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A JTree with JProgressBar's for its nodes

Paul Statham
Ranch Hand

Joined: Dec 05, 2008
Posts: 55
Hi Folks,

GUI code is not my forte as you'll probably be able to tell, essentially I want to have what I've described in the title. I came across this stackoverflow answer http://stackoverflow.com/questions/7036036/adding-multiple-jprogressbar-to-tablecolumn-of-jtable/7036206#7036206 which is specific to a JTable.

I have butchered this and spent quite some time trying to do essentially the same thing but with a JTree instead. The problem I have is the progress bars do not automatically refresh as they do the JTable example I found, instead they only refresh when they are clicked on, for the life of me I can't work out why? Also the second problem I have is that when I first expand my JTree, the expand icon disappears! Here's the code

Paul Clapham
Bartender

Joined: Oct 14, 2005
Posts: 18993
    
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I didn't read most of your code, but what has to happen is this: when a JProgressBar changes, it has to tell the model that it changed so that listeners to the model (i.e. the JTree) can react accordingly (i.e. redraw the node). If your tree model extends DefaultTreeModel, which apparently it does, that would require you to call "model.nodeChanged(treeNode)" where "treeNode" is the TreeNode object which contains that JProgressBar.
Paul Statham
Ranch Hand

Joined: Dec 05, 2008
Posts: 55
Paul Clapham wrote:I didn't read most of your code, but what has to happen is this: when a JProgressBar changes, it has to tell the model that it changed so that listeners to the model (i.e. the JTree) can react accordingly (i.e. redraw the node). If your tree model extends DefaultTreeModel, which apparently it does, that would require you to call "model.nodeChanged(treeNode)" where "treeNode" is the TreeNode object which contains that JProgressBar.


Perfect thank you, I'm glad it was something simple!
m Korbel
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Joined: Jun 19, 2012
Posts: 157
Perfect thank you, I'm glad it was something simple!


- this notifier missing in JTree/DefaultTreeModel API

- you have to notify programatically by myTreeModel.nodeChanged()
 
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