Re: Gtk2::Entry catching a keypress?

[muppet <scott asofyet org>]

On Jul 30, 2008, at 10:36 AM, zentara wrote:

> $entry->signal_connect ('key-press-event' => sub {

To expound a bit. this is a standard Gtk2::Widget signal, available  
for all widgets, but it works only on widgets which have a GdkWindow.   
A widget must have a GdkWindow in order to receive events (because the  
GdkWindow corresponds to the XWindow, which is where the X events  
actually go).  There are lots of subtleties there and i wish i could  
relate how i learned them, but i don't remember.  :-/

$widget->no_window  returns true for widgets which have no GdkWindow,  
such as Label or Image.

Also, even on a windowed widget, the window isn't created until the  
widget is "realized" (that is, the realize signal is emitted).  In  
layman's terms, the key events won't show up until the widget it on  
the screen.


--
If the monkey could type one keystroke every nanosecond, the expected  
waiting time until the monkey types out Hamlet is so long that the  
estimated age of the universe is insignificant by comparison ... this  
is not a practical method for writing plays.
  -- Gian-Carlo Rota