/*

 * 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.cdt.internal.debug.launch.newwizard;

import java.text.MessageFormat;

import org.eclipse.core.runtime.IStatus;

import org.eclipse.core.runtime.Status;

import org.eclipse.jface.layout.GridDataFactory;

import org.eclipse.jface.layout.GridLayoutFactory;

import org.eclipse.jface.resource.JFaceResources;

import org.eclipse.jface.window.Window;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.ControlAdapter;

import org.eclipse.swt.events.ControlEvent;

import org.eclipse.swt.events.DisposeEvent;

import org.eclipse.swt.events.DisposeListener;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.GC;

import org.eclipse.swt.graphics.Point;

import org.eclipse.swt.widgets.Button;

import org.eclipse.swt.widgets.Composite;

import org.eclipse.swt.widgets.Control;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import com.nokia.cdt.internal.debug.launch.LaunchPlugin;

/**

 * 

 */

public abstract class AbstractLaunchWizardSection implements IWizardSection {

	private static final String CHANGE_LABEL = "Change...";

	protected final LaunchWizardData data;

	private String sectionName;

	protected IStatus status;

	protected Label descriptionLabel;

	protected Button changeButton;

	protected Composite control;

	private ISectionChangeListener changeListener;

	public AbstractLaunchWizardSection(LaunchWizardData data, String sectionName) {

		this.data = data;

		this.sectionName = sectionName;

		status = Status.OK_STATUS;

	}

	abstract protected void dispose();

	public IStatus getStatus() {

		return status;

	}

	/** Initialize the data for this section (before UI shown). */

	public abstract void initializeSettings();

	/** Validate the settings and update status. */

	abstract protected void validate();

	/** Update the UI when data changes. Called after validate(). */

	protected abstract void updateUI();

	/** Create the UI for this section. */

	public abstract void createControl(Composite parent);

	/** Create the dialog for the Change... button. */

	protected abstract AbstractLaunchSettingsDialog createChangeSettingsDialog(Shell shell, LaunchWizardData dialogData);

	/** Refresh the section after the Change... dialog has been closed. */

	protected abstract void refresh();

	public Control getControl() {

		return control; 

	}

	public String getSectionName() {

		return sectionName;

	}

	/* (non-Javadoc)

	 * @see com.nokia.cdt.internal.debug.launch.wizard2.IWizardSection#setChangeListener(com.nokia.cdt.internal.debug.launch.wizard2.IWizardSection.ISectionChangeListener)

	 */

	public void setChangeListener(ISectionChangeListener listener) {

		this.changeListener = listener;

	}

	protected void createSection(Composite parent, int acceleratorIndex) {

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

		GC gc = new GC(parent);

		int INDENT = gc.getAdvanceWidth('m') * 4;

		gc.dispose();

		GridLayoutFactory.fillDefaults().numColumns(2).margins(6, 0).applyTo(composite);

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

		titleLabel.setText(sectionName);

		titleLabel.setFont(JFaceResources.getBannerFont());

		GridDataFactory.fillDefaults().grab(true, false).span(2, 1).applyTo(titleLabel);

		// spacing

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

		GridDataFactory.fillDefaults().grab(true, false).span(2, 1).applyTo(spacer);

		descriptionLabel = new Label(composite, SWT.WRAP);

		GridDataFactory.fillDefaults().grab(true, true).indent(INDENT, 0).applyTo(descriptionLabel);

		String label = MessageFormat.format("{0}&{1}", //$NON-NLS-1$

				CHANGE_LABEL.substring(0, acceleratorIndex), CHANGE_LABEL.substring(acceleratorIndex));

		changeButton = new Button(composite, SWT.PUSH);

		changeButton.setText(label);

		Point minSize = changeButton.computeSize(SWT.DEFAULT, SWT.DEFAULT, true);

		GridDataFactory.defaultsFor(changeButton).grab(false, false).hint(minSize.x + INDENT, SWT.DEFAULT).applyTo(changeButton);

		changeButton.addSelectionListener(new SelectionAdapter() {

			@Override

			public void widgetSelected(SelectionEvent e) {

				doChange();

				if (changeListener != null)

					changeListener.changed();

			}

		});

		composite.addControlListener(new ControlAdapter() {

			@Override

			public void controlResized(ControlEvent e) {

				descriptionLabel.pack();

			}

		});

		this.control = composite;

		control.addDisposeListener(new DisposeListener() {

			public void widgetDisposed(DisposeEvent e) {

				dispose();

			}

		});

		validate();

		updateUI();

	}

	/* (non-Javadoc)

	 * @see com.nokia.cdt.internal.debug.launch.wizard2.AbstractLaunchWizardSection#doChange()

	 */

	protected void doChange() {

		LaunchWizardData dialogData = data.copy();

		AbstractLaunchSettingsDialog dialog = createChangeSettingsDialog(getControl().getShell(), dialogData);

		if (dialog.open() == Window.OK) {

			data.apply(dialogData);

			refresh();

		}

	}

	protected static IStatus error(String msg, Object... args) {

		return new Status(IStatus.ERROR, LaunchPlugin.PLUGIN_ID,

				MessageFormat.format(msg, args));

	}

	protected IStatus warning(String msg, Object... args) {

		return new Status(IStatus.WARNING, LaunchPlugin.PLUGIN_ID,

				MessageFormat.format(msg, args));

	}

}