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     	executing at 5:15:31 PM
LCB Error	Variables must be defined before being used - variable mIsDay in community.livecode.livecode.clock.
Object	widget id 1003
LCB File	clock.lcb
LCB Line	231

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     	executing at 5:15:31 PM
LCB Error	Variables must be defined before being used - variable mIsDay in community.livecode.livecode.clock.
Object	widget id 1003
LCB File	clock.lcb
LCB Line	231

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variable mMyImage as optional Image

handler OnPaint()
  if mMyImage is defined then
    ... paint the image ...
  else
    ... do other behavior ...
  end if
end handler

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variable mMyImage as Image

handler OnCreate()
  put image from resource file "default.png" into mMyImage
end handler

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variable mProcessedImage is optional Image

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setImageFile(the empty string)

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widget community.livecode.nmallan.imageProcess

use com.livecode.canvas
use com.livecode.widget

metadata title is "Image Process"
metadata author is "Neil Allan"
metadata version is "1.0.0"

property fileName get mImageFile set setImageFile
property processParameters get getProcessParameters set setProcessParameters

private variable mImageFile as String -- image file name
private variable mProcessParameters as List -- process parameters
private variable mOriginalImage as Image -- used to process data
private variable mProcessedImage as Image -- this will be drawn to canvas
private variable mImageData as Data -- the raw bytes ARGB or RGBA to process

--variable mProcessedImage is optional Image -- ***attempt to stop error***

public handler OnLoad()

  --variable mProcessedImage is optional Image -- ***attempt to stop error***
  
  --setImageFile(the empty string) -- ***attempt to stop error****
  
end handler

public handler OnCreate()

  -- variable mProcessedImage is optional Image -- *** attempt to stop error ***
  
  -- setImageFile(the empty string) -- ***attempt to stop error***
  
end handler

public handler OnPaint()

  -- variable mProcessedImage is optional Image -- ***attempt to stop error***
  
  if mProcessedImage is defined then
    draw mProcessedImage into rectangle [0,0,my width,my height] of this canvas
   end if
   
end handler

private handler setImageFile(in pImageFile as String) as undefined
  -- set image file and reset process parameters
  get setProcessParameters("0,0,0,0,0,0,0,0,0")
  put pImageFile into mImageFile
  put image from file mImageFile into mOriginalImage
  put mOriginalImage into mProcessedImage
  put the pixels of mOriginalImage into mImageData -- ARGB/RGBA data to process
  redraw all
end handler

private handler setProcessParameters(in pParameters as String) as undefined
  split pParameters by ","
  put the result into mProcessParameters
  -- the mojo will go here
end handler

private handler getProcessParameters() as String
  combine mProcessParameters with ","
  return the result
end handler

end widget

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library community.livecode.nmallan.maths

public handler Tested() as Integer
  variable tIntA as optional Integer -- my simple test of "optional" properties
  variable tIntB as Integer
  variable tIntC as Integer
  put 1 into tIntA -- if tIntA is  not defined then operator will return empty
  put 1 into tIntB
  put tIntA + tIntB into tIntC
  return tIntC
end handler

end library