If you prefer to use inches for
screen distance but you want to print out pixels, you can use the
pixels method to convert any valid screen distance
string into a pixel value; for example:
$pixels = $widget->pixels("2i"); # What is 2 inches in pixels?
$pixels = $widget->pixels("2m"); # What is 2 millimeters in pixels?
The pixels method rounds to the nearest whole pixel. You can get a
fractional pixel result by using fpixels:
$pixels = $widget->fpixels("2i"); # What is 2 inches in pixels?
$pixels = $widget->fpixels("2m"); # What is 2 millimeters in pixels?
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