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Windows: process the +-containing key used with Ctrl in cross-platform way

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ManoloFLTK 2024-10-19 09:14:45 +02:00
parent 04c8dd9d26
commit 6ea450407b
1 changed files with 40 additions and 0 deletions
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src/Fl_win32.cxx
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@ -1573,6 +1573,46 @@ static LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lPar
#endif
}
Fl::e_text = buffer;
// Kludge to process the +-containing key in cross-platform way when used with Ctrl
/* Table of how Windows processes the '+'-containing key by keyboard layout
key virtual
content key keyboard layout
=|+ 0xbb US/UK/Fr/Arabic/Chinese/Hebrew/Brazil/Russian/Vietnam/Japan/Korean/Persian
+|* 0xbb German/Spanish/Italy/Greek/Portugal
+|? 0xbb Swedish/Finish/Norway
+|± 0xbb Dutch
1|+ '1' Swiss/Luxemburg
3|+ '3' Hungarian
4|+ '4' Turkish
*/
if (Fl::e_state & FL_CTRL) { // extra processing necessary only when Ctrl is down
int vk_plus_key = (VkKeyScanA('+') & 0xff); // virtual key of '+'-containing key
bool plus_shift_pos = ((VkKeyScanA('+') & 0x100) != 0); // true means '+' in shifted position
int plus_other_char; // the other char on same key as '+'
if (plus_shift_pos) plus_other_char = ms2fltk(vk_plus_key, 0);
else if ((VkKeyScanA('*') & 0xff) == vk_plus_key) plus_other_char = '*'; // German
else if ((VkKeyScanA('?') & 0xff) == vk_plus_key) plus_other_char = '?'; // Swedish
else if ((VkKeyScanW(L'±') & 0xff) == vk_plus_key) plus_other_char = L'±'; // Dutch
else plus_other_char = '='; // fallback
//fprintf(stderr, "plus_shift_pos=%d plus_other_char='%c' vk+=0x%x\n", plus_shift_pos,
// plus_other_char, vk_plus_key);
if ( (vk_plus_key == 0xbb && Fl::e_keysym == '=') || // the '+'-containing key is down
(plus_shift_pos && Fl::e_keysym == plus_other_char) ) {
Fl::e_keysym = (plus_shift_pos ? plus_other_char : '+');
static char plus_other_char_utf8[4];
int lutf8 = fl_utf8encode(plus_other_char, plus_other_char_utf8);
plus_other_char_utf8[lutf8] = 0;
if (plus_shift_pos) {
Fl::e_text = ( (Fl::e_state & FL_SHIFT) ? (char*)"+" : plus_other_char_utf8 );
} else {
Fl::e_text = ( (Fl::e_state & FL_SHIFT) ? plus_other_char_utf8 : (char*)"+" );
}
Fl::e_length = strlen(Fl::e_text);
}
}
// end of processing of the +-containing key
if (lParam & (1 << 31)) { // key up events.
if (Fl::handle(FL_KEYUP, window))
return 0;