MButtonPeer.java

/*
 * Copyright 1995-2001 Sun Microsystems, Inc.  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.  Sun designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */
package sun.awt.motif;

import java.awt.*;
import java.awt.peer.*;
import java.awt.event.ActionEvent;

class MButtonPeer extends MComponentPeer implements ButtonPeer {
    native void create(MComponentPeer peer);
    public native void setLabel(String label);

    MButtonPeer(Button target) {
        super(target);
    }

    public Dimension getMinimumSize() {
        FontMetrics fm = getFontMetrics(target.getFont());
        String label = ((Button)target).getLabel();
        if ( label == null ) {
            label = "";
        }
        return new Dimension(fm.stringWidth(label) + 14,
                             fm.getHeight() + 8);
    }

    public boolean isFocusable() {
        return true;
    }

    // NOTE: This method is called by privileged threads.
    //       DO NOT INVOKE CLIENT CODE ON THIS THREAD!
    public void action(final long when, final int modifiers) {
        MToolkit.executeOnEventHandlerThread(target, new Runnable() {
            public void run() {
                postEvent(new ActionEvent(target, ActionEvent.ACTION_PERFORMED,
                                          ((Button)target).getActionCommand(),
                                          when, modifiers));
            }
        });
    }

    /*
     * Print the native component by rendering the Motif look ourselves.
     * ToDo(aim): needs to query native motif for more accurate size and
     * color information.
     */
    public void print(Graphics g) {
        Button b = (Button)target;
        Dimension d = b.size();
        Color bg = b.getBackground();
        Color fg = b.getForeground();

        g.setColor(bg);
        g.fillRect(2, 2, d.width - 3, d.height - 3);
        draw3DRect(g, bg, 1, 1, d.width - 2, d.height - 2, true);

        g.setColor(fg);
        g.setFont(b.getFont());
        FontMetrics fm = g.getFontMetrics();
        String lbl = b.getLabel();
        g.drawString(lbl, (d.width - fm.stringWidth(lbl)) / 2,
                          (d.height + fm.getMaxAscent() - fm.getMaxDescent()) / 2);

        target.print(g);
    }

    /**
     * DEPRECATED
     */
    public Dimension minimumSize() {
        return getMinimumSize();
    }

}