org.lunifera.runtime.web.ecview.presentation.vaadin.internal.TabPresentation.java Source code

Introduction

Here is the source code for org.lunifera.runtime.web.ecview.presentation.vaadin.internal.TabPresentation.java

Source

/**
 * 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 org.eclipse.emf.ecp.ecview.common.editpart.IElementEditpart;
import org.eclipse.emf.ecp.ecview.common.editpart.IEmbeddableEditpart;
import org.eclipse.emf.ecp.ecview.common.editpart.emf.ElementEditpart;
import org.eclipse.emf.ecp.ecview.common.presentation.IWidgetPresentation;
import org.eclipse.emf.ecp.ecview.extension.model.extension.YTab;
import org.eclipse.emf.ecp.ecview.ui.core.editparts.extension.ITabEditpart;
import org.eclipse.emf.ecp.ecview.ui.core.editparts.extension.presentation.ITabPresentation;

import com.vaadin.ui.Component;
import com.vaadin.ui.ComponentContainer;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.TabSheet;
import com.vaadin.ui.TabSheet.Tab;

/**
 * This presenter is responsible to render a tab sheet on the given layout.
 */
public class TabPresentation extends AbstractTabPresenter<Component> implements ITabPresentation<Component> {

    private CssLayout tabContent;
    private Tab tab;
    private ModelAccess modelAccess;

    /**
     * The constructor.
     * 
     * @param editpart
     *            The editpart of that presentation.
     */
    public TabPresentation(IElementEditpart editpart) {
        super((ITabEditpart) editpart);
        this.modelAccess = new ModelAccess((YTab) editpart.getModel());
    }

    @Override
    public Component createWidget(Object parent) {
        TabSheet tabSheet = (TabSheet) parent;

        YTab yTab = (YTab) getModel();
        @SuppressWarnings("restriction")
        IEmbeddableEditpart childEditpart = ElementEditpart.getEditpart(yTab.getEmbeddable());

        CssLayout childLayout = new CssLayout();
        if (childEditpart == null) {
            tab = tabSheet.addTab(childLayout, "content missing");
            return childLayout;
        }
        IWidgetPresentation<Component> childPresentation = childEditpart.getPresentation();

        Component childContent = childPresentation.createWidget(childLayout);
        childLayout.addComponent(childContent);

        tab = tabSheet.addTab(childLayout);
        if (modelAccess.isLabelValid()) {
            tab.setCaption(modelAccess.getLabel());
        }

        return null;
    }

    @Override
    public ComponentContainer getWidget() {
        return tabContent;
    }

    @Override
    public boolean isRendered() {
        return tabContent != null;
    }

    @Override
    protected void internalDispose() {
        try {
            unrender();
        } finally {
            super.internalDispose();
        }
    }

    @Override
    public void unrender() {
        if (tab != null) {

            // unbind all active bindings
            unbind();

            YTab yTab = (YTab) getModel();
            @SuppressWarnings("restriction")
            IEmbeddableEditpart editpart = ElementEditpart.getEditpart(yTab.getEmbeddable());

            IWidgetPresentation<Component> childPresentation = editpart.getPresentation();
            childPresentation.unrender();
        }
    }

    /**
     * An internal helper class.
     */
    private static class ModelAccess {
        private final YTab yTab;

        public ModelAccess(YTab yTab) {
            super();
            this.yTab = yTab;
        }

        /**
         * @return
         * @see org.eclipse.emf.ecp.ecview.ui.core.model.core.YCssAble#getCssClass()
         */
        public String getCssClass() {
            return yTab.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 yTab.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 yTab.getDatadescription() != null && yTab.getDatadescription().getLabel() != null;
        }

        /**
         * Returns the label.
         * 
         * @return
         */
        public String getLabel() {
            return yTab.getDatadescription().getLabel();
        }
    }
}