com.mcparland.john.vaadin_mvn_arch.samples.crud.SampleCrudView.java Source code

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Here is the source code for com.mcparland.john.vaadin_mvn_arch.samples.crud.SampleCrudView.java

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package com.mcparland.john.vaadin_mvn_arch.samples.crud;

/*
 * #%L
 * vaadin_mvn_arch-ui
 * %%
 * Copyright (C) 2014 John McParland
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.util.Collection;

import com.mcparland.john.vaadin_mvn_arch.samples.ResetButtonForTextField;
import com.mcparland.john.vaadin_mvn_arch.samples.backend.DataService;
import com.mcparland.john.vaadin_mvn_arch.samples.backend.data.Product;

import com.vaadin.data.Property.ValueChangeEvent;
import com.vaadin.data.Property.ValueChangeListener;
import com.vaadin.data.util.BeanItemContainer;
import com.vaadin.event.FieldEvents;
import com.vaadin.navigator.View;
import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent;
import com.vaadin.server.FontAwesome;
import com.vaadin.ui.Alignment;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Button.ClickListener;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.HorizontalLayout;
import com.vaadin.ui.Notification;
import com.vaadin.ui.Notification.Type;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import com.vaadin.ui.themes.ValoTheme;

/**
 * A view for performing create-read-update-delete operations on products.
 *
 * See also {@link SampleCrudLogic} for fetching the data, the actual CRUD
 * operations and controlling the view based on events from outside.
 */
public class SampleCrudView extends CssLayout implements View {

    /**
     * The serialVersionUID.
     */
    private static final long serialVersionUID = 1L;
    public static final String VIEW_NAME = "Inventory";
    private ProductTable table;
    private ProductForm form;

    private SampleCrudLogic viewLogic = new SampleCrudLogic(this);
    private Button newProduct;

    public SampleCrudView() {
        setSizeFull();
        addStyleName("crud-view");
        HorizontalLayout topLayout = createTopBar();

        table = new ProductTable();
        table.addValueChangeListener(new ValueChangeListener() {
            /**
             * The serialVersionUID.
             */
            private static final long serialVersionUID = 1L;

            @Override
            public void valueChange(ValueChangeEvent event) {
                viewLogic.rowSelected(table.getValue());
            }
        });

        form = new ProductForm(viewLogic);
        form.setCategories(DataService.get().getAllCategories());

        VerticalLayout barAndTableLayout = new VerticalLayout();
        barAndTableLayout.addComponent(topLayout);
        barAndTableLayout.addComponent(table);
        barAndTableLayout.setMargin(true);
        barAndTableLayout.setSpacing(true);
        barAndTableLayout.setSizeFull();
        barAndTableLayout.setExpandRatio(table, 1);
        barAndTableLayout.setStyleName("crud-main-layout");

        addComponent(barAndTableLayout);
        addComponent(form);

        viewLogic.init();
    }

    public HorizontalLayout createTopBar() {
        TextField filter = new TextField();
        filter.setStyleName("filter-textfield");
        filter.setInputPrompt("Filter");
        ResetButtonForTextField.extend(filter);
        filter.setImmediate(true);
        filter.addTextChangeListener(new FieldEvents.TextChangeListener() {
            /**
             * The serialVersionUID.
             */
            private static final long serialVersionUID = 1L;

            @Override
            public void textChange(FieldEvents.TextChangeEvent event) {
                table.setFilter(event.getText());
            }
        });

        newProduct = new Button("New product");
        newProduct.addStyleName(ValoTheme.BUTTON_PRIMARY);
        newProduct.setIcon(FontAwesome.PLUS_CIRCLE);
        newProduct.addClickListener(new ClickListener() {
            /**
             * The serialVersionUID.
             */
            private static final long serialVersionUID = 1L;

            @Override
            public void buttonClick(ClickEvent event) {
                viewLogic.newProduct();
            }
        });

        HorizontalLayout topLayout = new HorizontalLayout();
        topLayout.setSpacing(true);
        topLayout.setWidth("100%");
        topLayout.addComponent(filter);
        topLayout.addComponent(newProduct);
        topLayout.setComponentAlignment(filter, Alignment.MIDDLE_LEFT);
        topLayout.setExpandRatio(filter, 1);
        topLayout.setStyleName("top-bar");
        return topLayout;
    }

    @Override
    public void enter(ViewChangeEvent event) {
        viewLogic.enter(event.getParameters());
    }

    public void showError(String msg) {
        Notification.show(msg, Type.ERROR_MESSAGE);
    }

    public void showSaveNotification(String msg) {
        Notification.show(msg, Type.TRAY_NOTIFICATION);
    }

    public void setNewProductEnabled(boolean enabled) {
        newProduct.setEnabled(enabled);
    }

    public void clearSelection() {
        table.setValue(null);
    }

    public void selectRow(Product row) {
        table.setValue(row);
    }

    public void editProduct(Product product) {
        if (product != null) {
            form.addStyleName("visible");
            form.setEnabled(true);
        } else {
            form.removeStyleName("visible");
            form.setEnabled(false);
        }
        form.editProduct(product);
    }

    public Product getSelectedRow() {
        return table.getValue();
    }

    public void showProducts(Collection<Product> products) {
        BeanItemContainer<Product> container = table.getContainerDataSource();
        container.removeAllItems();
        container.addAll(products);
    }

}