Android Question get B4XPage from a XUI CustomView

Alessandro71 · Dec 26, 2020

How can I can get the B4XPage object which a CustomView belongs to, from inside a CustomView sub.
Maybe from mBase itself?

LucaMs · Dec 26, 2020

Alessandro71 said:
Maybe from mBase itself?

I think you can get only the Root of the page, using
Dim ParentRoot As B4xView = mBase.Parent

Erel · Dec 27, 2020

You can use this code to get B4XPageInfo from a view. You do need to pass mBase for custom views, as this is the real view.

B4X:

Public Sub GetPageInfoFromView(view As B4XView) As B4XPageInfo
    Dim pi As B4XPageInfo = Null
    Do While view.IsInitialized And pi = Null
        pi = B4XPages.GetManager.GetPageInfoFromRoot(view)
        view = view.Parent
    Loop
    Return pi
End Sub

LucaMs · Dec 27, 2020

Erel said:
You can use this code to get B4XPageInfo from a view. You do need to pass mBase for custom views, as this is the real view.

But then what can you do with it?

You can only get a generic object, without having access to its properties and methods.

Erel · Dec 27, 2020

You should cast it to the correct type:

B4X:

Dim pg As MyPage187 = pi.B4XPage

LucaMs · Dec 27, 2020

Erel said:
You should cast it to the correct type:

B4X:

Dim pg As MyPage187 = pi.B4XPage

Yes but @Alessandro71 doesn't know what it is

Erel · Dec 27, 2020

The OP wanted to get the B4XPage object. This is the answer.

Maybe he wants to raise an event?

B4X:

CallSubDelayed(pi.B4XPage, "NonStandardEventAsWeDontKnowTheEventName")

Alessandro71 · Dec 27, 2020

this was actually for the Initialize of the Camera object for B4i in a cross-platform project

B4X:

    Dim p As B4XPageInfo = B4XUtils.GetPageInfoFromView(mBase)
    Private Camera As Camera
    Camera.Initialize("Camera", B4XPages.GetNativeParent(p.B4XPage))

Alessandro71 · Dec 27, 2020

Erel said:

B4X:

Public Sub GetPageInfoFromView(view As B4XView) As B4XPageInfo
    Do While True
        Dim pi As B4XPageInfo = B4XPages.GetManager.GetPageInfoFromRoot(view)
        If pi <> Null Then
            Return pi
        Else
            view = view.Parent
        End If
    Loop
    Return Null
End Sub

the above code, which I put in a code module, while no errors are displayed in the IDE, produces the following message in the compilation phase:

Compiling generated Java code. Error
B4A line: 123
view = view.Parent
src\com\project\check\pro\test\b4xutils.java:69: error: unreachable statement
;
^

Erel · Dec 27, 2020

I've updated the code. It should fix it.

LucaMs · Dec 27, 2020

Erel said:
The OP wanted to

O.T. I know by "OP" you mean who opened the thread but what does OP stand for? (Just out of curiosity since I prefer to mention the nickname directly, it's much friendlier)

EDIT:
OP = Original Poster
https://it.wikipedia.org/wiki/Espressioni_del_gergo_di_Internet

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