/* * Smart GWT (GWT for SmartClient) * Copyright 2008 and beyond, Isomorphic Software, Inc. * * Smart GWT 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. Smart GWT 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. */ import com.smartgwt.client.types.TitleOrientation; import com.smartgwt.client.widgets.Canvas; import com.smartgwt.client.widgets.form.DynamicForm; import com.smartgwt.client.widgets.form.fields.ButtonItem; import com.smartgwt.client.widgets.form.fields.FormItem; import com.smartgwt.client.widgets.form.fields.RadioGroupItem; import com.smartgwt.client.widgets.form.fields.TextItem; import com.smartgwt.client.widgets.form.fields.events.ClickEvent; import com.smartgwt.client.widgets.form.validator.RequiredIfFunction; import com.smartgwt.client.widgets.form.validator.RequiredIfValidator; import com.google.gwt.core.client.EntryPoint; public class FormConditionallyRequiredSample implements EntryPoint { public void onModuleLoad() { final DynamicForm form = new DynamicForm(); form.setWidth(250); form.setTitleOrientation(TitleOrientation.TOP); final RadioGroupItem radioGroupItem = new RadioGroupItem(); radioGroupItem.setName("willAttend"); radioGroupItem.setColSpan("*"); radioGroupItem.setRequired(true); radioGroupItem.setVertical(false); radioGroupItem.setValueMap("Yes", "No"); radioGroupItem.setRedrawOnChange(true); radioGroupItem.setTitle("Will you be attending the meeting on April 4th? If no, please provide a reason"); TextItem textItem = new TextItem(); textItem.setName("reason"); textItem.setTitle("Reason"); RequiredIfValidator ifValidator = new RequiredIfValidator(); ifValidator.setExpression(new RequiredIfFunction() { public boolean execute(FormItem formItem, Object value) { String valueStr = (String) radioGroupItem.getValue(); return "No".equals(valueStr); } }); ifValidator.setErrorMessage("Please provide a reason"); textItem.setValidators(ifValidator); ButtonItem buttonItem = new ButtonItem("validate", "Validate"); buttonItem.addClickHandler(new com.smartgwt.client.widgets.form.fields.events.ClickHandler() { public void onClick(ClickEvent event) { form.validate(); } }); form.setFields(radioGroupItem, textItem, buttonItem); form.draw(); } }