/* |
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* Copyright (c) 1998, 2001, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.colorchooser; |
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import javax.swing.*; |
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import javax.swing.event.*; |
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import java.awt.Color; |
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import java.io.Serializable; |
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/** |
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* A generic implementation of <code>ColorSelectionModel</code>. |
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* |
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* @author Steve Wilson |
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* |
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* @see java.awt.Color |
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*/ |
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public class DefaultColorSelectionModel implements ColorSelectionModel, Serializable { |
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/** |
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* Only one <code>ChangeEvent</code> is needed per model instance |
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* since the event's only (read-only) state is the source property. |
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* The source of events generated here is always "this". |
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*/ |
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protected transient ChangeEvent changeEvent = null; |
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protected EventListenerList listenerList = new EventListenerList(); |
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private Color selectedColor; |
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/** |
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* Creates a <code>DefaultColorSelectionModel</code> with the |
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* current color set to <code>Color.white</code>. This is |
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* the default constructor. |
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*/ |
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public DefaultColorSelectionModel() { |
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selectedColor = Color.white; |
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} |
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/** |
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* Creates a <code>DefaultColorSelectionModel</code> with the |
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* current color set to <code>color</code>, which should be |
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* non-<code>null</code>. Note that setting the color to |
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* <code>null</code> is undefined and may have unpredictable |
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* results. |
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* |
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* @param color the new <code>Color</code> |
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*/ |
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public DefaultColorSelectionModel(Color color) { |
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selectedColor = color; |
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} |
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/** |
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* Returns the selected <code>Color</code> which should be |
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* non-<code>null</code>. |
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* |
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* @return the selected <code>Color</code> |
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*/ |
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public Color getSelectedColor() { |
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return selectedColor; |
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} |
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/** |
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* Sets the selected color to <code>color</code>. |
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* Note that setting the color to <code>null</code> |
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* is undefined and may have unpredictable results. |
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* This method fires a state changed event if it sets the |
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* current color to a new non-<code>null</code> color; |
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* if the new color is the same as the current color, |
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* no event is fired. |
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* |
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* @param color the new <code>Color</code> |
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*/ |
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public void setSelectedColor(Color color) { |
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if (color != null && !selectedColor.equals(color)) { |
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selectedColor = color; |
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fireStateChanged(); |
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} |
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} |
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/** |
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* Adds a <code>ChangeListener</code> to the model. |
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* |
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* @param l the <code>ChangeListener</code> to be added |
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*/ |
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public void addChangeListener(ChangeListener l) { |
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listenerList.add(ChangeListener.class, l); |
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} |
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/** |
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* Removes a <code>ChangeListener</code> from the model. |
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* @param l the <code>ChangeListener</code> to be removed |
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*/ |
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public void removeChangeListener(ChangeListener l) { |
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listenerList.remove(ChangeListener.class, l); |
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} |
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/** |
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* Returns an array of all the <code>ChangeListener</code>s added |
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* to this <code>DefaultColorSelectionModel</code> with |
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* <code>addChangeListener</code>. |
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* |
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* @return all of the <code>ChangeListener</code>s added, or an empty |
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* array if no listeners have been added |
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* @since 1.4 |
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*/ |
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public ChangeListener[] getChangeListeners() { |
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return listenerList.getListeners(ChangeListener.class); |
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} |
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/** |
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* Runs each <code>ChangeListener</code>'s |
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* <code>stateChanged</code> method. |
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* |
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* <!-- @see #setRangeProperties //bad link--> |
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* @see EventListenerList |
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*/ |
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protected void fireStateChanged() |
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{ |
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Object[] listeners = listenerList.getListenerList(); |
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for (int i = listeners.length - 2; i >= 0; i -=2 ) { |
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if (listeners[i] == ChangeListener.class) { |
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if (changeEvent == null) { |
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changeEvent = new ChangeEvent(this); |
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} |
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((ChangeListener)listeners[i+1]).stateChanged(changeEvent); |
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} |
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} |
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} |
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} |