Thorsten Scherler wrote:
El mar, 20-09-2005 a las 17:38 +0200, Sylvain Wallez escribió:
Thorsten Scherler wrote:
That is working fine. :) Very good stuff.
Any hints how I can implement the binding?
The tree widget currently doesn't have child widgets, so binding it
doesn't really make sense.
It does not provide child widgets in the cforms definition but IMO each
node of the tree is an option. The file explorer example shows that
quite nice. You can select nodes and the selected nodes are stored in
the message, right?
The tree widget keeps the paths of selected nodes, but not the nodes
themselves, to avoid keeping hard references on the tree model. You can
access the selection using tree.getSelectionPath (single selection) or
tree.getSelectionPaths (multiple selection).
From a TreePath, you can then access the actual tree node using
tree.getModel().getNode(path).
Now one way to have a binding example is to not use the message wigdet
but another widget where we store the selected option. Please have a
look at http://pastebin.com/370003.
Didn't knew pastebin. Cool!
From there I would like to change the filesOption.setValue(...) in:
...
} else {
messages.setValue(count + " files selected");
filesOption.setValue(count + " files selected");
}
to an array that is storing the "files.selectionPath" for all selected
files. From there we can extracted it in the binding again. Does that
makes sense?
You actually don't need to update the array in the event listener. Just
use tree.getSelectionPaths() to get the full selection when you need to
perform your binding.
I am still looking into a way how to get the selection to an array. Can
you point me to information about getting the event.source.selection
into an array?
What about:
TreePath[] paths = tree.getSelectionPaths();
Object[] objs = new Object[paths.length];
for (int i = 0; i < paths.length; i++) {
objs[i] = tree.getModel().getNode(paths[i]);
}
What you should take a lot at though, is the TreeModel which is what
should be provided by the application to fill the tree.
I looked at the $Sample and actually I am planning to use it in lenya to
read in the sitetree.xml of a publication. I reckon I just need some
small modifications.
Great! This tree widget is very new, and just awaits users to express
their needs!
Sylvain
--
Sylvain Wallez Anyware Technologies
http://people.apache.org/~sylvain http://www.anyware-tech.com
Apache Software Foundation Member Research & Technology Director
