[Mac Cody]'s nearly [pure-Tcl] [PDF]-savvy [extension], 
whose home is on [SourceForge] at http://trampoline.sourceforge.net

Trampoline is an extension to enable Adobe [PDF] output from the [canvas].  From SourceForge:-

''Trampoline! is a nearly pure-Tcl library extension that generates an Adobe Portable Document Format (PDF) document based upon the content of a Tk canvas. The intent of this extension is to provide a "modern" replacement for the Tk canvas widget command [postscript], which generates a Postscript document based upon the content of a Tk canvas. Trampoline! is striving to be compliant with Adobe PDF Reference version 1.4.''

[DPE] ''10 May 2005'' Thanks for a useful package.
I found a bug with text that contains nothing but whitespace that causes '''generate''' to fail.
This can be fixed by adding the following lines near the top of TextConvert:

      # Do not process blank text
      if {[string trim [$w itemcget $item -text]] == ""} {
          return ""
      }
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[RS]: [Trampoline] is also a coding concept to allow unbounded [recursion]. 
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[MP] ''13 August 2005'' Great package !
I also found a bug, only the visible part of the canvas is placed in the pdf. this can be overcomeby replacing 
      AppendPageObject [winfo width $w] [winfo height $w]
by
      set Size [$w cget -scrollregion]
      AppendPageObject [lindex $Size 2] [lindex $Size 3]
I have not tested it when ''scrollregion'' is not set in the canvas definition
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[Category Package]