🚀 go-pugleaf

Hi,
    this is about plugging in a custom LookAndFeel in Swing - newbies
beware!
    I've been trying to install a custom LookAndFeel class (source shown at
bottom), and crazy things are going on. I've tried everything I can think
of.  You are supposed to be able to call
UIManager.setLookAndFeel("com.spiritone.gus.swing.ShadowLookAndFeel");
with the full qualified class name, but it just fails with a
ClassNotFoundException,  which is crazy because, I know for a fact the class
files are in the right place (relative to the CLASSPATH), I can load them ok
with Class.forName() in the very code block.
    I've tried the other form of the UIManager.setLookAndFeel( ) method,
passing in an instance of the LookAndFeel, and that works UNTIL you try to
instantiate a Swing component, then the getUI( ) method fails, with a
ClassNotFoundException on the ShadowButtonUI class,  which is also there, in
the correct place, and which I can instantiate and test, without going
through UIManager !
    I've tried this in a static { } initializer, in the init( ) method, in
the main( ) method of an Application, they all fail in the same way.  Its
driving me nuts !    Any bright ideas are very gratefully accepted
mailto:gus@spiritone.com     Thanks !

Here's the Swing JApplet :
package JButton;

import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import javax.swing.*;
import javax.swing.plaf.*;
import com.spiritone.gus.swing.*;

public class Applet2 extends JApplet {
  boolean isStandalone = false;
  JPanel jPanel1 = new JPanel();
  JButton jButton1;
  //Pluggable LookAndFeel classes and ComponentUI
  ButtonUI ui;
  private static Class lnfClass, uiClass;

  FlowLayout flowLayout1 = new FlowLayout();

  //Initialize the applet
  public void init() {
    try {
      System.out.println("Applet2 Setting Look & Feel:");
      //UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());

//UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName())
;

      /* I get a ClassNotFound Exception here !
       * This sucks, because I've successfully loaded the class already with
Class.forName() above ?
       *
UIManager.setLookAndFeel("com.spiritone.gus.swing.ShadowLookAndFeel");
       */

      /* This one works, until a JButton is instantiated, it fails to load
the ButtonUI class:
       * UIDefaults.getUI() failed: no ComponentUI class for:
javax.swing.JButton (see below)
       */
      UIManager.setLookAndFeel((LookAndFeel)(lnfClass.newInstance()));
      System.out.println("UIManager L&F=" +
UIManager.getLookAndFeel().getDescription());
      uiClass =
Class.forName(UIManager.getDefaults().getString("ButtonUI"));
      System.out.println("ButtonUI Class loaded OK =" + uiClass.getName());

    }
    catch (ClassNotFoundException e1) {
      System.out.println("LookAndFeel : class notfound");
      e1.printStackTrace(System.out);
    }
    catch (Exception e2) {
      System.out.println("LookAndFeel : unavailable");
      e2.printStackTrace(System.out);
    }

    try  {
      jbInit();
    }
    catch(Exception e3)  {
      e3.printStackTrace();
    }
  }

  //Component initialization
  private void jbInit() throws Exception {
    System.out.println("Applet2 CodeBase=" + getCodeBase());
    //this.setSize(new Dimension(300, 100));
    System.out.println("About to create JButton");
    jButton1 = new JButton();
    jButton1.setText("Shadow JButton");
    System.out.println("UIDefaults getUI for JButton=" +
UIManager.getDefaults().getUI(jButton1));
    /* Test the ShadowButtonUI without loading the whole LookAndFeel - works
fine!
     * ui = (ButtonUI)ShadowButtonUI.createUI(jButton1);
     * jButton1.setUI(ui);
     */

    jPanel1.setLayout(flowLayout1);
    jPanel1.setBackground(Color.white);
    this.getContentPane().add(jPanel1, BorderLayout.CENTER);
    jPanel1.add(jButton1, null);
  }

  //Get Applet information
  public String getAppletInfo() {
    return "ShadowLookAndFeel Button Applet";
  }

  //static initializer for setting look & feel
  static {
    // LookAndFeel Class Loaded OK here
    try {
      lnfClass = Class.forName("com.spiritone.gus.swing.ShadowLookAndFeel");
      if (lnfClass != null) {
        System.out.println("L&F Class loaded OK =" + lnfClass.getName());
      }
    }
    catch (ClassNotFoundException e1) {
      System.out.println("LookAndFeel : class notfound");
      e1.printStackTrace(System.out);
    }
    catch (Exception e2) {
      System.out.println("LookAndFeel : unavailable");
      e2.printStackTrace(System.out);
    }
  }
}

Here's the problem (this is running under Appletviewer and JDK 1.2):

C:\JBUILDER3\java\bin\AppletViewer.exe -J-Djava.security.policy=C:\JBUILDER3
\lib\appletviewer.policy -J-Djava.class.path=C:\JBuilder3\myclasses;C:\JBUIL
DER3\lib\dx3.0.jar;C:\JBUILDER3\lib\dx3.0-res.jar;C:\JBUILDER3\lib\jbcl3.0.j
ar;C:\JBUILDER3\lib\jbcl3.0-res.jar;C:\JBUILDER3\lib\jgl3.1.0.jar;C:\JBUILDE
R3\lib\dbswing3.0.jar;C:\JBUILDER3\lib\dbswing3.0-res.jar;C:\JBUILDER3\java\
lib\jdkdep.jar;C:\JBUILDER3\java\jre\lib\rt.jar;C:\JBUILDER3\java\lib\dt.jar
;C:\JBUILDER3\java\jre\lib\i18n.jar;C:\JBUILDER3\java\lib\tools.jar
C:\JBuilder3\myclasses\JButton.Applet2.html
AppAccelerator(tm) 1.2.010 for Java (JDK 1.2), x86 version.
Copyright (c) 1997-1999 Inprise Corporation. All Rights Reserved.
L&F Class loaded OK =com.spiritone.gus.swing.ShadowLookAndFeel
Applet2 Setting Look & Feel:
UIManager L&F=Components with offset shadows
ButtonUI Class loaded OK =com.spiritone.gus.swing.ShadowButtonUI
Applet2 CodeBase=file:/C:/JBuilder3/myclasses/
About to create JButton
UIDefaults.getUI() failed: no ComponentUI class for:
javax.swing.JButton[,0,0,0x0,invalid,layout=javax.swing.OverlayLayout,alignm
entX=null,alignmentY=null,border=,flags=0,maximumSize=,minimumSize=,preferre
dSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBor
der=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,ro
lloverSelectedIcon=,selectedIcon=,text=,defaultCapable=true]
java.lang.Error
 at javax.swing.UIDefaults.getUIError(UIDefaults.java:351)
 at javax.swing.UIDefaults.getUI(Compiled Code)
 at javax.swing.UIManager.getUI(Compiled Code)
 at javax.swing.JButton.updateUI(JButton.java:115)
 at javax.swing.AbstractButton.init(AbstractButton.java:1196)
 at javax.swing.JButton.<init>(JButton.java:105)
 at javax.swing.JButton.<init>(JButton.java:73)
 at JButton.Applet2.jbInit(Applet2.java:71)
 at JButton.Applet2.init(Applet2.java:59)
 at sun.applet.AppletPanel.run(Compiled Code)
 at java.lang.Thread.run(Compiled Code)
UIDefaults getUI for JButton=null


It's the same if I run it in a Browser IE5 with the JRE 1.3 plugin:
Java(TM) Plug-in: Version 1.3.0-C Using JRE version 1.3.0 Java HotSpot(TM)
Client VM
User home directory = C:\WINDOWS Proxy Configuration: no proxy  JAR cache
enabled.
L&F Class loaded OK =com.spiritone.gus.swing.ShadowLookAndFeel
Applet2 Setting Look & Feel:
UIManager L&F=Components with offset shadows
ButtonUI Class loaded OK =com.spiritone.gus.swing.ShadowButtonUI
Applet2 CodeBase=file:/C:/JBuilder3/myclasses/
About to create JButton
UIDefaults.getUI() failed: no ComponentUI class for:
javax.swing.JButton[,0,0,0x0,invalid,layout=javax.swing.OverlayLayout,alignm
entX=null,alignmentY=null,border=,flags=0,maximumSize=,minimumSize=,preferre
dSize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBor
der=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,ro
lloverSelectedIcon=,selectedIcon=,text=,defaultCapable=true]
java.lang.Error
at javax.swing.UIDefaults.getUIError(Unknown Source)
at javax.swing.UIDefaults.getUI(Unknown Source)
at javax.swing.UIManager.getUI(Unknown Source)
at javax.swing.JButton.updateUI(Unknown Source)
at javax.swing.AbstractButton.init(Unknown Source)
at javax.swing.JButton.<init>(Unknown Source)
at javax.swing.JButton.<init>(Unknown Source)
at JButton.Applet2.jbInit(Applet2.java:71)
at JButton.Applet2.init(Applet2.java:59)
at sun.applet.AppletPanel.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
 UIDefaults.getUI() failed: no ComponentUI class for:
javax.swing.JButton[,0,0,0x0,invalid,layout=javax.swing.OverlayLayout,alignm
entX=0.0,alignmentY=0.5,border=,flags=0,maximumSize=,minimumSize=,preferredS
ize=,defaultIcon=,disabledIcon=,disabledSelectedIcon=,margin=null,paintBorde
r=true,paintFocus=true,pressedIcon=,rolloverEnabled=false,rolloverIcon=,roll
overSelectedIcon=,selectedIcon=,text=Shadow JButton,defaultCapable=true]
java.lang.Error  at javax.swing.UIDefaults.getUIError(Unknown Source)  at
javax.swing.UIDefaults.getUI(Unknown Source)  at
JButton.Applet2.jbInit(Applet2.java:73)  at
JButton.Applet2.init(Applet2.java:59)  at sun.applet.AppletPanel.run(Unknown
Source)  at java.lang.Thread.run(Unknown Source)
UIDefaults getUI for JButton=null

It's the same if I try it in the main( ) method of an Application:

C:\JBUILDER3\java\bin\javaw.exe -classpath
"C:\JBuilder3\myclasses;C:\JBUILDER3\lib\dx3.0.jar;C:\JBUILDER3\lib\dx3.0-re
s.jar;C:\JBUILDER3\lib\jbcl3.0.jar;C:\JBUILDER3\lib\jbcl3.0-res.jar;C:\JBUIL
DER3\lib\jgl3.1.0.jar;C:\JBUILDER3\lib\dbswing3.0.jar;C:\JBUILDER3\lib\dbswi
ng3.0-res.jar;C:\JBUILDER3\java\lib\jdkdep.jar;C:\JBUILDER3\java\jre\lib\rt.
jar;C:\JBUILDER3\java\lib\dt.jar;C:\JBUILDER3\java\jre\lib\i18n.jar;C:\JBUIL
DER3\java\lib\tools.jar" JButton.Application2
AppAccelerator(tm) 1.2.010 for Java (JDK 1.2), x86 version.
Copyright (c) 1997-1999 Inprise Corporation. All Rights Reserved.
Loading LookAndFeel com.spiritone.gus.swing.ShadowLookAndFeel
LookAndFeel Unavailable:
java.lang.ClassNotFoundException: com/spiritone/gus/swing/ShadowLookAndFeel
 at java.lang.Class.forName0(Native Method)
 at java.lang.Class.forName(Class.java:124)
 at javax.swing.UIManager.setLookAndFeel(UIManager.java:365)
 at JButton.Application2.main(Application2.java:25)


Here's my custom LookAndFeel class, it's real simple :

package com.spiritone.gus.swing;

import javax.swing.UIDefaults;
import javax.swing.plaf.metal.MetalLookAndFeel;
import java.io.Serializable;

public class ShadowLookAndFeel extends MetalLookAndFeel implements
Serializable {

  protected void initClassDefaults(UIDefaults table)  {
    super.initClassDefaults(table);
    table.put ("ButtonUI", "com.spiritone.gus.swing.ShadowButtonUI");
  }

  public String getID() {
    return "Shadow";
  }
  public String getName() {
    return "Shadow L&F";
  }
  public String getDescription() {
    return "Components with offset shadows";
  }

  public boolean isNativeLookAndFeel() {
    return false;
  };

  public boolean isSupportedLookAndFeel() {
    return true;
  };

  public void initialize() {
  }
  public void uninitialize() {
  }
  public String toString() {
   return getName() + " : " + getClass().getName();
  }
}