Java tutorial
/** * Copyright (c) 2011 - 2014, Lunifera GmbH (Gross Enzersdorf), Loetz KG (Heidelberg) * 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: * Florian Pirchner - Initial implementation */ package org.lunifera.runtime.web.ecview.presentation.vaadin.internal; import java.util.Date; import java.util.Locale; import org.eclipse.core.databinding.Binding; 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.ecp.ecview.common.context.II18nService; import org.eclipse.emf.ecp.ecview.common.editpart.IElementEditpart; import org.eclipse.emf.ecp.ecview.common.model.core.YEmbeddableBindingEndpoint; import org.eclipse.emf.ecp.ecview.common.model.core.YEmbeddableValueEndpoint; import org.eclipse.emf.ecp.ecview.common.model.datatypes.YDatatype; import org.eclipse.emf.ecp.ecview.extension.model.datatypes.YDateTimeDatatype; import org.eclipse.emf.ecp.ecview.extension.model.extension.ExtensionModelPackage; import org.eclipse.emf.ecp.ecview.extension.model.extension.YDateTime; import org.eclipse.emf.ecp.ecview.ui.core.editparts.extension.IDateTimeEditpart; import com.vaadin.data.util.ObjectProperty; import com.vaadin.ui.Component; import com.vaadin.ui.ComponentContainer; import com.vaadin.ui.CssLayout; import com.vaadin.ui.DateField; import com.vaadin.ui.Field; /** * This presenter is responsible to render a text area on the given layout. */ public class DateTimePresentation extends AbstractFieldWidgetPresenter<Component> { private final ModelAccess modelAccess; private CssLayout componentBase; private DateField dateField; private Binding binding_valueToUI; private ObjectProperty<Date> property; /** * Constructor. * * @param editpart * The editpart of that presenter */ public DateTimePresentation(IElementEditpart editpart) { super((IDateTimeEditpart) editpart); this.modelAccess = new ModelAccess((YDateTime) editpart.getModel()); } /** * {@inheritDoc} */ @Override public Component doCreateWidget(Object parent) { if (componentBase == null) { componentBase = new CssLayout(); componentBase.addStyleName(CSS_CLASS_CONTROL_BASE); if (modelAccess.isCssIdValid()) { componentBase.setId(modelAccess.getCssID()); } else { componentBase.setId(getEditpart().getId()); } associateWidget(componentBase, modelAccess.yDateTime); dateField = new DateField(); dateField.addStyleName(CSS_CLASS_CONTROL); dateField.setImmediate(true); associateWidget(dateField, modelAccess.yDateTime); property = new ObjectProperty<Date>(null, Date.class); dateField.setPropertyDataSource(property); // creates the binding for the field createBindings(modelAccess.yDateTime, dateField); componentBase.addComponent(dateField); if (modelAccess.isCssClassValid()) { dateField.addStyleName(modelAccess.getCssClass()); } doApplyDatatype(modelAccess.yDateTime.getDatatype()); applyCaptions(); initializeField(dateField); } return componentBase; } /** * Applies the datatype options to the field. * * @param yDt */ protected void doApplyDatatype(YDatatype yDt) { if (dateField == null) { return; } dateField.setDateFormat(getDateformat((YDateTimeDatatype) yDt)); } /** * Returns the date format. * * @return */ public String getDateformat(YDateTimeDatatype yDt) { if (yDt == null) { return "yyyy.MM.dd HH:mm"; } switch (yDt.getFormat()) { case DATE: return "yyyy.MM.dd"; case DATE_TIME: return "yyyy.MM.dd HH:mm"; case TIME: return "HH:mm:ss"; } return "yyyy.MM.dd HH:mm"; } @Override protected void doUpdateLocale(Locale locale) { // no need to set the locale to the ui elements. Is handled by vaadin // internally. // update the captions applyCaptions(); } /** * Applies the labels to the widgets. */ protected void applyCaptions() { II18nService service = getI18nService(); if (service != null && modelAccess.isLabelI18nKeyValid()) { componentBase.setCaption(service.getValue(modelAccess.getLabelI18nKey(), getLocale())); } else { if (modelAccess.isLabelValid()) { componentBase.setCaption(modelAccess.getLabel()); } } } @Override protected Field<?> doGetField() { return dateField; } @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 */ protected IObservableValue internalGetValueEndpoint() { // return the observable value for text return EMFObservables.observeValue(castEObject(getModel()), ExtensionModelPackage.Literals.YDATE_TIME__VALUE); } /** * Creates the bindings for the given values. * * @param yField * @param field */ protected void createBindings(YDateTime yField, DateField field) { // create the model binding from widget to ECView-model binding_valueToUI = createBindingsValue(castEObject(getModel()), ExtensionModelPackage.Literals.YDATE_TIME__VALUE, field, null, null); registerBinding(binding_valueToUI); super.createBindings(yField, field, componentBase); } @Override public Component getWidget() { return componentBase; } @Override public boolean isRendered() { return componentBase != null; } /** * {@inheritDoc} */ @Override public void doUnrender() { if (componentBase != null) { // unbind all active bindings unbind(); ComponentContainer parent = ((ComponentContainer) componentBase.getParent()); if (parent != null) { parent.removeComponent(componentBase); } // remove assocations unassociateWidget(componentBase); unassociateWidget(dateField); componentBase = null; dateField = null; } } /** * {@inheritDoc} */ @Override protected void internalDispose() { try { unrender(); } finally { super.internalDispose(); } binding_valueToUI.dispose(); binding_valueToUI = null; } /** * A helper class. */ private static class ModelAccess { private final YDateTime yDateTime; public ModelAccess(YDateTime yDateTime) { super(); this.yDateTime = yDateTime; } /** * @return * @see org.eclipse.emf.ecp.ecview.ui.core.model.core.YCssAble#getCssClass() */ public String getCssClass() { return yDateTime.getCssClass(); } /** * Returns true, if the css class is not null and not empty. * * @return */ public boolean isCssClassValid() { return getCssClass() != null && !getCssClass().equals(""); } /** * @return * @see org.eclipse.emf.ecp.ecview.ui.core.model.core.YCssAble#getCssID() */ public String getCssID() { return yDateTime.getCssID(); } /** * Returns true, if the css id is not null and not empty. * * @return */ public boolean isCssIdValid() { return getCssID() != null && !getCssID().equals(""); } /** * Returns true, if the label is valid. * * @return */ public boolean isLabelValid() { return yDateTime.getDatadescription() != null && yDateTime.getDatadescription().getLabel() != null; } /** * Returns the label. * * @return */ public String getLabel() { return yDateTime.getDatadescription().getLabel(); } /** * Returns true, if the date format is valid. * * @return */ @SuppressWarnings("unused") public boolean isDateformatValid() { return yDateTime.getDatadescription() != null && yDateTime.getDatatype().getFormat() != null; } /** * Returns true, if the label is valid. * * @return */ public boolean isLabelI18nKeyValid() { return yDateTime.getDatadescription() != null && yDateTime.getDatadescription().getLabelI18nKey() != null; } /** * Returns the label. * * @return */ public String getLabelI18nKey() { return yDateTime.getDatadescription().getLabelI18nKey(); } } }