diff options
Diffstat (limited to 'win')
| -rw-r--r-- | win/tkWinKey.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/win/tkWinKey.c b/win/tkWinKey.c index f197e5a..e8833fa 100644 --- a/win/tkWinKey.c +++ b/win/tkWinKey.c @@ -9,7 +9,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tkWinKey.c,v 1.10 2000/04/15 00:33:08 ericm Exp $ + * RCS: @(#) $Id: tkWinKey.c,v 1.11 2000/04/15 02:50:26 ericm Exp $ */ #include "tkWinInt.h" @@ -264,9 +264,29 @@ KeycodeToKeysym(keycode, state, noascii) /* * Keycode mapped to a valid Latin-1 character. Since the keysyms * for alphanumeric characters map onto Latin-1, we just return it. + * + * We treat 0x7F as a special case mostly for backwards compatibility. + * In older versions of Tk, Control-Backspace returned "XK_BackSpace" + * as the X Keysym. This was due to the fact that we did not + * initialize the keys array properly when we passed it to ToAscii, above. + * We had previously not been setting the state bit for the Control key. + * When we fixed that, we found that Control-Backspace on Windows is + * interpreted as ASCII-127 (0x7F), which corresponds to the Delete key. + * + * Upon discovering this, we realized we had two choices: return XK_Delete + * or return XK_BackSpace. If we returned XK_Delete, that could be + * considered "more correct" (although the correctness would be dependant + * on whether you believe that ToAscii is doing the right thing in that + * case); however, this would break backwards compatibility, and worse, + * it would limit application programmers -- they would effectively be + * unable to bind to <Control-Backspace> on Windows. We therefore chose + * instead to return XK_BackSpace (handled here by letting the code + * "fall-through" to the return statement below, which works because the + * keycode for this event is VK_BACKSPACE, and the keymap table maps that + * keycode to XK_BackSpace). */ - if (result == 1 && UCHAR(buf[0]) >= 0x20) { + if (result == 1 && UCHAR(buf[0]) >= 0x20 && UCHAR(buf[0]) != 0x7F) { return (KeySym) UCHAR(buf[0]); } |