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

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

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/**
 * Copyright (c) 2013 COMPEX Systemhaus GmbH 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: Jose C. Dominguez - initial API and implementation
 */
package org.lunifera.runtime.web.ecview.presentation.vaadin.internal;

import java.util.ArrayList;
import java.util.Locale;

import org.eclipse.emf.ecp.ecview.common.context.II18nService;
import org.eclipse.emf.ecp.ecview.common.editpart.IElementEditpart;
import org.eclipse.emf.ecp.ecview.extension.model.extension.YButton;
import org.eclipse.emf.ecp.ecview.extension.model.extension.listener.YButtonClickListener;
import org.eclipse.emf.ecp.ecview.ui.core.editparts.extension.IButtonEditpart;

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

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

    private final ModelAccess modelAccess;
    private CssLayout componentBase;
    private Button button;

    /**
     * Constructor.
     * 
     * @param editpart
     *            The editpart of that presenter
     */
    public ButtonPresentation(IElementEditpart editpart) {
        super((IButtonEditpart) editpart);
        this.modelAccess = new ModelAccess((YButton) 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.yButton);

            button = new Button();
            button.addStyleName(CSS_CLASS_CONTROL);
            button.setImmediate(true);

            associateWidget(button, modelAccess.yButton);

            // creates the binding for the field
            createBindings(modelAccess.yButton, button);

            componentBase.addComponent(button);

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

            applyCaptions();

        }
        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()) {
            button.setCaption(service.getValue(modelAccess.getLabelI18nKey(), getLocale()));
        } else {
            if (modelAccess.isLabelValid()) {
                button.setCaption(modelAccess.getLabel());
            }
        }
    }

    /**
     * Creates the bindings for the given values.
     * 
     * @param yButton
     * @param button
     */
    @SuppressWarnings("serial")
    protected void createBindings(final YButton yButton, Button button) {
        super.createBindings(yButton, button, componentBase);

        button.addClickListener(new Button.ClickListener() {
            @Override
            public void buttonClick(Button.ClickEvent event) {
                for (YButtonClickListener listener : new ArrayList<YButtonClickListener>(
                        yButton.getClickListeners())) {
                    listener.clicked(yButton);
                }
            }
        });

    }

    @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(button);

            componentBase = null;
            button = null;
        }
    }

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

    /**
     * A helper class.
     */
    private static class ModelAccess {
        private final YButton yButton;

        public ModelAccess(YButton yButton) {
            super();
            this.yButton = yButton;
        }

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

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

        /**
         * Returns true, if the label is valid.
         * 
         * @return
         */
        public boolean isLabelI18nKeyValid() {
            return yButton.getDatadescription() != null && yButton.getDatadescription().getLabelI18nKey() != null;
        }

        /**
         * Returns the label.
         * 
         * @return
         */
        public String getLabelI18nKey() {
            return yButton.getDatadescription().getLabelI18nKey();
        }
    }
}