/*******************************************************************************
 * Copyright (c) 2004, 2005 Sybase, Inc. and others.
 *
 * 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:
 *     Sybase, Inc. - initial API and implementation
 *******************************************************************************/
package org.eclipse.jst.jsf.facesconfig.ui.page;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jst.jsf.facesconfig.emf.FacesConfigType;
import org.eclipse.jst.jsf.facesconfig.ui.EditorPlugin;
import org.eclipse.jst.jsf.facesconfig.ui.FacesConfigEditor;
import org.eclipse.jst.jsf.facesconfig.ui.EditorMessages;
import org.eclipse.jst.jsf.facesconfig.ui.section.OverviewComponentsSection;
import org.eclipse.jst.jsf.facesconfig.ui.section.OverviewGeneralSection;
import org.eclipse.jst.jsf.facesconfig.ui.section.OverviewManagedBeanSection;
import org.eclipse.jst.jsf.facesconfig.ui.section.OverviewNavigationSection;
import org.eclipse.jst.jsf.facesconfig.ui.section.OverviewOthersSection;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.forms.IManagedForm;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.forms.editor.FormPage;
import org.eclipse.ui.forms.widgets.FormToolkit;
import org.eclipse.ui.forms.widgets.ScrolledForm;

/**
 * @author jchoi, Xiao-guang Zhang
 * @version
 */
public class OverviewPage extends FormPage implements ISelectionProvider,
		IFacesConfigPage {


    /**
     * The id of this page in the faces-config editor.
     */
	public static final String PAGE_ID = "org.eclipse.jst.jsf.facesconfig.ui.page.OverviewPage"; //$NON-NLS-1$
	
	private static final int LAYOUT_MARGIN_HEIGHT = 2;

	private static final int LAYOUT_MARGIN_WIDTH = 2;

	private Object input;

	private OverviewGeneralSection generalSection;

	private OverviewManagedBeanSection beanSection;

	private OverviewComponentsSection componentsSection;

	//
	private OverviewNavigationSection navigationSection;

	//
	private OverviewOthersSection otherSection;

	/**
	 * 
	 * @param editor
	 */
	public OverviewPage(FormEditor editor) {
		super(editor, "OverviewPage", EditorMessages.OverviewPage_page_name); //$NON-NLS-1$
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.FormPage#createFormContent(org.eclipse.ui.forms.IManagedForm)
	 */
	protected void createFormContent(IManagedForm managedForm) {

		ScrolledForm form = managedForm.getForm();
		form.setText(EditorMessages.OverviewPage_PageflowOverview_summary);
		form.setBackgroundImage(EditorPlugin.getDefault().getImage(
				"form_banner.gif")); //$NON-NLS-1$
		Composite body = form.getBody();
		GridLayout gridLayout = new GridLayout();
		gridLayout.marginWidth = LAYOUT_MARGIN_WIDTH;
		gridLayout.marginHeight = LAYOUT_MARGIN_HEIGHT;
		body.setLayout(gridLayout);
		gridLayout = new GridLayout(2, true);
		form.getBody().setLayout(gridLayout);
		FormEditor editor = getEditor();
		FormToolkit toolkit = editor.getToolkit();

		// add overview general information
		generalSection = new OverviewGeneralSection(managedForm.getForm()
				.getBody(), managedForm, this, toolkit);
		generalSection.initialize();
		GridData gd = new GridData(GridData.FILL_HORIZONTAL);
		gd.horizontalSpan = 2;
		generalSection.getSection().setLayoutData(gd);

		// Navigation section
		navigationSection = new OverviewNavigationSection(managedForm.getForm()
				.getBody(), managedForm, this, toolkit);
		navigationSection.initialize();
		gd = new GridData(GridData.FILL_BOTH);
		navigationSection.getSection().setLayoutData(gd);
		navigationSection.getSection().setExpanded(true);

		// ManagedBeans section
		beanSection = new OverviewManagedBeanSection(managedForm.getForm()
				.getBody(), managedForm, this, toolkit);
		beanSection.initialize();
		gd = new GridData(GridData.FILL_BOTH);
		beanSection.getSection().setLayoutData(gd);
		beanSection.getSection().setExpanded(true);

		/* components section */
		componentsSection = new OverviewComponentsSection(managedForm.getForm()
				.getBody(), managedForm, this, toolkit);
		componentsSection.initialize();
		gd = new GridData(GridData.FILL_BOTH);
		componentsSection.getSection().setLayoutData(gd);
		componentsSection.getSection().setExpanded(true);

		/* other sections */
		otherSection = new OverviewOthersSection(managedForm.getForm()
				.getBody(), managedForm, this, toolkit);
		otherSection.initialize();
		gd = new GridData(GridData.FILL_BOTH);
		otherSection.getSection().setLayoutData(gd);
		otherSection.getSection().setExpanded(true);

		this.getSite().setSelectionProvider(this);

	}

	/**
	 * set input for this page when the it got activated at the first time; if
	 * it's not the first time, then refresh the page.
	 * 
	 * @see org.eclipse.ui.forms.editor.FormPage#setActive(boolean)
	 */
	public void setActive(boolean active) {
		super.setActive(active);
		if (active) {
			if (getInput() != ((FacesConfigEditor) getEditor())
					.getFacesConfig()) {
				setInput(((FacesConfigEditor) getEditor()).getFacesConfig());
			} else {
				this.refresh();
			}
		}
	}

	/**
	 * 
	 */
	public void setInput(Object input) {
		if (input instanceof FacesConfigType) {
			this.input = input;
			navigationSection.setInput(input);
			beanSection.setInput(input);
			componentsSection.setInput(input);
			otherSection.setInput(input);
		}
	}

	/**
	 * Call refreshAll on all sections on this page
	 */
	public void refreshAll() {
		generalSection.refreshAll();
		navigationSection.refreshAll();
		beanSection.refreshAll();
		componentsSection.refreshAll();
		otherSection.refreshAll();
	}

	public Object getInput() {
		return input;
	}

	public void refresh() {
		generalSection.refresh();
		navigationSection.refresh();
		beanSection.refresh();
		componentsSection.refresh();
		otherSection.refresh();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.forms.editor.IFormPage#isEditor()
	 */
	public boolean isEditor() {
		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
	 */
	public void addSelectionChangedListener(ISelectionChangedListener listener) {
        // do not support change in selection
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
	 */
	public ISelection getSelection() {
		return StructuredSelection.EMPTY;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
	 */
	public void removeSelectionChangedListener(
			ISelectionChangedListener listener) {
        // do not support change in selection
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
	 */
	public void setSelection(ISelection selection) {
	    // do not support change in selection
	}
	
	public void dispose() {
		beanSection.dispose();
		componentsSection.dispose();
		generalSection.dispose();
		navigationSection.dispose();
		otherSection.dispose();
		super.dispose();
	}
}