Form Conditionally Required Sample(RequiredIfValidator) (Smart GWT)
/*
* 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.types.TitleOrientation;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.IButton;
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.ToolbarItem;
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;
public class Showcase implements EntryPoint {
public void onModuleLoad() {
RootPanel.get().add(getViewPanel());
}
public Canvas getViewPanel() {
final DynamicForm form = new DynamicForm();
form.setWidth(250);
form.setTitleOrientation(TitleOrientation.TOP);
ToolbarItem toolbarItem = new ToolbarItem();
IButton button = new IButton("First");
IButton button2 = new IButton("Second");
toolbarItem.setButtons(button, button2);
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(toolbarItem, radioGroupItem, textItem, buttonItem);
return form;
}
}
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