Exemplo: jtree abrir nodo sem click

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Exemplo: jtree abrir nodo sem click

Publicado por suspiro10 em 16/08/2009 - 2.007 visualizações

pessoal,

aqui vai um exemplo para posicionar um mouse no nodo que possui filho e apos 2 seg ele expande...

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

/*
 * treeSelectNodeWithoutClick.java
 *
 * Created on 29/04/2009, 01:50:29
 */
package outros.sunForum.jtree;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import java.util.TimerTask;
import javax.swing.JOptionPane;
import javax.swing.JTree;
import javax.swing.Timer;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreePath;

/**
 *
 * suspiro10
 */
public class treeSelectNodeWithoutClick extends javax.swing.JFrame {

DefaultMutableTreeNode root = new DefaultMutableTreeNode("root");
    DefaultTreeModel treeModel = new DefaultTreeModel(root);
    TreePath selPath;
    Timer timer;

/** Creates new form treeSelectNodeWithoutClick */
    public treeSelectNodeWithoutClick() {
        initComponents();
    }

/** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">
    private void initComponents() {

jScrollPane1 = new javax.swing.JScrollPane();
        jTree1 = new javax.swing.JTree();
        jButton1 = new javax.swing.JButton();
        jTextField1 = new javax.swing.JTextField();
        jScrollPane2 = new javax.swing.JScrollPane();
        jTextPane1 = new javax.swing.JTextPane();

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

jTree1 = new JTree(treeModel);
        MouseMotionListener mm = new MouseMotionListener(){
            public void mouseMoved(MouseEvent e) {

System.out.println("moved "+e.getX()+" "+e.getY());
                int selRow = jTree1.getRowForLocation(e.getX(), e.getY());

selPath = jTree1.getPathForLocation(e.getX(), e.getY());

// se existe nodo selecionado na jtree
                if(selRow != -1) { jTree1.setSelectionPath(selPath);
                    System.out.println("mouse moved..."+selPath);
                    DefaultMutableTreeNode no = new DefaultMutableTreeNode();
                    no =(DefaultMutableTreeNode) selPath.getLastPathComponent();
                    System.out.println("estado expansao path:"+jTree1.isExpanded(selPath));
                    if (!no.isLeaf()&&jTree1.isExpanded(selPath)==false) //nao é folha
                    {   // espera
                        timer = new Timer(2000,taskPerformerExpansionNode);
                        timer.setRepeats(false);
                        timer.start(); //executa operacao de expandir nodo
                    }
                    else
                    {}

}

public void mouseDragged(MouseEvent e) {
                System.out.println("dragged "+e.getX()+" "+e.getY());
            }
        };

jTree1.addMouseMotionListener(mm);
        jScrollPane1.setViewportView(jTree1);
        jScrollPane1.setViewportView(jTree1);

jButton1.setText("Add");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

jTextPane1.setText("Posicione o mouse sobre um nodo com filho e 2 seg ele expande");
        jScrollPane2.setViewportView(jTextPane1);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(31, 31, 31)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 74, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(44, 44, 44)
                        .addComponent(jTextField1, javax.swing.GroupLayout.DEFAULT_SIZE, 94, Short.MAX_VALUE)
                        .addGap(18, 18, 18)
                        .addComponent(jButton1)
                        .addGap(88, 88, 88))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(63, 63, 63)
                        .addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 179, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap())))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(35, 35, 35)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addComponent(jScrollPane2)
                        .addGap(18, 18, 18)
                        .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                            .addComponent(jButton1)
                            .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
                        .addGap(163, 163, 163))
                    .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 275, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addContainerGap())))
        );

pack();
    }// </editor-fold>

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        TreePath parentPath = jTree1.getSelectionPath();
       if (parentPath==null)  
       { JOptionPane.showMessageDialog(null, "Selecione um item na jtree");
        return;
       }
        DefaultMutableTreeNode parent = (DefaultMutableTreeNode) jTree1.getLastSelectedPathComponent();
        DefaultMutableTreeNode node = new DefaultMutableTreeNode(jTextField1.getText());
        treeModel.insertNodeInto(node, parent, parent.getChildCount());
    }

/**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {

public void run() {
                new treeSelectNodeWithoutClick().setVisible(true);
            }
        });
    }

// expande nodo da jtree
    ActionListener taskPerformerExpansionNode = new ActionListener() {

public void actionPerformed(ActionEvent evt) {

jTree1.expandPath(selPath);
            jTree1.repaint();
            timer.stop();

}
    };
    // Variables declaration - do not modify
    private javax.swing.JButton jButton1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JScrollPane jScrollPane2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextPane jTextPane1;
    private javax.swing.JTree jTree1;
    // End of variables declaration
}

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Exemplo: jtree abrir nodo sem click

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