StylePreferences.java

/*
 * Copyright (c) 2012 Data Harmonisation Panel
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     HUMBOLDT EU Integrated Project #030962
 *     Data Harmonisation Panel <http://www.dhpanel.eu>
 */

package eu.esdihumboldt.hale.ui.style.service.internal;

import java.awt.Color;
import java.util.HashSet;
import java.util.Set;

import org.eclipse.core.runtime.preferences.AbstractPreferenceInitializer;
import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.resource.DataFormatException;
import org.eclipse.jface.resource.StringConverter;
import org.eclipse.swt.graphics.RGB;

import eu.esdihumboldt.hale.common.instance.model.DataSet;
import eu.esdihumboldt.hale.ui.style.internal.InstanceStylePlugin;
import eu.esdihumboldt.hale.ui.util.swing.SwingRcpUtilities;

/**
 * Style perferences
 * 
 * @author Simon Templer
 * @partner 01 / Fraunhofer Institute for Computer Graphics Research
 */
public class StylePreferences extends AbstractPreferenceInitializer implements
		StylePreferenceConstants {

	private static final RGB SOURCE_DEFAULT_COLOR = new RGB(57, 75, 95);

	private static final RGB TRANSFORMED_DEFAULT_COLOR = new RGB(90, 25, 90);

	private static final RGB DEFAULT_BACKGROUND = new RGB(126, 166, 210);

	private static final RGB DEFAULT_SELECTION_COLOR = new RGB(255, 0, 0);

	static final Set<String> ALL_KEYS = new HashSet<String>();
	static {
		ALL_KEYS.add(KEY_DEFAULT_BACKGROUND);
		ALL_KEYS.add(KEY_SOURCE_DEFAULT_COLOR);
		ALL_KEYS.add(KEY_TRANSFORMED_DEFAULT_COLOR);
		ALL_KEYS.add(KEY_DEFAULT_WIDTH);
		ALL_KEYS.add(KEY_SELECTION_COLOR);
		ALL_KEYS.add(KEY_SELECTION_WIDTH);
	}

	/**
	 * @see AbstractPreferenceInitializer#initializeDefaultPreferences()
	 */
	@Override
	public void initializeDefaultPreferences() {
		IPreferenceStore preferences = InstanceStylePlugin.getDefault().getPreferenceStore();

		preferences.setDefault(KEY_SOURCE_DEFAULT_COLOR,
				StringConverter.asString(SOURCE_DEFAULT_COLOR));
		preferences.setDefault(KEY_TRANSFORMED_DEFAULT_COLOR,
				StringConverter.asString(TRANSFORMED_DEFAULT_COLOR));
		preferences.setDefault(KEY_DEFAULT_WIDTH, StringConverter.asString(1));
		preferences
				.setDefault(KEY_DEFAULT_BACKGROUND, StringConverter.asString(DEFAULT_BACKGROUND));

		preferences.setDefault(KEY_SELECTION_COLOR,
				StringConverter.asString(DEFAULT_SELECTION_COLOR));
		preferences.setDefault(KEY_SELECTION_WIDTH, StringConverter.asString(2));
	}

	/**
	 * Get the default color for the given data set.
	 * 
	 * @param dataSet the data set
	 * @return the default color
	 */
	public static Color getDefaultColor(DataSet dataSet) {
		switch (dataSet) {
		case TRANSFORMED:
			Color transformedColor = getColor(KEY_TRANSFORMED_DEFAULT_COLOR);
			if (transformedColor == null) {
				transformedColor = SwingRcpUtilities.convertToColor(TRANSFORMED_DEFAULT_COLOR);
			}
			return transformedColor;
		case SOURCE:
		default:
			Color sourceColor = getColor(KEY_SOURCE_DEFAULT_COLOR);
			if (sourceColor == null) {
				sourceColor = SwingRcpUtilities.convertToColor(SOURCE_DEFAULT_COLOR);
			}
			return sourceColor;
		}
	}

	/**
	 * Get the default width
	 * 
	 * @return the default width
	 */
	public static int getDefaultWidth() {
		IPreferenceStore preferences = InstanceStylePlugin.getDefault().getPreferenceStore();
		return preferences.getInt(KEY_DEFAULT_WIDTH);
	}

	/**
	 * Get the selection color
	 * 
	 * @return the selection color
	 */
	public static Color getSelectionColor() {
		Color result = getColor(KEY_SELECTION_COLOR);
		if (result == null) {
			result = SwingRcpUtilities.convertToColor(DEFAULT_SELECTION_COLOR);
		}
		return result;
	}

	/**
	 * Get the selection width
	 * 
	 * @return the selection width
	 */
	public static int getSelectionWidth() {
		IPreferenceStore preferences = InstanceStylePlugin.getDefault().getPreferenceStore();
		return preferences.getInt(KEY_SELECTION_WIDTH);
	}

	private static Color getColor(String colorKey) {
		IPreferenceStore preferences = InstanceStylePlugin.getDefault().getPreferenceStore();

		String color = preferences.getString(colorKey);
		if (color == null) {
			return null;
		}
		else {
			try {
				RGB rgb = StringConverter.asRGB(color);
				return SwingRcpUtilities.convertToColor(rgb);
			} catch (DataFormatException e) {
				return null;
			}
		}
	}

	/**
	 * Get the default background
	 * 
	 * @return the default background
	 */
	public static RGB getDefaultBackground() {
		IPreferenceStore preferences = InstanceStylePlugin.getDefault().getPreferenceStore();

		try {
			String color = preferences.getString(KEY_DEFAULT_BACKGROUND);
			return StringConverter.asRGB(color);
		} catch (DataFormatException e) {
			return DEFAULT_BACKGROUND;
		}
	}

}