bundles/addons/org.eclipse.apogy.addons.sensors.imaging.camera/src/org/eclipse/apogy/addons/sensors/imaging/camera/wizards/RescaleFilterWizardPage.java

/*******************************************************************************
 * Copyright (c) 2018 Agence spatiale canadienne / Canadian Space Agency
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     Pierre Allard - initial API and implementation
 *     Regent L'Archeveque
 * 
 * SPDX-License-Identifier: EPL-1.0
 *******************************************************************************/
package org.eclipse.apogy.addons.sensors.imaging.camera.wizards;

import org.eclipse.apogy.addons.sensors.imaging.camera.RescaleFilter;
import org.eclipse.apogy.addons.sensors.imaging.camera.composites.RescaleFilterComposite;
import org.eclipse.core.databinding.DataBindingContext;
import org.eclipse.jface.wizard.WizardPage;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;

public class RescaleFilterWizardPage extends WizardPage {
	private final static String WIZARD_PAGE_ID = "org.eclipse.apogy.addons.sensors.imaging.camera.wizards.RescaleFilterWizardPage";

	private final RescaleFilter rescaleFilter;
	private RescaleFilterComposite rescaleFilterComposite;

	private DataBindingContext m_bindingContext;

	public RescaleFilterWizardPage(RescaleFilter rescaleFilter) {
		super(WIZARD_PAGE_ID);
		this.rescaleFilter = rescaleFilter;

		setTitle("Rescale Filter.");
		setDescription("Select filter settings.");

		validate();
	}

	@Override
	public void createControl(Composite parent) {
		Composite top = new Composite(parent, SWT.None);
		top.setLayout(new GridLayout(1, false));

		this.rescaleFilterComposite = new RescaleFilterComposite(top, SWT.NONE) {
			@Override
			protected void newExposureSelected(double exposure) {
				validate();
			}
		};
		this.rescaleFilterComposite.setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));
		this.rescaleFilterComposite.setRescaleFilter(this.rescaleFilter);

		setControl(top);

		// Bindings
		this.m_bindingContext = initDataBindingsCustom();

		// Dispose
		top.addDisposeListener(new DisposeListener() {
			@Override
			public void widgetDisposed(DisposeEvent e) {
				if (RescaleFilterWizardPage.this.m_bindingContext != null)
					RescaleFilterWizardPage.this.m_bindingContext.dispose();
			}
		});
	}

	protected void validate() {
		setErrorMessage(null);

		if (this.rescaleFilter.getScale() < 0) {
			setErrorMessage("Invalid scale specified ! Must be equal or greater than zero.");
		}

		setPageComplete(getErrorMessage() == null);
	}

	private DataBindingContext initDataBindingsCustom() {
		DataBindingContext bindingContext = new DataBindingContext();

		return bindingContext;
	}
}