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lib/Tk/ForDummies/Graph/FAQ.pod  view on Meta::CPAN

B<NB:> The graph have a minimum size (by default 400x400). Then if you want to reduce this size, configure 
-width and -height option at the creation of the graph.

=head2 How to save graph in postscript, jpeg, png, gif format file ?

You can use the postscript method canvas (see L<Tk::Canvas>) to create postscript file of your image.

  $GraphDummies->postscript( -file => "MyFile.ps");

If you want to convert it in gif, jpeg format file for example, you can install L<Image::Magick> module 
and Ghostscript (L<http://pages.cs.wisc.edu/~ghost/>).

Example code for postscript file conversion:
  
  use Image::Magick;
  my $Magick = new Image::Magick;
  $Magick->Read("MyFile.ps");
  $Magick->Write("MyFile.png");

=head2 How to zoom the graph in canvas widget ?

To zoom your graph, use zoom, zoomx or zoomy methods. You can create a menu zoom on the canvas.
You have an example code in L<Tk::ForDummies::Graph::Lines/EXAMPLES> 

=head2 Warning or fatal error messages