All absolute measurements, such as the numbers used in this section’s size-related properties, are specified in device-independent pixels. These “logical pixels” are meant to represent 1/96th of an inch, regardless of the screen’s DPI setting. Note that device-independent pixels are always specified as double values, so they can be fractional.
The exact measurement of 1/96th of an inch isn’t important, although it was chosen because on a typical 96 DPI display, one device-independent pixel is identical to one physical pixel. Of course, the notion of a true “inch” depends on the physical display device. If an application draws a one-inch line on my laptop screen, that line will certainly be longer than one inch if I hook up my laptop to a projector!
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