MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TreeEditor;
import org.eclipse.swt.events.FocusAdapter;
import org.eclipse.swt.events.FocusEvent;
import org.eclipse.swt.events.KeyAdapter;
import org.eclipse.swt.events.KeyEvent;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class MainClass {

    public static void main(String[] a) {

        final Display d = new Display();
        final Shell shell = new Shell(d);

        shell.setSize(250, 200);

        shell.setLayout(new FillLayout());
        final Tree tree = new Tree(shell, SWT.SINGLE);

        for (int i = 0; i < 3; i++) {
            TreeItem iItem = new TreeItem(tree, SWT.NONE);
            iItem.setText("Edit me by pressing F2 " + (i + 1));
            iItem.setExpanded(true);
        }

        final TreeEditor editor = new TreeEditor(tree);
        editor.horizontalAlignment = SWT.LEFT;
        editor.grabHorizontal = true;

        tree.addKeyListener(new KeyAdapter() {
            public void keyPressed(KeyEvent event) {
                if (event.keyCode == SWT.F2 && tree.getSelectionCount() == 1) {
                    final TreeItem item = tree.getSelection()[0];

                    final Text text = new Text(tree, SWT.NONE);
                    text.setText(item.getText());
                    text.setFocus();

                    text.addFocusListener(new FocusAdapter() {
                        public void focusLost(FocusEvent event) {
                            item.setText(text.getText());
                            text.dispose();
                        }
                    });

                    editor.setEditor(text, item);
                }
            }
        });

        shell.open();
        while (!shell.isDisposed()) {
            if (!d.readAndDispatch())
                d.sleep();
        }
        d.dispose();

    }
}