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tools: print the formula to calculate resolutions

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And encourage users to move at least 25cm, makes it a lot easier to pick the
resolution.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Hutterer 2014-12-12 07:47:20 +10:00
parent 7e8a2eaa30
commit e897f6f821
1 changed files with 4 additions and 1 deletions
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5
tools/mouse-dpi-tool.c
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@ -181,6 +181,9 @@ print_summary(struct measurements *m)
printf("%8dmm %8.2fin %8ddpi\n",
(int)(inch * 25.4), inch, res);
}
printf("If your resolution is not in the list, calculate it with:\n"
"\tresolution=%d/inches, or\n"
"\tresolution=%d/(mm * 25.4)\n", m->distance, m->distance);
}
static inline const char*
@ -236,7 +239,7 @@ main (int argc, char **argv) {
libevdev_grab(dev, LIBEVDEV_UNGRAB);
printf("Mouse %s on %s\n", libevdev_get_name(dev), path);
printf("Move the device along the x-axis.\n");
printf("Move the device 250mm/10in or more along the x-axis.\n");
printf("Pause 3 seconds before movement to reset, Ctrl+C to exit.\n");
setbuf(stdout, NULL);