/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description: 

*

*/

package com.nokia.carbide.internal.discovery.ui.editor;

import java.util.LinkedHashMap;

import java.util.Map;

import org.eclipse.jface.layout.RowDataFactory;

import org.eclipse.jface.layout.RowLayoutFactory;

import org.eclipse.jface.resource.FontDescriptor;

import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.graphics.Font;

import org.eclipse.swt.graphics.FontData;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import com.nokia.carbide.internal.discovery.ui.extension.IPortalPage;

class NavigationBar extends RoundedCornerComposite {

	private PortalEditor portalEditor;

	private final class ButtonListener extends SelectionAdapter {

		@Override

		public void widgetSelected(SelectionEvent e) {

			Button button = (Button) e.getSource();

			selectNavButton(button);

		}

	}

	private Map<Button, IPortalPage> buttonToPageMap;

	private SelectionListener listener;

	private Font buttonFont;

	private Font selectedButtonFont;

	NavigationBar(PortalEditor portalEditor, Composite parent) {

		super(parent, portalEditor.getBackgroundParent(), 

				parent.getDisplay().getSystemColor(SWT.COLOR_BLACK),

				parent.getDisplay().getSystemColor(SWT.COLOR_WHITE));

		this.portalEditor = portalEditor;

		buttonToPageMap = new LinkedHashMap<Button, IPortalPage>();

		RowLayoutFactory.swtDefaults().margins(3, 3).wrap(false).applyTo(this);

		listener = new ButtonListener();

		selectedButtonFont = JFaceResources.getHeaderFont();

		FontData[] fontData = selectedButtonFont.getFontData();

		for (FontData fd : fontData) {

			fd.setStyle(SWT.NORMAL);

		}

		FontDescriptor desc = FontDescriptor.createFrom(fontData);

		buttonFont = portalEditor.createFont(desc);

	}

	public void initUI() {

		if (buttonToPageMap.isEmpty())

			return;

		selectNavButton(buttonToPageMap.keySet().iterator().next());

	}

	public void addNavButton(NavigationBar bar, IPortalPage page) {

		Button b = new Button(bar, SWT.TOGGLE | SWT.FLAT);

		b.setFont(buttonFont);

		b.setText(page.getText());

		b.setImage(portalEditor.createImage(page.getImageDescriptor(), 16, 16));

		b.addSelectionListener(listener);

		RowDataFactory.swtDefaults().applyTo(b);

		buttonToPageMap.put(b, page);

	}

	public void selectNavButton(Button button) {

		for (Button other : buttonToPageMap.keySet()) {

			other.setSelection(false);

			other.setFont(buttonFont);

		}

		button.setSelection(true);

		portalEditor.showPage(buttonToPageMap.get(button));

		button.setFont(selectedButtonFont);

		layout();

	}

	@Override

	public void layout() {

		super.layout();

		pack();

	}

}