/*******************************************************************************
 * Copyright (c) 2007 Exadel, Inc. and Red Hat, Inc.
 * Distributed under license by Red Hat, Inc. All rights reserved.
 * This program is made available under the terms of the
 * Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Exadel, Inc. and Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.jboss.tools.jst.web.ui.internal.css.dialog.tabs;

import java.util.ArrayList;
import java.util.Set;

import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.TreeEditor;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeColumn;
import org.eclipse.swt.widgets.TreeItem;
import org.jboss.tools.jst.web.ui.internal.css.dialog.common.CSSConstants;
import org.jboss.tools.jst.web.ui.internal.css.dialog.common.StyleAttributes;
import org.jboss.tools.jst.web.ui.internal.editor.messages.JstUIMessages;

/**
 * Class for creating Property sheet tab
 * 
 * @author Evgeny Zheleznyakov
 */
public class TabPropertySheetControl extends BaseTabControl {

	final static private String[] COLUMNS = new String[] {
			JstUIMessages.PROPERTY_NAME_COLUMN,
			JstUIMessages.PROPERTY_VALUE_COLUMN };
	final static private int COLUMNS_WIDTH = 200;

	private Tree tree;

	/**
	 * Constructor for creating controls
	 * 
	 * @param composite
	 *            The parent composite for tab
	 * @param elementMap
	 * @param comboMap
	 * @param styleAttributes
	 *            the StyleAttributes object
	 */
	public TabPropertySheetControl(Composite parent,
			StyleAttributes styleAttributes, DataBindingContext bindingContext) {
		super(bindingContext, styleAttributes, parent, SWT.NONE);
		setLayout(new FillLayout());

		tree = new Tree(this, SWT.FULL_SELECTION | SWT.SINGLE
				| SWT.HIDE_SELECTION);
		tree.setHeaderVisible(true);
		tree.setLinesVisible(true);

		// Create columns
		for (int i = 0; i < COLUMNS.length; i++) {
			TreeColumn column = new TreeColumn(tree, SWT.LEFT | SWT.COLOR_BLACK);

			column.setText(COLUMNS[i]);
			column.setWidth(COLUMNS_WIDTH);
		}

		Set<String> sections = CSSConstants.CSS_STYLES_MAP.keySet();
		for (String sectionKey : sections) {

			TreeItem sectionTreeItem = createTreeItem(tree, sectionKey);
			sectionTreeItem.setExpanded(true);
			ArrayList<String> attributeKeys = CSSConstants.CSS_STYLES_MAP
					.get(sectionKey);

			for (String attribute : attributeKeys) {
				TreeItem item = createBindedTreeItem(sectionTreeItem, attribute);
				item.setExpanded(true);
			}
			sectionTreeItem.setExpanded(true);
		}

		final TreeEditor editor = new TreeEditor(tree);
		editor.horizontalAlignment = SWT.LEFT;
		editor.grabHorizontal = true;
		editor.minimumHeight = 0;
		editor.minimumWidth = 0;

		tree.addSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				// Clean up any previous editor control
				Control oldEditor = editor.getEditor();
				if (oldEditor != null)
					oldEditor.dispose();

				// Identify the selected row
				TreeItem item = (TreeItem) e.item;
				if (item == null)
					return;

				// The control that will be the editor must be a child of the
				// Tree
				Control newEditor = null;
				if (!CSSConstants.CSS_STYLES_MAP.containsKey((item
						.getText(NAME_ATTRIBUTE_COLUMN)))) {
					newEditor = createControl(tree, item
							.getText(NAME_ATTRIBUTE_COLUMN));
				}

				if (newEditor != null) {

					newEditor.setFocus();

					// Compute the width for the editor
					// Also, compute the column width, so that the dropdown fits
					Point size = newEditor
							.computeSize(SWT.DEFAULT, SWT.DEFAULT);
					editor.minimumWidth = size.x;
					editor.minimumHeight = size.y;

					if (tree.getColumn(VALUE_ATTRIBUTE_COLUMN).getWidth() < editor.minimumWidth)
						tree.getColumn(VALUE_ATTRIBUTE_COLUMN).setWidth(
								editor.minimumWidth);

					editor.setEditor(newEditor, item, VALUE_ATTRIBUTE_COLUMN);
				}
			}
		});

	}
}
