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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package sun.swing;
import javax.swing.AbstractListModel;
import javax.swing.ComboBoxModel;
import javax.swing.JFileChooser;
import javax.swing.filechooser.FileFilter;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
/**
* Data model for a type-face selection combo-box.
*/
public abstract class AbstractFilterComboBoxModel
extends AbstractListModel<FileFilter>
implements ComboBoxModel<FileFilter>, PropertyChangeListener {
protected FileFilter[] filters;
protected AbstractFilterComboBoxModel() {
this.filters = getFileChooser().getChoosableFileFilters();
}
protected abstract JFileChooser getFileChooser();
@Override
public void propertyChange(PropertyChangeEvent event) {
String property = event.getPropertyName();
if (property == JFileChooser.CHOOSABLE_FILE_FILTER_CHANGED_PROPERTY) {
this.filters = (FileFilter[]) event.getNewValue();
fireContentsChanged(this, -1, -1);
} else if (property == JFileChooser.FILE_FILTER_CHANGED_PROPERTY) {
fireContentsChanged(this, -1, -1);
}
}
@Override
public void setSelectedItem(Object filter) {
if (filter != null) {
getFileChooser().setFileFilter((FileFilter) filter);
fireContentsChanged(this, -1, -1);
}
}
@Override
public Object getSelectedItem() {
// Ensure that the current filter is in the list.
// NOTE: we should not have to do this, since JFileChooser adds
// the filter to the choosable filters list when the filter
// is set. Lets be paranoid just in case someone overrides
// setFileFilter in JFileChooser.
FileFilter currentFilter = getFileChooser().getFileFilter();
if (currentFilter != null) {
for (FileFilter filter : this.filters) {
if (filter == currentFilter) {
return currentFilter;
}
}
getFileChooser().addChoosableFileFilter(currentFilter);
}
return currentFilter;
}
@Override
public int getSize() {
return (this.filters != null)
? filters.length
: 0;
}
@Override
public FileFilter getElementAt(int index) {
if (index >= getSize()) {
// This shouldn't happen. Try to recover gracefully.
return getFileChooser().getFileFilter();
}
return (this.filters != null)
? filters[index]
: null;
}
}
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