Bug? Views are not ready but their events are triggered

[LucaMs]

This is nothing new and I know what somersaults I have to do to get around this obstacle but if Erel could remedy this problem...!

By running a B4XPages.Show(SomePageID) command, the B4XPage_Created event routine of that page is correctly and immediately executed and the layout loaded (or, more precisely, within that event I write the code to load the layout). Events like TextChanged, in my case of B4XFloatTextFields, are triggered immediately, but the views are not yet available, actually created, and this is a problem.

Concrete example: I want to enable/disable a button based on the text contained in some B4XFloatTextFields, i.e. if the user has filled in those fields and with valid values.

I am attaching an example. Again, I know how to get around this problem but it would be better if it didn't exist.


P.S. I also have to act on those views for other reasons and obviously the problem is the same.

 

[LucaMs]

The problem is due precisely to the B4XFloatTextFields; in fact, replacing them with normal EditTexts, the events are not triggered without user intervention.

Furthermore, the EditText are also available in the Created as soon as the layout is loaded, unlike the B4XFloatTextField.TextField.

 

[Marvel]

I also had this problem in the past. I solved it by using Boolean. Had no idea it was caused by B4XFloatTextFields in B4xpages

 

[angel_]

I think my problem in this thread is related to that:

Reduce the time to start the app

I have an app that if I use B4XPages.AddPageAndCreate for each page it takes too long, I have tried to use Splash but the time is still high, I think the problem is that after loading the design I fill in the fields (the event is launched) and in each field I recalculate and there are many...

www.b4x.com

In this app I only use B4XFloatTextField.
I also solved it with a Boolean

 

[LucaMs]

I think my problem in this thread is related to that:

Reduce the time to start the app

I have an app that if I use B4XPages.AddPageAndCreate for each page it takes too long, I have tried to use Splash but the time is still high, I think the problem is that after loading the design I fill in the fields (the event is launched) and in each field I recalculate and there are many...

www.b4x.com

In this app I only use B4XFloatTextField.
I also solved it with a Boolean

It's not a question of loading time; as you can see the attached test project contains practically nothing and yet the problem is there.

The fact is that those events are triggered before the B4XFloatTextFields have actually been created and this, strangely, happens only when the B4XPage_Created event is completed.

Wanting to access those views after the completion of B4XPage_Created, you could call a routine from within this one using CallSubDelayed, but the B4XPage_Appear event would fire before that routine.

I too had to solve with a module-level boolean variable (which I use in Appear), like the "old" FirstTime .

 

[Erel]

The issue with B4XFloatTextField is fixed in XUI Views v2.55: https://www.b4x.com/android/forum/t...ss-platform-views-and-dialogs.100836/#content

Note that in this case it is safer to still check that the two fields are initialized.