampler channel is removed.
                 * @param e A <code>SamplerChannelListEvent</code>
                 * instance providing the event information.
                 */
                @Override
                public void
                channelRemoved(SamplerChannelListEvent e) {
                        removeChannel(e.getChannelModel().getChannelId());
                }
        }
        
        /**
         * Searches for the first occurence of a channel with numerical ID <code>id</code>.
         * @return The first occurence of a channel with numerical ID <code>id</code> or
         * <code>null</code> if there is no channel with numerical ID <code>id</code>.
         */
        public JSChannel
        findChannel(int id) {
                if(id < 0) return null;
                
                for(JSChannelsPane cp : getChannelsPaneList()) {
                        for(JSChannel c : cp.getChannels()) if(c.getChannelId() == id) return c;
                }
                
                return null;
        }
        
        /**
         * Removes the first occurence of a channel with numerical ID <code>id</code>.
         * This method is invoked when a sampler channel is removed in the back-end.
         * @return The removed channel or <code>null</code>
         * if there is no channel with numerical ID <code>id</code>.
         */
        public JSChannel
        removeChannel(int id) {
                if(id < 0) return null;
                
                for(JSChannelsPane cp : getChannelsPaneList()) {
                        for(JSChannel c : cp.getChannels()) {
                                if(c.getChannelId() == id) {
                                        cp.removeChannel(c);
                                        return c;
                                }
                        }
                }
                
                return null;
        }
        
        /**
         * Gets the zero-based position of the specified sampler channel
         * in the channels pane, to which the channel is added.
         * Note that the position may change when adding/removing sampler channels.
         * @return The zero-based position of the specified sampler channel
         * in the channels pane, or -1 if the specified channels is not found.
         */
        public int
        getChannelNumber(SamplerChannelModel channel) {
                if(channel == null) return -1;
                
                for(int i = 0; i < getChannelsPaneCount(); i++) {
                        JSChannelsPane chnPane = getChannelsPane(i);
                        for(int j = 0; j < chnPane.getChannelCount(); j++) {
                                if(chnPane.getChannel(j).getChannelId() == channel.getChannelId()) {
                                        return j;
                                }
                        }
                }
                
                return -1;
        }
        
        /**
         * Returns a string in the format <code>channelPaneNumber/channelNumber</code>,
         * where <code>channelPaneNumber</code> is the one-based number of the channels
         * pane containing the specified channel and <code>channelNumber</code> is the
         * one-based number of the channel's position in the channels pane.
         * Note that this path may change when adding/removing channels/channels panes.
         * @return The channels path, or <code>null</code> if the specified channels is not found.
         */
        public String
        getChannelPath(SamplerChannelModel channel) {
                if(channel == null) return null;
                
                for(int i = 0; i < getChannelsPaneCount(); i++) {
                        JSChannelsPane chnPane = getChannelsPane(i);
                        for(int j = 0; j < chnPane.getChannelCount(); j++) {
                                if(chnPane.getChannel(j).getChannelId() == channel.getChannelId()) {
                                        return (i + 1) + "." + (j + 1);
                                }
                        }
                }
                
                return null;
        }
        
        /**
         * Gets the zero-based number of the channels pane,
         * to which the specified sampler channel is added.
         * Note that the can be moved from one channels pane to another.
         * @return The zero-based index of the channels pane,
         * to which the specified sampler channel is added, or
         * -1 if the specified channels is not found.
         */
        public int
        getChannelsPaneNumber(SamplerChannelModel channel) {
                if(channel == null) return -1;
                
                for(int i = 0; i < getChannelsPaneCount(); i++) {
                        JSChannelsPane chnPane = getChannelsPane(i);
                        for(int j = 0; j < chnPane.getChannelCount(); j++) {
                                if(chnPane.getChannel(j).getChannelId() == channel.getChannelId()) {
                                        return i;
                                }
                        }
                }
                
                return -1;
        }
        
        /**
         * Sends the specified script to the backend.
         * @param script The file name of the script to run.
         */
        public abstract void runScript(String script);
        
        /**
         * Determines whether the channel list UI should be automatically updated
         * when channel is added/removed. The default value is <code>true</code>.
         */
        public boolean
        getAutoUpdateChannelListUI() { return autoUpdateChannelListUI; }
        
        /**
         * Determines whether the channel list UI should be automatically updated
         * when channel is added/removed.
         */
        public void
        setAutoUpdateChannelListUI(boolean b) {
                if(b == autoUpdateChannelListUI) return;
                
                autoUpdateChannelListUI = b;
                for(JSChannelsPane cp : getChannelsPaneList()) {
                        cp.setAutoUpdate(b);
                }
        }
        
        /**
         * Updates the channel list UI.
         */
        public void
        updateChannelListUI() {
                for(JSChannelsPane cp : getChannelsPaneList()) {
                        cp.updateChannelListUI();
                }
        }
}
1	/*
2	* JSampler - a java front-end for LinuxSampler
3	*
4	* Copyright (C) 2005-2009 Grigor Iliev <grigor@grigoriliev.com>
5	*
6	* This file is part of JSampler.
7	*
8	* JSampler is free software; you can redistribute it and/or modify
9	* it under the terms of the GNU General Public License version 2
10	* as published by the Free Software Foundation.
11	*
12	* JSampler is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with JSampler; if not, write to the Free Software
19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
20	* MA 02111-1307 USA
21	*/
22
23	package org.jsampler.view;
24
25	import java.awt.Dialog;
26	import java.awt.Frame;
27
28	import java.awt.event.ActionEvent;
29	import java.awt.event.KeyEvent;
30	import java.awt.event.WindowAdapter;
31	import java.awt.event.WindowEvent;
32
33	import java.util.Vector;
34	import java.util.logging.Level;
35
36	import javax.swing.AbstractAction;
37	import javax.swing.JComponent;
38	import javax.swing.JFrame;
39	import javax.swing.KeyStroke;
40
41	import javax.swing.event.ListSelectionEvent;
42	import javax.swing.event.ListSelectionListener;
43
44	import org.jsampler.CC;
45	import org.jsampler.JSampler;
46	import org.jsampler.SamplerChannelModel;
47	import org.jsampler.Server;
48
49	import org.jsampler.event.SamplerChannelListEvent;
50	import org.jsampler.event.SamplerChannelListListener;
51
52	import org.jsampler.view.SessionViewConfig.ChannelConfig;
53
54
55	/**
56	* Defines the skeleton of a JSampler's main frame.
57	* @author Grigor Iliev
58	*/
59	public abstract class JSMainFrame extends JFrame {
60	private final Vector<JSChannelsPane> chnPaneList = new Vector<JSChannelsPane>();
61	private boolean autoUpdateChannelListUI = true;
62
63	/** Creates a new instance of <code>JSMainFrame</code>. */
64	public
65	JSMainFrame() {
66	super(JSampler.NAME + ' ' + JSampler.VERSION);
67
68	setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
69	addWindowListener(new WindowAdapter() {
70	public void
71	windowClosing(WindowEvent we) { onWindowClose(); }
72	});
73
74	CC.getSamplerModel().addSamplerChannelListListener(new EventHandler());
75
76	getRootPane().getInputMap(JComponent.WHEN_ANCESTOR_OF_FOCUSED_COMPONENT).put (
77	KeyStroke.getKeyStroke(KeyEvent.VK_G, KeyEvent.CTRL_MASK \| KeyEvent.SHIFT_MASK),
78	"RunGarbageCollector"
79	);
80
81	getRootPane().getActionMap().put ("RunGarbageCollector", new AbstractAction() {
82	public void
83	actionPerformed(ActionEvent e) {
84	System.gc();
85	}
86	});
87	}
88
89	/**
90	* Invoked when this window is about to close.
91	* Don't forget to call <code>super.onWindowClose()</code> at the end,
92	* when override this method.
93	*/
94	public void
95	onWindowClose() {
96	CC.cleanExit();
97	}
98
99	/**
100	* Invoked on startup when no JSampler home directory is specified
101	* or the specified JSampler home directory doesn't exist.
102	* This method should ask the user to specify a JSampler
103	* home directory and then set the specified JSampler home directory using
104	* {@link org.jsampler.CC#setJSamplerHome} method.
105	* @see org.jsampler.CC#getJSamplerHome
106	* @see org.jsampler.CC#setJSamplerHome
107	*/
108	public abstract void installJSamplerHome();
109
110	/**
111	* Shows a detailed error information about the specified exception.
112	*/
113	public abstract void showDetailedErrorMessage(Frame owner, String err, String details);
114
115	/**
116	* Shows a detailed error information about the specified exception.
117	*/
118	public abstract void showDetailedErrorMessage(Dialog owner, String err, String details);
119
120	public abstract void handleConnectionFailure();
121
122	protected Vector<ListSelectionListener> channelsPaneListeners =
123	new Vector<ListSelectionListener>();
124
125	/**
126	* Registers the specified listener for receiving event messages.
127	* @param l The <code>ListSelectionListener</code> to register.
128	*/
129	public void
130	addChannelsPaneSelectionListener(ListSelectionListener l) {
131	channelsPaneListeners.add(l);
132	}
133
134	/**
135	* Removes the specified listener.
136	* @param l The <code>ListSelectionListener</code> to remove.
137	*/
138	public void
139	removeChannelsPaneSelectionListener(ListSelectionListener l) {
140	channelsPaneListeners.remove(l);
141	}
142
143	protected void
144	fireChannelsPaneSelectionChanged() {
145	int i = getChannelsPaneIndex(getSelectedChannelsPane());
146	ListSelectionEvent e = new ListSelectionEvent(this, i, i, false);
147	for(ListSelectionListener l : channelsPaneListeners) l.valueChanged(e);
148	}
149
150	/**
151	* Returns a list containing all <code>JSChannelsPane</code>s added to the view.
152	* @return A list containing all <code>JSChannelsPane</code>s added to the view.
153	* @see #addChannelsPane
154	* @see #removeChannelsPane
155	*/
156	public Vector<JSChannelsPane>
157	getChannelsPaneList() { return chnPaneList; }
158
159	/**
160	* Return the <code>JSChannelsPane</code> at the specified position.
161	* @param idx The position of the <code>JSChannelsPane</code> to be returned.
162	* @return The <code>JSChannelsPane</code> at the specified position.
163	*/
164	public JSChannelsPane
165	getChannelsPane(int idx) { return chnPaneList.get(idx); }
166
167	/**
168	* Adds the specified <code>JSChannelsPane</code> to the view.
169	* @param chnPane The <code>JSChannelsPane</code> to be added.
170	*/
171	public void
172	addChannelsPane(JSChannelsPane chnPane) { chnPaneList.add(chnPane); }
173
174	/**
175	* Removes the specified <code>JSChannelsPane</code> from the view.
176	* Override this method to remove <code>chnPane</code> from the view,
177	* and don't forget to call <code>super.removeChannelsPane(chnPane);</code>.
178	* @param chnPane The <code>JSChannelsPane</code> to be removed.
179	* @return <code>true</code> if the specified code>JSChannelsPane</code>
180	* is actually removed from the view, <code>false</code> otherwise.
181	*/
182	public boolean
183	removeChannelsPane(JSChannelsPane chnPane) { return chnPaneList.remove(chnPane); }
184
185	/**
186	* Gets the current number of <code>JSChannelsPane</code>s added to the view.
187	* @return The current number of <code>JSChannelsPane</code>s added to the view.
188	*/
189	public int
190	getChannelsPaneCount() { return chnPaneList.size(); }
191
192	/**
193	* Returns the index of the specified channels pane, or -1 if
194	* the specified channels pane is not found.
195	*/
196	public int
197	getChannelsPaneIndex(JSChannelsPane chnPane) {
198	return chnPaneList.indexOf(chnPane);
199	}
200
201	/**
202	* Inserts the specified <code>JSChannelsPane</code> at the specified position
203	* in the view and in the code>JSChannelsPane</code> list.
204	* Where and how this pane will be shown depends on the view/GUI implementation.
205	* Note that some GUI implementation may have only one pane containing sampler channels.
206	* @param pane The <code>JSChannelsPane</code> to be inserted.
207	* @param idx Specifies the position of the <code>JSChannelsPane</code>.
208	* @see #getChannelsPaneList
209	*/
210	public abstract void insertChannelsPane(JSChannelsPane pane, int idx);
211
212	/**
213	* Gets the <code>JSChannelsPane</code> that is currently shown,
214	* or has the focus if more than one channels' panes are shown.
215	* If the GUI implementation has only one pane containing sampler channels,
216	* than this method should always return that pane (the <code>JSChannelsPane</code>
217	* with index 0).
218	* @return The selected <code>JSChannelsPane</code>.
219	*/
220	public abstract JSChannelsPane getSelectedChannelsPane();
221
222	/**
223	* Gets the server address to which to connect. If the server should be
224	* manually selected, a dialog asking the user to choose a server is displayed.
225	*/
226	public abstract Server getServer();
227
228	/**
229	* Gets the server address to which to connect. If the server should be
230	* manually selected, a dialog asking the user to choose a server is displayed.
231	* @param manualSelect Determines whether the server should be manually selected.
232	*/
233	public abstract Server getServer(boolean manualSelect);
234
235	/**
236	* Sets the <code>JSChannelsPane</code> to be selected.
237	* Note that all registered listeners should be notified
238	* when the selection is changed.
239	* @param pane The <code>JSChannelsPane</code> to be shown.
240	* @see #fireChannelsPaneSelectionChanged
241	*/
242	public abstract void setSelectedChannelsPane(JSChannelsPane pane);
243
244	private class EventHandler implements SamplerChannelListListener {
245	/**
246	* Invoked when a new sampler channel is created.
247	* @param e A <code>SamplerChannelListEvent</code>
248	* instance providing the event information.
249	*/
250	@Override
251	public void
252	channelAdded(SamplerChannelListEvent e) {
253	if(e.getChannelModel() == null) return;
254	Integer id = e.getChannelModel().getChannelId();
255	if(findChannel(id) != null) {
256	CC.getLogger().log(Level.WARNING, "JSMainFrame.channelExist!", id);
257	return;
258	}
259
260	ChannelConfig config = null;
261	JSViewConfig viewConfig = CC.getViewConfig();
262	if(viewConfig != null && viewConfig.getSessionViewConfig() != null) {
263	config = viewConfig.getSessionViewConfig().pollChannelConfig();
264	}
265
266	if(config == null) {
267	getSelectedChannelsPane().addChannel(e.getChannelModel());
268	} else {
269	int i = config.channelsPanel;
270	if(i >= 0 && i < getChannelsPaneCount()) {
271	getChannelsPane(i).addChannel(e.getChannelModel(), config);
272	} else {
273	getSelectedChannelsPane().addChannel(e.getChannelModel(), config);
274	}
275	}
276	}
277
278	/**
279	* Invoked when a sampler channel is removed.
280	* @param e A <code>SamplerChannelListEvent</code>
281	* instance providing the event information.
282	*/
283	@Override
284	public void
285	channelRemoved(SamplerChannelListEvent e) {
286	removeChannel(e.getChannelModel().getChannelId());
287	}
288	}
289
290	/**
291	* Searches for the first occurence of a channel with numerical ID <code>id</code>.
292	* @return The first occurence of a channel with numerical ID <code>id</code> or
293	* <code>null</code> if there is no channel with numerical ID <code>id</code>.
294	*/
295	public JSChannel
296	findChannel(int id) {
297	if(id < 0) return null;
298
299	for(JSChannelsPane cp : getChannelsPaneList()) {
300	for(JSChannel c : cp.getChannels()) if(c.getChannelId() == id) return c;
301	}
302
303	return null;
304	}
305
306	/**
307	* Removes the first occurence of a channel with numerical ID <code>id</code>.
308	* This method is invoked when a sampler channel is removed in the back-end.
309	* @return The removed channel or <code>null</code>
310	* if there is no channel with numerical ID <code>id</code>.
311	*/
312	public JSChannel
313	removeChannel(int id) {
314	if(id < 0) return null;
315
316	for(JSChannelsPane cp : getChannelsPaneList()) {
317	for(JSChannel c : cp.getChannels()) {
318	if(c.getChannelId() == id) {
319	cp.removeChannel(c);
320	return c;
321	}
322	}
323	}
324
325	return null;
326	}
327
328	/**
329	* Gets the zero-based position of the specified sampler channel
330	* in the channels pane, to which the channel is added.
331	* Note that the position may change when adding/removing sampler channels.
332	* @return The zero-based position of the specified sampler channel
333	* in the channels pane, or -1 if the specified channels is not found.
334	*/
335	public int
336	getChannelNumber(SamplerChannelModel channel) {
337	if(channel == null) return -1;
338
339	for(int i = 0; i < getChannelsPaneCount(); i++) {
340	JSChannelsPane chnPane = getChannelsPane(i);
341	for(int j = 0; j < chnPane.getChannelCount(); j++) {
342	if(chnPane.getChannel(j).getChannelId() == channel.getChannelId()) {
343	return j;
344	}
345	}
346	}
347
348	return -1;
349	}
350
351	/**
352	* Returns a string in the format <code>channelPaneNumber/channelNumber</code>,
353	* where <code>channelPaneNumber</code> is the one-based number of the channels
354	* pane containing the specified channel and <code>channelNumber</code> is the
355	* one-based number of the channel's position in the channels pane.
356	* Note that this path may change when adding/removing channels/channels panes.
357	* @return The channels path, or <code>null</code> if the specified channels is not found.
358	*/
359	public String
360	getChannelPath(SamplerChannelModel channel) {
361	if(channel == null) return null;
362
363	for(int i = 0; i < getChannelsPaneCount(); i++) {
364	JSChannelsPane chnPane = getChannelsPane(i);
365	for(int j = 0; j < chnPane.getChannelCount(); j++) {
366	if(chnPane.getChannel(j).getChannelId() == channel.getChannelId()) {
367	return (i + 1) + "." + (j + 1);
368	}
369	}
370	}
371
372	return null;
373	}
374
375	/**
376	* Gets the zero-based number of the channels pane,
377	* to which the specified sampler channel is added.
378	* Note that the can be moved from one channels pane to another.
379	* @return The zero-based index of the channels pane,
380	* to which the specified sampler channel is added, or
381	* -1 if the specified channels is not found.
382	*/
383	public int
384	getChannelsPaneNumber(SamplerChannelModel channel) {
385	if(channel == null) return -1;
386
387	for(int i = 0; i < getChannelsPaneCount(); i++) {
388	JSChannelsPane chnPane = getChannelsPane(i);
389	for(int j = 0; j < chnPane.getChannelCount(); j++) {
390	if(chnPane.getChannel(j).getChannelId() == channel.getChannelId()) {
391	return i;
392	}
393	}
394	}
395
396	return -1;
397	}
398
399	/**
400	* Sends the specified script to the backend.
401	* @param script The file name of the script to run.
402	*/
403	public abstract void runScript(String script);
404
405	/**
406	* Determines whether the channel list UI should be automatically updated
407	* when channel is added/removed. The default value is <code>true</code>.
408	*/
409	public boolean
410	getAutoUpdateChannelListUI() { return autoUpdateChannelListUI; }
411
412	/**
413	* Determines whether the channel list UI should be automatically updated
414	* when channel is added/removed.
415	*/
416	public void
417	setAutoUpdateChannelListUI(boolean b) {
418	if(b == autoUpdateChannelListUI) return;
419
420	autoUpdateChannelListUI = b;
421	for(JSChannelsPane cp : getChannelsPaneList()) {
422	cp.setAutoUpdate(b);
423	}
424	}
425
426	/**
427	* Updates the channel list UI.
428	*/
429	public void
430	updateChannelListUI() {
431	for(JSChannelsPane cp : getChannelsPaneList()) {
432	cp.updateChannelListUI();
433	}
434	}
435	}