How can you check if an object has focus?

During a touch event I can call display.getCurrentStage():setFocus(object) so that following touch events all apply to the object. During a touch event how can I check if focus is set to any object?

What I want to do is 'release' the object when the users finger moves out of the object bounds, which I do using display.getCurrentStage():setFocus(nill). However while the event is still in the "moved" phase I need to set focus to the next object once the previous object has been 'released'.

The following unfinished code might help explain.

function card:touch(event)
  if event.phase == "began" then
    display.getCurrentStage():setFocus( card )
    -- display selection
  elseif event.phase == "moved" then
    if focusIsSet???? then
      if card.isOutOfBounds(event) then
        display.getCurrentStage():setFocus(nil)
        -- clear selection
        return false
      end
    else
      display.getCurrentStage():setFocus( card )
      -- display selection
  elseif event.phase == "ended" then
    display.getCurrentStage():setFocus(nil)
    -- clear selection
  end
  
  return true
end

function card:touch(event)
  if event.phase == "began" then
    display.getCurrentStage():setFocus( card )
 
 
event.target.isFocus = true
 
 
    -- display selection
  elseif event.phase == "moved" then
 
 
    if event.target.isFocus then
 
 
      if card.isOutOfBounds(event) then
        display.getCurrentStage():setFocus(nil)
        -- clear selection
        return false
      end
    else
      display.getCurrentStage():setFocus( card )
      -- display selection
  elseif event.phase == "ended" then
    display.getCurrentStage():setFocus(nil)
 
 
event.target.isFocus = false
 
 
    -- clear selection
  end
  
  return true
end

Great, thanks.

I can see I'm going to have to break free of the static language mindset.

views:1649 update：2011/11/25 8:45:21


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