TreeEditorButton.java Source code

Introduction

Here is the source code for TreeEditorButton.java

Source

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TreeEditor;
import org.eclipse.swt.events.MouseAdapter;
import org.eclipse.swt.events.MouseEvent;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.MessageBox;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;

public class TreeEditorButton {
    public static void main(String[] args) {
        Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Text Tree Editor");
        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("Item " + (i + 1));
            for (int j = 0; j < 3; j++) {
                TreeItem jItem = new TreeItem(iItem, SWT.NONE);
                jItem.setText("Sub Item " + (j + 1));
                for (int k = 0; k < 3; k++) {
                    new TreeItem(jItem, SWT.NONE).setText("Sub Sub Item " + (k + 1));
                }
                jItem.setExpanded(true);
            }
            iItem.setExpanded(true);
        }

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

        tree.addMouseListener(new MouseAdapter() {
            public void mouseDown(MouseEvent event) {
                final TreeItem item = tree.getSelection()[0];

                final Button bn = new Button(tree, SWT.NONE);
                bn.setText("click");
                bn.setFocus();

                bn.addSelectionListener(new SelectionListener() {

                    public void widgetSelected(SelectionEvent arg0) {
                        int style = SWT.ICON_QUESTION | SWT.YES | SWT.NO;

                        MessageBox messageBox = new MessageBox(shell, style);
                        messageBox.setMessage("Message");
                        int rc = messageBox.open();

                        item.setText(rc + "");
                        bn.dispose();
                    }

                    public void widgetDefaultSelected(SelectionEvent arg0) {
                    }
                });

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

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