Programatically rendering popups at runtime

Question

Jdev 11.1.2.3.0
I am having problems with popup...
I want to create a popup that displays information programatically depending on the action of a user. what I did:
1. I created an af:popup (popupMess1) in an adf page. In it, I inserted an ad:dialog. in the af:dialog(dialogMess1), I inserted an active output text(testMess1) ,My aim is that the value of the active out text (testMess1) will change depending on the action of the user. For instance, the program checks to see if the value of the main code is null
2. In my managed bean, this is how I implemented it, however, when I ran the program, it gave me java.lang.NullPointerException
        RichPopup.PopupHints ph = new RichPopup.PopupHints();
        ////check the main code
        if (this.getMainCodeId().getValue() == null) {
            this.testMess1.setValue("Invalid Main Code. Enter a valid main code !!!");
            popupMess1.show(ph);
            return (false);
3. When I set the value of the output text (testMess1)n on the property inspector  to "Invalid Main Code. Enter a valid main code" and commented it out in my managed bean, it displays properly
            //this.testMess1.setValue("Invalid Main Code. Enter a valid main code !!!");
            popupMess1.show(ph);

Answer 1

Frank,
if you get a NPE it would help us if you could tell us where you get it.
From the reat of your code I get that you bind components to the bean you use to set the values. Binding components is only allowed if the scope of the bean is backingBean scope or request scope. Which scope are your bean in?
The easiest way around this problem is not to set the value of the component from the bean, but to set the inputText to store it's value in a e.g. pageDef variable (Creating Variables and Attribute Bindings to Store Values Temporarily in the PageDef | JDev & ADF Goodies)
then change the pagedef variable from your bean.
Next you should set the content delivery of the popup to lazyUncached as it otherwise will read the data only once when the page is rendered the first time.
Timo