Android Question [B4X] Check view IsNot B4XView or any other type

[Alexander Stolte]

So I can check whether something is a certain type:

If View Is B4XView Then

but i have often had situations where i have to check whether it is not a certain type, e.g:

If xtf_TextBox.IsInitialized = False Or xtf_TextBox.Parent Is Not B4XView Or xtf_TextBox.Parent.IsInitialized = False Then Return

I can also write a function that looks like this, but that is not a nice solution at all:

Private Sub IsObjectB4XView(View As Object) As Boolean
    Return View Is B4XView
End Sub

Does the ide have a syntax to achieve this goal?

 

[William Lancee]

Unless I don't understand your question you can use the Not() method
NOTE that testP is both a Label and a B4XView! Something I just learned.
And lbl is both too!

    Dim lbl As Label
    lbl.Initialize("")
    Dim testP As B4XView = lbl

    Log(testP Is B4XView)    'true
    Log(testP Is Label)        'true

    Log(Not(testP Is B4XView))    'false
    Log(Not(testP Is Label))    'false
    
    Log(lbl Is B4XView)        'true
    Log(lbl Is Label)        'true
    
    Log(GetType(testP))        'javafx.scene.control.Label
    Log(GetType(lbl))        'javafx.scene.control.Label

 

[Alexander Stolte]

you can use the Not() method

I really didn't know that, thank you very much! I'm used to using Is Not from vb.net, it's nice and short.