JTree DefaultMutableTreeNode Coloring
hi
i am facing a problem.I want to create root node with different color anf font and its child node with different color and font.When I change the color of my tree the whole tree nodes are given the same color.Is there any way in which i can color different nodes in the tree with different colors and font?
hello here is some comdesnippet howto create you're own
class MyRenderer extends JLabel implements TreeCellRenderer
ImageIcon rootIcon ;
ImageIcon dirIcon;
Font font10 = new Font("Helvetica", Font.PLAIN ,10);
public MyRenderer(ResourceBundle i)
rootIcon = new ImageIcon(images.getString("EXPLORER"));
dirIcon = new ImageIcon(images.getString("PROJECT16"));
setOpaque(false);
setBackground(null);
public Component getTreeCellRendererComponent(JTree tree,
Object value,
boolean sel,
boolean expanded,
boolean leaf,
int row,
boolean hasFocus)
// setFont(tree.getFont());
setEnabled(tree.isEnabled());
if( isEnabled(value))
if (sel){
// this.setForeground(new Color(57,90,70));
this.setForeground(new Color(255,0,0));
this.setBackground(new Color(255,2,0));
else
this.setForeground(new java.awt.Color(16, 49, 74));
else
this.setForeground(Color.red);
setFont(font10);
setText(tree.convertValueToText(value, sel, expanded, leaf, row, hasFocus));
if (value != null)
if (leaf)
greetings Sven
Similar Messages
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hello,
iam trying to set the backgroung color of my tree, i tried using tree.setBackground(Color.gray) but it did not work, i checked out the documentation but it did not specify how to do that, please can someone help?
asrarah i finally got the solution, thanx ttarola for the renderer tip coz that did the trick, here is how i did it:
DefaultMutableTreeNode top = new DefaultMutableTreeNode("Links");
DefaultTreeCellRenderer linksRenderer = new DefaultTreeCellRenderer();
createNodes(top);
links = new JTree(top);
links.putClientProperty("JTree.lineStyle", "Angled");
linksRenderer.setBackgroundNonSelectionColor(Color.gray);//this did the trick
linksRenderer.setBackgroundSelectionColor(Color.gray);
linksRenderer.setLeafIcon(new ImageIcon("middle.gif"));
links.setCellRenderer(linksRenderer);
linkScroller = new JScrollPane(links);thanx guys for the suggestions and help.
asrar -
JTree Node Color, to distinguish between different activities
Hi,
Situation: Dynamic JTree (Tree is constructed from as a result of Database). User has the option to either Enable / Disable node and can repeat the activities but restricted only one activity per node, the node is to be highlighted; to restrict the user from further activities.
Problem: Am a newbie to swing, after searching the forum for the same, i found few good solutions which are specific to color change of specific selected node, in a temporary context.
But we need the node color change within a same level; to distinguish either the node is either enabled / disabled.
Your help is appreciated,durino13 wrote:
1. Is the approach above a good approach, how to load children 'lazilly'?Sounds pretty reasonable to me.
2. I also use custom renderer to display different icons for every "tree" level. When I initially expand the 4th level, everything works fine !!! Then I collapse the 4th level and expand it again and here my problem starts: my 4th level icon is set to 'root level icon' instead of '4th level' icon. This does not happen, if computerNode.removeAllChildren(); method is removed from listening above
Any idea, what am i doing wrong?Ummmm... Load the model the first time (only) the node is expanded... Putz!
And I suggest you listen deeply to Mr Jacobs... He really does know what he's talking about ;-)
... and not this time, but in future: Swing questions are best asked in [THE Swing Forum|http://forums.sun.com/forum.jspa?forumID=57].
Cheers. Keith. -
Hi all
I have a small (?) problem changing the background color of a jtree object.
I change the background color to black with setBackground method but the objects in it remains white. I want them to be in black background color, too. and I couldn't find a solution. How can I do that?
thanksI have a small (?) problem changing the background
color of a jtree object.Do you mean the instance of JTree, or one of its nodes?
Just a few guesses - the Swing experts are in the Swing forum:
- maybe the tree background is transparent and you actually see the background of the pane it's on. Did you set the JTree to be opaque?
- did you think about custom renderers? -
JTree background color. How to...?
I have set the background color of Jtree to pink and have used setOpaque(true). Now when ever I click on a node the node's color is not changing to the default blue color. How to change it?
I have set the background color of Jtree to pink and have used setOpaque(true). Now when ever I click on a node the node's color is not changing to the default blue color. How to change it?
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Hi,
I set the background of a JTree to orange color by:
jTree1.setBackground(Color.orange);
However, the space around text is still in white color. Can anyone tell me how to change it too? Thanks.Hi, you could try -
((JComponent)
yourTree.getCellRenderer()).setOpaque(false);
I've not actually tested this, I'm just in the process
of figuring out the details of using trees.
colinThanks. It works with "yourTree.getCellRenderer()).setOpaque(true);" -
JTREE - DefaultMutableTreeNode
How to cast from DefaultMutableTreeNode to INTEGER?
I set :
DefaultMutableTreeNode node = new DefaultMutableTreeNode(rs.getInt("task_id"));then in the renderer I want to take this id as INTEGER, but I get error:
java.lang.ClassCastException: javax.swing.tree.DefaultMutableTreeNode
this line in the renderer with error:
Integer id = (Integer) value;Where? In the renderer??
I want to add in the renderer enother text (to the JLable) where is the id value.
Do you have an example?
Thanks :) -
Hello,
When changing LAFs, I can't seem to get a JTree in my app to follow when it comes to the selected item. No matter what LAF I use, the selected item color is always the light blue that is part of the metal theme. Here is a screenshot to demonstrate what I mean:
http://synic.ath.cx/help.png
See how the JList selection color (on the right) is different from the JTree selection color (on the left) ? I am using a custom renderer for both, and am using setBackround , setForeground in both, but I can never seem to get the JTree to change.
Any suggestions?
Adamcan you post some code? or an example or something?
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How to change JTree nodes background?
hello there
i have a jtree which i set its background to red
but the nodes background is still white
why?and how to set the nodes background to red too?
and how to remove the tree border
because i tried setting it to null and it doesn't work?
here is my code:
package view;
import java.awt.Color;
import javax.swing.*;
import javax.swing.tree.*;
class TreeComponent{
public static void main(String[] args) {
JFrame frame = new JFrame("Creating a JTree Component!");
DefaultMutableTreeNode parent = new DefaultMutableTreeNode("Color", true);
DefaultMutableTreeNode black = new DefaultMutableTreeNode("Black");
DefaultMutableTreeNode blue = new DefaultMutableTreeNode("Blue");
DefaultMutableTreeNode nBlue = new DefaultMutableTreeNode("Navy Blue");
DefaultMutableTreeNode dBlue = new DefaultMutableTreeNode("Dark Blue");
DefaultMutableTreeNode green = new DefaultMutableTreeNode("Green");
DefaultMutableTreeNode white = new DefaultMutableTreeNode("White");
parent.add(black);
parent.add(blue);
blue.add(nBlue);
blue.add(dBlue);
parent.add(green );
parent.add(white);
JTree tree = new JTree(parent);
tree.setBackground(Color.red);
tree.setBorder(null);
frame.add(tree);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setUndecorated(true);
frame.getRootPane().setWindowDecorationStyle(JRootPane.PLAIN_DIALOG);
frame.setSize(200,200);
frame.setVisible(true);
}how to set the nodes background to red too?
((JComponent) tree.getCellRenderer()).setOpaque(true);[/code\
how to remove the tree borderWhat border?
db -
JTree - Fetch URL from a tree node.
Now I have created one JTree and one JEditorPane.
Basically I am creating a help file. (a chm file in windows).
So I need to handle mouse click event on each node on JTree.
I have used such format to add a hyperlink.
sample code:---------------------------------------------------------------------------------------------------------------------------
javax.swing.tree.DefaultMutableTreeNode treeNode1 = new javax.swing.tree.DefaultMutableTreeNode("JTree");
javax.swing.tree.DefaultMutableTreeNode treeNode2 = new javax.swing.tree.DefaultMutableTreeNode("colors");
javax.swing.tree.DefaultMutableTreeNode treeNode3 = new javax.swing.tree.DefaultMutableTreeNode("blue");
treeNode2.add(treeNode3);
treeNode3 = new javax.swing.tree.DefaultMutableTreeNode("violet");
treeNode2.add(treeNode3);
treeNode3 = new javax.swing.tree.DefaultMutableTreeNode("red");
treeNode2.add(treeNode3);
treeNode3 = new javax.swing.tree.DefaultMutableTreeNode("yellow");
treeNode2.add(treeNode3);
treeNode1.add(treeNode2);
treeNode2 = new javax.swing.tree.DefaultMutableTreeNode("s");
treeNode3 = new javax.swing.tree.DefaultMutableTreeNode("<html><a href='C:\\Program Files\\Java\\jdk1.6\\README.html'>Read Me</a></html>");
treeNode2.add(treeNode3);
jTree1.setModel(new javax.swing.tree.DefaultTreeModel(treeNode1));
jTree1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent evt) {
TreeListener(evt);
private void TreeListener(java.awt.event.MouseEvent evt) {
int selRow= jTree1.getRowForLocation(evt.getX(), evt.getY());
TreePath tp = jTree1.getPathForLocation(evt.getX(), evt.getY());
if(selRow!=-1) {
if(evt.getClickCount()==1) {
jTree1.setSelectionPath(tp);
Now there is a hyperlink created for that node "Read Me".
My Question is ..........
How do I fetch this stored URL in each node for setting it to my JEditorPane....???ok, it seems to be working now. I just return the JInternalFrame in the getTreeCellRendererComponent() method.
-
Jtree Select node and change leafs icon problem
Hi All,
i create a tree and implement a TreeSelectionListener:
my mission is whenever i select a node i need to change the icon of this node (for now.later i will have to find if it have childrens).
import java.awt.Color;
import java.awt.Component;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import java.util.Vector;
import javax.swing.ImageIcon;
import javax.swing.JTree;
import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import javax.swing.event.TreeSelectionEvent;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
import javax.swing.tree.TreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreePath;
public class TreeView{
DefaultMutableTreeNode top;
JTree tree ;
Color frameColor;
public static ImageIcon NoTSelIcon;
public static ImageIcon SelIcon;
public static String[] name= new String[8];
public TreeView(Color BackColor) {
// TODO Auto-generated constructor stub
top = new DefaultMutableTreeNode("Diagnostics");
this.frameColor=BackColor;
SelIcon = createImageIcon("../Resource/Images/Select.gif");
if (SelIcon == null)
System.err.println("Tutorial icon missing; using default.");
NoTSelIcon = createImageIcon("../Resource/Images/NotSelc.gif");
if (NoTSelIcon == null)
System.err.println("Tutorial icon missing; using default.");
public Component createTreeComponents(){
//Create the nodes.
createNodes(top);
//Create a tree that allows one selection at a time.
tree = new JTree(top);
//TREE LISTENERS
//Treeselction listener
Handler hObject = new Handler();
tree.addTreeSelectionListener(hObject);
//Tree expand/collapse listener
HandlerExpansionListener hObjectExpan = new HandlerExpansionListener();
tree.addTreeExpansionListener(hObjectExpan);
// tree.getSelectionModel().setSelectionMode(TreeSelectionModel.DISCONTIGUOUS_TREE_SELECTION);
//set tree background
tree.setBackground(frameColor);
tree.setCellRenderer(new OverrideTreeCellRenderer(frameColor,SelIcon,NoTSelIcon));
return tree;
private void createNodes(DefaultMutableTreeNode top) {
DefaultMutableTreeNode category = null;
DefaultMutableTreeNode SubCategory = null;
DefaultMutableTreeNode SubCategoryBasee = null;
DefaultMutableTreeNode SubSubCategoryBasee = null;
category = new DefaultMutableTreeNode("Dfe");
top.add(category);
//Sub test visible
SubCategory = new DefaultMutableTreeNode("Test Visible");
category.add(SubCategory);
SubCategory.add(new DefaultMutableTreeNode("Son 1"));
SubCategory.add(new DefaultMutableTreeNode("Son 2"));
SubSubCategoryBasee = new DefaultMutableTreeNode("Test Base");
SubSubCategoryBasee.add(new DefaultMutableTreeNode("Grandson 1"));
SubSubCategoryBasee.add(new DefaultMutableTreeNode("Grandson 2"));
SubCategory.add(SubSubCategoryBasee);
class Handler implements TreeSelectionListener {
public void valueChanged(TreeSelectionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("treeSelect event ");
TreePath trph;
trph=arg0.getNewLeadSelectionPath();
int count=trph.getPathCount();
DefaultMutableTreeNode Selnode = (DefaultMutableTreeNode)tree.getLastSelectedPathComponent();
String Name = (String)Selnode.getUserObject();
setSelected(Selnode,true);
int number_ofnodes=getNodeCountBelow((TreeModel)tree.getModel() , Selnode, false);
System.out.println("The Number of nodes under "+Name+"="+number_ofnodes);
tree.setCellRenderer(new IconRenderer(SelIcon,NoTSelIcon,frameColor));
class HandlerExpansionListener implements TreeExpansionListener {
public void valueChanged(TreeSelectionEvent arg0) {
// TODO Auto-generated method stub
DefaultMutableTreeNode node = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if (node == null) return;
} // The inner class
public void treeCollapsed(TreeExpansionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("treeCollapsed event ");
public void treeExpanded(TreeExpansionEvent arg0) {
// TODO Auto-generated method stub
System.out.println("treeExpanded event ");
/** Returns an ImageIcon, or null if the path was invalid. */
protected static ImageIcon createImageIcon(String path) {
//ImageIcon imcon= new ImageIcon(path);
//return imcon;
java.net.URL imgURL = TreeView.class.getResource(path);
if (imgURL != null) {
return new ImageIcon(imgURL);
} else {
System.err.println("Couldn't find file: " + path);
return null;
DefaultMutableTreeNode newnode;
public void setSelected(DefaultMutableTreeNode Selnode ,boolean isSelected)
Enumeration Enchilds=Selnode.children();//ENUMRATE ALL CHILDS FOR THIS NODE
if (Enchilds != null)
while (Enchilds.hasMoreElements())
newnode=(DefaultMutableTreeNode)Enchilds.nextElement();
String NameSel = (String)newnode.getUserObject();
setSelected(newnode,isSelected);
//GETTING THE TREE DEPTH
public int getNodeCountBelow(TreeModel model, Object node, boolean includeInitialNode)
int n = includeInitialNode ? 1 : 0;
for (int i = 0; i < model.getChildCount(node); i ++)
n += getNodeCountBelow(model, model.getChild(node, i), true);
return n;
import java.awt.Color;
import java.awt.Component;
import java.util.Enumeration;
import java.util.NoSuchElementException;
import javax.swing.Icon;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeCellRenderer;
public class IconRenderer extends DefaultTreeCellRenderer {
private static final long serialVersionUID = 1L;
Icon SelectedIcon;
Icon NotSelectedIcon;
Color BackgroundColor;
boolean Selected=false;
boolean Leaf=false;
boolean IsItaChild=false;
DefaultMutableTreeNode SelctedNode=null;
public IconRenderer(Icon SelIcon,Icon NoTSelIcon,Color Bacground) {
SelectedIcon = SelIcon;
NotSelectedIcon = NoTSelIcon;
BackgroundColor=Bacground;
setBackgroundNonSelectionColor(BackgroundColor);
public Component getTreeCellRendererComponent(JTree tree,Object value,boolean sel,boolean expanded,
boolean leaf,int row,boolean hasFocus)
super.getTreeCellRendererComponent(tree, value, sel,expanded, leaf, row,hasFocus);
Selected=sel;
Leaf=leaf;
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
String s2 = (String)node.getUserObject();
return this;
}my problem is :
when i select a node the the method "getTreeCellRendererComponent"
start to run on the entire tree from buttom to top and than from top to buttom.
for me it waste of time because if has say 100 nodes it wont botthers me.
but i have 20000 nodes and more its take a time.
and for all this nodes i have to make compares.
is there a way to force the DefaultTreeCellRenderer to not run the entire tree???
ThanksYou need to make sure that your TreeModel interprets your group nodes to be non-leaf nodes (one of the methods in the TreeModel interface is called isLeaf). If you are using a DefaultTreeModel with DefaultMutableTreeNode objects, you can use the askAllowsChildren property of DefaultTreeModel and the allowsChildren property of DefaultMutableTreeNode to control this. See the API for more details:
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/tree/DefaultTreeModel.html
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/tree/DefaultMutableTreeNode.html -
Hi guys,
I am currently working a project which required me to implement three different hierarchy structure and use combobox to choose between them. I am able to construct three trees and able to display individual correctly. But I have difficulty to refresh the hierachy tree by choose another combobox choice. I would be appreciated if some one can give me a simple examples to show how do I do it.
i.e. I had three combobox color, sport and food. also three corresponding hierachy, at each time only one hierarchy can be displayed by choosing one of the combobox.
Thanks very much/* declaration of JTree */
DefaultMutableTreeNode myTreeTopNode = new DefaultMutableTreeNode("Root");
DefaultTreeModel myTreeModel = new DefaultTreeModel(myTreeTopNode);
JTree myTree = new JTree(myTreeModel);
//do your change on tree
/* reload the tree */
myTreeModel.reload();Bye
Monica -
Any component as leaf for JTree problems
hi,
I'm trying to get arbitary components as leaves in a JTree and it looks like its very nearly there, but there are two (related?) problems.
1) If you click around on the top 3 tree components then it gets stuck in a loop of rendering and causes a stack exception to be thrown.
2) For the embedded JTree component, expanding its nodes doesn't update the parent tree
both may be because current the row height is set at the wrong time (in the TreeCellRenderer)
any help would be really appreciated!
thanks,
asjf
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.*;
import java.util.*;
public class ComponentTree
public static void main(String args[])
try{(new UIManager()).setLookAndFeel((new UIManager()).getSystemLookAndFeelClassName());}
catch(Exception e){}
DefaultMutableTreeNode c0 = new DefaultMutableTreeNode(new JButton("root"));
DefaultMutableTreeNode c1 = new DefaultMutableTreeNode(new JButton("c1"));
DefaultMutableTreeNode c2 = new DefaultMutableTreeNode(new JList(new Object [] {"A","B","C"}));
DefaultMutableTreeNode c3 = new DefaultMutableTreeNode(new JTable(new Object [][] {{"Active","true"},{"User","root"}}, new Object [] {"Name","Value"}));
DefaultMutableTreeNode c4 = new DefaultMutableTreeNode(new JTree());
DefaultMutableTreeNode c5 = new DefaultMutableTreeNode(new JList(new Object [] {"D","E","F"}));
DefaultMutableTreeNode c6 = new DefaultMutableTreeNode(new JCheckBox("Active",true));
DefaultTreeModel dtm = new DefaultTreeModel(c0);
dtm.insertNodeInto(c6,c0,0);
dtm.insertNodeInto(c1,c0,0);
dtm.insertNodeInto(c2,c0,0);
dtm.insertNodeInto(c5,c2,0);
dtm.insertNodeInto(c3,c1,0);
dtm.insertNodeInto(c4,c3,0);
JTree tree = new JTree(dtm);
tree.setEditable(true);
tree.setCellRenderer(new DefaultTreeCellRenderer()
public Component getTreeCellRendererComponent( JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row, boolean hasFocus)
System.out.println("Render row "+row);
Component c = (Component) ((DefaultMutableTreeNode) value).getUserObject();
if(c instanceof JCheckBox)
c.setBackground(UIManager.getColor("Tree.textBackground"));
tree.setRowHeight(c.getHeight());
return c;
tree.setCellEditor(new DefaultTreeCellEditor(tree,(DefaultTreeCellRenderer)tree.getCellRenderer())
public boolean isCellEditable(EventObject evt){return true;}
public Component getTreeCellEditorComponent( JTree tree, Object value, boolean isSelected, boolean expanded, boolean leaf, int row)
return (Component) ((DefaultMutableTreeNode) value).getUserObject();
JFrame frame = new JFrame("ComponentTree");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().add(tree);
frame.pack();
frame.show();
}thanks!
this seems an awful lot of code to get this working - it should be possible to have a single CellEditor/Renderer??
also running the code - its very hard to select checkbox items, and the JLists seem to disable themselves when the main tree updates?
its also not general to any Component (?) (although we probably only want JComponent) so we can't add a JTree as a leaf?
I'm guessing there is a simpler way to get this working? -
How remove (or change) children inside a JTree
hi,
I did a program where there are informations with a structure of dependence that should be showed inside JTree components.
I realized this purpose in my program .
But I am findind very difficult (after having put the information inside the JTre in the start) to show them again inside the JTrees when they are changed.
I don't know how to remove or change the informations after they are put on the children of the JTree using the methods that I found in the documentation to reach this purpose...
I need some help ...
To explain well my problem, and facilitate the helpers, I post some code that show my problem..
The program show a GUI with some JTrees.
The informations are contained in two strings, and in the GUI are also two buttons that can load the informations inside the JTree when they are clicked.
Thank you in advance
regards
tonyMrsangelo
public class JTree_TryToUseIt_ChangingNodes extends javax.swing.JFrame {
private PanelFulViewConteiner jPanelFulViewConteiner;
Dimension dimPrefArcPanels = new Dimension(910, 150);
Dimension dimMinArcPanels = new Dimension(700, 100);
Dimension dimPrefSemiArcPanels = new Dimension(850, 140);
Dimension dimMinSemiArcPanels = new Dimension(550, 90);
Dimension dimPrefBodyXpicPanels = new Dimension(900, 150);
Dimension dimMinBodyXpicPanels = new Dimension(700, 150);
Dimension treePrefDim = new Dimension(90, 110); //
Dimension treeMinDim = new Dimension(60, 110);
PanelToShowTrees panel_trees;
public JTree_TryToUseIt_ChangingNodes() {
getContentPane().setLayout(new GridBagLayout());
GridBagConstraints gBC = new GridBagConstraints();
jPanelFulViewConteiner = new PanelFulViewConteiner();
gBC.gridx = 0;
gBC.gridy = 0;
gBC.gridwidth = 10;
add(jPanelFulViewConteiner, new GridBagConstraints());
gBC.gridx = 0;
gBC.gridy = 1;
gBC.gridwidth = 10;
pack();
panel_trees = this.jPanelFulViewConteiner.jPanelFulContainerTop.panelToShowTrees;
setDefaultCloseOperation(EXIT_ON_CLOSE);
setLocation(50, 50);
setVisible(true);
private void fillTrees(String[] strings) {
collapseTrees();
removeNodes();
for (int index = 0; index < strings.length; index++) {
DefaultMutableTreeNode dmt = new DefaultMutableTreeNode(strings[index]);
String knotStr = strings[index].substring(0, 1);
int knot = -1;
try {
knot = Integer.parseInt(knotStr);
} catch (NumberFormatException e) {
panel_trees.root_Node[knot].add(dmt);
panel_trees.validate();
panel_trees.repaint();
collapseTrees();
void collapseTrees() {
for (int i = 0; i < 8; i++) {
panel_trees.jTree.collapseRow(0);
panel_trees.jTree[i].expandRow(0);
panel_trees.validate();
panel_trees.repaint();
void removeNodes() {
for (int i = 0; i < 8; i++) {
panel_trees.jTree[i].removeAll();
panel_trees.validate();
panel_trees.repaint();
public static void main(String args[]) {
JTree_TryToUseIt_ChangingNodes xx = new JTree_TryToUseIt_ChangingNodes();
class PanelFulViewConteiner extends JPanel {
PanelFulContainerTop jPanelFulContainerTop;
PanelFulContainerBottom jPanelFulContainerBottom;
public PanelFulViewConteiner() {
GridBagLayout gbl = new GridBagLayout();
this.setLayout(gbl);
GridBagConstraints gBC = new GridBagConstraints();
jPanelFulContainerTop = new PanelFulContainerTop();
gBC.gridx = 0;
gBC.gridy = 0;
add(jPanelFulContainerTop, gBC);
jPanelFulContainerBottom = new PanelFulContainerBottom();
gBC.gridx = 0;
gBC.gridy = 2;
add(jPanelFulContainerBottom, gBC);
class PanelFulContainerTop extends JPanel {
PanelToShowTrees panelToShowTrees;
public PanelFulContainerTop() { // costruttore
this.setMinimumSize(dimMinArcPanels);
this.setPreferredSize(dimPrefArcPanels);
setLayout(new FlowLayout());
panelToShowTrees = new PanelToShowTrees();
add(panelToShowTrees);
}// costruttore
class PanelFulContainerBottom extends JPanel {
JButton but1 = new JButton("load string1");
JButton but2 = new JButton("load string2");
String[] str1 = {"0-AAA", "0-BBBBBB", "2-CCCCC", "2-DDDDDD", "2-EEEEEEE", "5-FFFFFF", "5-GGGGGG", "5-HHHHHH", "7-IIIIII", "7-KKKKKKK", "7-LLLLLL", "7-MMMMMM"};
String[] str2 = {"0-aaaaa", "0-bbbbb", "0-cccc", "2-ddddd", "2-eeee", "3-ffffff", "3-gggggg", "3-hhhhh", "4-iiiiii", "4-kkkkk", "7-lllllll", "7-mmmmm", "7-nnnnn"};
public PanelFulContainerBottom() {// costruttore
this.setMinimumSize(dimMinArcPanels);
this.setPreferredSize(dimPrefArcPanels);
add(but1);
but1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fillTrees(str1);
add(but2);
but2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fillTrees(str2);
class PanelToShowTrees extends JPanel {
JScrollPane jScrollPane[];
JTree jTree[];
DefaultMutableTreeNode[] root_Node;
public PanelToShowTrees() {
this.setMinimumSize(dimMinSemiArcPanels);
this.setPreferredSize(dimPrefSemiArcPanels);
setLayout(new FlowLayout());
jScrollPane = new JScrollPane[8];
jTree = new JTree[8];
root_Node = new DefaultMutableTreeNode[8];
for (int i = 0; i < 8; i++) {
root_Node[i] = new DefaultMutableTreeNode(" " + (8 - i));
jTree[i] = new JTree(root_Node[i]);
jScrollPane[i] = new JScrollPane();
jScrollPane[i].setViewportView(jTree[i]);
add(jScrollPane[i]);
jScrollPane[i].setPreferredSize(treePrefDim);
jScrollPane[i].setMinimumSize(treeMinDim);
jTree[i].addTreeSelectionListener(new TreeSelectionListener() {
public void valueChanged(TreeSelectionEvent e) {
showContentOfTheTree(e);
private void showContentOfTheTree(TreeSelectionEvent e) {
String stringaGotFromEvent = e.getPath().toString();
JOptionPane.showMessageDialog(rootPane, "found =---> " + stringaGotFromEvent);hi Andre,
thank you for answering me.
I have not much practice with JTrees so I find some difficulty to use it...
After I got your advice, I made changed a little the design of my program..
This it is a program for management of a dentist office, and I would show in 8 JTrees (every jTree root represents the teeth in a dental arch) the treatments that each tooth got.
How I said, the 8 JTree roots are representing the teeth, and in this architecture the problem is:
- to add a node to a tree root to indicate a treatment for that tooth;
- to delete all the children from a jTree root before beginning to add new child, before writing again treatments, when the informations are changed.
Following your help, I made this two functions to reach this purpose:
private void assingTreatmentToTooth(int toothNmbr, String strTreatment) {
DefaultMutableTreeNode newChild = new DefaultMutableTreeNode(strTreatment); // new treatment to add
DefaultTreeModel model = (DefaultTreeModel) panel_trees.jTreeXdentalRoots[toothNmbr].getModel(); // get model for the root Tree
DefaultMutableTreeNode parentNode = (DefaultMutableTreeNode) model.getRoot();
model.insertNodeInto(newChild, parentNode, 0); // always assign 0 as first node
} // assingTreatmentToTooth()
private void removeTreatmentFromAtooth(int toothNmbr, int childNmbr) {
DefaultTreeModel model = (DefaultTreeModel) panel_trees.jTreeXdentalRoots[toothNmbr].getModel(); // get model for the root Tree
DefaultMutableTreeNode child = (DefaultMutableTreeNode) model.getChild(model, childNmbr);
model.removeNodeFromParent(child);
} // removeTreatmentToTooth()when the second function is executed, I get this error:
Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException: javax.swing.tree.DefaultTreeModel cannot be cast to javax.swing.tree.TreeNode
at the line : DefaultMutableTreeNode child = (DefaultMutableTreeNode) model.getChild(model, childNmbr);
DefaultMutableTreeNode child = (DefaultMutableTreeNode) model.getChild(model, childNmbr);
could you tell me what is wrong ?
regards
TonyMrsangelo -
JTree cut and paste multiple child and ancestor nodes not function correct
Hello i'm creating a filebrowser for multimedia files (SDK 1.22) such as .jpg .gif .au .wav. (using Swing, JTree, DefaultMutableTreeNode)
The problem is I want to cut and paste single and multiple nodes (from current node til the last child "top-down") which partly functions:
single nodes and multiple nodes with only one folder per hierarchy level;
Not function:
- multiple folders in the same level -> the former order gets lost
- if there is a file (MMed. document) between folders (or after them) in the same level this file is put inside one of those
I tried much easier functions to cope with this problem but every time I solve one the "steps" the next problem appears...
The thing I don't want to do, is something like a LinkedList, Hashtable (to store the nodes)... because the MMed. filebrowser would need to much resources while browsing through a media library with (e.g.) thousands of files!
If someone has any idea to solve this problem I would be very pleased!
Thank you anyway by reading this ;)
// part of the code, if you want more detailed info
// @mail: [email protected]
import java.util.Enumeration;
import javax.swing.*;
import javax.swing.tree.*;
// var declaration
static Enumeration en;
static DefaultMutableTreeNode jTreeModel, lastCopiedNode, dmt, insert, insertParent, insertSameFolder;
static String varCut;
static int index= 0;
static int counter = 0;
/* cut function */
if (actionCommand.equals ("cut"))
// get the selected node (DefaultMutableTreeNode)
lastCopiedNode = (DefaultMutableTreeNode) selPath.getLastPathComponent ();
// get the nodes in an Enumeration array (in top- down order)
en = dmt.preorderEnumeration();
// the way to make sure if it is a cut or a copied node
varCut = "cut";
/* paste function */
if (actionCommand.equals ("paste"))
// node is cut
if (varCut == "cut")
// is necessary for first time same folder case
insertParent = dmt;
// getting the nodes out of the array
while(en.hasMoreElements())
// cast the Object to DefaultMutableTreeNode
// and get stored (next) node
insert = (DefaultMutableTreeNode) en.nextElement();
// check if the node is a catalogue when getRepresentation()
// is a function of my node creating class (to know if it is
// a folder or a file)
if (insert.getRepresentation().equals("catalogue"))
// check if a "folder" node is inserted
if (index == 1)
counter = 0;
index = 0;
System.out.println ("***index and counter reset***");
// the node is in the same folder
// check if the folder is in the same hierarchy level
// -> in this case the insertParent has to remain
if (insert.getLevel() == insertParent.getLevel())
// this is necessary to get right parent folder
insertSameFolder = (Knoten) insert.getParent();
jTreeModel.insertNodeInto (insert, insertSameFolder, index);
System.out.println (">>>sameFolderCASE- insert"+counter+"> " + String.valueOf(insert) +
"\ninsertTest -> " + String.valueOf(insertTest)
// set insertParent folder to the new createded one
insertParent = insert;
index ++;
else // the node is a subfolder
// insertNode
jTreeModel.insertNodeInto (insert, insertParent, index);
// set insertParent folder to the new createded one
insertParent = insert;
System.out.println (">>>subFolderCASE- insertParent"+counter+"> " + String.valueOf(insertParent) +
"\ninsertParent -> " + String.valueOf(insertParent)
index ++;
else // the node is a file
// insertNode
jTreeModel.insertNodeInto (insert, insertParent, counter);
System.out.println (">>>fileCASE insert "+counter+"> " + String.valueOf(insert) +
"\ninsertParent -> " + String.valueOf(insertParent)
counter ++;
// reset index and counter for the next loop
index = 0;
counter = 0;
// reset cut var
varCut = null;
// remove the node (automatically deletes subfolders and files)
dmt.removeNodeFromParent (lastCopiedNode);
// if node is a copied one
if varCut == null)
// insert copied node the same way as for cut one's
// to make it possible to copy more than one node
}You need to use a recursive copy method to do this. Here's a simple example of the copy. To do a cut you need to do a copy and then delete the source.
import java.io.*;
import javax.swing.*;
import javax.swing.tree.*;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.*;
import java.util.*;
public class CopyTree extends JFrame
Container cp;
JTree cTree;
JScrollPane spTree;
DefaultTreeModel cModel;
CNode cRoot;
JMenuBar menuBar = new JMenuBar();
JMenu editMenu = new JMenu("Edit");
JMenuItem copyItem = new JMenuItem("Copy");
JMenuItem pasteItem = new JMenuItem("Paste");
TreePath [] sourcePaths;
TreePath [] destPaths;
// =====================================================================
// constructors and public methods
CopyTree()
super("Copy Tree Example");
addWindowListener(new WindowAdapter()
{public void windowClosing(WindowEvent evt){System.exit(0);}});
// edit menu
copyItem.addActionListener(new ActionListener()
{public void actionPerformed(ActionEvent e){mnuCopy();}});
editMenu.add(copyItem);
pasteItem.addActionListener(new ActionListener()
{public void actionPerformed(ActionEvent e){mnuPaste();}});
editMenu.add(pasteItem);
menuBar.add(editMenu);
setJMenuBar(menuBar);
buildModel();
cp = getContentPane();
cTree = new JTree(cModel);
spTree = new JScrollPane(cTree);
cp.add(spTree, BorderLayout.CENTER);
pack();
static public void main(String [] args)
new CopyTree().show();
// =====================================================================
// private methods - User Interface
private void mnuCopy()
sourcePaths = cTree.getSelectionPaths();
private void mnuPaste()
TreePath sp, dp;
CNode sn,dn;
int i;
destPaths = cTree.getSelectionPaths();
if(1 == destPaths.length)
dp = destPaths[0];
for(i=0; i< sourcePaths.length;i++)
sp = sourcePaths;
if(sp.isDescendant(dp) || dp.isDescendant(sp))
JOptionPane.showMessageDialog
(null, "source and destinations overlap","Paste", JOptionPane.ERROR_MESSAGE);
return;
dn = (CNode)dp.getLastPathComponent(); // the node we will append our source to
for(i=0; i< sourcePaths.length;i++)
sn = (CNode)sourcePaths[i].getLastPathComponent();
copyNode(sn,dn);
else
JOptionPane.showMessageDialog
(null, "multiple destinations not allowed","Paste", JOptionPane.ERROR_MESSAGE);
// recursive copy method
private void copyNode(CNode sn, CNode dn)
int i;
CNode scn = new CNode(sn); // make a copy of the node
// insert it into the model
cModel.insertNodeInto(scn,dn,dn.getChildCount());
// copy its children
for(i = 0; i<sn.getChildCount();i++)
copyNode((CNode)sn.getChildAt(i),scn);
// ===================================================================
// private methods - just a sample tree
private void buildModel()
int k = 0;
cRoot = new CNode("root");
cModel = new DefaultTreeModel(cRoot);
CNode n1a = new CNode("n1a");
cModel.insertNodeInto(n1a,cRoot,k++);
CNode n1b = new CNode("n1b");
cModel.insertNodeInto(n1b,cRoot,k++);
CNode n1c = new CNode("n1c");
cModel.insertNodeInto(n1c,cRoot,k++);
CNode n1d = new CNode("n1d");
cModel.insertNodeInto(n1d,cRoot,k++);
k = 0;
CNode n1a1 = new CNode("n1a1");
cModel.insertNodeInto(n1a1,n1a,k++);
CNode n1a2 = new CNode("n1a2");
cModel.insertNodeInto(n1a2,n1a,k++);
CNode n1a3 = new CNode("n1a3");
cModel.insertNodeInto(n1a3,n1a,k++);
CNode n1a4 = new CNode("n1a4");
cModel.insertNodeInto(n1a4,n1a,k++);
k = 0;
CNode n1c1 = new CNode("n1c1");
cModel.insertNodeInto(n1c1,n1c,k++);
CNode n1c2 = new CNode("n1c2");
cModel.insertNodeInto(n1c2,n1c,k++);
// simple tree node with copy constructor
class CNode extends DefaultMutableTreeNode
private String name = "";
// default constructor
CNode(){this("");}
// new constructor
CNode(String n){super(n);}
// copy constructor
CNode(CNode c)
super(c.getName());
public String getName(){return (String)getUserObject();}
public String toString(){return getName();}
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