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Fixed bug 4709 - incorrect (not) handling of windows on-screen cursor keys 

Alex Denisov

When using Win10 on-screen keyboard (tooltip.exe), the left and right cursor keys in it do not produce SDLK_LEFT and SDLK_RIGHT events.

Windows messages generated by the on-screen keyboard, for some reason, have their scancodes set to zeroes. Here is the log from Spy++:

WM_KEYDOWN nVirtKey:VK_LEFT cRepeat:1 ScanCode:00 fExtended:0 fAltDown:0 fRepeat:0 fUp:0
WM_KEYUP nVirtKey:VK_LEFT cRepeat:1 ScanCode:00 fExtended:0 fAltDown:0 fRepeat:1 fUp:1

Regular physical keyboard produces VK_LEFT (ScanCode:4B) and VK_RIGHT (ScanCode:4D) which are interpreted correctly.

With on-screen keyboard, the switch statement in VKeytoScancode() does not check for VK_LEFT and VK_RIGHT, returning SDL_SCANCODE_UNKNOWN, which in turn does not get mapped to anything (because the scan codes are zeroes).
This commit is contained in:
Sam Lantinga 2020-02-11 08:36:13 -08:00
parent 232b7feef6
commit f867cebbd4
1 changed files with 5 additions and 0 deletions
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5
src/video/windows/SDL_windowsevents.c
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@ -86,6 +86,11 @@ VKeytoScancode(WPARAM vkey)
/* Windows generates this virtual keycode for Keypad 5 when NumLock is off.
case VK_CLEAR: return SDL_SCANCODE_CLEAR;
*/
case VK_LEFT: return SDL_SCANCODE_LEFT;
case VK_UP: return SDL_SCANCODE_UP;
case VK_RIGHT: return SDL_SCANCODE_RIGHT;
case VK_DOWN: return SDL_SCANCODE_DOWN;
case VK_MODECHANGE: return SDL_SCANCODE_MODE;
case VK_SELECT: return SDL_SCANCODE_SELECT;
case VK_EXECUTE: return SDL_SCANCODE_EXECUTE;