Mercurial > sdl-ios-xcode
view src/video/wincommon/SDL_lowvideo.h @ 563:04dcaf3da918
Massive Quartz input enhancements from Darrell Walisser. His email:
Enclosed is a patch that addresses the following:
--Various minor cleanups.
Removed dead/obsolete code, made some style cleanups
--Mouse Events
Now keep track of what button(s) were pressed so we know when to send
the mouse up event. This fixes the case where the mouse is dragged
outside of the game window and released (in which case we want to send
the mouse up event even though the mouse is outside the game window).
--Input Grabbing
Here is my take on the grabbing situation, which is the basis for the
new implementation.
There are 3 grab states, ungrabbed (UG), visible (VG), and invisible
(IG). Both VG and IG keep the mouse constrained to the window and
produce relative motion events. In VG the cursor is visible (duh), in
IG it is not. In VG, absolute motion events also work.
There are 6 actions that can affect grabbing:
1. Set Fullscreen/Window (F/W). In fullscreen, a visible grab should do
nothing. However, a fullscreen visible grab can be treated just like a
windowed visible grab, which is what I have done to help simplify
things.
2. Cursor hide/show (H/S). If the cursor is hidden when grabbing, the
grab is an invisible grab. If the cursor is visible, the grab should
just constrain the mouse to the window.
3. Input grab/ungrab(G/U). If grabbed, the cursor should be confined to
the window as should the keyboard input. On Mac OS X, the keyboard
input is implicitly grabbed by confining the cursor, except for
command-tab which can switch away from the application. Should the
window come to the foreground if the application is deactivated and
grab input is called? This isn't necessary in this implementation
because the grab state will be asserted upon activation.
Using my notation, these are all the cases that need to be handled
(state + action = new state).
UG+U = UG
UG+G = VG or IG, if cursor is visible or not
UG+H = UG
UG+S = UG
VG+U = UG
VG+G = VG
VG+H = IG
VG+S = VG
IG+U = UG
IG+G = IG
IG+H = IG
IG+S = VG
The cases that result in the same state can be ignored in the code,
which cuts it down to just 5 cases.
Another issue is what happens when the app loses/gains input focus from
deactivate/activate or iconify/deiconify. I think that if input focus
is ever lost (outside of SDL's control), the grab state should be
suspended and the cursor should become visible and active again. When
regained, the cursor should reappear in its original location and/or
grab state. This way, when reactivating the cursor is still in the same
position as before so apps shouldn't get confused when the next motion
event comes in. This is what I've done in this patch.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Fri, 27 Dec 2002 20:52:41 +0000 |
| parents | a6fa62b1be09 |
| children | b8d311d90021 |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org */ #ifdef SAVE_RCSID static char rcsid = "@(#) $Id$"; #endif #ifndef _SDL_lowvideo_h #define _SDL_lowvideo_h #include <windows.h> #include "SDL_sysvideo.h" /* Hidden "this" pointer for the video functions */ #define _THIS SDL_VideoDevice *this #define WINDIB_FULLSCREEN() \ ( \ SDL_VideoSurface && \ ((SDL_VideoSurface->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN) && \ (((SDL_VideoSurface->flags & SDL_OPENGL ) == SDL_OPENGL ) || \ (strcmp(this->name, "windib") == 0)) \ ) #define DDRAW_FULLSCREEN() \ ( \ SDL_VideoSurface && \ ((SDL_VideoSurface->flags & SDL_FULLSCREEN) == SDL_FULLSCREEN) && \ ((SDL_VideoSurface->flags & SDL_OPENGL ) != SDL_OPENGL ) && \ (strcmp(this->name, "directx") == 0) \ ) #define DINPUT_FULLSCREEN() DDRAW_FULLSCREEN() /* The main window -- and a function to set it for the audio */ #ifdef _WIN32_WCE extern LPWSTR SDL_Appname; #else extern LPSTR SDL_Appname; #endif extern HINSTANCE SDL_Instance; extern HWND SDL_Window; extern const char *SDL_windowid; /* Variables and functions exported to other parts of the native video subsystem (SDL_sysevents.c) */ /* Called by windows message loop when system palette is available */ extern void (*WIN_RealizePalette)(_THIS); /* Called by windows message loop when the system palette changes */ extern void (*WIN_PaletteChanged)(_THIS, HWND window); /* Called by windows message loop when a portion of the screen needs update */ extern void (*WIN_WinPAINT)(_THIS, HDC hdc); /* Called by windows message loop when the message isn't handled */ extern LONG (*HandleMessage)(_THIS, HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam); /* The window cursor (from SDL_sysmouse.c) */ extern HCURSOR SDL_hcursor; /* The bounds of the window in screen coordinates */ extern RECT SDL_bounds; /* Flag -- SDL is performing a resize, rather than the user */ extern int SDL_resizing; /* Flag -- the mouse is in relative motion mode */ extern int mouse_relative; /* The GDI fullscreen mode currently active */ #ifndef NO_CHANGEDISPLAYSETTINGS extern DEVMODE SDL_fullscreen_mode; #endif /* The system gamma ramp for GDI modes */ extern WORD *gamma_saved; /* This is really from SDL_dx5audio.c */ extern void DX5_SoundFocus(HWND window); /* DJM: This is really from SDL_sysevents.c, we need it in GDL_CreateWindow as well */ LONG CALLBACK WinMessage(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam); #endif /* SDL_lowvideo_h */