For my application I want t bild a JTree that list the files in the directory the the file open.
I would like it to be able to perform simpole operations on them- e.g. Rename, delete
I would like the directories to expand like in a normal tree also...
Is this possible? If so, how would I go about doing it
Thanks in Advance- Alex
That doesnt help, it keeps getting a red line.
I must be putting it in the wrong place or something
item = new JMenuItem("Delete File") ;
item.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
deleteFile() ;
}
}) ;
and under delete file is the remove node thiing
Red line in eclipse saying its incorrect or smething, what I want to do is have a delete file function(in my JTree) which I've built, however it doesnt remove the node when the file's deleted, it just stays there and does nothing, I'd like the node to dissappear
EDIT: Thanks for that link, I probaboly wont be using the file browser code, however the rest *should* be helpful
Message was edited by:
Glynnder
> Red line in eclipse saying its incorrect or smething,
> what I want to do is have a delete file function(in
> my JTree) which I've built, however it doesnt remove
> the node when the file's deleted, it just stays there
> and does nothing, I'd like the node to dissappear
When you say red line and thing. I am having to guess what the real error is and real code is.
Please hold your mouse over the "red-line" to see what the error is. Or compile it by hand.
Also, it would be much more useful for you to post the code instead of saying "thing".
I posted the code above, I'll do it again though.
item = new JMenuItem("Delete File") ;
item.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
deleteFile() ;
}
}) ;
popup.add(item) ;
If it helps its a right click menu
The error is because I dont know what code to use...
> I posted the code above, I'll do it again though.
You did but then you said: "and under delete file is the remove node thiing"
I am assuming "remove node thing" means code. Where is this code? What does the deleteFile() do?
> The error is because I dont know what code to use...
I thought you said Eclipse was telling you there was a compile error by underlining code in red. Is that true or not?
I would like to help but you are not being very clear.
http://catb.org/esr/faqs/smart-questions.html
OK, I'll be as clear as possible:
In my project I have a JTree that lists file in a directory, if the user right clicks a menu pops up, one of the options is "delete". This is the code for the delete option:
item = new JMenuItem("Delete File") ;
item.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e)
{
deleteFile() ;
}
}) ;
popup.add(item) ;
This is the code for deleteFile()
public void deleteFile(){
DefaultMutableTreeNode node = (DefaultMutableTreeNode)
tree.getLastSelectedPathComponent();
final String filepath = getSelectedFilepath(node) ;
System.out.println("Deleting: "+filepath);
new File(filepath).delete();
Main.log.append("Deleted!\n" + filepath);
}
What is happening is that, although the file deletes, the item in the JTree doesn't dissappear, I am wondering what the code is to make the node that the file it refers to has been deleted dissappear also.
By the remove node thing was the code I had tried:
tree.removeCurrentNode();
however that was underlined in red by Eclipse and wouldnt compile.
What is the correct code to remove the node?
> By the remove node thing was the code I had tried:
> tree.removeCurrentNode();
> however that was underlined in red by Eclipse and
> wouldnt compile.
>
> What is the correct code to remove the node?
There is no method on the JTree called remvoeCurrentNode()
The API is very useful. It would be to your advantage to learn how to navigate it quickly (it will save you time in the future).
Also the sun tutorial is very useful and some information about changing a tree in a section here:
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html
You are going to need to remove the node out of the tree, probably by calling a method on a MutableTreeNode. See here:
http://java.sun.com/javase/6/docs/api/javax/swing/tree/MutableTreeNode.html
> I've looked at that and have no idea how to implement
> it....
Did you look at the MutableTreeNode link I posted? There were some remove methods.
Edit:
Also, another possible option is to reload the entire tree instead of trying to change the tree each time.
In most cases this is going to require a lot less code. It will also allow the tree to display the most current information.
> yeah, how woul i do that?
> (or would i just do the code for it again)
It not a good idea to repeat code. Instead create a method or class that will build the tree for you.
After you add, delete files, etc. call this method to rebuild the tree. Rather than creating an entire JTree component. You should just be able to create a new data model:
http://java.sun.com/docs/books/tutorial/uiswing/components/tree.html#data