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Code for JTree with checkbox

 
mahesh gaonkar
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i want the example of Jtree with checkbox,first requirement is checkbox should be selected only when click on it not on label,and second requirement i want multiple checkbox be selected on mouse click on checkbox,any sloution shoud be apperciated

[ May 27, 2007: Message edited by: mahesh gaonkar ]
[ May 27, 2007: Message edited by: mahesh gaonkar ]
 
Pravin Jain
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You can use the TreeModel, TreeCellRenderer and TreeCellEditor.
 
mahesh gaonkar
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THAT I KNOW ,BUT I WANT THE CODE FOR THAT,PLEAE SEND ME A CODE
ANY REPLY APPERCIATED
 
Ulf Dittmer
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Welcome to JavaRanch.

I think you misunderstand what we do here at JavaRanch. We try to help people learn Java, not provide them with ready-made solutions to their problems. If you are stuck in your implementation, post the code you have so far, and indicate what it does or does not do. Then we can help you get going again.

And please, KeepItDown.
 
mahesh gaonkar
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Please tell me what is wrong in this code.problem is i am not able check the multiple checkbox at a time


code


import java.awt.*;
import java.awt.event.*;
import java.util.EventObject;
import javax.swing.*;
import javax.swing.tree.*;
import java.util.*;

public class SplitNodeTest
{
private JScrollPane getContent()
{
DefaultMutableTreeNoderoot = new DefaultMutableTreeNode("Root");
DefaultMutableTreeNoderoot1 = new DefaultMutableTreeNode(new SplitNode("Node 1", false));
DefaultMutableTreeNoderoot2 = new DefaultMutableTreeNode(new SplitNode("Node 2", false));
root1.add(root2);
root.add(root1);
// root.add(new DefaultMutableTreeNode(new SplitNode("Node 1", false)));
// root.add(new DefaultMutableTreeNode(new SplitNode("Node 2", true)));
JTree tree= new JTree(newDefaultTreeModel(root));
tree.setEditable(true);
tree.setCellRenderer(new SplitNodeRenderer());
tree.setCellEditor(new SplitNodeEditor(tree,root));
return new JScrollPane(tree);
}
public static void main(String[] args)
{
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new SplitNodeTest().getContent());
f.setSize(360,300);
f.setLocation(200,200);
f.setVisible(true);
}
}
class SplitNodeextends DefaultMutableTreeNode
{
Stringname;
boolean value;
protected boolean isSelected;

public SplitNode(Strings, boolean isSelected)
{
name = s;
this.isSelected =isSelected;
}
public void setSelected(boolean isSelected) {
this.isSelected = isSelected;

if (children != null) {
Enumeration enum = children.elements();
while (enum.hasMoreElements()) {
CheckNode node = (CheckNode)enum.nextElement();
node.setSelected(isSelected);
}
}
}

public boolean isSelected() {
return isSelected;
}

}
class SplitNodeRenderer implementsTreeCellRenderer
{
JLabel label;
JCheckBox checkBox;
JTextField textField;
JPanel panel;

public SplitNodeRenderer()
{
label = new JLabel();
checkBox = new JCheckBox();
checkBox.setBackground(UIManager.getColor("Tree.background"));
checkBox.setBorder(null);
textField =newJTextField();
textField.setEditable(false);
textField.setBackground(UIManager.getColor("Tree.background"));
textField.setBorder(null);
panel = new JPanel();
panel.setOpaque(false);
panel.add(checkBox);
panel.add(textField);
}
public Component getTreeCellRendererComponent(JTree tree,Objectvalue,boolean selected, boolean expanded,
boolean leaf,int row,boolean hasFocus)
{
DefaultMutableTreeNode node =(DefaultMutableTreeNode)value;

if(node.getUserObject() instanceof SplitNode)
{
SplitNode splitNode = (SplitNode)node.getUserObject();
checkBox.setSelected(selected);
textField.setText(splitNode.name);
return panel;
}
else
{
label.setText(node.toString());
return label;
}
}
}
class SplitNodeEditor extends AbstractCellEditor implements TreeCellEditor, ActionListener
{
JLabellabel;
JCheckBoxcheckBox;
JTextFieldtextField;
SplitNodesplitNode;
JComponent editedComponent;
JPanelpanel;
final JTree Tree;
Object value1;
public SplitNodeEditor(JTree tree,Object value)
{
label = new JLabel();
checkBox = new JCheckBox();
checkBox.addActionListener(this);
checkBox.setBackground(UIManager.getColor("Tree.background"));
checkBox.setBorder(null);
this.Tree = tree;

value1= value;
checkBox.addMouseListener(new MouseAdapter() {

public void mousePressed(MouseEvent e)
{
System.out.println("hello");
int x = e.getX();
int y = e.getY();
int row = Tree.getRowForLocation(x, y);

TreePath path = Tree.getPathForRow(1);
// System.out.println(path.getLastPathComponent());
DefaultMutableTreeNodenode1 = (DefaultMutableTreeNode)value1;
//if(node.getUserObject() instanceofSplitNode)
//System.out.println(node1.getUserObject());
//TreePath path = tree.getSelectionPath();
if (path != null && node1.getUserObject() instanceof SplitNode) {
SplitNode node = (SplitNode)path.getLastPathComponent();
boolean isSelected = ! (node.isSelected());
System.out.println(isSelected);
node.setSelected(isSelected);
((DefaultTreeModel) Tree.getModel()).nodeChanged(node);
}
}

publicvoid mouseReleased(MouseEvent e)
{
checkBox.setBorder(null);
}
});
textField = new JTextField();
textField.addActionListener(this);
textField.setBackground(UIManager.getColor("Tree.background"));
textField.setBorder(null);
panel = new JPanel();
panel.setOpaque(false);
panel.add(checkBox);
panel.add(textField);
}
public Component getTreeCellEditorComponent(JTreetree,Objectvalue,boolean isSelected, boolean expanded,boolean leaf,int row)
{
DefaultMutableTreeNodenode = (DefaultMutableTreeNode)value;
if(node.getUserObject() instanceofSplitNode)
{
splitNode =(SplitNode)node.getUserObject();
checkBox.setSelected(splitNode.isSelected());
textField.setText(splitNode.name);
return panel;
}
else
{
label.setText(node.toString());
return label;
}
}
public Object getCellEditorValue()
{
if(editedComponent == textField)
splitNode.name = textField.getText();
else
splitNode.value = checkBox.isSelected();
returnsplitNode;
}
public boolean isCellEditable(EventObject anEvent)
{
if (anEventinstanceof MouseEvent)
{
/*Point p= ((MouseEvent)anEvent).getPoint();
JTree tree =(JTree)anEvent.getSource();
TreePathpath = tree.getPathForLocation(p.x,p.y);
DefaultMutableTreeNodenode =(DefaultMutableTreeNode)path.getLastPathComponent();
int clickCountToStart=(node.getUserObject() instanceof SplitNode) ? 1 : 2;*/
//return((MouseEvent)anEvent).getClickCount() >= clickCountToStart;
}
return true;
}
public void actionPerformed(ActionEvent e)
{
editedComponent =(JComponent)e.getSource();
super.stopCellEditing();
}
}
 
Jonathan McBride
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Your problem is right here:

mahesh gaonkar wrote:
public Component getTreeCellRendererComponent(JTree tree,Objectvalue,boolean selected, boolean expanded,
boolean leaf,int row,boolean hasFocus)
{
...
checkBox.setSelected(selected);
...


"Selected" means whether or not this is the last node that the user clicked on with his/her mouse. Only one node can be "selected" at a time. When you check a different node, the previously-selected node gets unselected, and therefore unchecked. If you want selection to toggle between checked/unchecked, do this instead:



Or, if you're feeling particularly clever/devious:

 
Rob Spoor
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I don't think Mahesh is going to read this - he hasn't been active here in over 2 years.

http://faq.javaranch.com/java/DontWakeTheZombies
 
Iban Cardona
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I need to do something like Mahesh. I will look into this post and I will try to implement a JTree with checkboxes.

Rob, I'm the same as the JTree-Zip. Now my next step is to implement the JTree with checkboxes and unzip the selected items.
 
mark goking
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...
 
Maneesh Godbole
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Mark,

I suppose you did not see http://faq.javaranch.com/java/DontWakeTheZombies which Rob indicated.
You can start a post your question in a new thread by clicking on the
 
sonia arora
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i need to implement a JTree with checkboxes as nodes and want to add a event handler on each checkbox node selection.
can someone help.
 
Devaka Cooray
ExamLab Creator
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Please read what Maneesh said.
Locking this one.
 
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