Java tutorial
package com.oodrive.nuage.webui; /* * #%L * Project eguan * %% * Copyright (C) 2012 - 2015 Oodrive * %% * 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 com.oodrive.nuage.webui.component.WaitingComponent; import com.oodrive.nuage.webui.component.WaitingComponent.Background; import com.oodrive.nuage.webui.component.window.ErrorWindow; import com.oodrive.nuage.webui.model.AbstractItemModel; import com.vaadin.data.Property.ValueChangeEvent; import com.vaadin.data.Property.ValueChangeListener; import com.vaadin.ui.FormLayout; import com.vaadin.ui.Notification; import com.vaadin.ui.TextField; /** * Utility class to create object attributes * * @author oodrive * @author ebredzinski * */ public final class WebUiUtils { /** * Getter and setter for operation with a long. * * */ public interface LongAttributeOperation { void setLongValue(final long value); long getLongValue(); } /** * Getter and setter for operation with an integer. * * */ public interface IntegerAttributeOperation { void setIntegerValue(final int value); int getIntegerValue(); } /** * Getter and setter for operations with a String * * */ public interface StringAttributeOperation { void setStringValue(final String value); String getStringValue(); } /** * Create a new String text field with a given setter/getter. * * @param operation * the operation to get/set the value contains in the text field. * @param fieldName * the name of the field * @param rootLayout * the layout to add the text field * @param model * the model used to get/set the value */ @SuppressWarnings({ "serial" }) public static final void createFieldString(final StringAttributeOperation operation, final String fieldName, final FormLayout rootLayout, final AbstractItemModel model) { String value = operation.getStringValue(); // Display empty string if value is null if (value == null) { value = ""; } final TextField field = new TextField(fieldName, value); field.setWidth("250px"); field.setImmediate(true); rootLayout.addComponent(field); field.addValueChangeListener(new ValueChangeListener() { @Override public void valueChange(final ValueChangeEvent event) { final String newValue = String.valueOf(event.getProperty().getValue()); final String oldValue = operation.getStringValue(); if (!newValue.equals(oldValue)) { // Set value in background (could be a long operation) WaitingComponent.executeBackground(model, new Background() { @Override public void processing() { operation.setStringValue(newValue); } @Override public void postProcessing() { Notification.show(fieldName + " changed", newValue, Notification.Type.TRAY_NOTIFICATION); } }); } } }); } /** * Create a new long text field with a given setter/getter. * * @param operation * the operation to get/set the value contains in the text field. * @param fieldName * the name of the field * @param rootLayout * the layout to add the text field * @param model * the model used to get/set the value */ @SuppressWarnings({ "serial" }) public static final void createFieldLong(final LongAttributeOperation operation, final String fieldName, final FormLayout rootLayout, final AbstractItemModel model) { final TextField field = new TextField(fieldName, Long.toString(operation.getLongValue())); field.setWidth("250px"); field.setImmediate(true); rootLayout.addComponent(field); field.addValueChangeListener(new ValueChangeListener() { @Override public void valueChange(final ValueChangeEvent event) { final String newValue = String.valueOf(event.getProperty().getValue()); final String oldValue = Long.toString(operation.getLongValue()); if (!oldValue.equals(newValue)) { try { // Cast here to check format final long longNewValue = Long.valueOf(newValue); // Set value in background (could be a long operation) WaitingComponent.executeBackground(model, new Background() { @Override public void processing() { operation.setLongValue(longNewValue); } @Override public void postProcessing() { // Get the new real value set in the model (can be different) final String newValue = Long.toString(operation.getLongValue()); Notification.show(fieldName + " changed", newValue, Notification.Type.TRAY_NOTIFICATION); // Reset the field with the new value field.setValue(newValue); } }); } catch (final NumberFormatException e) { final ErrorWindow err = new ErrorWindow("You must enter a valid number"); err.add(model); // Reset the last value field.setValue(oldValue); } } } }); } /** * Create a new integer text field with a given setter/getter. * * @param operation * the operation to get/set the value contains in the text field. * @param fieldName * the name of the field * @param rootLayout * the layout to add the text field * @param model * the model used to get/set the value */ @SuppressWarnings({ "serial" }) public static final void createFieldInteger(final IntegerAttributeOperation operation, final String fieldName, final FormLayout rootLayout, final AbstractItemModel model, final boolean emptyAllowed) { final TextField field = new TextField(fieldName, Integer.toString(operation.getIntegerValue())); field.setWidth("250px"); field.setImmediate(true); rootLayout.addComponent(field); field.addValueChangeListener(new ValueChangeListener() { @Override public void valueChange(final ValueChangeEvent event) { final String newValue = String.valueOf(event.getProperty().getValue()); final String oldValue = Integer.toString(operation.getIntegerValue()); if (!oldValue.equals(newValue)) { try { final int intNewValue; if (emptyAllowed && "".equals(newValue)) { // Empty equals 0 intNewValue = 0; } else { // Cast here to check format intNewValue = Integer.valueOf(newValue); } // Set value in background (could be a long operation) WaitingComponent.executeBackground(model, new Background() { @Override public void processing() { operation.setIntegerValue(intNewValue); } @Override public void postProcessing() { // Get the new real value set in the model (can be different) final String newValue = Integer.toString(operation.getIntegerValue()); Notification.show(fieldName + " changed", newValue, Notification.Type.TRAY_NOTIFICATION); // Reset the field with the new value field.setValue(newValue); } }); } catch (final NumberFormatException e) { final ErrorWindow err = new ErrorWindow("You must enter a valid number"); err.add(model); // Reset the last value field.setValue(oldValue); } } } }); } }