me.uni.emuseo.view.common.form.FormPopUpWindow.java Source code

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Here is the source code for me.uni.emuseo.view.common.form.FormPopUpWindow.java

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/*******************************************************************************
 * Copyright (c) 2016 Darian Jakubik.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     Darian Jakubik - initial API and implementation
 ******************************************************************************/
package me.uni.emuseo.view.common.form;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.vaadin.data.fieldgroup.FieldGroup.CommitException;
import com.vaadin.server.FontAwesome;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.Window;

public abstract class FormPopUpWindow<T> extends Window {

    private static final long serialVersionUID = 4023778432405550695L;
    private static final Logger LOG = LoggerFactory.getLogger(FormPopUpWindow.class);
    protected FormBuilder<T> formBuilder;
    protected Button saveButton;
    protected Button cancelButton;
    protected VerticalLayout windowLayout;
    protected HorizontalLayout buttonLayout;

    public FormPopUpWindow(T bean) {
        setSizeUndefined();
        setResizable(false);
        windowLayout = new VerticalLayout();

        formBuilder = createForm(bean);
        buildButtons();

        windowLayout.setMargin(true);
        if (formBuilder != null) {
            windowLayout.addComponent(formBuilder.getContent());
            windowLayout.addComponent(buttonLayout);
        }
        setContent(windowLayout);
        setModal(true);
    }

    public FormPopUpWindow(T bean, String caption) {
        this(bean);
        setCaption(caption);
    }

    private void buildButtons() {
        ClickListener clickListener = new ClickListener() {

            private static final long serialVersionUID = 5320702365033343873L;

            @Override
            public void buttonClick(ClickEvent event) {
                Button button = event.getButton();
                if (button.equals(saveButton)) {
                    onPreSave();
                } else if (button.equals(cancelButton)) {
                    onCancel();
                }
            }
        };
        buttonLayout = new HorizontalLayout();
        saveButton = new Button();
        saveButton.addStyleName("primary");
        saveButton.setIcon(FontAwesome.SAVE);
        saveButton.addClickListener(clickListener);
        cancelButton = new Button();
        cancelButton.addStyleName("primary");
        cancelButton.setIcon(FontAwesome.UNDO);
        cancelButton.addClickListener(clickListener);
        buttonLayout.addComponent(saveButton);
        buttonLayout.addComponent(cancelButton);
        buttonLayout.setSpacing(true);
        buttonLayout.addStyleName("form-buttons");
    }

    @Override
    public void close() {
        onCancel();
    }

    protected void onCancel() {
        formBuilder.discard();
        super.close();
    }

    protected void onPreSave() {
        try {
            formBuilder.commit();
            T bean = formBuilder.getBean();
            if (onSave(bean)) {
                super.close();
            }
        } catch (CommitException | InvalidBeanException e) {
            LOG.warn("Commit failed", e);
        }
    }

    protected abstract FormBuilder<T> createForm(T bean);

    protected abstract boolean onSave(T bean) throws InvalidBeanException;

}