B4J Question Order of events

cstangor · Jul 19, 2014

Why does "Done" print before "Change" in my log??

Thanks in advance

B4X:

Sub AppStart (Form1 As Form, Args() As String)
    MainForm = Form1
    MainForm.RootPane.LoadLayout("Layout1") 'Load the layout file.
    MainForm.Show
   
    Dim tf As TextField: tf.Initialize("tf")
    tf.Text = "Text1"
    Log ("Done")

End Sub
Sub TF_TextChanged (Old As String, New As String)
    Log ("Change")
End Sub

thedesolatesoul · Jul 19, 2014

Ha...time travel!

The TextChanged event is probably raised in the message queue, will only execute when the current thread is complete.

Janos Kerekes · Dec 8, 2014

Hi!

Can you please help me about this?
I faced into the same problem and don't know how to solve it.
In my situation I would like to disable a button after sql query finish and enable when any textbox change.

Is there any way I can avoid this?

Thanks a lot

Erel · Dec 8, 2014

Not sure that I understand. Can you post the relevant code?

Janos Kerekes · Dec 9, 2014

Sure.

I prepared a test in eclipse as well and it works fine.

I'm trying to describe that I would like to do.
When btnStart clicked I would like to refresh textboxes from database and after it disable the btnSave.
And when any textbox change then I'd like to enable btnSave.

My problem with the order of the events.
Textbox change event raised after btnStart_Action finished.

That's why btnSave never has disable state.

Thanks a lot.

Erel · Dec 9, 2014

I cannot open the zip file.
You can probably solve this issue with a CallSubDelayed call that will disable the text field.

Janos Kerekes · Dec 9, 2014

sorry, upload them again.

Could you please help how should I use CallSubDelayed?

Erel · Dec 9, 2014

Change your code to:

B4X:

   ' Disable save button while there is no change(s)
   
   CallSubDelayed(Me, "DisableButton")
End Sub

Sub DisableButton
   btnSave.Enabled = False
   Log("end")
End Sub

B4J Question Order of events

cstangor

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