change to UpdateProgress ???

[John Biddiscombe]

Dear all,

I'd like to modify UpdateProgress within vtkProcessObject to support the
passing of a text message...
In many cases I'd like to be able to call

UpdateProgress(0.00,"Building BSP Tree");
loop
  UpdateProgress(.....); // change value
endloop

UpdateProgress(0.50,"Generating shadowed regions");
loop
  UpdateProgress(.....); // change value
endloop

UpdateProgress(0.75,"Computing coverage map");
loop
  UpdateProgress(.....); // change value
endloop

this could also be achieved by the addition of a new
SetProgressMessage("Doing stuff") 
call, which could be used within the Execute() method of a filter to
improve user feedback. 

Comments ???

John B

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