bundles/org.eclipse.emf.emfstore.client.ui/src/org/eclipse/emf/emfstore/internal/client/ui/dialogs/admin/OrgUnitManagementGUI.java

/*******************************************************************************
 * Copyright (c) 2008-2011 Chair for Applied Software Engineering,
 * Technische Universitaet Muenchen.
 * All rights reserved. This program and the accompanying materials
 * are 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:
 * Zardosht Hodaie - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.emfstore.internal.client.ui.dialogs.admin;

import org.eclipse.emf.emfstore.internal.client.model.AdminBroker;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.SashForm;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.TabFolder;
import org.eclipse.swt.widgets.TabItem;
import org.eclipse.ui.forms.widgets.FormToolkit;

/**
 * This class provides the contents of ManageOrgUnitsDialog. It contains a
 * TabFolder with three tabs for Projects, Groups, and Users. On the right side
 * there is a properties view (PropertisForm). When user double clicks an item
 * in a tab, its details are shown in details view
 *
 * @author Hodaie
 */
public class OrgUnitManagementGUI {

	// This keeps track of active tab;
	// PropertiesForm need to know the activeTab so that
	// it can refresh its list viewer on property changes
	private TabContent activeTabContent;

	private ProjectTabContent projectsTabContents;
	private GroupTabContent groupsTabContents;
	private UserTabContent usersTabContents;

	private TabFolder tabFolder;

	/**
	 * Constructor.
	 *
	 * @param parent
	 *            Parent
	 * @param adminBroker
	 *            AdminBorker is responsible for retrieving information from
	 *            server.
	 */
	public OrgUnitManagementGUI(Composite parent, AdminBroker adminBroker) {
		createSash(parent, adminBroker);
	}

	/**
	 * Create the SashForm. On the left hand is a TabFolder with tree tabs, and
	 * on the right hand the properties are shown.
	 *
	 * @param parent
	 */
	private void createSash(Composite parent, AdminBroker adminBroker) {
		final SashForm sash = new SashForm(parent, SWT.HORIZONTAL);
		sash.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

		// ATTENTION: the creation order is important!
		// first create the tab folder, then the form, and then set the TabItems
		// in tab folder.
		// why this order? because
		// 1. tab folder should appear left of form (first control on sash)
		// 2. Tabs shown in TabItems need to be aware of form (first create
		// form, then tabs.)
		createTabFolder(sash);
		final PropertiesForm frm = createPropertiesForm(sash, adminBroker);
		initTabFolder(adminBroker, frm);

		sash.setWeights(sashWeights());
	}

	/**
	 * Create a TabFolder with three tabs for Project, Groups, and Users.
	 *
	 * @param sash
	 */
	private void createTabFolder(SashForm sash) {

		tabFolder = new TabFolder(sash, SWT.NONE);
		tabFolder.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		tabFolder.addSelectionListener(new SelectionListener() {

			public void widgetDefaultSelected(SelectionEvent e) {
				widgetSelected(e);
			}

			public void widgetSelected(SelectionEvent e) {
				switch (tabFolder.getSelectionIndex()) {
				case 0:
					activeTabContent = projectsTabContents;
					break;
				case 1:
					activeTabContent = groupsTabContents;
					break;
				case 2:
					activeTabContent = usersTabContents;
					break;
				default:
					break;
				}
				activeTabContent.selectFirstElement();
				// activeTabContent.getTableViewer().refresh();
			}
		});
	}

	private PropertiesForm createPropertiesForm(SashForm sash, AdminBroker adminBroker) {

		final FormToolkit toolkit = new FormToolkit(sash.getDisplay());

		final PropertiesForm frm = new PropertiesForm(sash, SWT.NONE, adminBroker, this);
		frm.setText(Messages.OrgUnitManagementGUI_Properties);
		frm.setFont(JFaceResources.getHeaderFont());

		toolkit.decorateFormHeading(frm);

		return frm;
	}

	/**
	 * This creates the tabs within tab folder and sets sets AdminBorker and
	 * PropertiesForm for them. Tab items need to be aware of properties form in
	 * order to set its input on double click or do a drag and drop operation.
	 *
	 * @param adminBroker
	 * @param frm
	 */
	private void initTabFolder(AdminBroker adminBroker, PropertiesForm frm) {

		projectsTabContents = new ProjectTabContent("Projects", adminBroker, frm); //$NON-NLS-1$
		groupsTabContents = new GroupTabContent("Groups", adminBroker, frm); //$NON-NLS-1$
		usersTabContents = new UserTabContent("Users", adminBroker, frm); //$NON-NLS-1$

		final TabItem projectsTab = createTab(
			tabFolder,
			projectsTabContents,
			Messages.OrgUnitManagementGUI_Projects);

		createTab(
			tabFolder,
			groupsTabContents,
			Messages.OrgUnitManagementGUI_Groups);

		createTab(
			tabFolder,
			usersTabContents,
			Messages.OrgUnitManagementGUI_Users);

		tabFolder.setSelection(projectsTab);

		// set initial input to properties form
		projectsTabContents.selectFirstElement();
	}

	private TabItem createTab(TabFolder folder, TabContent tabContent, String text) {
		final Composite content = tabContent.createContents(folder);
		final TabItem projectsTab = new TabItem(folder, SWT.NONE);
		projectsTab.setControl(content);
		projectsTab.setText(text);
		return projectsTab;
	}

	private int[] sashWeights() {
		return new int[] { 25, 75 };
	}

	/**
	 * This will be used by GroupComposite and UserComposite. When name of a
	 * group or user is changed, this must be reflected in corresponding tab.
	 * This done by refreshing the ListViewer on a tab.
	 *
	 * @return Active tab of TabFolder
	 */
	public TabContent getActiveTabContent() {
		return activeTabContent;
	}
}