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Re: JTree forcing node to

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  To: comp.lang.java.gui
Dennis Groenendijk wrote:
>> I've got a JTree and I've extended AbstractTreeNode creating 3
>> different types of nodes. One of my subclasses is a Directory node. In
>> JTree when a node has children it automatically sets the icon of that
>> node to look something like a folder. However, if the node doesn't
>> have children then it looks like a leaf node.
>>
>> Is there a simple solution to force a node to have the directory icon?
>> I assume I have to set the cell renderer, but I'm hoping I don't have
>> to create the renderer myself.
> 
> The simplest solution I can think of is doing this:
> 
> public class MyTreeCellRenderer extends DefaultTreeCellRenderer {
> 
> public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, 
>   boolean expanded, boolean leaf, int row, boolean hasFocus) {
> 
>  if (leaf && tree.getPathForRow(row).getLastPathComponent() instanceof DirectoryNode) { 
>     //or some other way you detect the difference between your nodes
>     setLeafIcon(getClosedIcon());
>   }    
>   return super.getTreeCellRendererComponent(tree, value, sel, expanded, leaf,
>         row, hasFocus);
> }
> }
> 
> you do have to set 
> tree.setCellRenderer(new MyTreeCellRenderer());
> on your tree.
> 
> Hope this helps.
> 
> Dennis.
> 
> This message was written with a newsreader I am writing in Java. So if there is something wrong
> with the message my apologies to the poster and more testing for me before release.


I'd be interested in testing your newsreader if you are allowing outside 
  testers access to the program. I'd use it in Windows XP but since it 
is written in Java that shouldn't be a problem. Can it handle binary 
attachments yet?

Brandon

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JTree forcing node to hav lionelv@gmail.com.remove-dii-this - 2011-04-27 15:38 +0000
  Re: JTree forcing node to "Dennis Groenendijk" <dennis.groenendijk@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000
    Re: JTree forcing node to "Brandon McCombs" <brandon.mccombs@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000
      Re: JTree forcing node to "Dennis Groenendijk" <dennis.groenendijk@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000
        Re: JTree forcing node to "Lew" <lew@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000
          Open source licenses Was: "Dennis Groenendijk" <dennis.groenendijk@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000
  Re: JTree forcing node to lionelv@gmail.com.remove-dii-this - 2011-04-27 15:38 +0000
  Re: JTree forcing node to "bcd" <bcd@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000
  Re: JTree forcing node to "Rogan Dawes" <rogan.dawes@THRWHITE.remove-dii-this> - 2011-04-27 15:38 +0000

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