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waiting for button input

 
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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Thu Apr 12, 2007 8:43 pm    Post subject: waiting for button input Reply with quote
Ever since I know lua I have been using this code to wait till a button is pressed, only to find out that it doesn't work!

Code:

pad = nil
while pad == nil do
  System.sleep(100)
  pad = Controls.read()
end


If I add a print("hello") to my code after end my screen is filled with 10 hello's per second(I guess) although I don't press any buttons. This is pretty embarassing, so can anyone tell me how to do this?
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matriculated



Joined: 04 Mar 2006
Posts: 31
PostPosted: Fri Apr 13, 2007 2:23 am    Post subject: Reply with quote
pad will never = nil if you do a controls.read

do something like this:

Code:
repeat
  System.sleep(100)
  pad = Controls.read()
until pad:buttons()


This loops until a button (or dpad) is pressed
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the underminer



Joined: 03 Oct 2005
Posts: 124
Location: Netherlands
PostPosted: Sat Apr 14, 2007 6:22 pm    Post subject: Reply with quote
that doesn't work either
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matriculated



Joined: 04 Mar 2006
Posts: 31
PostPosted: Sun Apr 15, 2007 6:26 am    Post subject: Reply with quote
It does work because I use a slightly modified code in all my programs to pause for input.

Code:
function pause()
  local pad
  repeat
    pad = Controls.read()
    screen.waitVblankStart(5)
  until pad:start()
end
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romero126



Joined: 24 Dec 2005
Posts: 200
PostPosted: Mon Apr 16, 2007 3:07 am    Post subject: Reply with quote
Code:
-- Coded by romero126
GlassEyeInput = {
   ["KeyList"] = { }
}

table.insert(GlassEyeInput["KeyList"], {Controls.selectMask, "Select", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.startMask, "Start", nil})

table.insert(GlassEyeInput["KeyList"], {Controls.upMask, "Up", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.rightMask, "Right", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.downMask, "Down", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.leftMask, "Left", nil})

table.insert(GlassEyeInput["KeyList"], {Controls.ltriggerMask, "LTrigger", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.rtriggerMask, "RTrigger", nil})

table.insert(GlassEyeInput["KeyList"], {Controls.triangleMask, "Triangle", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.circleMask, "Circle", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.crossMask, "Cross", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.squareMask, "Square", nil})

table.insert(GlassEyeInput["KeyList"], {Controls.homeMask, "Home", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.holdMask, "Hold", nil})
table.insert(GlassEyeInput["KeyList"], {Controls.noteMask, "Note", nil})

function GlassEyeInput:CheckInput(key)
   result = nil
   for k, v in GlassEyeInput["KeyList"] do
      if (key:buttons() & v[1] > 0) then
         if (not v[3]) then
            v[3] = 1
            if (not result) then result = { } end
            result[v[2]] = 1
         end
      else
         if (v[3]) then
            if (not result) then result = { } end
            result[v[2]] = 0
            v[3] = nil
         end
      end
   end
   return result
end


Code:
-- Coded by romero126
if (GlassEyeInput) then
   local check = GlassEyeInput:CheckInput(key)
   if (check) then
      for k,v in check do
         if (k == "Start") and (v == 0) then
            print("You lifted your finger on the start key")
         end
         if (k == "Start") and (v == 1) then
            print("You pressed your finger on the start key")
         end
      end
   end
end


Enjoy!
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romero126



Joined: 24 Dec 2005
Posts: 200
PostPosted: Mon Apr 16, 2007 9:35 am    Post subject: Reply with quote
cheap input is also done by
key = Controls.read()
while true do

if (key != Controls.read())
key = Controls.read()
-- do stuff here
end

end
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