Smart and Fast Tree

[Kriss Reddy]

Hi,

I would like to create a tree which would load as shown below:

C:\
------>Folder-1
------>Folder-2
------>Folder-3

When Folder-1 is selected I want to display as shown below:
C:\
------>Folder-1
|----------->Folder-1.1
|----------->Folder-1.2
|----------->File1.1

and when Folder-1.1 is selected, I want to display as shown below:

C:\
------>Folder-1
|-------->Folder-1.1
|-------->Folder-1.1.1
|-------->File-1.1.1

and I do not want to load children in any other folders other than selected because it takes a lot of time to load the tree.

Please let me know the approach that I should take to implement this functionality.

Thanks in advance.
Kriss

[Maneesh Godbole]

In the other thread which you had hijacked Rob gave some tips on how do lazy load a tree with caching. Did you try it out?
What have you got so far, and were exactly are you stuck?

[Kriss Reddy]

Hi,
I do not know how to lazy load and cache. Please help.

Thanks.

[Paul Clapham]

I went to the API documentation for JTree and started searching for the word "listener". Pretty soon I came to a method called "addTreeExpansionListener" whose short description says

Adds a listener for TreeExpansion events.

[Kriss Reddy]

Hi Paul,

Thanks for your pointer, I noticed that. How does a JTree load its children by default? ie what is the default way of loading its children, what conditions determine this behaviour?

Please point to some easy to understand 'basics' tutorial of JTree, some sun's tutorials are too complicated for me.

Thanks.
Kriss