/*******************************************************************************
 * Copyright (c) 2007 VTT Technical Research Centre of Finland and others.
 * 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:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.proconf.g3d.preferences;

import org.eclipse.jface.preference.*;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.ui.IWorkbench;
import org.simantics.proconf.g3d.Activator;


/**
 * This class represents a preference page that
 * is contributed to the Preferences dialog. By 
 * subclassing <samp>FieldEditorPreferencePage</samp>, we
 * can use the field support built into JFace that allows
 * us to create a page that is small and knows how to 
 * save, restore and apply itself.
 * <p>
 * This page is used to modify preferences only. They
 * are stored in the preference store that belongs to
 * the main plug-in class. That way, preferences can
 * be accessed directly via the preference store.
 */

public class G3DPreferencesPage
	extends FieldEditorPreferencePage
	implements IWorkbenchPreferencePage {

	public G3DPreferencesPage() {
		super(GRID);
		setPreferenceStore(Activator.getDefault().getPreferenceStore());
		setDescription("A demonstration of a preference page implementation");
	}
	
	/**
	 * Creates the field editors. Field editors are abstractions of
	 * the common GUI blocks needed to manipulate various types
	 * of preferences. Each field editor knows how to save and
	 * restore itself.
	 */
	public void createFieldEditors() {
//		addField(new DirectoryFieldEditor(PreferenceConstants.P_PATH, 
//				"&Directory preference:", getFieldEditorParent()));
//		addField(
//			new BooleanFieldEditor(
//				PreferenceConstants.P_BOOLEAN,
//				"&An example of a boolean preference",
//				getFieldEditorParent()));
//
//		addField(new RadioGroupFieldEditor(
//				PreferenceConstants.P_CHOICE,
//			"An example of a multiple-choice preference",
//			1,
//			new String[][] { { "&Choice 1", "choice1" }, {
//				"C&hoice 2", "choice2" }
//		}, getFieldEditorParent()));
//		addField(
//			new StringFieldEditor(PreferenceConstants.P_STRING, "A &text preference:", getFieldEditorParent()));
		addField(new BooleanFieldEditor(PreferenceConstants.SHADOWS,"Use Shadows",getFieldEditorParent()));
		addField(new RadioGroupFieldEditor(PreferenceConstants.POST_PROCESS, "Post Processing", 1,
				new String[][] { { "None", "none" }, 
								 { "Sketch", "sketch" },
								 { "Bloom", "bloom" }}, 
								 getFieldEditorParent()));
		addField(new ScaleFieldEditor(PreferenceConstants.GIZMO_SCALE,"Gizmo scale",getFieldEditorParent(),5,100,1,10) {
			private double oldValue;
			
			@Override
			protected void doStore() {
				getPreferenceStore()
                .setValue(getPreferenceName(), scale.getSelection()*0.1);
			}
			
			@Override
			protected void doLoadDefault() {
				if (scale != null) {
		            double value = getPreferenceStore().getDefaultDouble(getPreferenceName());
		            scale.setSelection((int)(value*10.0));
		        }
		        valueChanged();
			}
			
			@Override
			protected void doLoad() {
				if (scale != null) {
					double value = getPreferenceStore().getDouble(getPreferenceName());
		            scale.setSelection((int)(value*10.0));
		            oldValue = value;
		        };
			}
			
			@Override
			protected void valueChanged() {
		        setPresentsDefaultValue(false);

		        double newValue = scale.getSelection()*0.1;
		        if (newValue != oldValue) {
		            fireStateChanged(IS_VALID, false, true);
		            fireValueChanged(VALUE, new Double(oldValue),
		                    new Double(newValue));
		            oldValue = newValue;
		        }
		    }
		});
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IWorkbenchPreferencePage#init(org.eclipse.ui.IWorkbench)
	 */
	public void init(IWorkbench workbench) {
	}
	
}