Mastering Perl/Tk

Really Miscellaneous Methods

findINC returns the absolute pathname of a file:

$file = Tk->findINC("Xcamel.gif");

Tk->findINC searches for files in all Tk subdirectories of the current @INC path. This can also be a personal Tk directory, if it was added with use lib or push @INC,... earlier. If using the form Tk::findINC, then only @INC is searched, not the subdirectories.

FullScreen simply makes a Toplevel window as large as the display. On Win32, this does not include the taskbar area.

$mw->FullScreen;

Getimage looks for an image with the specified basename and returns the object reference. The subroutine appends extensions to the basename in the following order: xpm, gif, ppm, xbm until a valid image is found. If that fails, built-in images are searched.

$image = $widget->Getimage(name);

tainting returns a true value if the program is running with taint checks enabled.

$tainted = $widget->Tk::tainting;

scaling sets and queries the current scaling factor used by Tk to convert between physical units (for example, points, inches, or millimeters) and pixels. The number argument is a floating-point number that specifies the number of pixels per point on $widget’s display. If the number argument is omitted, the current value of the scaling factor is returned.

A point is a unit of measurement equal to 1/72 inch. A scaling factor of 1.0 corresponds to 1 pixel per point, which is equivalent to a standard 72 dpi monitor. A scaling factor of 1.25 would mean 1.25 pixels per point, ...