When is it valid/invalid to change the theme?(force repaint)

Question

I'm noticing that sometimes when I try to change the theme, the changes don't seem to occur.

Sub initTheme()

    app = CreateObject("roAppManager")
    theme = CreateObject("roAssociativeArray")
    
    'Create a noticeably different theme each time this function is called. 
    theme.OverhangOffsetHD_X = itostr( RND(1000) )
    
    theme.OverhangOffsetHD_Y = "25"
    theme.OverhangSliceHD = "pkg:/images/Overhang_Background_HD.png"
    theme.OverhangLogoHD  = "pkg:/images/Overhang_Logo_HD.png"
    app.SetTheme(theme)
    
    print "Theme changed."

    theme = invalid
    app = invalid
    
End Sub

For example, If I call the above function in response to roPosterScreen::isListItemFocused, nothing changes. If I call initTheme after creating and showing another roPosterScreen, the changes DO occur.

Are there valid/invalid times to change the theme?

RokuKevin · Answer

Try calling the screen's .Show() method again after changing the theme to make it take effect.--Kevin

evilmax17 · Answer

"RokuKevin" wrote:Try calling the screen's .Show() method again after changing the theme to make it take effect.--KevinNada.  No difference.

TheEndless · Answer

"RokuKevin" wrote:Try calling the screen's .Show() method again after changing the theme to make it take effect.--KevinIn my experience, calling .Show() again doesn't actually invalidate the screen for some reason, so it doesn't cause a redraw, but it's been awhile since I tried it last, so that may have changed.jbrave apparently accomplishes it in his Soundcloud app by showing and immediately hiding an roOneLineDialog (fast enough that it never actually draws, but causes the poster screen to redraw).  That's more of a hack than a solution, really, but it could work in your situation if calling .Show() doesn't work.

renojim · Answer

I remember going through this quite a while back. I have a comment in my code that says, "this is here to make sure the theme change takes effect". Unfortunately the next two lines are commented out, but I think that's because they were rolled into the function above the comment. The two lines were:

screen.SetFocusedListItem(i) ' where i was the current focused list item
screen.Show()

I'd be interested to see if it works for you.

Edit: In looking over different versions of the code, those two lines seem to come and go, so they may or may not help.

-JT

evilmax17 · Answer

"TheEndless" wrote:jbrave apparently accomplishes it in his Soundcloud app by showing and immediately hiding an roOneLineDialog (fast enough that it never actually draws, but causes the poster screen to redraw).  That's more of a hack than a solution, really, but it could work in your situation if calling .Show() doesn't work.This ended up doing the trick.  I'd still like to see a "force repaint" parameter for screen.Show() if repainting isn't guaranteed, but this will do for now.Sub repaintScreen()	dialog = CreateObject("roOneLineDialog")	dialog.Show()	dialog.Close()	dialog = invalidEnd SubThanks all!

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When is it valid/invalid to change the theme?(force repaint)

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