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Fixed handling of some keystrokes on win32. Pressing a dead key 

and then space should convert the dead key to a non-dead key but
previous the key was discarded.  Fixed that but VkKeyScan() fails
in this case so added special case to fix that (assuming AltGr is
required).  VkKeyScan() can return the wrong result for characters
that have more than one virtual key mapped to them.  AltGr+9 (^)
on the French layout has this problem.  Now detecting that problem
and using the current keyboard state to decide if AltGr is
required.
This commit is contained in:
crs 2003-07-13 20:42:11 +00:00
parent be07a171cc
commit 5488b77d61
1 changed files with 33 additions and 7 deletions
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40
lib/platform/CMSWindowsPrimaryScreen.cpp
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@ -1144,7 +1144,7 @@ static const KeyID g_virtualKey[][2] =
/* 0x1d */ kKeyNone, kKeyNone, // VK_NONCONVERT
/* 0x1e */ kKeyNone, kKeyNone, // VK_ACCEPT
/* 0x1f */ kKeyNone, kKeyNone, // VK_MODECHANGE
/* 0x20 */ 0x0020, kKeyNone, // VK_SPACE
/* 0x20 */ kKeyNone, kKeyNone, // VK_SPACE
/* 0x21 */ kKeyKP_PageUp, kKeyPageUp, // VK_PRIOR
/* 0x22 */ kKeyKP_PageDown, kKeyPageDown, // VK_NEXT
/* 0x23 */ kKeyKP_End, kKeyEnd, // VK_END
@ -1421,7 +1421,8 @@ CMSWindowsPrimaryScreen::mapKey(
// convert to ascii
WORD ascii;
int result = ToAscii(vkCode, scanCode, m_keys, &ascii, 0);
int result = ToAscii(vkCode, scanCode, m_keys, &ascii,
((menu & 0x80) == 0) ? 0 : 1);
// restore control state
m_keys[VK_LCONTROL] = lControl;
@ -1504,13 +1505,38 @@ CMSWindowsPrimaryScreen::mapKey(
// set mask
*altgr = false;
if (id != kKeyNone && id != kKeyMultiKey && c != 0) {
// note if key requires AltGr
SHORT virtualKeyAndModifierState = VkKeyScan(c);
BYTE modifierState = HIBYTE(virtualKeyAndModifierState);
if ((modifierState & 6) == 6) {
// key requires ctrl and alt == AltGr
// note if key requires AltGr. VkKeyScan() can have a problem
// with some characters. there are two problems in particular.
// first, typing a dead key then pressing space will cause
// VkKeyScan() to return 0xffff. second, certain characters
// may map to multiple virtual keys and we might get the wrong
// one. if that happens then we might not get the right
// modifier mask. AltGr+9 on the french keyboard layout (^)
// has this problem. in the first case, we'll assume AltGr is
// required (only because it solves the problems we've seen
// so far). in the second, we'll use whatever the keyboard
// state says.
WORD virtualKeyAndModifierState = VkKeyScan(c);
if (virtualKeyAndModifierState == 0xffff) {
// there is no mapping. assume AltGr.
LOG((CLOG_DEBUG1 "no VkKeyScan() mapping"));
*altgr = true;
}
else if (LOBYTE(virtualKeyAndModifierState) != vkCode) {
// we didn't get the key that was actually pressed
LOG((CLOG_DEBUG1 "VkKeyScan() mismatch"));
if ((m_keys[VK_CONTROL] & 0x80) != 0 &&
(m_keys[VK_MENU] & 0x80) != 0) {
*altgr = true;
}
}
else {
BYTE modifierState = HIBYTE(virtualKeyAndModifierState);
if ((modifierState & 6) == 6) {
// key requires ctrl and alt == AltGr
*altgr = true;
}
}
// map modifier key
KeyModifierMask mask = 0;