Holding Buttons in DOS
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I'm trying to emulate Win32-style key events in DOS. I need a *different*
way of reading the keyboard.
Here's a typical problem with the way the keyboard is currently handled. I'm
trying to emulate Win32 button behavior in DOS. Pressing down the spacebar
when the focus is on the button toggles the button, and it is held down
until the space bar is released. You can tab off the button, even if it is
pressed, and not have it selected.
When I try to duplicate this in DOS, holding down a button triggers the auto
repeat on the key, and I end up getting a stream of keys. Even if I wait for
-1 event on get_key() to emulate a key up/down type behavior, the auto
repeat clicks away - very irritating.
Win32 splits a button press into three seperate events: key down, key up,
and key press. For example, if you hold down the Space bar, you might get
the following events queued:
Space key down
Space key pressed
Space key pressed
Space key pressed
Space key pressed
Space key up
How do I query the keyboard to get this information? I've seen this done in
Allegro, but they replace the DOS interrupt with one of their own, and I'm
not big on writing interrupts myself...
Thanks!
-- David Cuny
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<P><FONT SIZE=3D2>I'm trying to emulate Win32-style key events in DOS. =
I need a *different* way of reading the keyboard. </FONT>
</P>
<P><FONT SIZE=3D2>Here's a typical problem with the way the keyboard is =
currently handled. I'm trying to emulate Win32 button behavior in DOS. =
Pressing down the spacebar when the focus is on the button toggles the =
button, and it is held down until the space bar is released. You can =
tab off the button, even if it is pressed, and not have it =
selected.</FONT></P>
<P><FONT SIZE=3D2>When I try to duplicate this in DOS, holding down a =
button triggers the auto repeat on the key, and I end up getting a =
stream of keys. Even if I wait for -1 event on get_key() to emulate a =
key up/down type behavior, the auto repeat clicks away - very =
irritating.</FONT></P>
<P><FONT SIZE=3D2>Win32 splits a button press into three seperate =
events: key down, key up, and key press. For example, if you hold down =
the Space bar, you might get the following events queued:</FONT></P>
<P> <FONT SIZE=3D2>Space key =
down</FONT>
<BR> <FONT SIZE=3D2>Space key =
pressed</FONT>
<BR> <FONT SIZE=3D2>Space key =
pressed</FONT>
<BR> <FONT SIZE=3D2>Space key =
pressed</FONT>
<BR> <FONT SIZE=3D2>Space key =
pressed</FONT>
<BR> <FONT SIZE=3D2>Space key =
up</FONT>
</P>
<P><FONT SIZE=3D2>How do I query the keyboard to get this information? =
I've seen this done in Allegro, but they replace the DOS interrupt with =
one of their own, and I'm not big on writing interrupts =
myself...</FONT></P>
<P><FONT SIZE=3D2>Thanks!</FONT>
</P>
<P><FONT SIZE=3D2>-- David Cuny</FONT>
</P>
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