/*******************************************************************************
 * Copyright (c) 2006, 2015 Tom Schindl and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     Tom Schindl - initial API and implementation
 *     Jeanderson Candido <http://jeandersonbc.github.io> - Bug 414565
 *     Simon Scholz <simon.scholz@vogella.com> - Bug 448143
 *     Lars Vogel <Lars.Vogel@vogella.com> - Bug 475361
 *******************************************************************************/

package org.eclipse.jface.snippets.viewers;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CellEditor;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.ColumnViewerEditor;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationEvent;
import org.eclipse.jface.viewers.ColumnViewerEditorActivationStrategy;
import org.eclipse.jface.viewers.EditingSupport;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.TableViewerColumn;
import org.eclipse.jface.viewers.TableViewerEditor;
import org.eclipse.jface.viewers.TextCellEditor;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

/**
 * Shows how to setup a Viewer to start cell editing on double click
 *
 * @author Tom Schindl &lt;tom.schindl@bestsolution.at&gt;
 */
public class Snippet052DoubleClickCellEditor {

	public static boolean flag = true;

	public static class MyModel {
		public int counter;

		public MyModel(int counter) {
			this.counter = counter;
		}

		@Override
		public String toString() {
			return "Item " + this.counter;
		}
	}

	public Snippet052DoubleClickCellEditor(Shell shell) {
		final TableViewer viewer = new TableViewer(shell, SWT.BORDER
				| SWT.FULL_SELECTION);
		viewer.setContentProvider(ArrayContentProvider.getInstance());

		ColumnViewerEditorActivationStrategy actSupport = new ColumnViewerEditorActivationStrategy(
				viewer) {
			@Override
			protected boolean isEditorActivationEvent(
					ColumnViewerEditorActivationEvent event) {
				return event.eventType == ColumnViewerEditorActivationEvent.TRAVERSAL
						|| event.eventType == ColumnViewerEditorActivationEvent.MOUSE_DOUBLE_CLICK_SELECTION
						|| event.eventType == ColumnViewerEditorActivationEvent.PROGRAMMATIC;
			}
		};

		int feature = ColumnViewerEditor.TABBING_HORIZONTAL
				| ColumnViewerEditor.TABBING_MOVE_TO_ROW_NEIGHBOR
				| ColumnViewerEditor.TABBING_VERTICAL
				| ColumnViewerEditor.KEYBOARD_ACTIVATION;

		TableViewerEditor.create(viewer, actSupport, feature);

		String[] labels = { "Column 1", "Column 2", "Column 3" };
		String[] properties = new String[] { "1", "2", "3" };
		int i = 0;
		for (String label : labels) {
			createColumnFor(viewer, label, properties[i++]);
		}
		viewer.setInput(createModel());
		viewer.getTable().setLinesVisible(true);
		viewer.getTable().setHeaderVisible(true);
	}

	private TableViewerColumn createColumnFor(final TableViewer viewer,
 String label, String property) {
		TableViewerColumn column;
		column = new TableViewerColumn(viewer, SWT.NONE);
		column.getColumn().setWidth(200);
		column.getColumn().setMoveable(true);
		column.getColumn().setText(label);
		column.setLabelProvider(new ColumnLabelProvider());
		column.setEditingSupport(new MyEditingSupport(viewer, property));
		return column;
	}

	private List<MyModel> createModel() {
		List<MyModel> elements = new ArrayList<>();

		for (int i = 0; i < 10; i++) {
			elements.add(new MyModel(i));
		}
		return elements;
	}

	public static void main(String[] args) {
		Display display = new Display();

		Shell shell = new Shell(display);
		shell.setLayout(new FillLayout());
		new Snippet052DoubleClickCellEditor(shell);
		shell.open();

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

	}

	private class MyEditingSupport extends EditingSupport {

		private final String property;

		public MyEditingSupport(ColumnViewer viewer, String property) {
			super(viewer);
			this.property = property;
		}

		@Override
		protected CellEditor getCellEditor(Object element) {
			return new TextCellEditor((Composite) getViewer().getControl());
		}

		@Override
		protected boolean canEdit(Object element) {
			return true;
		}

		@Override
		protected Object getValue(Object element) {
			return "Column " + property + " => " + element;
		}

		@Override
		protected void setValue(Object element, Object value) {

		}

	}

}