actionlistener for selectBooleanCheckbox doubt? (JSF forum at Coderanch)

Post by: Gopu Akraju , Ranch Hand

Aug 27, 2008 03:03:00

I have a doubt. I have a textbox and checkbox in my jsp page. I want to write a action listener to my check box. If I uncheck my checkbox of type selectBooleanCheckbox, then I want to disble the textbox so that the usercan't input into the textbox and if the user checks on the checkbox, then I want to able the textbox with some initial values. Is it possible to do like this for selectBooleanCheckbox type? please let me know.

Regards

Post by: Bauke Scholtz , Ranch Hand

Aug 27, 2008 06:36:00

No need for an actionlistener. Just submit the form onclick and use the checkbox value in the disabled attribute.

JSF

MyBean
[ August 27, 2008: Message edited by: Bauke Scholtz ]

Post by: Gopu Akraju , Ranch Hand

Aug 28, 2008 03:35:00

Thanks Bauke. It works. Suppose, if I want to display the status of the checkbox as true or false, how do I do that.
I tried as below:

But it prints as below:

basically .toString doesn't convert it into true or false. Please let me know. Thanks.

Post by: Bauke Scholtz , Ranch Hand

Aug 28, 2008 05:53:00

Use UIInput#getValue(). Using Object#toString() just returns the classname and hashcode, you should know that better. Always read the API documentation before asking this kind of trival questions: http://java.sun.com/javaee/5/docs/api/javax/faces/component/html/HtmlSelectBooleanCheckbox.html

You can also add a valuebinding to it, e.g. value="#{myBean.status}" which maps to a boolean property. But don't use it in the disabled attribute, it won't work due to the timing in the JSF lifecycle when the property value is get/set.
[ August 28, 2008: Message edited by: Bauke Scholtz ]

Post by: Gopu Akraju , Ranch Hand

Sep 01, 2008 03:34:00

Hi Thanks for your response.

When I try to change the checkbox status and then submit the form, basically calling another page through a java method, I am not able to navigate to the next page.

Where as I am able to navigate without changing the checkbox status? Why is it so? How to rectify?

Page1 gets the user input and page2 just displays the user. I am able to display the user input into second page if I don't alter the checkbox status. But if I change the checkbox status, if I press submit button on the first page, it is not navigating to the second page. Can anyone tell me why? This is just a simple example I have started playing around with jsf. But I think when the page gets refreshed when I change the checkbox, something happens which prevents from navigating. As a beginner, I am not able to overcome this problem. Please let me know.

page1.jsp

<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t" %>
<f:view>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>pipeline</title>
</head>
<body>
<h:form id="myForm">
<h:panelGrid columns="1" cellpadding="10" width="90%" border="1">
<h:panelGrid columns="7" border="1">
<h:outputLabel for="runNumber">
<h:outputText value="Run Number:"/>
</h:outputLabel>
<h:selectOneMenu id="runNumber" value="#{UserBean.selectRun}">
<f:selectItems value="#{UserBean.runNumber}"/>
</h:selectOneMenu>
<h:outputLabel for="checkBox">
<h:outputText value="Analysis:"/>
</h:outputLabel>
<h:column>
<h:selectBooleanCheckbox binding="#{UserBean.checkbox}" [I]onclick[/I]="submit()" />
</h:column>
<h:outputLabel for="text">
<h:outputText value="text1:"/>
</h:outputLabel>
<h:inputText value="#{UserBean.text1}" id="text1" disabled="#{!UserBean.checkbox.value}" />
</h:panelGrid>
<h:commandButton action="#{UserBean.populateAction}" value="Submit">
</h:commandButton>/>
</h:panelGrid>
</h:form>
</body>
</html>
</f:view>

page2.jsp

<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t" %>
<f:view>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>UPDATED</title>
<link rel="stylesheet" type="text/css" href="images/style.css"/>
</head>
<body>
<h1>Data has been updated</h1>
<h:form>
<h:panelGrid columns="1" cellpadding="10" width="90%" border="1">
<h:panelGrid columns="2" border="1">
<h:outputLabel for="runNumber">
<h:outputText value="Run Number:"/>
</h:outputLabel>
<h:outputText value="#{UserBean.selectRun}" />
<h:outputLabel for="analysis">
<h:outputText value="Analysis:"/>
</h:outputLabel>
<h:outputText value="#{UserBean.checkselected}" />
<h:outputLabel for="text1">
<h:outputText value="text1:"/>
</h:outputLabel>
<h:outputText value="#{UserBean.text1}" />
</h:panelGrid>
</h:panelGrid>
</h:form>
</body>
</html>
</f:view>

UserBean.java

public class UserBean {
private String selectRun;
private String checkselected;
private String text1= "ABC";
private String input;
private HtmlSelectBooleanCheckbox checkbox;
/** Creates a new instance of UserBean */
public UserBean() {
}
public String getSelectRun() {
return selectRun;
}
..getter and setters
public String getCheckselected(){
String test = this.getCheckbox().toString();
return test;
}
public String populateAction() {
String test = this.getSelectRun();
System.out.println("The value of selected RUN:"+test);
Pattern pattern = Pattern.compile(patternStr);
Matcher matcher = pattern.matcher(test);
String testing = this.getCheckbox().getValue().toString();
System.out.println("The value of checkbox is :"+ testing);
return "page2";
}
public String getText1() {
return text1;
}
public void setUseText11(String useBases_1) {
this.text1 = text1;
}
public void submit() {
System.out.println("input: " + input);
}
public HtmlSelectBooleanCheckbox getCheckbox() {
return checkbox;
}
public void setCheckbox(HtmlSelectBooleanCheckbox checkbox) {
this.checkbox = checkbox;
}
}

And more over I am trying to clear the text box to null if checkbox is Where should I mention?

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