001    /*
002      Copyright (C) 2003 Laurent Martelli <laurent@aopsys.com>
003      
004      This program is free software; you can redistribute it and/or modify
005      it under the terms of the GNU Lesser General Public License as
006      published by the Free Software Foundation; either version 2 of the
007      License, or (at your option) any later version.
008    
009      This program is distributed in the hope that it will be useful, but
010      WITHOUT ANY WARRANTY; without even the implied warranty of
011      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
012      Lesser General Public License for more details.
013    
014      You should have received a copy of the GNU Lesser General Public
015      License along with this program; if not, write to the Free Software
016      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
017      USA */
018    
019    package org.objectweb.jac.aspects.gui.swing;
020    
021    import javax.swing.JComponent;
022    import javax.swing.JLabel;
023    import org.objectweb.jac.aspects.gui.FieldView;
024    import org.objectweb.jac.aspects.gui.Format;
025    import org.objectweb.jac.core.rtti.FieldItem;
026    
027    /**
028     * A Swing viewer component for date values.
029     */
030    
031    public abstract class FormatViewer extends AbstractFieldView
032        implements FieldView
033    {   
034        /** Stores the default format of the date */
035        protected Format format;
036        protected JLabel label = new JLabel();
037    
038        /**
039        * Constructs a new date editor. */
040    
041        public FormatViewer(Object value, Object substance, FieldItem field) {
042            super(substance,field);
043            initFormat(field);
044            setValue(value);
045            add(label);
046        }
047    
048        public FormatViewer() {
049            setTableFont();
050            setLayout();
051            add(label);
052        }
053    
054        protected abstract void initFormat(FieldItem field);
055    
056        protected void setLayout() {
057        }
058    
059        public void setField(FieldItem field) {
060            super.setField(field);
061            initFormat(field);
062        }
063    
064        // FieldView interface
065    
066        public void setValue(Object value) {
067            if (value!=null)
068                label.setText(format.format(value));
069            else
070                label.setText("");
071        }
072    
073        protected JComponent getComponent() {
074            return label;
075        }
076    }