Mercurial > sdl-ios-xcode
view test/testjoystick.c @ 3877:81f66f258d77 SDL-1.2
Fixed bug #281
------- Comment #2 From Christian Walther 2006-07-23 07:37 [reply] -------
Wow, that was an interesting bug to chase. It was a timing issue: it seems that
for some reason, a certain time must pass between ShowMenuBar() being called in
QZ_UnsetVideoMode() and the application quitting. Before rev. 1885, this delay
was provided by the slow hand-coded fade. With the asynchronous Core Graphics
fading introduced in rev. 1885, that delay was no longer present (most of the
time) and the bug became apparent. Adding an SDL_Delay(100) somewhere between
ShowMenuBar() and the end of QZ_VideoQuit() lowered the frequency of the bug
appearing from "almost every time" to "very rarely" here.
However, there is another solution: doing the ShowMenuBar() before releasing
the captured display instead of afterwards. Apparently, no delay is necessary
in that case, and it looks nicer to me anyway because it is the reverse order
of the way things are set up in the beginning: capture display - set video mode
- hide menu bar - ... - show menu bar - reset video mode - release captured
display. So, this is what the attached patch does.
In addition, I've taken the liberty of
- removing some unused code that I forgot to remove in rev. 1885,
- fixing two warnings about undeclared functions in SDL_QuartzVideo.m by
including OpenGL.h (whose name is a bit misleading - it only declares CGL
stuff, so there's no interference with SDL_opengl.h).
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 24 Sep 2006 01:27:40 +0000 |
parents | 5ff2c01e475e |
children | c121d94672cb 3d9040dcc47e |
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line source
/* Simple program to test the SDL joystick routines */ #include <stdio.h> #include <stdlib.h> #include <string.h> #include "SDL.h" #define SCREEN_WIDTH 640 #define SCREEN_HEIGHT 480 void WatchJoystick(SDL_Joystick *joystick) { SDL_Surface *screen; const char *name; int i, done; SDL_Event event; int x, y, draw; SDL_Rect axis_area[2]; /* Set a video mode to display joystick axis position */ screen = SDL_SetVideoMode(SCREEN_WIDTH, SCREEN_HEIGHT, 16, 0); if ( screen == NULL ) { fprintf(stderr, "Couldn't set video mode: %s\n",SDL_GetError()); return; } /* Print info about the joystick we are watching */ name = SDL_JoystickName(SDL_JoystickIndex(joystick)); printf("Watching joystick %d: (%s)\n", SDL_JoystickIndex(joystick), name ? name : "Unknown Joystick"); printf("Joystick has %d axes, %d hats, %d balls, and %d buttons\n", SDL_JoystickNumAxes(joystick), SDL_JoystickNumHats(joystick), SDL_JoystickNumBalls(joystick),SDL_JoystickNumButtons(joystick)); /* Initialize drawing rectangles */ memset(axis_area, 0, (sizeof axis_area)); draw = 0; /* Loop, getting joystick events! */ done = 0; while ( ! done ) { while ( SDL_PollEvent(&event) ) { switch (event.type) { case SDL_JOYAXISMOTION: printf("Joystick %d axis %d value: %d\n", event.jaxis.which, event.jaxis.axis, event.jaxis.value); break; case SDL_JOYHATMOTION: printf("Joystick %d hat %d value:", event.jhat.which, event.jhat.hat); if ( event.jhat.value == SDL_HAT_CENTERED ) printf(" centered"); if ( event.jhat.value & SDL_HAT_UP ) printf(" up"); if ( event.jhat.value & SDL_HAT_RIGHT ) printf(" right"); if ( event.jhat.value & SDL_HAT_DOWN ) printf(" down"); if ( event.jhat.value & SDL_HAT_LEFT ) printf(" left"); printf("\n"); break; case SDL_JOYBALLMOTION: printf("Joystick %d ball %d delta: (%d,%d)\n", event.jball.which, event.jball.ball, event.jball.xrel, event.jball.yrel); break; case SDL_JOYBUTTONDOWN: printf("Joystick %d button %d down\n", event.jbutton.which, event.jbutton.button); break; case SDL_JOYBUTTONUP: printf("Joystick %d button %d up\n", event.jbutton.which, event.jbutton.button); break; case SDL_KEYDOWN: if ( event.key.keysym.sym != SDLK_ESCAPE ) { break; } /* Fall through to signal quit */ case SDL_QUIT: done = 1; break; default: break; } } /* Update visual joystick state */ for ( i=0; i<SDL_JoystickNumButtons(joystick); ++i ) { SDL_Rect area; area.x = i*34; area.y = SCREEN_HEIGHT-34; area.w = 32; area.h = 32; if (SDL_JoystickGetButton(joystick, i) == SDL_PRESSED) { SDL_FillRect(screen, &area, 0xFFFF); } else { SDL_FillRect(screen, &area, 0x0000); } SDL_UpdateRects(screen, 1, &area); } /* Erase previous axes */ SDL_FillRect(screen, &axis_area[draw], 0x0000); /* Draw the X/Y axis */ draw = !draw; x = (((int)SDL_JoystickGetAxis(joystick, 0))+32768); x *= SCREEN_WIDTH; x /= 65535; if ( x < 0 ) { x = 0; } else if ( x > (SCREEN_WIDTH-16) ) { x = SCREEN_WIDTH-16; } y = (((int)SDL_JoystickGetAxis(joystick, 1))+32768); y *= SCREEN_HEIGHT; y /= 65535; if ( y < 0 ) { y = 0; } else if ( y > (SCREEN_HEIGHT-16) ) { y = SCREEN_HEIGHT-16; } axis_area[draw].x = (Sint16)x; axis_area[draw].y = (Sint16)y; axis_area[draw].w = 16; axis_area[draw].h = 16; SDL_FillRect(screen, &axis_area[draw], 0xFFFF); SDL_UpdateRects(screen, 2, axis_area); } } int main(int argc, char *argv[]) { const char *name; int i; SDL_Joystick *joystick; /* Initialize SDL (Note: video is required to start event loop) */ if ( SDL_Init(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK) < 0 ) { fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError()); exit(1); } /* Print information about the joysticks */ printf("There are %d joysticks attached\n", SDL_NumJoysticks()); for ( i=0; i<SDL_NumJoysticks(); ++i ) { name = SDL_JoystickName(i); printf("Joystick %d: %s\n",i,name ? name : "Unknown Joystick"); } if ( argv[1] ) { joystick = SDL_JoystickOpen(atoi(argv[1])); if ( joystick == NULL ) { printf("Couldn't open joystick %d: %s\n", atoi(argv[1]), SDL_GetError()); } else { WatchJoystick(joystick); SDL_JoystickClose(joystick); } } SDL_QuitSubSystem(SDL_INIT_VIDEO|SDL_INIT_JOYSTICK); return(0); }