Question

Let’s say I have two forms: form1 and form2.

After pressing a NEXT_COMMAND in form1, I need to change the value of the gauge in form2 and then show form2. Thus:

public void commandAction(Command command, Displayable displayable) {
....
else if (displayable == form1) {
    if (command == NEXT_COMMAND) {
        form2_gauge.setValue(value);
        display.setCurrent(form2);
    }
....
}
....

However, this doesn’t work as I expected it to. It doesn’t change a thing at first. On the other hand, if I go back from form2 to form1 and then again from form1 to form2 it would work.

I can’t figure it out myself. I’d be enormously grateful of any possible help.

Thanks!

Answer 1

It seems to me that form2.gauge isn’t correct here. You have to save the Gauge object like this:

Gauge form2_gauge([...]);
form2.append(form2_gauge);

Then your code would be:

[...]
    form2_gauge.setValue(value);
    display.setCurrent(form2);
[...]

Have you tried another sequence? Like this:
display.setCurrent(form2);
form2_gauge.setValue(value);
I don’t think it would change anything, but may make it work.