B4J Question [Solved] [B4J] SetFormStyle error

[Aldo's]

I wrote this code:

Private Sub B4XPage_Appear
    B4XPages.setTitle(Me,"Pippo")
    B4XPages.GetNativeParent(Me).WindowHeight=400
    B4XPages.GetNativeParent(Me).WindowWidth=400
    B4XPages.GetNativeParent(Me).Resizable=False
    B4XPages.GetNativeParent(Me).SetFormStyle("UTILITY")
    Dim MyColors(3) As Int = Array As Int(xui.Color_Yellow, xui.Color_ARGB(255,169,255,169), xui.Color_ARGB(255,169,255,250))
    SQL1.InitializeSQLite(Main.DbDir,Main.DbFile,False)
    RS1=SQL1.ExecQuery("SELECT * FROM Pippo WHERE ID = " & Main.iID & "")
    Do While RS1.NextRow
        Dim iCol As Int=RS1.GetInt("colore")-1
        Root.Color=MyColors(iCol)
        lblTitolo.As(Label).Text=RS1.GetString("titolo")
        lblTesto.As(Label).Text=RS1.GetString("testo")
    Loop
End Sub

When I launch the app it gives me this error:
Error occurred on line: 306 (B4XPagesManager)
java.lang.IllegalStateException: Cannot set style once stage has been set visible
at javafx.graphics/javafx.stage.Stage.initStyle(Stage.java:484)
at anywheresoftware.b4j.objects.Form.SetFormStyle(Form.java:278)
at b4j.example.postit._b4xpage_appear(postit.java:79)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at anywheresoftware.b4a.shell.Shell.runMethod(Shell.java:629)
at anywheresoftware.b4a.shell.Shell.raiseEventImpl(Shell.java:234)
at anywheresoftware.b4a.shell.Shell.raiseEvent(Shell.java:167)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at anywheresoftware.b4a.BA.raiseEvent2(BA.java:109)
at anywheresoftware.b4a.shell.ShellBA.raiseEvent2(ShellBA.java:98)
at anywheresoftware.b4a.keywords.Common.CallSub4(Common.java:509)
at anywheresoftware.b4a.keywords.Common.access$0(Common.java:489)
at anywheresoftware.b4a.keywords.Common$CallSubDelayedHelper.run(Common.java:563)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(Native Method)

What am I doing wrong?

 

[LucaMs]

java.lang.IllegalStateException: Cannot set style once stage has been set visible

Apparently it is not possible to set the style at runtime, or rather when the Form has already been displayed.

Move it to Main (form) - AppStart:

MainForm.SetFormStyle("UTILITY")

 

[Aldo's]

Can I try to insert SetFormStyle in B4XPage_Create?

 

[DonManfred]

Can I try to insert SetFormStyle in B4XPage_Create?

Based on the Error

Cannot set style once stage has been set visible

it can not been set after it was visible once. Guess you have to set it when the page are created. And only ONCE.

 

[LucaMs]

Can I try to insert SetFormStyle in B4XPage_Create?

No, it would be the same.

 

[Aldo's]

it can not been set after it was visible once. Guess you have to set it when the page are created. And only ONCE.

Yes, the B4XPage_Created is invoked before display. Can I put the SetFormStyle there?

 

[LucaMs]

Yes, the B4XPage_Created is invoked before display. Can I put the SetFormStyle there?

1:

No, it would be the same.

2: just try!

 

[DonManfred]

Can I put the SetFormStyle there?

What about just to try it?

 

[LucaMs]

What about just to try it?

@DonManfred, can you read my answers or were you just typing while mine arrived?

 

[DonManfred]

Don Manfred, can you read my answers or were you just typing while mine arrived?

You are still on my ignorelist
I don´t see a reason to change that though.

I must click on show ignored content to see it; like i did here once ;-)

 

[Aldo's]

Yes, the B4XPage_Created is invoked before display. Can I put the SetFormStyle there?

In B4XPage_Create it works.
Thank's

 

[LucaMs]

I don´t see a reason to change that though.

I, on the other hand, don't know why I'm there but it doesn't matter.

 

[LucaMs]

In B4XPage_Create it works.
Thank's

Not in my (first) test...

 

[Aldo's]

Not in my (first) test...

I retry now

 

[LucaMs]

Not in my (first) test...

Second one...

 

[Aldo's]

I retry and it works.

 

[LucaMs]

I retry and it works.

Perché a te sì e a me no? Sei raccomandato?

1. Is it the B4XMainPage?
2. Release or debug mode?

EDIT: (1) No, I think it is another one, "Pippo", correct?

 

[Aldo's]

1. Is it the B4XMainPage?

No, pagina successiva

1. Release or debug mode?

Debug

Perché a te sì e a me no? Sei raccomandato?

Probabilmente si

 

[LucaMs]

Yes, I had just tried; it works except in the B4XMainPage.