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.
Related
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.
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 generated a decision tree based on a set of data, then I converted this data to a xml file, after that I put it into a JTree. This part works fine but now I have to take a new instance(which contains the data received from the user), find it's place in the decision tree and change that node's color. And I can't find a way to do that. I am using weka and the J48 classifier to generate the decision tree. The xml is created in the Luc Sorel style: http://www.lucsorel.com/media/downloads/sample_decision_tree.xml
The first thing I tried was to classify the instance using the algorithm but that gets me only the class where it belongs, and I don't know how to locate it in the JTree.
What should I do? Any ideeas?
Like JTable, JTree uses a flyweight renderer to draw nodes. As the default renderer is a JLabel, you can set the foreground color or make the label opaque and set the background color. This related example changes the icon for emphasis. More examples may be found here.
Addendum: I cannot find … the node that I should color.
When getTreeCellRendererComponent() is called, value is a reference to the node to be rendered, and the tree parameter allows access to the TreeModel as a whole via getModel(). This example shows how to search a tree.
I would like to add drag and drop feature to my JTree.
I have tried to run example from this thread. It works but it works only on last leaves in tree, not on nodes that contain some childs. I have also looked on this thread.
I have defined canImport and importData methods, and also have set setDragEnabled(true). I just cannot drag nodes also with its childs.
How to edit example from first link to drag also nodes with its childs? As I understand correctly, I should set DataFormat instance, to set what types should be dragged.
Can anybody help?
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.