PolygonToLineImages.java

/* Spatial Operations & Editing Tools for uDig
 * 
 * Axios Engineering under a funding contract with: 
 *      Diputación Foral de Gipuzkoa, Ordenación Territorial 
 *
 *      http://b5m.gipuzkoa.net
 *      http://www.axios.es 
 *
 * (C) 2006, Diputación Foral de Gipuzkoa, Ordenación Territorial (DFG-OT). 
 * DFG-OT agrees to licence under Lesser General Public License (LGPL).
 * 
 * You can redistribute it and/or modify it under the terms of the 
 * GNU Lesser General Public License as published by the Free Software 
 * Foundation; version 2.1 of the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 */
package es.axios.udig.spatialoperations.internal.ui.parameters.polygontoline;

import org.eclipse.swt.graphics.Image;

import es.axios.udig.spatialoperations.internal.ui.processconnectors.PolygonToLineCommand;
import es.axios.udig.spatialoperations.ui.parameters.AbstractImagesOperation;
import es.axios.udig.spatialoperations.ui.parameters.ISOCommand;
import es.axios.udig.spatialoperations.ui.parameters.LayersCheckState;

/**
 * A class that stores the different PolygonToLine images and show the
 * correspondent image.
 * 
 * TODO for each option add getters on the command and implement the logical
 * here
 * 
 * @author Aritz Davila (www.axios.es)
 * @author Mauricio Pazos (www.axios.es)
 * @since 1.2.0
 */
final class PolygonToLineImages extends AbstractImagesOperation {

	private static final String		POLYGONTOLINE_SOURCE		= "PolygonToLineSource";		//$NON-NLS-1$
	private static final String		POLYGONTOLINE_RESULT		= "PolygonToLineResult";		//$NON-NLS-1$
	private static final String		POLYGONTOLINE_FINAL			= "PolygonToLineFinal";		//$NON-NLS-1$
	private static final String		POLYGONTOLINE_RESULT_EXP	= "PolygonToLineResultExplode"; //$NON-NLS-1$
	private static final String		POLYGONTOLINE_FINAL_EXP		= "PolygonToLineFinalExplode";	//$NON-NLS-1$

	private Image					currentImage				= null;

	private LayersCheckState		currentState				= null;

	private Boolean					explode						= null;

	/**
	 * 
	 */
	public PolygonToLineImages() {

		super();
		
	}


	@Override
	public Image getImage(Boolean chkSource, Boolean chkResult) {

		this.currentState = (setCurrentLayerCheckState(chkSource, chkResult));

		if (this.currentState == null) {
			// no check selected = no image will display
			return null;
		}

		// TODO implement check for each option, and finally will return the
		// correspondent image.

		switch (this.currentState) {
		case Source:

			this.currentImage = getImage(POLYGONTOLINE_SOURCE);
			break;
		case Result:
			if (checkExplode()) {
				this.currentImage = getImage(POLYGONTOLINE_RESULT_EXP);
			} else {
				this.currentImage = getImage(POLYGONTOLINE_RESULT);
			}
			break;
		case Final:
			if (checkExplode()) {
				this.currentImage = getImage(POLYGONTOLINE_FINAL_EXP);
			} else {
				this.currentImage = getImage(POLYGONTOLINE_FINAL);
			}
			break;
		default:
			assert false : "Error"; //$NON-NLS-1$
			break;
		}

		assert currentImage != null : "currentImage couldn't be null"; //$NON-NLS-1$

		return currentImage;
	}

	/**
	 * Checked if the aggregated is selected.
	 * 
	 * @return True if it's selected
	 */
	private boolean checkExplode() {

		ISOCommand cmd = getCommand();

		this.explode = ((PolygonToLineCommand)cmd).getExplodeOption();

		if (this.explode == null) {
			return false;
		}

		return ( this.explode ) ? true : false;
	}

	@Override
	public Image getDefaultImage() {

		this.currentImage = getImage(POLYGONTOLINE_FINAL);
		return currentImage;
	}

	/**
	 * Creates the imageregistry where saves all the images.
	 * 
	 * @return
	 */
	protected void createImageRegistry() {

		addImageToRegistry(POLYGONTOLINE_SOURCE, PolygonToLineImages.class);
		addImageToRegistry(POLYGONTOLINE_RESULT, PolygonToLineImages.class);
		addImageToRegistry(POLYGONTOLINE_FINAL, PolygonToLineImages.class);
		addImageToRegistry(POLYGONTOLINE_RESULT_EXP, PolygonToLineImages.class);
		addImageToRegistry(POLYGONTOLINE_FINAL_EXP, PolygonToLineImages.class);
	}
}