' ********** Copyright 2016 Roku Corp.  All Rights Reserved. **********
'setting top interfaces
'setting observers

Sub Init()
	m.background=m.top.findNode("background")
	m.oldBackground=m.top.findNode("oldBackground")
	m.oldbackgroundInterpolator=m.top.findNode("oldbackgroundInterpolator")
	m.shade=m.top.findNode("shade")
	m.fadeoutAnimation=m.top.findNode("fadeoutAnimation")
	m.fadeinAnimation=m.top.findNode("fadeinAnimation")
	m.backgroundColor=m.top.findNode("backgroundColor")
	
	m.background.observeField("bitmapWidth","OnBackgroundLoaded")
	m.top.observeField("width","OnSizeChange")
	m.top.observeField("height","OnSizeChange")
End Sub

'If background changes, start animation and populate fields
Sub OnBackgroundUriChange()
	oldUrl=m.background.uri
	m.background.uri=m.top.uri
	If oldUrl<>""
		m.oldBackground.uri=oldUrl
		m.oldbackgroundInterpolator=[m.background.opacity,0]
		m.fadeoutAnimation.control="start"
	End If
End Sub

'If Size changed, change parameters to childrens
Sub OnSizeChange()
	m.background.width=m.top.width
	m.oldBackground.width=m.top.width
	m.shade.width=m.top.width
	m.backgroundColor.width=m.top.width
	
	m.oldBackground.height=m.top.height
	m.background.height=m.top.height
	m.shade.height=m.top.height
	m.backgroundColor.height=m.top.height
End Sub

' When Background image loaded, start animation
Sub OnBackgroundLoaded()
	m.fadeinAnimation.control="start"
End Sub