Report with circles and other draw elements

Hello, friends. I use Delphi 7 and Windows. To generate reports, I've
been using some report tools, like Rave or Report Builder. But, for the
first time, I need to generate a report with many lines, rectangles,
circles, and other draw elements, depending on some DataBase values.
I've read about TPrinter and TCanvas at Delphi's help (which seems to
me I'll have to use on this case), I've understood all drawing methods,
but it's not yet clear how to use it. When user clicks a button, the
program will show this kind of report at screen and optionally send it
to a printer. Could someone give me a good track to do it?