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public class ApplicationsPanel extends JPanel implements LanguageRefreshable, ActionListener, TreeSelectionListener
{
private static final long serialVersionUID = 1L;
/**************************************************
* ATTRIBUTS
**************************************************/
private JTree appTree;
private DefaultMutableTreeNode rootNode;
private DefaultTreeModel treeModel;
private MyCustomNode customNode;
private int nodeIndex = 0;
private static String ADD_COMMAND = "add";
private static String REMOVE_COMMAND = "remove";
private static String CLEAR_COMMAND = "clear";
/**************************************************
* CONSTRUCTEUR
**************************************************/
public ApplicationsPanel()
{
super();
initGUI();
}
/**************************************************
* INITIALISATION DES COMPOSANTS
**************************************************/
private void initGUI()
{
final GridBagLayout gridBagLayout = new GridBagLayout();
gridBagLayout.columnWidths = new int[] { 0 };
gridBagLayout.rowHeights = new int[] { 0, 0 };
gridBagLayout.columnWeights = new double[] { 1.0 };
gridBagLayout.rowWeights = new double[] { 1.0, 0.0 };
setLayout(gridBagLayout);
final JButton addButton = new JButton("Add");
addButton.setActionCommand(ADD_COMMAND);
addButton.addActionListener(this);
final JButton removeButton = new JButton("Remove");
removeButton.setActionCommand(REMOVE_COMMAND);
removeButton.addActionListener(this);
final JButton clearButton = new JButton("Clear");
clearButton.setActionCommand(CLEAR_COMMAND);
clearButton.addActionListener(this);
final JPanel panel = new JPanel(new GridLayout(0, 3));
panel.add(addButton);
panel.add(removeButton);
panel.add(clearButton);
add(panel, new GridBagConstraints(0, 1, 1, 1, 0.0, 0.0, GridBagConstraints.SOUTH, GridBagConstraints.HORIZONTAL, new Insets(0, 0, 0, 0), 0, 0));
rootNode = new DefaultMutableTreeNode("root");
populateTree(rootNode);
treeModel = new DefaultTreeModel(rootNode);
appTree = new JTree(rootNode);
appTree.setRootVisible(true);
appTree.setShowsRootHandles(true);
appTree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
appTree.addTreeSelectionListener(this);
// Creation d'un panneau deroulant qui va contenir l'arbre des applications
final JScrollPane treeView = new JScrollPane(appTree);
add(treeView, new GridBagConstraints(0, 0, 1, 1, 0.0, 0.0, GridBagConstraints.CENTER, GridBagConstraints.BOTH, new Insets(0, 0, 0, 0), 0, 0));
}
/**************************************************
* METHODES INTERNES
**************************************************/
private void populateTree(final DefaultMutableTreeNode top)
{
customNode = new MyCustomNode();
final DefaultMutableTreeNode app = new DefaultMutableTreeNode(customNode );
top.add(app);
}
/**************************************************
* GESTION DES NOEUDS
**************************************************/
/** Remove all nodes except the root node. */
public void clear()
{
rootNode.removeAllChildren();
treeModel.reload();
}
/** Remove the currently selected node. */
public void removeCurrentNode()
{
final TreePath currentSelection = appTree.getSelectionPath();
if (currentSelection != null)
{
final DefaultMutableTreeNode currentNode = (DefaultMutableTreeNode)(currentSelection.getLastPathComponent());
final MutableTreeNode parent = (MutableTreeNode)(currentNode.getParent());
if (parent != null)
{
treeModel.removeNodeFromParent(currentNode);
return;
}
}
// Si pas de noeud selectionné on ne fait rien
}
/**
* Ajoute un fils au noeud sélectionné
*/
public DefaultMutableTreeNode addObject(final Object child)
{
DefaultMutableTreeNode parentNode = null;
final TreePath parentPath = appTree.getSelectionPath();
if (parentPath == null)
{
parentNode = rootNode;
}
else
{
parentNode = (DefaultMutableTreeNode)(parentPath.getLastPathComponent());
}
return addObject(parentNode, child, true);
}
public DefaultMutableTreeNode addObject(final DefaultMutableTreeNode parent, final Object child)
{
return addObject(parent, child, false);
}
public DefaultMutableTreeNode addObject(DefaultMutableTreeNode parent, final Object child, final boolean shouldBeVisible)
{
final DefaultMutableTreeNode childNode = new DefaultMutableTreeNode(child);
if (parent == null)
{
parent = rootNode;
}
//It is key to invoke this on the TreeModel, and NOT DefaultMutableTreeNode
treeModel.insertNodeInto(childNode, parent, parent.getChildCount());
//Make sure the user can see the new node.
if (shouldBeVisible)
{
appTree.scrollPathToVisible(new TreePath(childNode.getPath()));
}
return childNode;
}
/**************************************************
* GESTION DES EVENEMENTS
**************************************************/
@Override
public void actionPerformed(final ActionEvent e)
{
final String command = e.getActionCommand();
if (ADD_COMMAND.equals(command))
{
//Add button clicked
addObject("New Node " + nodeIndex++);
}
else if (REMOVE_COMMAND.equals(command))
{
//Remove button clicked
removeCurrentNode();
}
else if (CLEAR_COMMAND.equals(command))
{
//Clear button clicked.
clear();
}
treeModel.reload();
}
@Override
public void refreshLanguage()
{
// TODO Auto-generated method stub
}
@Override
public void valueChanged(final TreeSelectionEvent e)
{
// TODO Auto-generated method stub
}
} |
Ajout de Noeud dans un JTree dynamique
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