/*

 * Copyright (c) 2007-2010 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:

 *

 * Component / Group selection dialog

 *

 */

package com.nokia.traceviewer.dialog;

import java.util.ArrayList;

import java.util.List;

import org.eclipse.swt.SWT;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Table;

import org.eclipse.swt.widgets.TableColumn;

import org.eclipse.swt.widgets.TableItem;

import org.eclipse.ui.PlatformUI;

import com.nokia.traceviewer.engine.TraceViewerGlobals;

import com.nokia.traceviewer.engine.activation.TraceActivationComponentItem;

import com.nokia.traceviewer.engine.activation.TraceActivationGroupItem;

/**

 * Component / Group selection dialog

 * 

 */

public final class ComponentSelectionDialog extends BaseDialog {

	/**

	 * Hex prefix

	 */

	private static final String HEX_PREFIX = "0x"; //$NON-NLS-1$

	/**

	 * Group column text

	 */

	private static final String GROUP_COLUMN_TEXT = Messages

			.getString("ComponentSelectionDialog.GroupColumnText"); //$NON-NLS-1$

	/**

	 * Component column text

	 */

	private static final String COMPONENT_COLUMN_TEXT = Messages

			.getString("ComponentSelectionDialog.ComponentColumnText"); //$NON-NLS-1$

	/**

	 * Group shell text

	 */

	private static final String GROUP_SHELL_TEXT = Messages

			.getString("ComponentSelectionDialog.GroupShellText"); //$NON-NLS-1$

	/**

	 * Component shell text

	 */

	private static final String COMPONENT_SHELL_TEXT = Messages

			.getString("ComponentSelectionDialog.ComponentShellText"); //$NON-NLS-1$

	/**

	 * Table where components / groups are shown

	 */

	private Table table;

	/**

	 * Name column for table

	 */

	private TableColumn nameColumn;

	/**

	 * ID column for table

	 */

	private TableColumn idColumn;

	/**

	 * Indicates that should dialog show components or groups

	 */

	private boolean isShowingComponents = true;

	/**

	 * If dialog is showing groups, show them from this component ID

	 */

	private int componentId;

	/**

	 * Selected item ID that can be asked after dialog is closed

	 */

	private String selectedItemId;

	/**

	 * Selected item name that can be asked after dialog is closed

	 */

	private String selectedItemName;

	/**

	 * Constructor

	 */

	public ComponentSelectionDialog() {

		// Pass the default styles here

		super(PlatformUI.getWorkbench().getDisplay().getActiveShell(),

				SWT.DIALOG_TRIM | SWT.RESIZE | SWT.SYSTEM_MODAL);

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.traceviewer.dialog.BaseDialog#createDialogContents()

	 */

	@Override

	protected void createDialogContents() {

		// Shell

		GridLayout shellGridLayout = new GridLayout();

		shellGridLayout.numColumns = 3;

		if (isShowingComponents) {

			getShell().setText(COMPONENT_SHELL_TEXT);

		} else {

			getShell().setText(GROUP_SHELL_TEXT);

		}

		composite.setLayout(shellGridLayout);

		// Table

		GridData listGridData = new GridData();

		listGridData.horizontalAlignment = GridData.FILL;

		listGridData.grabExcessHorizontalSpace = true;

		listGridData.grabExcessVerticalSpace = true;

		listGridData.horizontalSpan = 3;

		listGridData.verticalAlignment = GridData.FILL;

		listGridData.heightHint = 400;

		listGridData.widthHint = 300;

		table = new Table(composite, SWT.BORDER | SWT.FULL_SELECTION);

		table.setHeaderVisible(true);

		table.setLayoutData(listGridData);

		// Table columns

		nameColumn = new TableColumn(table, SWT.NONE);

		if (isShowingComponents) {

			nameColumn.setText(COMPONENT_COLUMN_TEXT);

		} else {

			nameColumn.setText(GROUP_COLUMN_TEXT);

		}

		idColumn = new TableColumn(table, SWT.NONE);

		idColumn.setText("ID"); //$NON-NLS-1$

		// Spacer

		GridData spacerGridData = new GridData();

		spacerGridData.horizontalAlignment = GridData.BEGINNING;

		spacerGridData.grabExcessHorizontalSpace = true;

		spacerGridData.verticalAlignment = GridData.CENTER;

		Label spacerLabel = new Label(composite, SWT.NONE);

		spacerLabel.setText(""); //$NON-NLS-1$

		spacerLabel.setLayoutData(spacerGridData);

		// Fill table

		if (TraceViewerGlobals.getDecodeProvider() != null) {

			fillTable();

		}

	}

	/**

	 * Fills table from decode provider

	 */

	private void fillTable() {

		List<TraceActivationComponentItem> components = TraceViewerGlobals

				.getDecodeProvider().getActivationInformation(false);

		// Show components

		if (isShowingComponents) {

			for (int i = 0; i < components.size(); i++) {

				TableItem item = new TableItem(table, SWT.NONE);

				String id = HEX_PREFIX

						+ Integer.toHexString(components.get(i).getId());

				item.setText(new String[] { components.get(i).getName(), id });

			}

			// Show groups

		} else {

			// Component is defined, show groups from that component only

			if (componentId != NOT_DEFINED) {

				TraceActivationComponentItem component = null;

				// Find the right component

				for (int i = 0; i < components.size(); i++) {

					if (components.get(i).getId() == componentId) {

						component = components.get(i);

						break;

					}

				}

				if (component != null) {

					// Print the groups from the component

					for (int i = 0; i < component.getGroups().size(); i++) {

						TraceActivationGroupItem group = component.getGroups()

								.get(i);

						TableItem item = new TableItem(table, SWT.NONE);

						String id = HEX_PREFIX

								+ Integer.toHexString(group.getId());

						item.setText(new String[] { group.getName(), id });

					}

				}

				// Component is not defined, show all groups

			} else {

				// Put all groups to one arraylist

				ArrayList<TraceActivationGroupItem> allGroups = new ArrayList<TraceActivationGroupItem>();

				// Loop through components

				for (int i = 0; i < components.size(); i++) {

					allGroups.addAll(components.get(i).getGroups());

				}

				// Create listitems from the list

				for (int i = 0; i < allGroups.size(); i++) {

					TableItem item = new TableItem(table, SWT.NONE);

					String id = HEX_PREFIX

							+ Integer.toHexString(allGroups.get(i).getId());

					item

							.setText(new String[] { allGroups.get(i).getName(),

									id });

				}

			}

		}

		nameColumn.pack();

		idColumn.pack();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see org.eclipse.jface.dialogs.Dialog#okPressed()

	 */

	@Override

	protected void okPressed() {

		TableItem[] selection = table.getSelection();

		if (selection.length > 0) {

			try {

				// Get the ID

				selectedItemId = selection[0].getText(1);

			} catch (NumberFormatException e) {

				selectedItemId = ""; //$NON-NLS-1$

			}

			// Get the name

			selectedItemName = selection[0].getText(0);

		} else {

			selectedItemId = ""; //$NON-NLS-1$

			selectedItemName = ""; //$NON-NLS-1$

		}

		super.okPressed();

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see org.eclipse.jface.dialogs.Dialog#cancelPressed()

	 */

	@Override

	protected void cancelPressed() {

		selectedItemId = ""; //$NON-NLS-1$

		selectedItemName = ""; //$NON-NLS-1$

		super.cancelPressed();

	}

	/**

	 * Gets the selected item ID as a hex String

	 * 

	 * @return the selectedItemId

	 */

	public String getSelectedItemId() {

		return selectedItemId;

	}

	/**

	 * Gets selected item name

	 * 

	 * @return the selectedItemName

	 */

	public String getSelectedItemName() {

		return selectedItemName;

	}

	/**

	 * Sets dialog to show either components or groups

	 * 

	 * @param showComponents

	 *            if true, dialog shows components

	 * @param componentId

	 *            if showing groups, show them only from this component

	 */

	public void setDialogToShowComponents(boolean showComponents,

			int componentId) {

		// Remove old items

		if (table != null && !table.isDisposed()) {

			table.removeAll();

		}

		isShowingComponents = showComponents;

		if (!showComponents) {

			this.componentId = componentId;

		} else {

			this.componentId = NOT_DEFINED;

		}

	}

	/*

	 * (non-Javadoc)

	 * 

	 * @see com.nokia.traceviewer.dialog.BaseDialog#createActionListeners()

	 */

	@Override

	protected void createActionListeners() {

		// No need for action listeners in this dialog

	}

}