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.Locale; 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.extension.model.extension.ExtensionModelPackage; import org.eclipse.emf.ecp.ecview.extension.model.extension.YProgressBar; import org.eclipse.emf.ecp.ecview.ui.core.editparts.extension.IProgressBarEditpart; 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.Field; import com.vaadin.ui.ProgressBar; /** * This presenter is responsible to render a progress bar on the given layout. */ public class ProgressBarPresentation extends AbstractFieldWidgetPresenter<Component> { private final ModelAccess modelAccess; private CssLayout componentBase; private ProgressBar progressBar; private ObjectProperty<Float> property; /** * Constructor. * * @param editpart * The editpart of that presenter */ public ProgressBarPresentation(IElementEditpart editpart) { super((IProgressBarEditpart) editpart); this.modelAccess = new ModelAccess((YProgressBar) 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.yProgressBar); progressBar = new ProgressBar(); progressBar.addStyleName(CSS_CLASS_CONTROL); progressBar.setImmediate(true); associateWidget(progressBar, modelAccess.yProgressBar); property = new ObjectProperty<Float>(0f, Float.class); progressBar.setPropertyDataSource(property); // creates the binding for the field createBindings(modelAccess.yProgressBar, progressBar); componentBase.addComponent(progressBar); if (modelAccess.isCssClassValid()) { progressBar.addStyleName(modelAccess.getCssClass()); } applyCaptions(); initializeField(progressBar); } return componentBase; } @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 progressBar; } @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.YPROGRESS_BAR__VALUE); } /** * Creates the bindings for the given values. * * @param yField * @param field */ protected void createBindings(YProgressBar yField, ProgressBar field) { // create the model binding from ridget to ECView-model registerBinding(createBindings_Value(castEObject(getModel()), ExtensionModelPackage.Literals.YPROGRESS_BAR__VALUE, progressBar)); 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(progressBar); componentBase = null; progressBar = null; } } /** * {@inheritDoc} */ @Override protected void internalDispose() { try { unrender(); } finally { super.internalDispose(); } } /** * A helper class. */ private static class ModelAccess { private final YProgressBar yProgressBar; public ModelAccess(YProgressBar yProgressBar) { super(); this.yProgressBar = yProgressBar; } /** * @return * @see org.eclipse.emf.ecp.ecview.ui.core.model.core.YCssAble#getCssClass() */ public String getCssClass() { return yProgressBar.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 yProgressBar.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 yProgressBar.getDatadescription() != null && yProgressBar.getDatadescription().getLabel() != null; } /** * Returns the label. * * @return */ public String getLabel() { return yProgressBar.getDatadescription().getLabel(); } /** * Returns true, if the label is valid. * * @return */ public boolean isLabelI18nKeyValid() { return yProgressBar.getDatadescription() != null && yProgressBar.getDatadescription().getLabelI18nKey() != null; } /** * Returns the label. * * @return */ public String getLabelI18nKey() { return yProgressBar.getDatadescription().getLabelI18nKey(); } } }