It would be very useful to expand a JFace tree viewer in java swt as follows:
whenever a new node is added to the tree, the tree viewer expands only the currently added node in the tree (and its children if any).
I have used the expandToLevel(getIndex()) method, but this does not expands the children of the currently added node if any.
Thank you in advance for any hints and for your interest.
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I've the following problem: I created a tree viewer and bind a data model. The tree is comlete collapsed.
Now I want to select a specific node in the tree:
treeViewer.setSelection(new StructuredSelection(person), true);
Person is one of my custom objects in the data model. The node will be found and selected if the tree is expanded.
Because the node is a child of another node (3. level), nothing happens if the tree is collapsed.
Is it possible to select/focus the node, expand the parent items etc.?
I know I can recursively walk over all nodes and try to find the correct one but is there a method which do this work for me? Or maybe there's a different call of setSelection which let's me expand the tree path?
You can use TreeSelection for this. This takes aTreePath as an argument - which lists all the nodes in the path.
TreePath path = new TreePath(... array of nodes from root to person ...);
treeViewer.setSelection(new TreeSelection(path), true);
anyone help me i have Jtree and Subnode i want to click sub node and display one window form in java am using netbeans.
You can achieve this by using a tree selection listener. Look at How to Use Trees tutorial. In particular, Responding to Node Selection section describes how to implement a basic selection listener.
I have a custom checkbox node tree .
The structure is like this .
You can notice that the subtree is drawn from the check box node tree.
And what i need is ,
The sub tree must be drawn under the folder icon and not the check box.
Please guide me on this regard .
You are using a custom TreeCellRenderer? Just indent it, i.e. add padding to the left which has the width of the folder icon. If you are not using a custom TreeCellRenderer: That is the way to go.
Add One as a leaf (like Two and Three). The tree does not make sense otherwise.
Actually I'm interested to create an inverted JTree in Java in such a way that root exists at top and its child nodes at the next level and so on. As we know in case of simple JTree the child nodes appears expanding on the right side of the parent node but I want to implement inverted JTree in my project where child nodes expands downwards which gives an appearance of "TREE" type of data structure.
As this is very essential for my project so can anyone suggest me the code for the above mentioned problem?
Thanks in advance.
Then JTree is not the correct choice. Perhaps, you should look into Java2D and stuff like that.
I have a tree and a TreePath to one of its nodes. How do I programatically select this node?
Will setSelectionPath of the JTree object alone work?
Yes. From the Java Documentation
If any component of the path is hidden
(under a collapsed node), and
getExpandsSelectedPaths is true it is
exposed (made viewable).