ed.cracken.pos.ui.purchases.PurchaseItemForm.java Source code

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Here is the source code for ed.cracken.pos.ui.purchases.PurchaseItemForm.java

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package ed.cracken.pos.ui.purchases;

import com.vaadin.data.Property;
import com.vaadin.data.fieldgroup.BeanFieldGroup;
import com.vaadin.data.fieldgroup.FieldGroup;
import com.vaadin.data.util.BeanItem;
import com.vaadin.event.FieldEvents;
import com.vaadin.server.Page;
import com.vaadin.ui.Button;
import com.vaadin.ui.CssLayout;
import com.vaadin.ui.Notification;
import com.vaadin.ui.TextField;
import com.vaadin.ui.VerticalLayout;
import ed.cracken.pos.ui.components.DecimalNumberField;
import ed.cracken.pos.ui.components.StyledButton;
import ed.cracken.pos.ui.seller.to.ItemTo;
import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author edcracken
 */
public final class PurchaseItemForm extends CssLayout {

    protected TextField productId;
    protected TextField description;
    protected TextField price;
    protected TextField quantity;
    protected TextField subtotal;
    protected TextField discount;

    protected Button save;
    protected Button cancel;
    protected Button delete;

    protected PurchaseItemForm form;

    private BeanFieldGroup<ItemTo> fieldGroup;

    public PurchaseItemForm(PurchaserLogic viewLogic) {

        setId("product-form");
        setStyleName("product-form-wrapper");
        addStyleName("product-form");
        VerticalLayout formLayout = new VerticalLayout();
        formLayout.setHeightUndefined();
        formLayout.setSpacing(true);
        formLayout.setStyleName("form-layout");
        formLayout.addComponent(productId = new TextField("Code"));
        formLayout.addComponent(description = new TextField("Description"));
        formLayout.addComponent(price = new DecimalNumberField("Price"));
        formLayout.addComponent(quantity = new DecimalNumberField("Quantity"));
        formLayout.addComponent(discount = new DecimalNumberField("Discount"));
        formLayout.addComponent(subtotal = new DecimalNumberField("Subtotal"));
        price.setConverter(BigDecimal.class);
        quantity.addTextChangeListener((FieldEvents.TextChangeEvent event) -> {
            if (!event.getText().isEmpty()) {
                try {
                    NumberFormat nf = DecimalFormat.getInstance();
                    nf.setMaximumFractionDigits(2);

                    ItemTo item;
                    BigDecimal r = BigDecimal.valueOf(nf.parse(event.getText()).longValue())
                            .multiply((item = fieldGroup.getItemDataSource().getBean()).getPrice());
                    subtotal.setReadOnly(false);

                    subtotal.setValue(nf.format(r.doubleValue()));
                    subtotal.setReadOnly(true);
                } catch (ParseException ex) {
                    Logger.getLogger(PurchaseItemForm.class.getName()).log(Level.SEVERE, null, ex);
                }
            }
        });

        CssLayout separator = new CssLayout();
        separator.setStyleName("expander");
        formLayout.addComponent(separator);
        formLayout.addComponent(save = new StyledButton("Aplicar", "primary", "save"));
        formLayout.addComponent(cancel = new StyledButton("Cancelar", "cancel", "cancel"));
        formLayout.addComponent(delete = new StyledButton("Quitar", "danger", "delete"));
        save.addClickListener((Button.ClickEvent event) -> {
            try {
                fieldGroup.commit();
                viewLogic.updateItem(fieldGroup.getItemDataSource().getBean());
            } catch (FieldGroup.CommitException e) {
                e.printStackTrace(System.err);
            }
        });
        cancel.addClickListener((Button.ClickEvent event) -> {
            viewLogic.cancelItemChanges();
        });
        delete.addClickListener((Button.ClickEvent event) -> {
            viewLogic.removeItem(fieldGroup.getItemDataSource().getBean());
        });

        addComponent(formLayout);
        configBinding();
    }

    public void editItem(ItemTo product) {
        if (product == null) {
            product = new ItemTo();
        }
        fieldGroup.setItemDataSource(new BeanItem<ItemTo>(product));

        productId.setValidationVisible(false);
        description.setValidationVisible(false);
        price.setValidationVisible(false);
        discount.setValidationVisible(false);
        subtotal.setValidationVisible(false);

        productId.setReadOnly(true);
        description.setReadOnly(true);
        price.setReadOnly(true);
        discount.setReadOnly(true);
        subtotal.setReadOnly(true);

        String scrollScript = "window.document.getElementById('" + getId() + "').scrollTop = 0;";
        Page.getCurrent().getJavaScript().execute(scrollScript);
    }

    private void formHasChanged() {
        description.setValidationVisible(true);
        delete.setEnabled(true);
    }

    private void configBinding() {
        fieldGroup = new BeanFieldGroup<>(ItemTo.class);
        fieldGroup.bindMemberFields(this);

        Property.ValueChangeListener valueListener = (Property.ValueChangeEvent event) -> {
            formHasChanged();
        };
        fieldGroup.getFields().stream().forEach((f) -> {
            f.addValueChangeListener(valueListener);
        });

        save.addClickListener((Button.ClickEvent event) -> {
            try {
                fieldGroup.commit();
                // update grid item
            } catch (FieldGroup.CommitException e) {
                Notification n = new Notification("Please re-check the fields", Notification.Type.ERROR_MESSAGE);
                n.setDelayMsec(500);
                n.show(getUI().getPage());
            }
        });

        cancel.addClickListener((Button.ClickEvent event) -> {
            // just cancel
        });

        delete.addClickListener((Button.ClickEvent event) -> {
            //remove from list
        });
    }

}