Android Question B4XPages background panel

agraham

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• Jun 23, 2020

• #2

Root

 

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sorex

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• Jun 23, 2020

• #3

that's the first thing I tried, a-man.

but it doesn't work.

as long as I don't use addpage & showpage it's visible by adding it to root1 in _Created.

it's plain black when a page is added and shown.

adding it straight to the activity shows that the page is transparent tho.

I am thinking that it's added to the default page and not the actual root panel.


Edit: the above is true. the background shows when displaying the main page but that gets hidden when showing another one.

 

Last edited: Jun 23, 2020

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agraham

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• Jun 23, 2020

• #4

I checked that I could put both a background colour and an image on Root before I posted.

B4X:

Private Sub B4XPage_Created (Root1 As B4XView)   
    Root = Root1
    'load the layout to Root - we don't here as we have a Drawer
    Root.LoadLayout("Login")
    Root.Color = Colors.Red

I also checked it works if you use a Drawer and load the layout into its centre panel

 

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sorex

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• Jun 23, 2020

• #5

ok, but did you create and display another page?

I want it to be in the root.parent thus the B4XPage main container.

I don't know how it will be memory wise if I need to add it to all my pages as workaround (or the straight activity method)

 

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agraham

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• Jun 23, 2020

• #6

sorex said:

ok, but did you create and display another page?

Click to expand...

Yes, two more. I'm using an enhanced version of Erels ThreePagesExample and it works exactly as expected.

sorex said:

I want it to be in the root.parent thus the B4XPage main container.

Click to expand...

That's where I put it, in the Root of B4XMainPage where it affects only that page - or did you mean something different?

sorex said:

I don't know how it will be memory wise if I need to add it to all my page

Click to expand...

For a colour - nothing. For an image you could try loading it once and reusing the Bitmap on other pages. I'll try that tomorrow as I'm now off for a shower and then dinner.

 

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sorex

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• Jun 23, 2020

• #7

what I want is a straight forward method in B4XPages to have a background (color, image, gradient or something else that can be constructed via designer/code)
that's visible on all pages.

just an extra panel that's at the outer "back" will do unless there is another way that gives us access to the real root panel and not just the current page root.

 

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agraham

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• Jun 23, 2020

• #8

In Main

B4X:

Sub Activity_Create(FirstTime As Boolean)
    ...   
    Dim bmpd As BitmapDrawable
    bmpd.Initialize( xui.LoadBitmapResize(File.DirAssets, "colors-icon.png", 500dip, 500dip, True))   
    Activity.Background = bmpd
End Sub

 

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sorex

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• Jun 23, 2020

• #9

indeed, that's a way to get it working as mentioned above and I'll use that as a temp. workaround.

but this is a feature that should be part of the B4XPages imho then there's no need to put that code in the main module and (called from) outside the shared classes.

something like b4xpages.rootpanel or .backgroundpanel

 

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Erel

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• Jun 24, 2020

• #10

No such thing. You should set the background in each of the pages (trivial to do). A page in B4J is a separate form and in B4i it is a separate 'Page'.

 

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sorex

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• Jun 24, 2020

• #11

I know that but it's like letting your house painted room by room by 10 different companies instead of doing your entire house at once by 1.

Please consider it as a feature request/improvement as it will make things a lot easier for everyone as it can be set in the default page init sub
instead of doing it in the main module with a shared sub call where we then have to take care of the activity/page differences aswell.

 

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agraham

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• Jun 24, 2020

• #12

I think Erel's implication is that as it is not possible in B4J and B4i then such a feature would not be cross-platform and so doesn't really belong in B4XPages.

 

Last edited: Jun 24, 2020

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Erel

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• Jun 24, 2020

• #13

Exactly and it is also trivial to create a public sub in B4XMainPage that sets the background exactly as you want. Just call it from B4XPage_Create.

B4X:

B4XPages.MainPage.SetBackground(Root)

 

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