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| import java.awt.BorderLayout;
import java.awt.CardLayout;
import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionListener;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTree;
import javax.swing.event.TreeSelectionListener;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.DefaultTreeModel;
import javax.swing.tree.TreeNode;
import javax.swing.tree.TreeSelectionModel;
public class Exemple2 {
public static void main(String[] args) {
JFrame frame = new JFrame("Exemple");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTree tree = new JTree(new DefaultTreeModel(createTree()));
tree.setRootVisible(false);
tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
for (int i = 0; i < tree.getRowCount(); i++) {
tree.expandRow(i);
}
tree.setVisibleRowCount(10);
JPanel buttonPanel = new JPanel(new GridBagLayout());
JButton buttonPlus = new JButton("+");
buttonPlus.setActionCommand("+");
JButton buttonMinus = new JButton("-");
buttonMinus.setActionCommand("-");
List<JButton> buttonList = Arrays.asList(buttonPlus, buttonMinus);
GridBagConstraints gbc = new GridBagConstraints();
gbc.insets = new Insets(0, 0, 5, 0);
gbc.gridx=0;
gbc.gridy=GridBagConstraints.RELATIVE;
gbc.fill=GridBagConstraints.HORIZONTAL;
buttonList.forEach(button-> buttonPanel.add(button,gbc));
JPanel panel = new JPanel(new BorderLayout());
JTextArea textArea = new JTextArea();
textArea.setLineWrap(true);
textArea.setEditable(false);
textArea.setPreferredSize(new Dimension(300, 150));
JPanel treePanel = new JPanel(new BorderLayout());
treePanel.add(new JScrollPane(tree));
CardLayout cardLayout = new CardLayout();
JPanel mainPanel = new JPanel(cardLayout);
mainPanel.add(treePanel,"tree");
mainPanel.add(buttonPanel,"operators");
cardLayout.show(mainPanel, "tree");
panel.add(mainPanel);
panel.add(new JScrollPane(textArea,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_NEVER),BorderLayout.SOUTH);
frame.add(panel);
ActionListener buttonAction = e-> {
if ( textArea.getText().length()>0 ) {
textArea.append(" ");
}
textArea.append(e.getActionCommand());
cardLayout.show(mainPanel, "tree");
};
buttonList.forEach(button-> button.addActionListener(buttonAction));
TreeSelectionListener treeSelectionListener = e-> {
DefaultMutableTreeNode node = (DefaultMutableTreeNode) e.getPath().getLastPathComponent();
if ( e.isAddedPath() && node.isLeaf() ) {
if ( textArea.getText().length()>0 ) {
textArea.append(" ");
}
textArea.append(node.getUserObject().toString());
cardLayout.show(mainPanel, "operators");
tree.setSelectionPaths(null);
}
};
tree.addTreeSelectionListener(treeSelectionListener);
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
private static TreeNode createTree() {
String[] values = {
"a.b.A",
"a.b.B",
"c.C",
"c.d.D",
"c.d.E"
};
DefaultMutableTreeNode root = new DefaultMutableTreeNode();
Map<String, DefaultMutableTreeNode> map = new HashMap<>();
StringBuilder path = new StringBuilder();
map.put("", root);
for(String value : values) {
String[] treePath = value.split("\\.");
add(root, path, map, treePath, 0);
}
return root;
}
private static void add(DefaultMutableTreeNode parentNode, StringBuilder path, Map<String, DefaultMutableTreeNode> map,
String[] treePath, int depth) {
if ( depth<treePath.length ) {
int length = path.length();
if ( depth!=0 ) {
path.append('.');
}
path.append(treePath[depth]);
DefaultMutableTreeNode currentNode = map.get(path.toString());
if ( currentNode==null ) {
currentNode = new DefaultMutableTreeNode(treePath[depth]);
parentNode.add(currentNode);
map.put(path.toString(), currentNode);
}
add(currentNode, path, map, treePath, depth+1);
path.setLength(length); // pop
}
}
} |
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