If you set this variable
to false, or don??™t set it at all, the PDF will be downloaded instead.
After that, the code loops through the graph temporary files and deletes them. (You
cannot use Ruby??™s built-in Tempfile class here because you cannot specify a file extension,
and both Gruff and rpdf use the file extension to determine the file format.)
The .rpdf view (Listing 10-7) is in app/views/report/combined.pdf.rpdf. As you can
see, the code is reasonably straightforward:
pdf.select_font "Times-Roman"
figure_number = 1
@graph_files.each do |title, graph|
pdf.image graph
pdf.text "
Figure #{figure_number
} of #{@graph_files.length
}- #{title}", :left=>6, :font_size=>12
figure_number = figure_number + 1
end
This code loops through the graphs passed by the controller and uses the image
method from the PDF::Writer library to insert the image. Next, it labels each one with a
figure number and a title.
Next, let??™s examine the three protected functions in the report controller, app/
controllers/report_controller.
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