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8c921d8201
This is implemented via a low-level keyboard hook. Unfortunately, this is rather invasive, but it's how Microsoft recommends that it be done [0]. We want to do as little as possible in the hook, so we only intercept a few crucial modifier keys there, while leaving other keys to the normal event processing flow. We will only install this hook if SDL_HINT_GRAB_KEYBOARD=1, which is not the default. This will reduce any compatibility concerns to just the SDL applications that explicitly ask for this behavior. We also remove the hook when the grab is terminated to ensure that we're not unnecessarily staying involved in key event processing when it's not required anymore. [0]: https://docs.microsoft.com/en-us/windows/win32/dxtecharts/disabling-shortcut-keys-in-games
38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
/*
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Simple DirectMedia Layer
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Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#ifndef SDL_windowsevents_h_
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#define SDL_windowsevents_h_
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extern LPTSTR SDL_Appname;
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extern Uint32 SDL_Appstyle;
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extern HINSTANCE SDL_Instance;
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extern LRESULT CALLBACK WIN_KeyboardHookProc(int nCode, WPARAM wParam, LPARAM lParam);
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extern LRESULT CALLBACK WIN_WindowProc(HWND hwnd, UINT msg, WPARAM wParam,
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LPARAM lParam);
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extern void WIN_PumpEvents(_THIS);
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#endif /* SDL_windowsevents_h_ */
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/* vi: set ts=4 sw=4 expandtab: */
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