org.lunifera.web.ecp.uimodel.presentation.vaadin.internal.TextFieldPresentation.java Source code

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Here is the source code for org.lunifera.web.ecp.uimodel.presentation.vaadin.internal.TextFieldPresentation.java

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/**
 * Copyright (c) 2012 Florian Pirchner (Vienna, Austria) and others.
 * 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 API and implementation
 */
package org.lunifera.web.ecp.uimodel.presentation.vaadin.internal;

import org.eclipse.emf.ecp.ecview.common.editpart.IElementEditpart;
import org.eclipse.emf.ecp.ecview.common.model.core.util.CoreModelUtil;
import org.eclipse.emf.ecp.ecview.extension.model.extension.YTextField;
import org.eclipse.emf.ecp.ecview.ui.core.editparts.extension.ITextFieldEditpart;

import com.vaadin.ui.Component;
import com.vaadin.ui.ComponentContainer;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.TextField;

/**
 * This presenter is responsible to render a text field on the given layout.
 */
public class TextFieldPresentation extends AbstractVaadinWidgetPresenter<Component> {

    private final ModelAccess modelAccess;
    private CssLayout componentBase;
    private TextField text;

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

    /**
     * {@inheritDoc}
     */
    @Override
    public Component createWidget(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());
            }

            text = new TextField();
            text.addStyleName(CSS_CLASS__CONTROL);
            text.setSizeFull();

            // creates the binding for the field
            createBindings(modelAccess.yText, text);

            componentBase.addComponent(text);

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

            if (modelAccess.isLabelValid()) {
                text.setCaption(modelAccess.getLabel());
            }
        }
        return componentBase;
    }

    /**
     * Creates the bindings for the given values.
     * 
     * @param yField
     * @param field
     */
    protected void createBindings(YTextField yField, TextField field) {
        super.createBindings(yField, field);
    }

    @Override
    public Component getWidget() {
        return componentBase;
    }

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

    /**
     * {@inheritDoc}
     */
    @Override
    public void unrender() {
        if (componentBase != null) {
            ComponentContainer parent = ((ComponentContainer) componentBase.getParent());
            if (parent != null) {
                parent.removeComponent(componentBase);
            }
            componentBase = null;
            text = null;
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    protected void internalDispose() {
        // unrender the ui component
        unrender();
    }

    /**
     * A helper class.
     */
    private static class ModelAccess {
        private final YTextField yText;

        public ModelAccess(YTextField yText) {
            super();
            this.yText = yText;
        }

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

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