Java tutorial
/** * Copyright (c) 2011 - 2015, 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.ArrayList; import java.util.Locale; import org.lunifera.ecview.core.common.editpart.IElementEditpart; import org.lunifera.ecview.core.common.editpart.IEmbeddableEditpart; import org.lunifera.ecview.core.common.editpart.ILayoutEditpart; import org.lunifera.ecview.core.extension.model.extension.YSplitPanel; import org.lunifera.runtime.web.ecview.presentation.vaadin.internal.util.Util; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.vaadin.server.Sizeable.Unit; import com.vaadin.ui.AbstractSplitPanel; import com.vaadin.ui.Component; import com.vaadin.ui.ComponentContainer; import com.vaadin.ui.HorizontalSplitPanel; import com.vaadin.ui.VerticalSplitPanel; /** * This presenter is responsible to render a text field on the given layout. */ public class SplitPanelPresentation extends AbstractLayoutPresenter<ComponentContainer> { private static final Logger LOGGER = LoggerFactory.getLogger(SplitPanelPresentation.class); private AbstractSplitPanel splitPanel; private ModelAccess modelAccess; /** * The constructor. * * @param editpart * The editpart of that presentation. */ public SplitPanelPresentation(IElementEditpart editpart) { super((ILayoutEditpart) editpart); this.modelAccess = new ModelAccess((YSplitPanel) editpart.getModel()); } @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() { Util.applyCaptions(getI18nService(), modelAccess.getLabel(), modelAccess.getLabelI18nKey(), getLocale(), splitPanel); } /** * Is called to refresh the UI. The element will be removed from the grid * layout and added to it again afterwards. */ protected void refreshUI() { splitPanel.removeAllComponents(); // iterate all elements and build the child element // for (IEmbeddableEditpart child : getChildren()) { addChild(child); } } @Override public ComponentContainer doCreateWidget(Object parent) { if (splitPanel == null) { splitPanel = modelAccess.yLayout.isVertical() ? new VerticalSplitPanel() : new HorizontalSplitPanel(); setupComponent(splitPanel, getCastedModel()); splitPanel.setSplitPosition(modelAccess.yLayout.getSplitPosition(), Unit.PERCENTAGE); associateWidget(splitPanel, modelAccess.yLayout); if (modelAccess.isCssIdValid()) { splitPanel.setId(modelAccess.getCssID()); } else { splitPanel.setId(getEditpart().getId()); } if (modelAccess.isCssClassValid()) { splitPanel.addStyleName(modelAccess.getCssClass()); } else { splitPanel.addStyleName(CSS_CLASS_CONTROL); } // creates the binding for the field createBindings(modelAccess.yLayout, splitPanel, null); // initialize all children initializeChildren(); renderChildren(false); } return splitPanel; } /** * Adds the children to the superclass and prevents rendering. */ private void initializeChildren() { setRenderLock(true); try { for (IEmbeddableEditpart editPart : getEditpart().getElements()) { super.add(editPart); } } finally { setRenderLock(false); } } @Override public ComponentContainer getWidget() { return splitPanel; } @Override public boolean isRendered() { return splitPanel != null; } @Override public void doUnrender() { if (splitPanel != null) { // unbind all active bindings unbind(); // remove assocations unassociateWidget(splitPanel); splitPanel = null; } } @Override protected void internalDispose() { try { for (IEmbeddableEditpart child : new ArrayList<IEmbeddableEditpart>(getChildren())) { child.dispose(); } unrender(); } finally { super.internalDispose(); } } @Override protected void internalAdd(IEmbeddableEditpart editpart) { addChild(editpart); } private void addChild(IEmbeddableEditpart editpart) { int index = getChildren().indexOf(editpart); if (index > 1) { LOGGER.warn("More than two elements added to splitpanel."); return; } if (index == 0) { splitPanel.setFirstComponent((Component) editpart.render(splitPanel)); } else { splitPanel.setSecondComponent((Component) editpart.render(splitPanel)); } } @Override protected void internalRemove(IEmbeddableEditpart child) { if (splitPanel != null && child.isRendered()) { // will happen during disposal since children already disposed. splitPanel.removeComponent((Component) child.getWidget()); } child.unrender(); } @Override protected void internalInsert(IEmbeddableEditpart editpart, int index) { refreshUI(); } @Override protected void internalMove(IEmbeddableEditpart editpart, int oldIndex, int newIndex) { refreshUI(); } @Override public void renderChildren(boolean force) { if (force) { unrenderChildren(); } refreshUI(); } /** * Will unrender all children. */ protected void unrenderChildren() { for (IEmbeddableEditpart editpart : getChildren()) { if (editpart.isRendered()) { editpart.unrender(); } } } /** * An internal helper class. */ private static class ModelAccess { private final YSplitPanel yLayout; public ModelAccess(YSplitPanel yLayout) { super(); this.yLayout = yLayout; } /** * @return * @see org.lunifera.ecview.core.ui.core.model.core.YCssAble#getCssClass() */ public String getCssClass() { return yLayout.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.lunifera.ecview.core.ui.core.model.core.YCssAble#getCssID() */ public String getCssID() { return yLayout.getCssID(); } /** * Returns true, if the css id is not null and not empty. * * @return */ public boolean isCssIdValid() { return getCssID() != null && !getCssID().equals(""); } /** * Returns the label. * * @return */ public String getLabel() { return yLayout.getDatadescription().getLabel(); } /** * Returns the label. * * @return */ public String getLabelI18nKey() { return yLayout.getDatadescription().getLabelI18nKey(); } } }