/*

 * Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "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:  Definitions for the class ChartContainer

 *

 */

package com.nokia.s60tools.analyzetool.internal.ui.graph;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.runtime.IProgressMonitor;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.draw2d.ColorConstants;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ControlAdapter;

import org.eclipse.swt.events.ControlEvent;

import org.eclipse.swt.events.PaintEvent;

import org.eclipse.swt.events.PaintListener;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.events.SelectionListener;

import org.eclipse.swt.graphics.Color;

import org.eclipse.swt.graphics.RGB;

import org.eclipse.swt.layout.FormAttachment;

import org.eclipse.swt.layout.FormData;

import org.eclipse.swt.layout.FormLayout;

import org.eclipse.swt.widgets.Combo;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Display;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.ToolBar;

import org.eclipse.swt.widgets.ToolItem;

import org.eclipse.ui.PartInitException;

import org.eclipse.ui.PlatformUI;

import org.eclipse.ui.progress.UIJob;

import com.nokia.s60tools.analyzetool.Activator;

import com.nokia.s60tools.analyzetool.AnalyzeToolHelpContextIDs;

import com.nokia.s60tools.analyzetool.engine.IMemoryActivityModel;

import com.nokia.s60tools.analyzetool.engine.IMemoryActivityModelChangeListener;

import com.nokia.s60tools.analyzetool.engine.statistic.ProcessInfo;

/**

 *  Container for the complete AnalyzeTool chart (x and y axis as well as graph)

 *

 */

public class ChartContainer extends Composite implements IMemoryActivityModelChangeListener{

	private static final String ICON_PROPVIEW = "icons/properties.gif";//$NON-NLS-1$

	private static final String ICON_HELP = "icons/linkto_help.gif";//$NON-NLS-1$

	private AnalyzeToolGraph graphCanvas;

	private YAxis yAxis;

	private Combo processCombo;

	private IMemoryActivityModel model;

	private UIJob iRefreshUIJob;

	/**

	 * Constructor

	 * 

	 * @param parent

	 *            a widget which will be the parent of the new instance (cannot

	 *            be null)

	 * @param style

	 *            the style of widget to construct

	 */

	public ChartContainer(Composite parent, int style) {

		super(parent, SWT.NONE);

		setBackground(parent.getBackground());

		constructChartArea();

	}

	/**

	 * Builds up the main composite when opening for the first time

	 */

	private void constructChartArea(){

		setLayout(new FormLayout());

		Label processLabel = new Label(this, SWT.CENTER);

		processLabel.setText("Process:");

		processCombo = new Combo(this, SWT.READ_ONLY | SWT.DROP_DOWN);

		ToolBar toolBar = new ToolBar (this, SWT.RIGHT | SWT.FLAT);

		//toolbar button to open the Eclipse Properties view

		ToolItem propViewItem = new ToolItem (toolBar, SWT.PUSH | SWT.FLAT );

		propViewItem.addSelectionListener(new SelectionListener(){

			public void widgetDefaultSelected(SelectionEvent e) {

			}

			public void widgetSelected(SelectionEvent e) {

                try {

                    PlatformUI.getWorkbench()

                    .getActiveWorkbenchWindow().getActivePage()

                    .showView("org.eclipse.ui.views.PropertySheet");//$NON-NLS-1$

            } catch (PartInitException ex) {

                    Activator.getDefault().log(IStatus.ERROR, ex.getMessage(), ex);

            }

			}

		});

		propViewItem.setImage(Activator.getDefault().getImage(ICON_PROPVIEW));

		propViewItem.setToolTipText("Show Properties View");

		//toolbar button to show some navigation help and open the F1 help

		ToolItem helpItem = new ToolItem (toolBar, SWT.PUSH | SWT.FLAT );

		helpItem.addSelectionListener(new SelectionListener(){

			public void widgetDefaultSelected(SelectionEvent e) {

			}

			public void widgetSelected(SelectionEvent e) {

				PlatformUI.getWorkbench().getHelpSystem().displayHelp(AnalyzeToolHelpContextIDs.ANALYZE_GRAPH);

			}

		});

		helpItem.setImage(Activator.getDefault().getImage(ICON_HELP));

		helpItem.setToolTipText("Quick navigtion help\n-------------------------\nZoom in: select a region of the graph (mouse left-click and drag).\nZoom out: mouse right-click.\n\nSelect memory operation: mouse left-click in the graph.\nMove selection to next or previous using arrow left and arrow right keys.\n\nFor more help press F1");

		yAxis = new YAxis(this);

		yAxis.createContent();

		graphCanvas = new AnalyzeToolGraph(this);

		graphCanvas.setSize(500, 450);

		FormData formData = new FormData();

		formData.top = new FormAttachment(0,2);

		formData.left   = new FormAttachment(0, 2);

		formData.height = processCombo.getBounds().height;

		processLabel.setLayoutData(formData);

		formData = new FormData();

		formData.top = new FormAttachment(0);

		formData.left   = new FormAttachment(processLabel, 10, SWT.BOTTOM);

		processCombo.setLayoutData(formData);

		formData = new FormData();

		formData.top = new FormAttachment(0, 2);

		formData.right   = new FormAttachment(100, 2);

		toolBar.setLayoutData(formData);

		formData = new FormData();

		formData.top = new FormAttachment(processCombo, 5, SWT.BOTTOM);

		formData.bottom = new FormAttachment(100);

		formData.left   = new FormAttachment(0);

		formData.width  = 60;

		yAxis.setLayoutData(formData);

		formData = new FormData();

		formData.top = new FormAttachment(processCombo, 5, SWT.BOTTOM);

		formData.bottom = new FormAttachment(100);

		formData.left   = new FormAttachment(yAxis, 0, SWT.RIGHT);

		formData.right  = new FormAttachment(100);

		graphCanvas.setLayoutData(formData);

		yAxis.setBackground(ColorConstants.white);

		yAxis.addPaintListener(new PaintListener()

		{

			public void paintControl(PaintEvent event) {

				if(yAxis != null)

					yAxis.paintYAxis(event.gc);

			}		

		});

		graphCanvas.setBackground(new Color(Display.getDefault(), new RGB(255,255,255)));

		graphCanvas.createContent();

		graphCanvas.addControlListener(new ControlAdapter() {

			public void controlResized(ControlEvent e) {

				//the client area of the graph panel might change if a scrollbar gets added/removed 

				//this needs to be passed on to the y axis

				if (yAxis.getHeight() !=  graphCanvas.getClientArea().height){

					yAxis.setHeight(graphCanvas.getClientArea().height);

					yAxis.redraw();

				}

			}

		});

		iRefreshUIJob = new UIJob("Updating process combo box"){

			@Override

			public IStatus runInUIThread(IProgressMonitor arg0) {

				processCombo.removeAll();

				// Update combo box

				if (model.getProcesses().size() == 0){

					processCombo.add("No data available");

					processCombo.select(0);

				} else {

					for (ProcessInfo p : model.getProcesses()) {

						processCombo.add(String.format("%s with %d leak(s)",p.getProcessName() != null ? p.getProcessName() : p.getProcessID(), p.getMemLeaksNumber()));

					}

					processCombo.setVisibleItemCount(10);

				}

				processCombo.pack();

				return Status.OK_STATUS;

			}

		};

		iRefreshUIJob.setSystem(true);

		processCombo.addSelectionListener(new SelectionListener(){

			public void widgetDefaultSelected(SelectionEvent e) {}

			public void widgetSelected(SelectionEvent e) {

				int sel = processCombo.getSelectionIndex();

				if (model.getProcesses().size()>sel){

					ProcessInfo process = model.getProcesses().get(processCombo.getSelectionIndex());

					model.setSelectedProcess(process);

					processCombo.setSize(processCombo.computeSize(SWT.DEFAULT, SWT.DEFAULT));

				}

			}

		});

		layout();

		PlatformUI.getWorkbench().getHelpSystem().setHelp(

				this,

				AnalyzeToolHelpContextIDs.ANALYZE_GRAPH);

	}

	/**

	 * Sets a new model. Note the redraw of the new content only happens on 

	 * callbacks to model change listeners.

	 * @param aProject The currently selected project in the IDE, used for pinpointing

	 * 

	 * @param model the new IMemoryActivityModel to set

	 */

	public void setInput(IProject aProject, IMemoryActivityModel model) {

		if (this.model != null){

			this.model.removeListener(this);

		}

		this.model = model;

		this.model.addListener(this);

		graphCanvas.setInput(model);

		yAxis.setInput(model);

		if (aProject != null) {

			graphCanvas.setProject(aProject);

		}

	}

	/* (non-Javadoc)

	 * @see com.nokia.s60tools.analyzetool.engine.IMemoryActivityModelChangeListener#onProcessSelected(com.nokia.s60tools.analyzetool.engine.statistic.ProcessInfo)

	 */

	public void onProcessSelected(ProcessInfo p) {

	}

	/* (non-Javadoc)

	 * @see com.nokia.s60tools.analyzetool.engine.IMemoryActivityModelChangeListener#onProcessesAdded()

	 */

	public void onProcessesAdded() {

		iRefreshUIJob.cancel();

		iRefreshUIJob.schedule();

	}	

	public void update(){

		graphCanvas.zoomGraph();

		graphCanvas.redraw();

		yAxis.redraw();

	}

}