🚀 go-pugleaf

Earl F. Glynn <EarlGlynn@WorldNet.att.net> wrote:

> Take a look at the Printer Demo #1 program on the Printer
> Projects page in my Computer Lab.  (Look for "Other
> Projects" on the main page).  This examples shows how
> to print text and graphics (both image and vectors)
> on a printer canvas.  Other examples in my Computer
> Lab show how to draw on a canvas that can be
> either the display or the printer.
>      efg's Computer Lab:  http://infomaster.net/external/efg


Earl, your examples are ***terrific***!  Thanks!  With the samples, it was
straightforward to figure out how to use some of the exotic calls
necessary to do printing.

I was well aware that the screen and different printers all have different
pixels per inch.  What surprised me is that neither Delphi nor Windows
insulates the programmer from such low-level concerns.  (My background is
15 years of programming on the Mac, which takes WYSIWYG seriously.  On the
Mac, when I draw a circle one-inch in diameter, it's one inch on the
screen and one inch on virtually every printer.  So, one routine, without
a lot of special casing, can be used to draw on any device, including the
screen.  On Delphi/Windows, if the form.PixelsPerInch is 96 and I use that
to draw a line of 1", it might actually be 1.5" on screen, 1/2 inch on one
printer and 1/4 inch on another printer.)

Now that I have learned that I have to do the scaling myself, your
examples, Earl, taught me *exactly* what I needed to know.  I have
modified my code and now have good-looking printed reports.

Thank you!!!!

Kevin Killion