GenericComponentShadow.java revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* ident "%Z%%M% %I% %E% SMI"
*
* Copyright (c) 2000 by Sun Microsystems, Inc.
* All rights reserved.
*/
/*
* Copyright (C) 1996 Active Software, Inc.
* All rights reserved.
*
* @(#) GenericComponentShadow.java 1.14 - last change made 07/25/97
*/
package sunsoft.jws.visual.rt.shadow;
import sunsoft.jws.visual.rt.shadow.java.awt.CanvasShadow;
import sunsoft.jws.visual.rt.awt.GBPanel;
import sunsoft.jws.visual.rt.base.VJException;
import sunsoft.jws.visual.rt.base.Global;
import java.awt.Button;
import java.awt.Component;
/**
* Wraps an AWT widget. The attributes available for this
* class are listed below. In the type column, type names beginning
* with "sunsoft.jws.visual.rt" have been abbreviated to begin with
* "rt".
*
* < pre>
name type default value
-----------------------------------------------------------------------
class java.lang.String java.awt.Button
* < /pre>
*
* class: the java class(that must be a sub-class of
* java.awt.Component and have a null constructor) of a user-written
* AWT class that there is no wrapper shadow class for yet.
* GenericComponentShadow is useful for quickly incorporating a user's
* existing custom AWT components in a Visual Java GUI.
* < p>
* Check the super class for additional attributes.
*
* @see Component
* @see GenericWindowShadow
* @version 1.14, 07/25/97
*/
public class GenericComponentShadow extends CanvasShadow {
private String className;
private Class genericClass;
public GenericComponentShadow() {
attributes.add(/* NOI18N */"class",
/* NOI18N */"java.lang.String",
/* NOI18N */"java.awt.Button", NOEDITOR);
}
protected Object getOnBody(String key) {
if (key.equals(/* NOI18N */"class"))
return getFromTable(/* NOI18N */"class");
else
return super.getOnBody(key);
}
protected void setOnBody(String key, Object value) {
if (key.equals(/* NOI18N */"class")) {
// Don't create a new instance unless the
// class name has changed
if (className.equals((String)value))
return;
Object obj = loadClass((String)value);
destroy();
body = obj;
create();
}
else
super.setOnBody(key, value);
}
public void createBody() {
body = loadClass((String)get(/* NOI18N */"class"));
}
private Object loadClass(String name) {
Class c;
Object obj;
// Load the class if the name doesn't match the previous name
if (!name.equals(className)) {
try {
c = Class.forName(name);
}
catch (ClassNotFoundException ex) {
throw new VJException(Global.fmtMsg(
/* JSTYLED */
"sunsoft.jws.visual.rt.shadow.GenericComponentShadow.FMT.1",
Global.getMsg(
/* JSTYLED */
"sunsoft.jws.visual.rt.shadow.GenericComponentShadow.Class__not__found"),
name));
}
} else {
c = genericClass;
}
// Create a new instance from the class
try {
obj = c.newInstance();
if (!(obj instanceof Component)) {
throw new VJException(
/* JSTYLED */
Global.fmtMsg("sunsoft.jws.visual.rt.shadow.GenericComponentShadow.NotAComponentSubclass", name));
}
}
catch (IllegalAccessException ex) {
throw new VJException(
/* JSTYLED */
Global.fmtMsg("sunsoft.jws.visual.rt.shadow.GenericComponentShadow.IllegalAccess", name));
}
catch (InstantiationException ex) {
throw new VJException(
/* JSTYLED */
Global.fmtMsg("sunsoft.jws.visual.rt.shadow.GenericComponentShadow.InstantiationException", name));
}
catch (NoSuchMethodError ex) {
throw new VJException(
/* JSTYLED */
Global.fmtMsg("sunsoft.jws.visual.rt.shadow.GenericComponentShadow.Noconstructor", name));
}
// No errors occurred, so update the name and class variables.
genericClass = c;
className = name;
// Set the runtime flag for GBPanel instances
if ((obj instanceof GBPanel) && inDesignerRoot())
((GBPanel)obj).setRuntime(false);
return obj;
}
}