/*

* Copyright (c) 2009 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.cdt.internal.debug.launch.wizard;

import java.util.Iterator;

import java.util.List;

import org.eclipse.core.resources.IProject;

import org.eclipse.core.runtime.IPath;

import org.eclipse.jface.dialogs.Dialog;

import org.eclipse.jface.viewers.DoubleClickEvent;

import org.eclipse.jface.viewers.IDoubleClickListener;

import org.eclipse.jface.viewers.ISelectionChangedListener;

import org.eclipse.jface.viewers.IStructuredContentProvider;

import org.eclipse.jface.viewers.IStructuredSelection;

import org.eclipse.jface.viewers.SelectionChangedEvent;

import org.eclipse.jface.viewers.StructuredSelection;

import org.eclipse.jface.viewers.TableViewer;

import org.eclipse.jface.viewers.Viewer;

import org.eclipse.jface.wizard.Wizard;

import org.eclipse.jface.wizard.WizardSelectionPage;

import org.eclipse.swt.SWT;

import org.eclipse.swt.custom.SashForm;

import org.eclipse.swt.layout.GridData;

import org.eclipse.swt.layout.GridLayout;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.ui.PlatformUI;

class LaunchWizardSelectionPage extends WizardSelectionPage implements ISelectionChangedListener, IStructuredContentProvider {

	private LaunchCreationWizard mainWizard;

	private FormBrowser descriptionBrowser;

	private TableViewer wizardSelectionTableViewer = null;

	private boolean inputChanged = false;

	public LaunchWizardSelectionPage(LaunchCreationWizard mainWizard, List<IPath> mmps, List<IPath> exes, IPath defaultExecutable, IProject project, String configurationName, String mode) throws Exception {

		super(Messages.getString("LaunchWizardSelectionPage.0")); //$NON-NLS-1$

		setTitle(Messages.getString("LaunchWizardSelectionPage.1")); //$NON-NLS-1$

		setDescription(Messages.getString("LaunchWizardSelectionPage.2")); //$NON-NLS-1$

		this.mainWizard = mainWizard;

		descriptionBrowser = new FormBrowser();

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

	}

	public void createDescriptionIn(Composite composite) {

		descriptionBrowser.createControl(composite);

		Control c = descriptionBrowser.getControl();

		c.setData(".uid", "LaunchWizardSelection.descriptionBrowser");

		GridData gd = new GridData(GridData.FILL_BOTH);

		gd.widthHint = 200;

		c.setLayoutData(gd);

	}

	public String getLabel() {

		return Messages.getString("LaunchWizardSelectionPage.4"); //$NON-NLS-1$

	}

	public void setDescriptionText(String text) {

		descriptionBrowser.setText(text);

	}

	public void moveToNextPage() {

		getContainer().showPage(getNextPage());

	}

	public void createControl(Composite parent) {

		Composite container = new Composite(parent, SWT.NONE);

		GridLayout layout = new GridLayout();

		layout.verticalSpacing = 10;

		container.setLayout(layout);

		container.setLayoutData(new GridData(GridData.FILL_BOTH));

		Label label = new Label(container, SWT.NONE);

		label.setText(getLabel());

		GridData gd = new GridData();

		label.setLayoutData(gd);

		label.setData(".uid", "LaunchWizardSelectionPage.label");

		SashForm sashForm = new SashForm(container, SWT.VERTICAL);

		gd = new GridData(GridData.FILL_BOTH);

		gd.widthHint = 300;

		gd.heightHint = 300;

		gd.minimumHeight = 230;

		sashForm.setLayoutData(gd);

		wizardSelectionTableViewer = new TableViewer(sashForm, SWT.BORDER);

		wizardSelectionTableViewer.setContentProvider(this);

		wizardSelectionTableViewer.addDoubleClickListener(new IDoubleClickListener() {

			public void doubleClick(DoubleClickEvent event) {

				selectionChanged(new SelectionChangedEvent(wizardSelectionTableViewer, wizardSelectionTableViewer.getSelection()));

				moveToNextPage();

			}

		});

		wizardSelectionTableViewer.addSelectionChangedListener(this);

		createDescriptionIn(sashForm);

		sashForm.setWeights(new int[] {75, 25});

		Dialog.applyDialogFont(container);

		setControl(container);

		PlatformUI.getWorkbench().getHelpSystem().setHelp(getControl(), LaunchWizardHelpIds.WIZARD_SELECTION_PAGE);

	}

	public TableViewer getViewer() {

		return wizardSelectionTableViewer;

	}

	public void selectionChanged(SelectionChangedEvent event) {

		selectedWizard = null;

		setErrorMessage(null);

		IStructuredSelection selection = (IStructuredSelection) event.getSelection();

		Object selectedObject = null;

		if (iter.hasNext()) {

			selectedObject = iter.next();

		}

		if (selectedWizard == null) {

			setDescriptionText(""); //$NON-NLS-1$

			setSelectedNode(null);

			return;

		}

		setSelectedNode(new WizardNode(this, (Wizard)selectedWizard));

		setDescriptionText(selectedWizard.getDescription());

	}

	public void setVisible(boolean visible) {

		super.setVisible(visible);

		if (visible && wizardSelectionTableViewer != null) {

			if (inputChanged) {

				wizardSelectionTableViewer.setSelection(new StructuredSelection(wizardSelectionTableViewer.getElementAt(0)), true);

			}

			wizardSelectionTableViewer.getTable().setFocus();

		}

	}

	public Object[] getElements(Object inputElement) {

		List<Wizard> wizards = (List<Wizard>)inputElement;

		return wizards.toArray();

	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {

		if (oldInput == null || newInput == null || !oldInput.equals(newInput)) {

			inputChanged = true;

		} else {

			inputChanged = false;

		}

	}

	public ILaunchWizard getSelectedWizard() {

		return selectedWizard;

	}

}