Is there any way to set by default key focus inside init() or inside XML component

Question

My Button is below. I tried to focusBitmapUri set in XML and also set in init(). I need to button the focus image when the application launch. So, I set this field in init(). I tried focusable = "true". But no luck.

My XML File :

<Button id="Button" iconUri="" focusedIconUri="" showFocusFootprint="true" 
focusFootprintBitmapUri="pkg:/images/button.png" minWidth="150" focusable="true" 
height="50" translation="[440,500]" />

My brs File :

sub init()
     m.Button = m.top.findNode("Button") 
     ?m.Button.hasFocus()
     m.Button.focusBitmapUri = "pkg:/images/newsignin.png"
     m.Button.iconUri = ""
     m.Button.focusedTextColor = "0x00000000"
     m.Button.setFocus(true)
     ?m.Button.hasFocus()
     ?"m.Button.focusFootprintBitmapUri : "m.Button.focusFootprintBitmapUri
     ?"m.Button.focusBitmapUri : " m.Mac_Login.focusBitmapUri
     m.top.SetFocus(true)
end sub

It's Completely Working fine. After, I set this field in onkeyEvent. In Documentation said this field worked after key focus. But, Is there any way to set by default key focus to this button when the application launches and init().

function onKeyEvent(key as String, press as Boolean) as Boolean
     result = false
     if key = "OK" then
          m.Button.focusBitmapUri = "pkg:/images/Button.png"
          m.Button.iconUri = ""
          m.Button.focusedTextColor = "0x00000000"
          m.Button.setFocus(true)
          ?m.Button.hasFocus()
          ?"m.Button.focusFootprintBitmapUri : "m.Button.focusFootprintBitmapUri
          ?"m.Button.focusBitmapUri : " m.Button.focusBitmapUri
         result = true
     end if
     return result 
end function

Answer 1

Setting the focus on "OK" button press is really unusual practice. This button is used to handle the button selection event. If I am understanding it correctly, you want to set the default focus on this button. There are various ways to achieve the same. One way is to set the "initialFocus" attribute of "component" element in xml file e.g.

<Component id = "yourComponentName" extends = "Group" initialFocus = "Button">
.....
.....
</Component>