smartGWT dome form Validator

表单验证

/* 
 * 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.data.DataSource;  
import com.smartgwt.client.data.fields.DataSourcePasswordField;  
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.ButtonItem;  
import com.smartgwt.client.widgets.form.fields.CheckboxItem;  
import com.smartgwt.client.widgets.form.fields.HeaderItem;  
import com.smartgwt.client.widgets.form.fields.PasswordItem;  
import com.smartgwt.client.widgets.form.fields.events.ClickEvent;  
import com.smartgwt.client.widgets.form.fields.events.ClickHandler;  
import com.smartgwt.client.widgets.form.validator.MatchesFieldValidator;  
import com.smartgwt.client.widgets.form.validator.RegExpValidator;  

public class FormDataBindingSample implements EntryPoint {  

    public void onModuleLoad() {  

        DataSource dataSource = new DataSource();  

        DataSourceTextField firstNameField = new DataSourceTextField("firstName", "First Name", 50, true);  
        DataSourceTextField lastNameField = new DataSourceTextField("lastName", "Last Name", 50, true);  
        DataSourceTextField emailField = new DataSourceTextField("email", "Email", 100, true);  

        RegExpValidator emailValidator = new RegExpValidator();  
        emailValidator.setErrorMessage("Invalid email address");  
        emailValidator.setExpression("^([a-zA-Z0-9_.\\-+])+@(([a-zA-Z0-9\\-])+\\.)+[a-zA-Z0-9]{2,4}$");  

        emailField.setValidators(emailValidator);  

        DataSourcePasswordField passwordField = new DataSourcePasswordField("password", "Password", 20, true);  

        dataSource.setFields(firstNameField, lastNameField, emailField, passwordField);  

        final DynamicForm form = new DynamicForm();  
        form.setDataSource(dataSource);  
        form.setUseAllDataSourceFields(true);  

        HeaderItem header = new HeaderItem();  
        header.setDefaultValue("Registration Form");  

        PasswordItem passwordItem = new PasswordItem();  
        passwordItem.setName("password");  

        PasswordItem passwordItem2 = new PasswordItem();  
        passwordItem2.setName("password2");  
        passwordItem2.setTitle("Password Again");  
        passwordItem2.setRequired(true);  
        passwordItem2.setLength(20);  

        MatchesFieldValidator matchesValidator = new MatchesFieldValidator();  
        matchesValidator.setOtherField("password");  
        matchesValidator.setErrorMessage("Passwords do not match");          
        passwordItem2.setValidators(matchesValidator);  

        CheckboxItem acceptItem = new CheckboxItem();  
        acceptItem.setName("acceptTerms");  
        acceptItem.setTitle("I accept the terms of use.");  
        acceptItem.setRequired(true);  
        acceptItem.setWidth(150);  

        ButtonItem validateItem = new ButtonItem();  
        validateItem.setTitle("Validate");  
        validateItem.addClickHandler(new ClickHandler() {  
            public void onClick(ClickEvent event) {  
                form.validate(false);  
            }  
        });  

        form.setFields(header, passwordItem, passwordItem2, acceptItem, validateItem);  

        form.setValue("firstName", "Bob");  
        form.setValue("email", "bob@.com");  
        form.setValue("password", "sekrit");  
        form.setValue("password2", "fatfinger");      

        form.draw();  
    }  

}