Re: Getting keyboard state.

[Philip Kendall <pak ast cam ac uk>]

On Fri, Jan 12, 2001 at 01:06:24PM +0700, Maxim Koshelev wrote:
> Hi there!
> Does somebody know how to get state of the keyboard via gtk/gdk?
> I just need to know about current state of Shift key in my program.

Connect handlers to both the `key-press-event' and `key-release-event'
for the appropriate widgets. (`key-release-event' isn't received by
default, so you'll need a call along the lines of

gtk_widget_add_events( widget, GDK_KEY_RELEASE_MASK );

to make sure you get them).

Then every time you get a key press event with event->key.keyval being
either `GDK_Shift_L' or `GDK_Shift_R', set a flag. Clear the flag on the
corresponding key release events (making sure you deal properly with a
sequence like Shift_L pressed, Shift_R pressed, Shift_R released).

Or if you only need shift when combined with other keys, just look at
bit 0 of event->key.state.

HTH,

Phil

-- 
  Philip Kendall <pak ast cam ac uk>
  http://www.srcf.ucam.org/~pak21/