tablecelleditorlistener.java

Python Development Environment (Python IDE plugin for Eclipse). Features editor, code completion, re

package org.python.pydev.refactoring.ui.pages.listener;

import java.util.Observable;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TableEditor;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.Text;
import org.python.pydev.refactoring.ui.model.table.SimpleTableItem;

public class TableCellEditorListener extends Observable implements Listener {

	private final Table table;

	private IValidationPage wizard;

	public TableCellEditorListener(IValidationPage wizard, Table parametersTable) {
		this.wizard = wizard;
		this.table = parametersTable;
	}

	/**
	 * http://www.eclipse.org/swt/snippets/
	 */
	public void handleEvent(Event event) {

		final TableEditor editor = new TableEditor(table);
		editor.horizontalAlignment = SWT.LEFT;
		editor.grabHorizontal = true;

		Rectangle clientArea = table.getClientArea();
		if (table.getSelection().length != 1)
			return;
		Rectangle bounds = table.getSelection()[0].getBounds();
		Point pt = new Point(bounds.x, bounds.y);
		int index = table.getTopIndex();
		while (index < table.getItemCount()) {
			boolean visible = false;
			final SimpleTableItem item = (SimpleTableItem) table.getItem(index);
			for (int i = 0; i < table.getColumnCount(); i++) {
				Rectangle rect = item.getBounds(i);
				if (rect.contains(pt)) {

					final Text text = new Text(table, SWT.NONE);
					Listener textListener = new TextListener(item, text);

					text.addListener(SWT.FocusOut, textListener);
					text.addListener(SWT.Traverse, textListener);
					text.addListener(SWT.FocusOut, wizard);
					editor.setEditor(text, item, i);
					text.setText(item.getText(i));
					text.selectAll();
					text.setFocus();
					return;
				}
				if (!visible && rect.intersects(clientArea)) {
					visible = true;
				}
			}
			if (!visible) {
				return;
			}
			index++;
		}
	}

	private final class TextListener implements Listener {
		private SimpleTableItem tableItem;

		private final Text text;

		private TextListener(SimpleTableItem item, Text text) {
			this.tableItem = item;
			this.text = text;
		}

		public void handleEvent(final Event e) {
			if (e.type == SWT.FocusOut) {
				tableItem.setText(text.getText());
				text.dispose();
				table.setFocus();
			} else if (e.type == SWT.Traverse) {
				if (e.detail == SWT.TRAVERSE_RETURN) {
					tableItem.setText(text.getText());
					e.doit = true;
				}
				if (e.detail == SWT.TRAVERSE_RETURN || e.detail == SWT.TRAVERSE_ESCAPE) {
					text.dispose();
					if (e.detail == SWT.TRAVERSE_ESCAPE)
						e.doit = false;
				}
			}
		}
	}
}