/**********************************************
    * Copyright (C) 2011 Lukas Laag
    * This file is part of svgreal.
    * 
    * svgreal is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    * 
   * svgreal 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 General Public License for more details.
   * 
   * You should have received a copy of the GNU General Public License
   * along with svgreal.  If not, see http://www.gnu.org/licenses/
   **********************************************/
  package org.vectomatic.svg.edit.client.gxt.form;
  
  import java.util.Arrays;
  
  import org.vectomatic.svg.edit.client.gxt.widget.SpinnerFieldExt;
  import org.vectomatic.svg.edit.client.model.svg.SVGLength;
  
  import com.extjs.gxt.ui.client.widget.Html;
  import com.extjs.gxt.ui.client.widget.LayoutContainer;
  import com.extjs.gxt.ui.client.widget.form.AdapterField;
  import com.extjs.gxt.ui.client.widget.form.SimpleComboBox;
  import com.extjs.gxt.ui.client.widget.layout.ColumnData;
  import com.extjs.gxt.ui.client.widget.layout.ColumnLayout;
  import com.google.gwt.dom.client.Style;
  import com.google.gwt.i18n.client.NumberFormat;
  
  /**
   * Field subclass to edit SVGLength values
   * @author laaglu
   */
  public class SVGLengthField extends AdapterField {
  	private class SVGLengthPanel extends LayoutContainer {
  		private SpinnerFieldExt valueField;
  		private SimpleComboBox<Style.Unit> unitField;
  	
  		/**
  		 * Constructor
  		 * @param metadata metadata used to label the field.
  		 */
  		public SVGLengthPanel(float min, float max, float increment) {
  		    valueField = new SpinnerFieldExt();
  		    valueField.setPropertyEditorType(Float.class);
  		    valueField.setAllowDecimals(true);
  		    valueField.setAllowNegative(true);
  		    valueField.setFormat(NumberFormat.getFormat("#0.0"));
  		    valueField.setMinValue(min);
  		    valueField.setMaxValue(max);
  		    valueField.setIncrement(increment);
  		    
  			unitField = new SimpleComboBox<Style.Unit>();
  			unitField.setLazyRender(false);
  			unitField.add(Arrays.asList(Style.Unit.values()));
  
  			setLayout(new ColumnLayout());
  			add(valueField, new ColumnData(.775f));
  			add(new Html("&nbsp;"), new ColumnData(.025f));
  			add(unitField, new ColumnData(.2f));
  			valueField.setFireChangeEventOnSetValue(true);
  			unitField.setFireChangeEventOnSetValue(true);
  
  			valueField.setFireChangeEventOnSetValue(true);
  			unitField.setFireChangeEventOnSetValue(true);
  		}
  		
  		public void update(SVGLength length) {
  			if (length != null) {
  				if (valueField.getValue() == null || length.getValue() != valueField.getValue().floatValue()) {
  					valueField.setFireChangeEventOnSetValue(false);
  					valueField.setValue(length.getValue());
  					valueField.setFireChangeEventOnSetValue(true);
  				}
  				if (unitField.getValue() == null || length.getUnit() != unitField.getValue().getValue()) {
  					unitField.setFireChangeEventOnSetValue(false);
  					unitField.setValue(unitField.findModel(length.getUnit()));
  					unitField.setFireChangeEventOnSetValue(true);
  				}
  			}
  		}
  	}
  
  	public SVGLengthField(float min, float max, float increment) {
  		super(null);
  		widget = new SVGLengthPanel(min, max, increment);
  		setResizeWidget(true);
  		setFireChangeEventOnSetValue(true);
  	}
  
  	@Override
  	public void setValue(Object value) {
  		((SVGLengthPanel)widget).update((SVGLength)value);
  		super.setValue(value);
  	}
 	
 	@Override
 	public Object getValue() {
 		return value;
 	}
 	
 	public SpinnerFieldExt getValueField() {
 		return ((SVGLengthPanel)widget).valueField;
 	}
 	
 	public SimpleComboBox<Style.Unit> getUnitField() {
 		return ((SVGLengthPanel)widget).unitField;
 	}
 
 }