URLButton -- a Button-like object that jumps to a URL
/*
* Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
* All rights reserved. Software written by Ian F. Darwin and others.
* $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
*
* 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 THE AUTHOR AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS 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 THE AUTHOR OR CONTRIBUTORS
* 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.
*
* Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
* cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
* pioneering role in inventing and promulgating (and standardizing) the Java
* language and environment is gratefully acknowledged.
*
* The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
* inventing predecessor languages C and C++ is also gratefully acknowledged.
*/
import java.applet.Applet;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Label;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.net.URL;
/**
* URLButton -- a Button-like object that jumps to a URL. MUST have an Applet
* parent since we use Applet methods.
*/
public class URLButton extends Label implements MouseListener {
/** Applet parent, for showStatus() and showDocument(). */
Applet parent;
/** Text to display in label() */
String t;
/** URL to jump to mouseReleased mouseEnter() */
URL u;
/** Construct a URLButton given a URL */
URLButton(Applet parent, String t, URL u) {
super(t);
this.parent = parent;
this.t = t;
this.u = u;
addMouseListener(this);
}
/** paint() method just draws a box around us */
public void paint(Graphics g) {
// super.paint(graphics g);
Dimension d = getSize();
g.drawRect(0, 0, d.width - 1, d.height - 1);
}
/** When mouse enters, showStatus of URL */
public void mouseEntered(MouseEvent e) {
parent.showStatus(u.toExternalForm());
}
/** When mouse enters, clear showStatus */
public void mouseExited(MouseEvent e) {
parent.showStatus("");
}
/** When the button is pressed, go for it! */
public void mousePressed(MouseEvent e) {
parent.showStatus("Showing document at URL " + u);
parent.getAppletContext().showDocument(u);
// No error checking on showDocument() -- the
// browser will honk at the user if the link
// is invalid. We should open "u" ourselves,
// check the open, and close it. Or not...
}
/** NotUsed */
public void mouseClicked(MouseEvent e) {
parent.showStatus("in mouseClicked");
}
/** NotUsed */
public void mouseReleased(MouseEvent e) {
parent.showStatus("in mouseReleased");
}
}
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