Arquivo Discussoes de Programacao e Tecnologia bom, perguntei isso no basico + ng me respondeu… entao resolvi tentar aki, la vai:
tipo, eu to querendo sabe como eu faco pra muda o icone de apenas 1 node da JTree.
eu tentei pelo DefaultTreeRenderer, seguindo o exemplo do Core Java vol 2, mas tipo, la ele mostra como faz pra troca a fonte, eu fui tenta usa o mesmo metodo pra troca o icone por node… ai deu moh bugada o icone vinha em varios lugares ao invez do node q eu tinha definido
alguem da uma luz ai
Ao invés do TreeRenderer, use o TreeCellRenderer:
http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/tree/DefaultTreeCellRenderer.html
Ao invés do TreeRenderer, use o TreeCellRenderer:http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/tree/DefaultTreeCellRenderer.html
vc podia me dar um exemplo de uso plz?
JavaAlmanac diz: http://javaalmanac.com/egs/javax.swing.tree/DefIcons.html
galera, eu ja sei isso ai q vcs tao dizendo… oq eu n consigo eh definir o icone por Node!!! eu quero personalizar cada node da tree, e n somente definir o open, closed e leaf padroes…
consegui (ufa), o problema eh q eu tava definindo:
setClosedIcon();
setOpenIcon();
setLeafIcon();
enqto no renderer vc soh deve definir:
setIcon();
vo manda o exemplo completo pra quem quizer:
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.tree.*;
public class TreeEditTest extends JFrame implements ActionListener {
private DefaultTreeModel model;
private JTree tree;
private JButton addSiblingButton, addChildButton, deleteButton, editButton;
public TreeEditTest() {
setTitle("TreeEditTest");
setSize(300, 200);
setDefaultCloseOperation(EXIT_ON_CLOSE);
TreeNode root = makeSampleTree();
model = new DefaultTreeModel(root);
tree = new JTree(model);
tree.setEditable(true);
tree.setCellRenderer(new RenderizarTree());
Container contentPane = getContentPane();
JScrollPane scrollPane = new JScrollPane(tree);
contentPane.add(scrollPane, "Center");
JPanel panel = new JPanel();
addSiblingButton = new JButton("Add Sibling");
addSiblingButton.addActionListener(this);
panel.add(addSiblingButton);
addChildButton = new JButton("Add Child");
addChildButton.addActionListener(this);
panel.add(addChildButton);
deleteButton = new JButton("Delete");
deleteButton.addActionListener(this);
panel.add(deleteButton);
contentPane.add(panel, "South");
}
public TreeNode makeSampleTree() {
DefaultMutableTreeNode root = new DefaultMutableTreeNode("World");
DefaultMutableTreeNode contry = new DefaultMutableTreeNode("USA");
root.add(contry);
DefaultMutableTreeNode state = new DefaultMutableTreeNode("California");
contry.add(state);
DefaultMutableTreeNode city = new DefaultMutableTreeNode("San Jose");
state.add(city);
city = new DefaultMutableTreeNode("Cupertino");
state.add(city);
state = new DefaultMutableTreeNode("Michigan");
contry.add(state);
city = new DefaultMutableTreeNode("Ann Arbor");
state.add(city);
contry = new DefaultMutableTreeNode("Germany");
root.add(contry);
state = new DefaultMutableTreeNode("Schleswig-Holstein");
contry.add(state);
city = new DefaultMutableTreeNode("Kiel");
state.add(city);
return root;
}
public void actionPerformed(ActionEvent evt) {
DefaultMutableTreeNode selectedNode = (DefaultMutableTreeNode) tree.getLastSelectedPathComponent();
if(selectedNode == null)
return;
if(evt.getSource().equals(deleteButton)) {
if(selectedNode.getParent() != null)
model.removeNodeFromParent(selectedNode);
return;
}
DefaultMutableTreeNode newNode = new DefaultMutableTreeNode("New");
if(evt.getSource().equals(addSiblingButton)) {
DefaultMutableTreeNode parent = (DefaultMutableTreeNode) selectedNode.getParent();
if(parent != null) {
int selectedIndex = parent.getIndex(selectedNode);
model.insertNodeInto(newNode, parent, selectedIndex + 1);
}
} else if(evt.getSource().equals(addChildButton)) {
model.insertNodeInto(newNode, selectedNode, selectedNode.getChildCount());
}
TreeNode[] nodes = model.getPathToRoot(newNode);
TreePath path = new TreePath(nodes);
tree.scrollPathToVisible(path);
}
public static void main(String[] args) {
new TreeEditTest().setVisible(true);
}
}
class RenderizarTree extends DefaultTreeCellRenderer implements TreeCellRenderer {
private Font plainFont, italicFont;
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean selected, boolean expanded, boolean leaf, int row, boolean hasFocus) {
super.getTreeCellRendererComponent(tree, value, selected, expanded, leaf, row, hasFocus);
DefaultMutableTreeNode node = (DefaultMutableTreeNode) value;
if(node.toString().equals("USA")) {
setIcon(new ImageIcon("iconTest.gif"));
}
return this;
}
}
Reaproveitando este tópido… haveria algum modo de alterar os sinais de abertura e fechamento no caso do windows são sinais de + e -, haveria como alterar os valores padrões no java?
Muito fácil
vc pode mudar o + e - da arvore simplismente alterando o lookandfeel
do java
vc pode faze assim ó
------------------------------MyLookAndFeel.java-------------------------------
import java.awt.Color;
import javax.swing.UIDefaults;
import javax.swing.UIManager;
import javax.swing.plaf.metal.MetalLookAndFeel;
public class MyLookAndFeel extends MetalLookAndFeel
{
public MyLookAndFeel ()
{
super();
UIManager.put("Tree.openIcon", new ImageIcon("caminho da imagem"));
UIManager.put("Tree.leafIcon",new ImageIcon("caminho da imagem"));
UIManager.put("Tree.closedIcon", new ImageIcon("caminho da imagem"));
UIManager.put("Tree.line", new Color(0, 0, 0));
UIManager.put("Tree.expandedIcon",new ImageIcon("caminho da imagem"));
UIManager.put("Tree.collapsedIcon", new ImageIcon("caminho da imagem"));
}
public String getDescription()
{
return "LookAndFeel personalizado.";
}
public String getID()
{
return "myLookAndFeel";
}
public String getName()
{
return "myLookAndFeel";
}
public boolean isNativeLookAndFeel()
{
return false;
}
public boolean isSupportedLookAndFeel()
{
return true;
}
protected void initClassDefaults(UIDefaults tabela)
{
super.initClassDefaults(tabela);
}
}
Ai e so instala o lookand feel na sua aplicação com o codigo
String plaf="“seuspackage.MyLookAndFeel”";
try
{
UIManager.setLookAndFeel(plaf);
SwingUtilities.updateComponentTreeUI(comp);
}
catch(Exception e)
{
e.printStackTrace();
}
Na classe vc pode da um
extends MetalLookAndFeel ou
extends MotifLookAndFeel ou
extends WindowsLookAndFeel ou
extends BasicLookAndFeel
para personalizar os icone de qualquer um destes look and feel
valeu!!!