On Aug 21, 2006, at 9:18 PM, Dave Mihalik wrote:
Does anyone know if it is even possible to change the window icon
Ruby and Tk?
I’m replying only because nobody else seems willing to and not
because I have the answer you’re seeking. The short answer seems to
be: no, but it might be platform dependent. The semi-official RubyTk
documentation http://www.jbrowse.com/text/rubytk_en.html that I
consulted gives the following example:
Sets the bitmap displayed in the icon to bitmap.
If nil is passed, the icon’s bitmap setting is erased. If the
argument is omitted, the current setting is returned.
p Tk.root.iconbitmap “question”
Perhaps this code can change the window icon on platforms running X-
Window/Motif, but I can’t say from experience.
Running it on my platform, OS X with Aqua, produces no visible
effect. But how could it? From OS X’s point of view the Ruby program
is a Unix command line session, and it displays the appropriate icon
for such a session in the dock. If I minimize a Tk window, I get a
bitmap thumbnail of the running window in the dock (again normal for
On OS X, I could get a custom icon by making the Ruby program a
component of an application package (bundle) containing an icon
resource, an info.plist file, and a launcher script written in
AppleScript. On MS Windows, it’s probably all very different. I
wouldn’t have a clue on how get a custom program icon there.