GWT Java

/*
 * SmartGWT (GWT for SmartClient)
 * Copyright 2008 and beyond, Isomorphic Software, Inc.
 *
 * SmartGWT is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.  SmartGWT is also
 * available under typical commercial license terms - see
 * http://smartclient.com/license
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 */
package com.smartgwt.sample.showcase.client;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.user.client.ui.RootPanel;
import com.smartgwt.client.data.Criteria;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.fields.DataSourceBooleanField;
import com.smartgwt.client.data.fields.DataSourceDateField;
import com.smartgwt.client.data.fields.DataSourceEnumField;
import com.smartgwt.client.data.fields.DataSourceFloatField;
import com.smartgwt.client.data.fields.DataSourceIntegerField;
import com.smartgwt.client.data.fields.DataSourceLinkField;
import com.smartgwt.client.data.fields.DataSourceTextField;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.SelectItem;
import com.smartgwt.client.widgets.form.fields.events.ChangedEvent;
import com.smartgwt.client.widgets.form.fields.events.ChangedHandler;
import com.smartgwt.client.widgets.form.validator.FloatPrecisionValidator;
import com.smartgwt.client.widgets.form.validator.FloatRangeValidator;
public class Showcase implements EntryPoint {
  public void onModuleLoad() {
    RootPanel.get().add(getViewPanel());
  }
  public Canvas getViewPanel() {
    final DynamicForm form = new DynamicForm();
    form.setWidth(500);
    form.setNumCols(4);
    DataSource itemSupplyDS = ItemSupplyXmlDS.getInstance();
    DataSource supplyCategoryDS = SupplyCategoryXmlDS.getInstance();
    final SelectItem categoryItem = new SelectItem();
    categoryItem.setName("categoryName");
    categoryItem.setPickListWidth(210);
    categoryItem.setTitle("Category");
    categoryItem.setOptionDataSource(supplyCategoryDS);
    categoryItem.addChangedHandler(new ChangedHandler() {
      public void onChanged(ChangedEvent event) {
        form.clearValue("itemName");
      }
    });
    SelectItem itemName = new SelectItem() {
      protected Criteria getPickListFilterCriteria() {
        String category = (String) categoryItem.getValue();
        Criteria criteria = new Criteria("category", category);
        return criteria;
      }
    };
    itemName.setName("itemName");
    itemName.setTitle("Item");
    itemName.setPickListWidth(250);
    itemName.setOptionDataSource(itemSupplyDS);
    form.setItems(categoryItem, itemName);
    return form;
  }
}
class SupplyCategoryXmlDS extends DataSource {
  private static SupplyCategoryXmlDS instance = null;
  public static SupplyCategoryXmlDS getInstance() {
      if (instance == null) {
          instance = new SupplyCategoryXmlDS("supplyCategoryDS");
      }
      return instance;
  }
  public SupplyCategoryXmlDS(String id) {
      setID(id);
      setRecordXPath("/List/supplyCategory");
      DataSourceTextField itemNameField = new DataSourceTextField("categoryName", "Item", 128, true);
      itemNameField.setPrimaryKey(true);
      DataSourceTextField parentField = new DataSourceTextField("parentID", null);
      parentField.setHidden(true);
      parentField.setRequired(true);
      parentField.setRootValue("root");
      parentField.setForeignKey("supplyCategoryDS.categoryName");
      setFields(itemNameField, parentField);
      setDataURL("ds/test_data/supplyCategory.data.xml");
      
      setClientOnly(true);
  }
}
class ItemSupplyXmlDS extends DataSource {
  private static ItemSupplyXmlDS instance = null;
  public static ItemSupplyXmlDS getInstance() {
    if (instance == null) {
      instance = new ItemSupplyXmlDS("supplyItemDS");
    }
    return instance;
  }
  public ItemSupplyXmlDS(String id) {
    setID(id);
    setRecordXPath("/List/supplyItem");
    DataSourceIntegerField pkField = new DataSourceIntegerField("itemID");
    pkField.setHidden(true);
    pkField.setPrimaryKey(true);
    DataSourceTextField itemNameField = new DataSourceTextField("itemName", "Item Name", 128, true);
    DataSourceTextField skuField = new DataSourceTextField("SKU", "SKU", 10, true);
    DataSourceTextField descriptionField = new DataSourceTextField("description", "Description",
        2000);
    DataSourceTextField categoryField = new DataSourceTextField("category", "Category", 128, true);
    categoryField.setForeignKey("supplyCategoryDS.categoryName");
    DataSourceEnumField unitsField = new DataSourceEnumField("units", "Units", 5);
    unitsField.setValueMap("Roll", "Ea", "Pkt", "Set", "Tube", "Pad", "Ream", "Tin", "Bag", "Ctn",
        "Box");
    DataSourceFloatField unitCostField = new DataSourceFloatField("unitCost", "Unit Cost", 5);
    FloatRangeValidator rangeValidator = new FloatRangeValidator();
    rangeValidator.setMin(0);
    rangeValidator.setErrorMessage("Please enter a valid (positive) cost");
    FloatPrecisionValidator precisionValidator = new FloatPrecisionValidator();
    precisionValidator.setPrecision(2);
    precisionValidator.setErrorMessage("The maximum allowed precision is 2");
    unitCostField.setValidators(rangeValidator, precisionValidator);
    DataSourceBooleanField inStockField = new DataSourceBooleanField("inStock", "In Stock");
    DataSourceDateField nextShipmentField = new DataSourceDateField("nextShipment", "Next Shipment");
    setFields(pkField, itemNameField, skuField, descriptionField, categoryField, unitsField,
        unitCostField, inStockField, nextShipmentField);
    setDataURL("ds/test_data/supplyItem.data.xml");
    setClientOnly(true);
  }
}
class CountryXmlDS extends DataSource {
  private static CountryXmlDS instance = null;
  public static CountryXmlDS getInstance() {
    if (instance == null) {
      instance = new CountryXmlDS("countryDS");
    }
    return instance;
  }
  public CountryXmlDS(String id) {
    setID(id);
    setRecordXPath("/List/country");
    DataSourceIntegerField pkField = new DataSourceIntegerField("pk");
    pkField.setHidden(true);
    pkField.setPrimaryKey(true);
    DataSourceTextField countryCodeField = new DataSourceTextField("countryCode", "Code");
    countryCodeField.setRequired(true);
    DataSourceTextField countryNameField = new DataSourceTextField("countryName", "Country");
    countryNameField.setRequired(true);
    DataSourceTextField capitalField = new DataSourceTextField("capital", "Capital");
    DataSourceTextField governmentField = new DataSourceTextField("government", "Government", 500);
    DataSourceBooleanField memberG8Field = new DataSourceBooleanField("member_g8", "G8");
    DataSourceTextField continentField = new DataSourceTextField("continent", "Continent");
    continentField.setValueMap("Europe", "Asia", "North America", "Australia/Oceania",
        "South America", "Africa");
    DataSourceDateField independenceField = new DataSourceDateField("independence", "Nationhood");
    DataSourceFloatField areaField = new DataSourceFloatField("area", "Area (km²)");
    DataSourceIntegerField populationField = new DataSourceIntegerField("population", "Population");
    DataSourceFloatField gdpField = new DataSourceFloatField("gdp", "GDP ($M)");
    DataSourceLinkField articleField = new DataSourceLinkField("article", "Info");
    setFields(pkField, countryCodeField, countryNameField, capitalField, governmentField,
        memberG8Field, continentField, independenceField, areaField, populationField, gdpField,
        articleField);
    setDataURL("ds/test_data/country.data.xml");
    setClientOnly(true);
  }
}
   
    
    
  
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