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89 lines
3.3 KiB
Java
89 lines
3.3 KiB
Java
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/*
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* Copyright 2003-2004, Franz-Josef Elmer, All rights reserved
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details
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* (http://www.gnu.org/copyleft/lesser.html).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package jcckit.plot;
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/**
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* A plot event signales some changes of a {@link Plot}.
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* It has three attributes:
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* <ul><li><b>source</b>: Indicates the <tt>Plot</tt> instance responsible
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* for this event.
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* <li><b>type</b>: The type of event.
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* <li><b>message</b>: The message object. Its meaning depends on the
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* type of event:
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* <table border=1 cellpadding=5>
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* <tr><th>Type</th><th>Meaning of the message object</th></tr>
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* <tr><td>{@link PlotEventType#DATA_PLOT_CONNECTED},
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* {@link PlotEventType#DATA_PLOT_DISCONNECTED}</td>
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* <td>The {@link jcckit.data.DataPlot} (dis)connected with the
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* {@link Plot} instance specified by the source.</td>
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* <tr><td>{@link PlotEventType#DATA_PLOT_CHANGED}</td>
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* <td>An <tt>Integer</tt> indicating the lowest index of
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* those curves which have been changed.</td>
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* <tr><td>{@link PlotEventType#DATA_CURVE_CHANGED}</td>
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* <td>An <tt>Integer</tt> indicating the index of the curve
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* which has been changed.</td>
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* </table>
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* </ul>
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*
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*
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* @author Franz-Josef Elmer
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*/
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public class PlotEvent {
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private final Plot _source;
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private final PlotEventType _type;
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private final Object _message;
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/**
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* Creates a new event for the specified source, type, and message.
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* @param source Plot causing this event.
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* @param type Type of the event. Possible values are
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* {@link PlotEventType#DATA_PLOT_CHANGED},
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* {@link PlotEventType#DATA_CURVE_CHANGED},
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* {@link PlotEventType#DATA_PLOT_CONNECTED}, and
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* {@link PlotEventType#DATA_PLOT_DISCONNECTED}.
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* @param message Message object. Can be <tt>null</tt>
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*/
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public PlotEvent(Plot source, PlotEventType type, Object message) {
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_source = source;
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_type = type;
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_message = message;
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}
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/** Returns the source of this event. */
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public Plot getSource() {
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return _source;
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}
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/**
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* Returns the event type.
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* @return either {@link PlotEventType#DATA_PLOT_CHANGED},
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* {@link PlotEventType#DATA_CURVE_CHANGED},
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* {@link PlotEventType#DATA_PLOT_CONNECTED}, or
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* {@link PlotEventType#DATA_PLOT_DISCONNECTED}.
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*/
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public PlotEventType getType() {
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return _type;
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}
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/** Returns the message object. */
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public Object getMessage() {
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return _message;
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}
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}
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