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view docs/man3/SDLKey.3 @ 1212:7663bb0f52c7
To: sdl@libsdl.org
From: Christian Walther <cwalther@gmx.ch>
Date: Thu, 15 Dec 2005 21:19:53 +0100
Subject: [SDL] More mouse enhancements for Mac OS X
The attached patch brings two more enhancements to mouse handling on Mac
OS X (Quartz):
1. Currently, after launching an SDL application, SDL's notion of the
mouse position is stuck in the top left corner (0,0) until the first
time the mouse is moved. That's because the UpdateMouse() function isn't
implemented in the Quartz driver. This patch adds it.
2. When grabbing input while the mouse cursor is hidden, the function
CGAssociateMouseAndMouseCursorPosition(0) is called, which prevents the
system's notion of the mouse location from moving (and therefore leaving
the SDL window) even when the mouse is moved. However, apparently the
Wacom tablet driver (and maybe other special pointing device drivers)
doesn't care about that setting and still allows the mouse location to
go outside of the window. Interestingly, the system cursor, which is
made visible by the existing code in SDL in that case, does not follow
the mouse location, but appears in the middle of the SDL window. The
mouse location being outside of the window however means that mouse
button events go to background applications (or the dock or whatever is
there), which is very confusing to the user who sees no cursor outside
of the SDL window.
I have not found any way of intercepting these events (and that's
probably by design, as "normal" applications shouldn't prevent the user
from bringing other applications' windows to the front by clicking on
them). An idea would be placing a fully transparent, screen-filling
window in front of everything, but I fear that this might affect
rendering performance (by doing unnecessary compositing, using up
memory, or whatever).
The deluxe solution to the problem would be talking to the tablet
driver using AppleEvents to tell it to constrain its mapped area to the
window (see Wacom's "TabletEventDemo" sample app,
http://www.wacomeng.com/devsupport/mac/downloads.html), but I think that
the bloat that solution would add to SDL would outweigh its usefulness.
What I did instead in my patch is reassociating mouse and cursor when
the mouse leaves the window while an invisible grab is in effect, and
restoring the grab when the window is entered. That way, the grab can
still be effectively broken by a tablet, but at least it's obvious to
the user that it is broken. That change is minimal - it doesn't affect
operation with a mouse (or a trackpad), and the code that it adds is not
executed on every PumpEvents() call, only when entering and leaving the
window.
Unless there are any concerns about the patch, please apply. Feel free
to shorten the lengthy comment in SDL_QuartzEvents.m if you think it's
too verbose.
Thanks
-Christian
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 02 Jan 2006 00:31:00 +0000 |
| parents | 74212992fb08 |
| children | 546f7c1eb755 |
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.TH "SDLKey" "3" "Wed 11 Oct 2000, 22:28" "SDL" "SDL API Reference" .SH "NAME" SDLKey\- SDL Keysym Definitions .SH "SDL Keysym definitions" .PP \fBSDLKey ASCII value Common Name\fR .nf \f(CWSDLK_BACKSPACE '\\b' backspace SDLK_TAB '\\t' tab SDLK_CLEAR clear SDLK_RETURN '\\r' return SDLK_PAUSE pause SDLK_ESCAPE '^[' escape SDLK_SPACE ' ' space SDLK_EXCLAIM '!' exclaim SDLK_QUOTEDBL '"' quotedbl SDLK_HASH '#' hash SDLK_DOLLAR '$' dollar SDLK_AMPERSAND '&' ampersand SDLK_QUOTE ''' quote SDLK_LEFTPAREN '(' left parenthesis SDLK_RIGHTPAREN ')' right parenthesis SDLK_ASTERISK '*' asterisk SDLK_PLUS '+' plus sign SDLK_COMMA ',' comma SDLK_MINUS '-' minus sign SDLK_PERIOD '.' period SDLK_SLASH '/' forward slash SDLK_0 '0' 0 SDLK_1 '1' 1 SDLK_2 '2' 2 SDLK_3 '3' 3 SDLK_4 '4' 4 SDLK_5 '5' 5 SDLK_6 '6' 6 SDLK_7 '7' 7 SDLK_8 '8' 8 SDLK_9 '9' 9 SDLK_COLON ':' colon SDLK_SEMICOLON ';' semicolon SDLK_LESS '<' less-than sign SDLK_EQUALS '=' equals sign SDLK_GREATER '>' greater-than sign SDLK_QUESTION '?' question mark SDLK_AT '@' at SDLK_LEFTBRACKET '[' left bracket SDLK_BACKSLASH '\\' backslash SDLK_RIGHTBRACKET ']' right bracket SDLK_CARET '^' caret SDLK_UNDERSCORE '_' underscore SDLK_BACKQUOTE '`' grave SDLK_a 'a' a SDLK_b 'b' b SDLK_c 'c' c SDLK_d 'd' d SDLK_e 'e' e SDLK_f 'f' f SDLK_g 'g' g SDLK_h 'h' h SDLK_i 'i' i SDLK_j 'j' j SDLK_k 'k' k SDLK_l 'l' l SDLK_m 'm' m SDLK_n 'n' n SDLK_o 'o' o SDLK_p 'p' p SDLK_q 'q' q SDLK_r 'r' r SDLK_s 's' s SDLK_t 't' t SDLK_u 'u' u SDLK_v 'v' v SDLK_w 'w' w SDLK_x 'x' x SDLK_y 'y' y SDLK_z 'z' z SDLK_DELETE '^?' delete SDLK_KP0 keypad 0 SDLK_KP1 keypad 1 SDLK_KP2 keypad 2 SDLK_KP3 keypad 3 SDLK_KP4 keypad 4 SDLK_KP5 keypad 5 SDLK_KP6 keypad 6 SDLK_KP7 keypad 7 SDLK_KP8 keypad 8 SDLK_KP9 keypad 9 SDLK_KP_PERIOD '.' keypad period SDLK_KP_DIVIDE '/' keypad divide SDLK_KP_MULTIPLY '*' keypad multiply SDLK_KP_MINUS '-' keypad minus SDLK_KP_PLUS '+' keypad plus SDLK_KP_ENTER '\\r' keypad enter SDLK_KP_EQUALS '=' keypad equals SDLK_UP up arrow SDLK_DOWN down arrow SDLK_RIGHT right arrow SDLK_LEFT left arrow SDLK_INSERT insert SDLK_HOME home SDLK_END end SDLK_PAGEUP page up SDLK_PAGEDOWN page down SDLK_F1 F1 SDLK_F2 F2 SDLK_F3 F3 SDLK_F4 F4 SDLK_F5 F5 SDLK_F6 F6 SDLK_F7 F7 SDLK_F8 F8 SDLK_F9 F9 SDLK_F10 F10 SDLK_F11 F11 SDLK_F12 F12 SDLK_F13 F13 SDLK_F14 F14 SDLK_F15 F15 SDLK_NUMLOCK numlock SDLK_CAPSLOCK capslock SDLK_SCROLLOCK scrollock SDLK_RSHIFT right shift SDLK_LSHIFT left shift SDLK_RCTRL right ctrl SDLK_LCTRL left ctrl SDLK_RALT right alt SDLK_LALT left alt SDLK_RMETA right meta SDLK_LMETA left meta SDLK_LSUPER left windows key SDLK_RSUPER right windows key SDLK_MODE mode shift SDLK_HELP help SDLK_PRINT print-screen SDLK_SYSREQ SysRq SDLK_BREAK break SDLK_MENU menu SDLK_POWER power SDLK_EURO euro\fR .fi .SH "SDL modifier definitions" .PP \fBSDL Modifier Meaning\fR .nf \f(CWKMOD_NONE No modifiers applicable KMOD_NUM Numlock is down KMOD_CAPS Capslock is down KMOD_LCTRL Left Control is down KMOD_RCTRL Right Control is down KMOD_RSHIFT Right Shift is down KMOD_LSHIFT Left Shift is down KMOD_RALT Right Alt is down KMOD_LALT Left Alt is down KMOD_CTRL A Control key is down KMOD_SHIFT A Shift key is down KMOD_ALT An Alt key is down\fR .fi