multilinelabel.java

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/*
 * Copyright (c) 1998-2002 Carnegie Mellon University.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
 * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

package rcm.awt;

import java.awt.*;

public class MultiLineLabel extends Canvas {
    private String text;
    private MultiLineString multilabel;
    private int alignment;

    private Dimension minSize;  // cached result of getMinimumSize()

    public MultiLineLabel (String string) {
        setText (string);
        setAlignment (Label.LEFT);
    }

    public MultiLineLabel (String string, int alignment) {
        setText (string);
        setAlignment (alignment);
    }

    public String getText () {
        return text;
    }
    public void setText (String string) {
        text = string;
        multilabel = new MultiLineString (string);
        minSize = null;
    }

    public int getAlignment () {
        return alignment;
    }
    public void setAlignment (int align) {
        alignment = align;
    }

    public void setFont (Font font) {
        super.setFont (font);
        minSize = null;
    }

    public Dimension minimumSize () {
        // FIX: cache this size
        if (minSize == null) {
            FontMetrics fm = getFontMetrics (getFont ());
            minSize = new Dimension (multilabel.getWidth (fm),
                                     multilabel.getHeight (fm));
        }
        return minSize;
    }

    public Dimension preferredSize () {
        return minimumSize ();
    }

    public synchronized void paint (Graphics g) {
        g.setFont (getFont ());
        multilabel.draw (g, 0, 0, alignment);
    }
}