mirror of
https://github.com/joel16/SDL2.git
synced 2024-12-12 21:46:13 +00:00
137 lines
2.8 KiB
C
137 lines
2.8 KiB
C
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/* Simple program: Loop, watching keystrokes
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Note that you need to call SDL_PollEvent() or SDL_WaitEvent() to
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pump the event loop and catch keystrokes.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "SDL.h"
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static void print_modifiers(void)
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{
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int mod;
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printf(" modifiers:");
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mod = SDL_GetModState();
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if(!mod) {
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printf(" (none)");
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return;
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}
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if(mod & KMOD_LSHIFT)
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printf(" LSHIFT");
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if(mod & KMOD_RSHIFT)
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printf(" RSHIFT");
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if(mod & KMOD_LCTRL)
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printf(" LCTRL");
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if(mod & KMOD_RCTRL)
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printf(" RCTRL");
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if(mod & KMOD_LALT)
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printf(" LALT");
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if(mod & KMOD_RALT)
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printf(" RALT");
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if(mod & KMOD_LMETA)
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printf(" LMETA");
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if(mod & KMOD_RMETA)
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printf(" RMETA");
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if(mod & KMOD_NUM)
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printf(" NUM");
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if(mod & KMOD_CAPS)
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printf(" CAPS");
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if(mod & KMOD_MODE)
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printf(" MODE");
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}
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static void PrintKey(SDL_keysym *sym, int pressed)
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{
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/* Print the keycode, name and state */
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if ( sym->sym ) {
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printf("Key %s: %d-%s ", pressed ? "pressed" : "released",
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sym->sym, SDL_GetKeyName(sym->sym));
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} else {
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printf("Unknown Key (scancode = %d) %s ", sym->scancode,
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pressed ? "pressed" : "released");
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}
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/* Print the translated character, if one exists */
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if ( sym->unicode ) {
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/* Is it a control-character? */
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if ( sym->unicode < ' ' ) {
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printf(" (^%c)", sym->unicode+'@');
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} else {
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#ifdef UNICODE
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printf(" (%c)", sym->unicode);
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#else
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/* This is a Latin-1 program, so only show 8-bits */
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if ( !(sym->unicode & 0xFF00) )
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printf(" (%c)", sym->unicode);
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#endif
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}
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}
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print_modifiers();
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printf("\n");
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}
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int main(int argc, char *argv[])
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{
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SDL_Event event;
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int done;
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Uint32 videoflags;
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/* Initialize SDL */
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if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
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fprintf(stderr, "Couldn't initialize SDL: %s\n",SDL_GetError());
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exit(1);
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}
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atexit(SDL_Quit);
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videoflags = SDL_SWSURFACE;
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while( argc > 1 ) {
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--argc;
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if ( argv[argc] && !strcmp(argv[argc], "-fullscreen") ) {
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videoflags |= SDL_FULLSCREEN;
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} else {
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fprintf(stderr, "Usage: %s [-fullscreen]\n", argv[0]);
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exit(1);
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}
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}
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/* Set 640x480 video mode */
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if ( SDL_SetVideoMode(640, 480, 0, videoflags) == NULL ) {
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fprintf(stderr, "Couldn't set 640x480 video mode: %s\n",
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SDL_GetError());
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exit(2);
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}
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/* Enable UNICODE translation for keyboard input */
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SDL_EnableUNICODE(1);
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/* Enable auto repeat for keyboard input */
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SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY,
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SDL_DEFAULT_REPEAT_INTERVAL);
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/* Watch keystrokes */
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done = 0;
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while ( !done ) {
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/* Check for events */
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SDL_WaitEvent(&event);
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switch (event.type) {
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case SDL_KEYDOWN:
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PrintKey(&event.key.keysym, 1);
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break;
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case SDL_KEYUP:
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PrintKey(&event.key.keysym, 0);
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break;
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case SDL_MOUSEBUTTONDOWN:
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/* Any button press quits the app... */
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case SDL_QUIT:
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done = 1;
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break;
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default:
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break;
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}
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}
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return(0);
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}
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