/*

* 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.resource.FontDescriptor;

import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.CLabel;

import org.eclipse.swt.events.MouseAdapter;

import org.eclipse.swt.events.MouseEvent;

import org.eclipse.swt.events.MouseListener;

import org.eclipse.swt.events.MouseTrackAdapter;

import org.eclipse.swt.events.MouseTrackListener;

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.layout.FillLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Event;

import com.nokia.cpp.internal.api.utils.core.ListenerList;

class NavigationBar extends RoundedCornerComposite {

	private class Button extends CLabel {

		private ListenerList<SelectionListener> listeners;

		private boolean selection;

		private MouseTrackListener mouseTrackListener;

		private MouseListener mouseListener;

		public Button(Composite parent) {

			super(parent, SWT.CENTER);

			listeners = new ListenerList<SelectionListener>();

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

			addMouseTrackListener(mouseTrackListener = new MouseTrackAdapter() {

				@Override

				public void mouseExit(MouseEvent e) {

					if (!selection)

						setBackgroundColor();

				}

				@Override

				public void mouseEnter(MouseEvent e) {

					if (!selection)

						setBackground(getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));

				}

			});

			addMouseListener(mouseListener = new MouseAdapter() {

				@Override

				public void mouseUp(MouseEvent e) {

				}

			});

		}

		@Override

		protected void checkSubclass() {

		}

		public void addSelectionListener(SelectionListener listener) {

			listeners.add(listener);

		}

		public void setSelection(boolean selection) {

			if (this.selection != selection) {

				this.selection = selection;

				setBackgroundColor();

				if (selection) {

					for (Control control : getParent().getChildren()) {

						if (control instanceof Button) {

							if (!control.equals(this)) {

								((Button) control).setSelection(false);

							}

						}

					}

					fireSelection();

				}

			}

		}

		private void fireSelection() {

			Event e = new Event();

			e.widget = this;

			e.display = getDisplay();

			for (SelectionListener listener : listeners) {

				listener.widgetSelected(new SelectionEvent(e));

			}

		}

		private void setBackgroundColor() {

			setBackground(getDisplay().getSystemColor(selection ? SWT.COLOR_WIDGET_NORMAL_SHADOW : SWT.COLOR_WHITE));

		}

		@Override

		public void dispose() {

			removeMouseTrackListener(mouseTrackListener);

			removeMouseListener(mouseListener);

			super.dispose();

		}

	}

	private final class ButtonListener extends SelectionAdapter {

		@Override

		public void widgetSelected(SelectionEvent e) {

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

			selectNavButton(button);

		}

	}

	private static final int BUTTON_SPACING = 0;

	private PortalEditor portalEditor;

	private Map<Button, PortalPage> buttonToPageMap;

	private SelectionListener listener;

	private Font buttonFont;

	private Font selectedButtonFont;

	NavigationBar(PortalEditor portalEditor, Composite parent) {

		super(parent, portalEditor.getBackgroundParent(), null, null);

		this.portalEditor = portalEditor;

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

		FillLayout layout = new FillLayout(SWT.HORIZONTAL);

		layout.spacing = BUTTON_SPACING;

		layout.marginHeight = BUTTON_SPACING;

		layout.marginWidth = BUTTON_SPACING;

		setLayout(layout);

		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;

		buttonToPageMap.keySet().iterator().next().setSelection(true);

	}

	public void addNavButton(NavigationBar bar, PortalPage page) {

		Button b = new Button(bar);

		b.setFont(buttonFont);

		b.setText(page.getTitle());

		b.setToolTipText(page.getTooltip());

		b.setImage(portalEditor.createImage(page.getImageDescriptor(), 32, 32));

		b.addSelectionListener(listener);

		buttonToPageMap.put(b, page);

	}

	public void selectNavButton(Button button) {

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

		button.setFont(selectedButtonFont);

		layout();

	}

}