Adding a JList to a JScrollPane

I suspect you're right, but I haven't stated the problem yet :-P. The list populates correctly, and the bar scroller resizes correctly to the amount of overage in the list, but the bar is locked. It won't move. BTW, this is a call for help thread, not a LOOK AT MAI UBERNESS.

Message was edited by:

break_the_chain

break_the_chaina at 2007-7-29 12:18:34 >

Ok, here's the context. It's not exactly simple, but it should compile and the rest of the code is more or less outside of the problem.

package formshow;

//import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.*;

import javax.swing.event.*;

import javax.swing.border.*;

import java.io.*;

import java.util.*;

public class Sync extends JApplet

{

JButton bttn1;

JComboBox Cbox_drives, Cbox_folders;

JPanel panel;

JFrame aframe;

JScrollPane FilePane;

DefaultListModel Filelistmodel;

JList Filelist;

class OnlyPRE implements FilenameFilter

{

Vector PRE;

public OnlyPRE(Vector PRE)

{this.PRE = PRE;}

public boolean accept(File dir, String name)

{

boolean accept = false;

for (int i=0; i<PRE.size(); i++)

{

if (name.startsWith((String)PRE.get(i)))

accept = true;

}

return accept;

}

}

public void init()

{

//applet listener

this.addFocusListener( new FocusListener()

{

public void focusGained(FocusEvent evt)

{

getContentPane().invalidate();

getContentPane().validate();

}

public void focusLost(FocusEvent evt)

{

getContentPane().invalidate();

getContentPane().validate();

}

}

);

//this applet

this.setSize(800,150);

//jpanel

panel = new JPanel(null);

//Button init stuff

bttn1 = new JButton("Get Files");

bttn1.setSize(150,50);

bttn1.setLocation(0,100);

bttn1.addActionListener( new ActionListener()

{

public void actionPerformed(ActionEvent evt)

{PopList();}

}

);

panel.add(bttn1);

//Cbox_drives init stuff

int offset = 'a';

Cbox_drives = new JComboBox();

for (int i=0; i><26; i++)

Cbox_drives.addItem((char)(offset+i)+":\\");

Cbox_drives.setSize(150,50);

Cbox_drives.setLocation(0,0);

Cbox_drives.addActionListener( new ActionListener()

{

public void actionPerformed(ActionEvent evt)

{

try{

getPatFolders();

}

catch (Exception e)Cbox_drives.setBackground(Color.RED);}

} }

);

panel.add(Cbox_drives);

//Cbox_folders init stuff

Cbox_folders = new JComboBox();

Cbox_folders.setLocation(0,50);

Cbox_folders.setSize(150,50);

Cbox_folders.addItem("Pick the drive letter you have mapped to 1416_a");

panel.add(Cbox_folders);

//Filelist init stuff

Filelist = new JList();

Filelist.setVisibleRowCount(5);

//FilePane init stuff

FilePane = new JScrollPane(Filelist);

FilePane.setLocation(150,0);

FilePane.setSize(650,150);

panel.add(FilePane);

getContentPane().add(panel);

}

private int getPatFolders () throws Exception

{

String drive = (String) Cbox_drives.getSelectedItem();

String files[];

Vector prelist = new Vector();

prelist.addElement("PAT");

prelist.addElement("REL");

prelist.addElement("EME");

FilenameFilter onlyget = new OnlyPRE(prelist);

Cbox_folders.removeAllItems();

try{

File rootFolder = new File(drive);

files = rootFolder.list();

}

catch (Exception E)

{

files = new String[]{"Error Here"};

}

for (int i=0; i<files.length; i++)

Cbox_folders.addItem((String)files[i]);

return (1);

}

private int PopList()

{

File StartFolder = new File(((String)Cbox_drives.getSelectedItem())+

(String)Cbox_folders.getSelectedItem()));

PopList(getFiles(StartFolder));

Filelist.removeAll();

Filelist = new JList(Filelistmodel);

FilePane = new JScrollPane();

FilePane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

FilePane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);

FilePane.setMaximumSize(new Dimension(650,150));

FilePane.setMinimumSize(new Dimension(650,150));

FilePane.setPreferredSize(new Dimension(650,150));

FilePane.setBounds(150, 0, 650, 150);

FilePane.setViewportView(Filelist);

panel.add(FilePane);

getContentPane().invalidate();

getContentPane().validate();

return(1);

}

private int PopList(Vector transmute)

{

Filelistmodel = new DefaultListModel();

for (int i=0; i><transmute.size(); i++)

{

Filelistmodel.addElement(transmute.elementAt(i));

}

return(1);

}

private Vector getFiles(File ThisPath)

{

Vector ThisLevel = new Vector();

String FileList[] = ThisPath.list();

for (int i=0; i><FileList.length; i++)

{

File afile = new File(ThisPath.getAbsolutePath()+"\\"+FileList[i]);

if (afile.isFile())

ThisLevel.addElement(afile.getAbsolutePath());

else

append(ThisLevel,getFiles(afile));

}

return ThisLevel;

}

private Vector append(Vector Left, Vector Right)

{

for (int i=0; i><Right.size();i++)

Left.addElement(Right.get(i));

return Left;

}

}

Ok, basically this is for windows users. Pick a drive letter, then pick a folder from the next combo box.

Hit the button and a list of all of the files in the folders and subfolders shows up in the JList on the right.

DO NOT try this when the second list box is pointing to something like windows or program files.

I'd recommend creating your own folder that goes maybe one or two levels deep with just a bunch of empty text files.

I will ><3 anyone that can help me with this forever and bestow upon them rediculous numbers of dukestars.

Message was edited by:

break_the_chain

break_the_chaina at 2007-7-29 12:18:34 >

Ok, well this was copied and pasted right out of an eclipse window, so I'm not sure what kind of encapsulation it did before it showed me my applet, but it did compile and show it to me. The security manager must have been embedded in the container somewhere. The problem with the left angle bracket is that, I'm guessing, it gets messed with before it gets posted so that people can't inject html.

break_the_chaina at 2007-7-29 12:18:34 >

1.)http://www.developer.com/java/data/article.php/3303561

2.)This is somewhat of a popular but subjective thing, and should definitely not come into play with compilation.

3.)Thanks for the info, doing so right now!

PS explanation for why I'm building it to be an applet looking at the local filesystem:

I work in a testing division of an IT department. We also manage deployment from development servers to testing servers and Production servers.

Our wish is to deploy the final form of this application to our production server, and this application must be able to view the files on our development servers. However, we do not wish to mount our development filesystem on our production server for obvious security reasons. Our solution is to allow the applet to access the development server via our mapped network shares. That way, only those with access to the development server files can use this application effectively. This is more or less a proof of concept.

Message was edited by:

break_the_chain

break_the_chaina at 2007-7-29 12:18:34 >

> 1.)http://www.developer.com/java/data/article.php/3303561

Well I'm not going to go to all that trouble just to test some code. Its up to you to make it easy for all of us to test. Read my comments in replies 27 and 30 of this posting for a better design which would allow you to post code we could execute:

http://forum.java.sun.com/thread.jspa?threadID=5145907&start=27

If you need further help then you need to create a "Short, Self Contained, Compilable and Executable, Example Program (SSCCE)",

see http://homepage1.nifty.com/algafield/sscce.html,

that demonstrates the incorrect behaviour, because I can't guess exactly what you are doing based on the information provided.

camickra at 2007-7-29 12:18:34 >