org.eclipse.osbp.runtime.web.ecview.presentation.vaadin/src/org/eclipse/osbp/runtime/web/ecview/presentation/vaadin/internal/DecimalFieldPresentation.java - osbp/org.eclipse.osbp.runtime.web - Git at Google

 /**
  * Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *         Florian Pirchner - Initial implementation
  */
 package org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal;

 import java.util.Locale;

 import org.eclipse.core.databinding.Binding;
 import org.eclipse.core.databinding.UpdateValueStrategy;
 import org.eclipse.core.databinding.observable.IObservable;
 import org.eclipse.core.databinding.observable.value.IObservableValue;
 import org.eclipse.emf.databinding.EMFObservables;
 import org.eclipse.emf.ecore.EObject;
 import org.eclipse.emf.ecore.EStructuralFeature;
 import org.eclipse.osbp.ecview.core.common.editpart.IElementEditpart;
 import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableBindingEndpoint;
 import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableValueEndpoint;
 import org.eclipse.osbp.ecview.core.common.model.core.YValueBindable;
 import org.eclipse.osbp.ecview.core.common.model.datatypes.YDatatype;
 import org.eclipse.osbp.ecview.core.extension.model.datatypes.YDecimalDatatype;
 import org.eclipse.osbp.ecview.core.extension.model.extension.ExtensionModelPackage;
 import org.eclipse.osbp.ecview.core.extension.model.extension.YDecimalField;
 import org.eclipse.osbp.ecview.core.ui.core.editparts.extension.IDecimalFieldEditpart;
 import org.eclipse.osbp.ecview.core.util.emf.ModelUtil;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.IBindingManager;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.AbstractFieldWidgetPresenter;
 import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.util.Util;
 import org.eclipse.osbp.runtime.web.vaadin.components.converter.DecimalConverter;
 import org.eclipse.osbp.runtime.web.vaadin.components.fields.DecimalField;
 import org.eclipse.osbp.runtime.web.vaadin.databinding.VaadinObservables;

 import com.vaadin.data.Property;
 import com.vaadin.data.Property.ValueChangeEvent;
 import com.vaadin.data.util.ObjectProperty;
 import com.vaadin.data.util.converter.Converter;
 import com.vaadin.server.ErrorMessage;
 import com.vaadin.ui.AbstractField;
 import com.vaadin.ui.Component;
 import com.vaadin.ui.ComponentContainer;
 import com.vaadin.ui.Field;

 // TODO: Auto-generated Javadoc
 /**
  * This presenter is responsible to render a text area on the given layout.
  */
 public class DecimalFieldPresentation extends AbstractFieldWidgetPresenter<Component> {

 	/** The model access. */
 	private final ModelAccess modelAccess;

 	/** The decimal field. */
 	private CustomField decimalField;

 	/** The binding_value to ui. */
 	private Binding binding_valueToUI;

 	/** The property. */
 	private ObjectProperty<Double> property;

 	/**
 	 * Constructor.
 	 *
 	 * @param editpart
 	 *            The editpart of that presenter
 	 */
 	public DecimalFieldPresentation(IElementEditpart editpart) {
 		super((IDecimalFieldEditpart) editpart);
 		this.modelAccess = new ModelAccess((YDecimalField) editpart.getModel());
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@SuppressWarnings({ "serial" })
 	@Override
 	public Component doCreateWidget(Object parent) {
 		if (decimalField == null) {

 			decimalField = new CustomField((DecimalConverter) getConverter());
 			decimalField.addStyleName(CSS_CLASS_CONTROL);
 			decimalField.setImmediate(true);
 			setupComponent(decimalField, getCastedModel());

 			associateWidget(decimalField, modelAccess.yField);
 			if (modelAccess.isCssIdValid()) {
 				decimalField.setId(modelAccess.getCssID());
 			} else {
 				decimalField.setId(getEditpart().getId());
 			}

 			property = new ObjectProperty<Double>(0d, Double.class);
 			decimalField.setPropertyDataSource(property);

 			if (modelAccess.isCssClassValid()) {
 				decimalField.addStyleName(modelAccess.getCssClass());
 			}

 			applyCaptions();
 			doApplyDatatype(modelAccess.yField.getDatatype());

 			initializeField(decimalField);

 			// creates the binding for the field
 			createBindings(modelAccess.yField, decimalField);

 			// send an event, that the content was rendered again
 			sendRenderedLifecycleEvent();
 		}
 		return decimalField;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractFieldWidgetPresenter#getDefaultConverter()
 	 */
 	@Override
 	protected Converter<?, ?> getDefaultConverter() {
 		return new DecimalConverter();
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractFieldWidgetPresenter#doUpdateConverter(com.vaadin.data.util.
 	 * converter.Converter)
 	 */
 	@SuppressWarnings("rawtypes")
 	protected void doUpdateConverter(Converter converter) {
 		super.doUpdateConverter(converter);

 		// if converter changes, then apply the settings from datatype to it
 		doApplyDatatype(modelAccess.yField.getDatatype());
 	}

 	/**
 	 * Applies the datatype options to the field.
 	 *
 	 * @param yDt
 	 *            the y dt
 	 */
 	protected void doApplyDatatype(YDatatype yDt) {
 		if (decimalField == null) {
 			return;
 		}

 		int oldPrecision = decimalField.getPrecision();
 		if (yDt == null) {
 			decimalField.setPrecision(2);
 			decimalField.setUseGrouping(true);
 			decimalField.setMarkNegative(true);
 		} else {
 			YDecimalDatatype yCasted = (YDecimalDatatype) yDt;
 			decimalField.setPrecision(yCasted.getPrecision());
 			decimalField.setUseGrouping(yCasted.isGrouping());
 			decimalField.setMarkNegative(yCasted.isMarkNegative());
 		}

 		if (isRendered()) {
 			// if the precision changed, then update the value from the ui field
 			// to the ECViewModel
 			if (oldPrecision != decimalField.getPrecision()) {
 				updateUiToECViewModel();
 			}
 		}

 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractVaadinWidgetPresenter#doUpdateLocale(java.util.Locale)
 	 */
 	@Override
 	protected void doUpdateLocale(Locale locale) {
 		// update the captions
 		applyCaptions();

 		// tell the number field about the locale change
 		if (decimalField != null) {
 			decimalField.setLocale(locale);
 		}
 	}

 	/**
 	 * Applies the labels to the widgets.
 	 */
 	protected void applyCaptions() {
 		Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(),
 				decimalField);
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractFieldWidgetPresenter#doGetField()
 	 */
 	@Override
 	protected Field<?> doGetField() {
 		return decimalField;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
 	 * AbstractVaadinWidgetPresenter#internalGetObservableEndpoint(org.eclipse.
 	 * osbp.ecview.core.common.model.core.YEmbeddableBindingEndpoint)
 	 */
 	@Override
 	protected IObservable internalGetObservableEndpoint(YEmbeddableBindingEndpoint bindableValue) {
 		if (bindableValue == null) {
 			throw new IllegalArgumentException("BindableValue must not be null!");
 		}

 		if (bindableValue instanceof YEmbeddableValueEndpoint) {
 			return internalGetValueEndpoint();
 		}
 		throw new IllegalArgumentException("Not a valid input: " + bindableValue);
 	}

 	/**
 	 * Returns the observable to observe value.
 	 *
 	 * @return the i observable value
 	 */
 	protected IObservableValue internalGetValueEndpoint() {
 		// return the observable value for text
 		return EMFObservables.observeValue(castEObject(getModel()),
 				ExtensionModelPackage.Literals.YDECIMAL_FIELD__VALUE);
 	}

 	/**
 	 * Creates the bindings for the given values.
 	 *
 	 * @param yField
 	 *            the y field
 	 * @param field
 	 *            the field
 	 */
 	protected void createBindings(YDecimalField yField, DecimalField field) {
 		// create the value binding from widget to ECView-model
 		binding_valueToUI = createBindings_Value(castEObject(getModel()),
 				ExtensionModelPackage.Literals.YDECIMAL_FIELD__VALUE, field);


 		registerBinding(binding_valueToUI);

 		super.createBindings(yField, field, null);
 	}

 	/**
 	 * Creates the model binding.
 	 *
 	 * @param model
 	 *            the model
 	 * @param modelFeature
 	 *            the model feature
 	 * @param field
 	 *            the field
 	 * @param targetToModel
 	 *            the target to model
 	 * @param modelToTarget
 	 *            the model to target
 	 * @return the binding
 	 */
 	protected Binding createModelBinding(EObject model, EStructuralFeature modelFeature, AbstractField<?> field,
 			UpdateValueStrategy targetToModel, UpdateValueStrategy modelToTarget) {
 		IBindingManager bindingManager = getViewContext()
 				.getService(org.eclipse.osbp.ecview.core.common.binding.IECViewBindingManager.class.getName());
 		if (bindingManager != null) {
 			// bind the value of yText to textRidget
 			IObservableValue modelObservable = EMFObservables.observeValue(model, modelFeature);
 			IObservableValue uiObservable = VaadinObservables.observeConvertedValue(field);
 			return bindingManager.bindValue(uiObservable, modelObservable, targetToModel, modelToTarget);
 		}
 		return null;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
 	 * getWidget()
 	 */
 	@Override
 	public Component getWidget() {
 		return decimalField;
 	}

 	/*
 	 * (non-Javadoc)
 	 *
 	 * @see
 	 * org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
 	 * isRendered()
 	 */
 	@Override
 	public boolean isRendered() {
 		return decimalField != null;
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	public void doUnrender() {
 		if (decimalField != null) {

 			// unbind all active bindings
 			unbind();

 			Component parent = ((Component) decimalField.getParent());
 			if (parent != null && parent instanceof ComponentContainer) {
 				((ComponentContainer) parent).removeComponent(decimalField);
 			}

 			// remove assocations
 			unassociateWidget(decimalField);

 			decimalField = null;

 			sendUnrenderedLifecycleEvent();
 		}
 	}

 	/**
 	 * {@inheritDoc}
 	 */
 	@Override
 	protected void internalDispose() {
 		try {
 			unrender();
 			binding_valueToUI = null;
 		} finally {
 			super.internalDispose();
 		}
 	}

 	/**
 	 * Update ui to ec view model.
 	 */
 	protected void updateUiToECViewModel() {
 		if (binding_valueToUI != null) {
 			binding_valueToUI.updateTargetToModel();
 		}

 		Binding domainToEObjectBinding = ModelUtil.getValueBinding((YValueBindable) getModel());
 		if (domainToEObjectBinding != null) {
 			domainToEObjectBinding.updateTargetToModel();
 		}
 	}

 	/**
 	 * A helper class.
 	 */
 	private static class ModelAccess {

 		/** The y field. */
 		private final YDecimalField yField;

 		/**
 		 * Instantiates a new model access.
 		 *
 		 * @param yField
 		 *            the y field
 		 */
 		public ModelAccess(YDecimalField yField) {
 			super();
 			this.yField = yField;
 		}

 		/**
 		 * Gets the css class.
 		 *
 		 * @return the css class
 		 * @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssClass()
 		 */
 		public String getCssClass() {
 			return yField.getCssClass();
 		}

 		/**
 		 * Returns true, if the css class is not null and not empty.
 		 *
 		 * @return true, if is css class valid
 		 */
 		public boolean isCssClassValid() {
 			return getCssClass() != null && !getCssClass().equals("");
 		}

 		/**
 		 * Gets the css id.
 		 *
 		 * @return the css id
 		 * @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssID()
 		 */
 		public String getCssID() {
 			return yField.getCssID();
 		}

 		/**
 		 * Returns true, if the css id is not null and not empty.
 		 *
 		 * @return true, if is css id valid
 		 */
 		public boolean isCssIdValid() {
 			return getCssID() != null && !getCssID().equals("");
 		}

 		/**
 		 * Returns the label.
 		 *
 		 * @return the label
 		 */
 		public String getLabel() {
 			return yField.getDatadescription() != null ? yField.getDatadescription().getLabel() : null;
 		}

 		/**
 		 * Returns the label.
 		 *
 		 * @return the label i18n key
 		 */
 		public String getLabelI18nKey() {
 			return yField.getDatadescription() != null ? yField.getDatadescription().getLabelI18nKey() : null;
 		}
 	}

 	/**
 	 * The Class CustomField.
 	 */
 	@SuppressWarnings("serial")
 	private class CustomField extends DecimalField {

 		/**
 		 * Instantiates a new custom field.
 		 *
 		 * @param converter
 		 *            the converter
 		 */
 		public CustomField(DecimalConverter converter) {
 			super("", converter);
 		}

 		/*
 		 * (non-Javadoc)
 		 *
 		 * @see com.vaadin.ui.AbstractField#getErrorMessage()
 		 */
 		@Override
 		public ErrorMessage getErrorMessage() {
 			if (isDisposed()) {
 				// after disposal, Vaadin will call this method once.
 				return null;
 			}

 			ErrorMessage message = super.getErrorMessage();
 			reportValidationError(message);
 			return message;
 		}

 		public void clear() {
 			setValue("0.0");
 		}
 	}
 }
	/**
	* Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
	* All rights reserved. This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* Florian Pirchner - Initial implementation
	*/
	package org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal;

	import java.util.Locale;

	import org.eclipse.core.databinding.Binding;
	import org.eclipse.core.databinding.UpdateValueStrategy;
	import org.eclipse.core.databinding.observable.IObservable;
	import org.eclipse.core.databinding.observable.value.IObservableValue;
	import org.eclipse.emf.databinding.EMFObservables;
	import org.eclipse.emf.ecore.EObject;
	import org.eclipse.emf.ecore.EStructuralFeature;
	import org.eclipse.osbp.ecview.core.common.editpart.IElementEditpart;
	import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableBindingEndpoint;
	import org.eclipse.osbp.ecview.core.common.model.core.YEmbeddableValueEndpoint;
	import org.eclipse.osbp.ecview.core.common.model.core.YValueBindable;
	import org.eclipse.osbp.ecview.core.common.model.datatypes.YDatatype;
	import org.eclipse.osbp.ecview.core.extension.model.datatypes.YDecimalDatatype;
	import org.eclipse.osbp.ecview.core.extension.model.extension.ExtensionModelPackage;
	import org.eclipse.osbp.ecview.core.extension.model.extension.YDecimalField;
	import org.eclipse.osbp.ecview.core.ui.core.editparts.extension.IDecimalFieldEditpart;
	import org.eclipse.osbp.ecview.core.util.emf.ModelUtil;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.IBindingManager;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.AbstractFieldWidgetPresenter;
	import org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.internal.util.Util;
	import org.eclipse.osbp.runtime.web.vaadin.components.converter.DecimalConverter;
	import org.eclipse.osbp.runtime.web.vaadin.components.fields.DecimalField;
	import org.eclipse.osbp.runtime.web.vaadin.databinding.VaadinObservables;

	import com.vaadin.data.Property;
	import com.vaadin.data.Property.ValueChangeEvent;
	import com.vaadin.data.util.ObjectProperty;
	import com.vaadin.data.util.converter.Converter;
	import com.vaadin.server.ErrorMessage;
	import com.vaadin.ui.AbstractField;
	import com.vaadin.ui.Component;
	import com.vaadin.ui.ComponentContainer;
	import com.vaadin.ui.Field;

	// TODO: Auto-generated Javadoc
	/**
	* This presenter is responsible to render a text area on the given layout.
	*/
	public class DecimalFieldPresentation extends AbstractFieldWidgetPresenter<Component> {

	/** The model access. */
	private final ModelAccess modelAccess;

	/** The decimal field. */
	private CustomField decimalField;

	/** The binding_value to ui. */
	private Binding binding_valueToUI;

	/** The property. */
	private ObjectProperty<Double> property;

	/**
	* Constructor.
	*
	* @param editpart
	* The editpart of that presenter
	*/
	public DecimalFieldPresentation(IElementEditpart editpart) {
	super((IDecimalFieldEditpart) editpart);
	this.modelAccess = new ModelAccess((YDecimalField) editpart.getModel());
	}

	/**
	* {@inheritDoc}
	*/
	@SuppressWarnings({ "serial" })
	@Override
	public Component doCreateWidget(Object parent) {
	if (decimalField == null) {

	decimalField = new CustomField((DecimalConverter) getConverter());
	decimalField.addStyleName(CSS_CLASS_CONTROL);
	decimalField.setImmediate(true);
	setupComponent(decimalField, getCastedModel());

	associateWidget(decimalField, modelAccess.yField);
	if (modelAccess.isCssIdValid()) {
	decimalField.setId(modelAccess.getCssID());
	} else {
	decimalField.setId(getEditpart().getId());
	}

	property = new ObjectProperty<Double>(0d, Double.class);
	decimalField.setPropertyDataSource(property);

	if (modelAccess.isCssClassValid()) {
	decimalField.addStyleName(modelAccess.getCssClass());
	}

	applyCaptions();
	doApplyDatatype(modelAccess.yField.getDatatype());

	initializeField(decimalField);

	// creates the binding for the field
	createBindings(modelAccess.yField, decimalField);

	// send an event, that the content was rendered again
	sendRenderedLifecycleEvent();
	}
	return decimalField;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractFieldWidgetPresenter#getDefaultConverter()
	*/
	@Override
	protected Converter<?, ?> getDefaultConverter() {
	return new DecimalConverter();
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractFieldWidgetPresenter#doUpdateConverter(com.vaadin.data.util.
	* converter.Converter)
	*/
	@SuppressWarnings("rawtypes")
	protected void doUpdateConverter(Converter converter) {
	super.doUpdateConverter(converter);

	// if converter changes, then apply the settings from datatype to it
	doApplyDatatype(modelAccess.yField.getDatatype());
	}

	/**
	* Applies the datatype options to the field.
	*
	* @param yDt
	* the y dt
	*/
	protected void doApplyDatatype(YDatatype yDt) {
	if (decimalField == null) {
	return;
	}

	int oldPrecision = decimalField.getPrecision();
	if (yDt == null) {
	decimalField.setPrecision(2);
	decimalField.setUseGrouping(true);
	decimalField.setMarkNegative(true);
	} else {
	YDecimalDatatype yCasted = (YDecimalDatatype) yDt;
	decimalField.setPrecision(yCasted.getPrecision());
	decimalField.setUseGrouping(yCasted.isGrouping());
	decimalField.setMarkNegative(yCasted.isMarkNegative());
	}

	if (isRendered()) {
	// if the precision changed, then update the value from the ui field
	// to the ECViewModel
	if (oldPrecision != decimalField.getPrecision()) {
	updateUiToECViewModel();
	}
	}

	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractVaadinWidgetPresenter#doUpdateLocale(java.util.Locale)
	*/
	@Override
	protected void doUpdateLocale(Locale locale) {
	// update the captions
	applyCaptions();

	// tell the number field about the locale change
	if (decimalField != null) {
	decimalField.setLocale(locale);
	}
	}

	/**
	* Applies the labels to the widgets.
	*/
	protected void applyCaptions() {
	Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(),
	decimalField);
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractFieldWidgetPresenter#doGetField()
	*/
	@Override
	protected Field<?> doGetField() {
	return decimalField;
	}

	/*
	* (non-Javadoc)
	*
	* @see org.eclipse.osbp.runtime.web.ecview.presentation.vaadin.common.
	* AbstractVaadinWidgetPresenter#internalGetObservableEndpoint(org.eclipse.
	* osbp.ecview.core.common.model.core.YEmbeddableBindingEndpoint)
	*/
	@Override
	protected IObservable internalGetObservableEndpoint(YEmbeddableBindingEndpoint bindableValue) {
	if (bindableValue == null) {
	throw new IllegalArgumentException("BindableValue must not be null!");
	}

	if (bindableValue instanceof YEmbeddableValueEndpoint) {
	return internalGetValueEndpoint();
	}
	throw new IllegalArgumentException("Not a valid input: " + bindableValue);
	}

	/**
	* Returns the observable to observe value.
	*
	* @return the i observable value
	*/
	protected IObservableValue internalGetValueEndpoint() {
	// return the observable value for text
	return EMFObservables.observeValue(castEObject(getModel()),
	ExtensionModelPackage.Literals.YDECIMAL_FIELD__VALUE);
	}

	/**
	* Creates the bindings for the given values.
	*
	* @param yField
	* the y field
	* @param field
	* the field
	*/
	protected void createBindings(YDecimalField yField, DecimalField field) {
	// create the value binding from widget to ECView-model
	binding_valueToUI = createBindings_Value(castEObject(getModel()),
	ExtensionModelPackage.Literals.YDECIMAL_FIELD__VALUE, field);


	registerBinding(binding_valueToUI);

	super.createBindings(yField, field, null);
	}

	/**
	* Creates the model binding.
	*
	* @param model
	* the model
	* @param modelFeature
	* the model feature
	* @param field
	* the field
	* @param targetToModel
	* the target to model
	* @param modelToTarget
	* the model to target
	* @return the binding
	*/
	protected Binding createModelBinding(EObject model, EStructuralFeature modelFeature, AbstractField<?> field,
	UpdateValueStrategy targetToModel, UpdateValueStrategy modelToTarget) {
	IBindingManager bindingManager = getViewContext()
	.getService(org.eclipse.osbp.ecview.core.common.binding.IECViewBindingManager.class.getName());
	if (bindingManager != null) {
	// bind the value of yText to textRidget
	IObservableValue modelObservable = EMFObservables.observeValue(model, modelFeature);
	IObservableValue uiObservable = VaadinObservables.observeConvertedValue(field);
	return bindingManager.bindValue(uiObservable, modelObservable, targetToModel, modelToTarget);
	}
	return null;
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
	* getWidget()
	*/
	@Override
	public Component getWidget() {
	return decimalField;
	}

	/*
	* (non-Javadoc)
	*
	* @see
	* org.eclipse.osbp.ecview.core.common.presentation.IWidgetPresentation#
	* isRendered()
	*/
	@Override
	public boolean isRendered() {
	return decimalField != null;
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	public void doUnrender() {
	if (decimalField != null) {

	// unbind all active bindings
	unbind();

	Component parent = ((Component) decimalField.getParent());
	if (parent != null && parent instanceof ComponentContainer) {
	((ComponentContainer) parent).removeComponent(decimalField);
	}

	// remove assocations
	unassociateWidget(decimalField);

	decimalField = null;

	sendUnrenderedLifecycleEvent();
	}
	}

	/**
	* {@inheritDoc}
	*/
	@Override
	protected void internalDispose() {
	try {
	unrender();
	binding_valueToUI = null;
	} finally {
	super.internalDispose();
	}
	}

	/**
	* Update ui to ec view model.
	*/
	protected void updateUiToECViewModel() {
	if (binding_valueToUI != null) {
	binding_valueToUI.updateTargetToModel();
	}

	Binding domainToEObjectBinding = ModelUtil.getValueBinding((YValueBindable) getModel());
	if (domainToEObjectBinding != null) {
	domainToEObjectBinding.updateTargetToModel();
	}
	}

	/**
	* A helper class.
	*/
	private static class ModelAccess {

	/** The y field. */
	private final YDecimalField yField;

	/**
	* Instantiates a new model access.
	*
	* @param yField
	* the y field
	*/
	public ModelAccess(YDecimalField yField) {
	super();
	this.yField = yField;
	}

	/**
	* Gets the css class.
	*
	* @return the css class
	* @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssClass()
	*/
	public String getCssClass() {
	return yField.getCssClass();
	}

	/**
	* Returns true, if the css class is not null and not empty.
	*
	* @return true, if is css class valid
	*/
	public boolean isCssClassValid() {
	return getCssClass() != null && !getCssClass().equals("");
	}

	/**
	* Gets the css id.
	*
	* @return the css id
	* @see org.eclipse.osbp.ecview.core.ui.core.model.core.YCssAble#getCssID()
	*/
	public String getCssID() {
	return yField.getCssID();
	}

	/**
	* Returns true, if the css id is not null and not empty.
	*
	* @return true, if is css id valid
	*/
	public boolean isCssIdValid() {
	return getCssID() != null && !getCssID().equals("");
	}

	/**
	* Returns the label.
	*
	* @return the label
	*/
	public String getLabel() {
	return yField.getDatadescription() != null ? yField.getDatadescription().getLabel() : null;
	}

	/**
	* Returns the label.
	*
	* @return the label i18n key
	*/
	public String getLabelI18nKey() {
	return yField.getDatadescription() != null ? yField.getDatadescription().getLabelI18nKey() : null;
	}
	}

	/**
	* The Class CustomField.
	*/
	@SuppressWarnings("serial")
	private class CustomField extends DecimalField {

	/**
	* Instantiates a new custom field.
	*
	* @param converter
	* the converter
	*/
	public CustomField(DecimalConverter converter) {
	super("", converter);
	}

	/*
	* (non-Javadoc)
	*
	* @see com.vaadin.ui.AbstractField#getErrorMessage()
	*/
	@Override
	public ErrorMessage getErrorMessage() {
	if (isDisposed()) {
	// after disposal, Vaadin will call this method once.
	return null;
	}

	ErrorMessage message = super.getErrorMessage();
	reportValidationError(message);
	return message;
	}

	public void clear() {
	setValue("0.0");
	}
	}
	}