mirror of
https://github.com/Ryujinx/SDL.git
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192 lines
5 KiB
C
192 lines
5 KiB
C
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/*
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Copyright (C) 1997-2013 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.
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*/
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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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/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
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static void
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quit(int rc)
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{
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SDL_Quit();
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exit(rc);
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}
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static void
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print_string(char **text, size_t *maxlen, const char *fmt, ...)
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{
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int len;
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va_list ap;
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va_start(ap, fmt);
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len = SDL_vsnprintf(*text, *maxlen, fmt, ap);
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if (len > 0) {
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*text += len;
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if ( ((size_t) len) < *maxlen ) {
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*maxlen -= (size_t) len;
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} else {
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*maxlen = 0;
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}
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}
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va_end(ap);
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}
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static void
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print_modifiers(char **text, size_t *maxlen)
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{
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int mod;
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print_string(text, maxlen, " modifiers:");
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mod = SDL_GetModState();
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if (!mod) {
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print_string(text, maxlen, " (none)");
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return;
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}
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if (mod & KMOD_LSHIFT)
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print_string(text, maxlen, " LSHIFT");
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if (mod & KMOD_RSHIFT)
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print_string(text, maxlen, " RSHIFT");
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if (mod & KMOD_LCTRL)
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print_string(text, maxlen, " LCTRL");
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if (mod & KMOD_RCTRL)
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print_string(text, maxlen, " RCTRL");
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if (mod & KMOD_LALT)
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print_string(text, maxlen, " LALT");
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if (mod & KMOD_RALT)
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print_string(text, maxlen, " RALT");
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if (mod & KMOD_LGUI)
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print_string(text, maxlen, " LGUI");
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if (mod & KMOD_RGUI)
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print_string(text, maxlen, " RGUI");
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if (mod & KMOD_NUM)
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print_string(text, maxlen, " NUM");
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if (mod & KMOD_CAPS)
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print_string(text, maxlen, " CAPS");
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if (mod & KMOD_MODE)
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print_string(text, maxlen, " MODE");
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}
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static void
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PrintKey(SDL_Keysym * sym, SDL_bool pressed, SDL_bool repeat)
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{
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char message[512];
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char *spot;
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size_t left;
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spot = message;
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left = sizeof(message);
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/* Print the keycode, name and state */
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if (sym->sym) {
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print_string(&spot, &left,
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"Key %s: scancode %d = %s, keycode 0x%08X = %s ",
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pressed ? "pressed " : "released",
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sym->scancode,
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SDL_GetScancodeName(sym->scancode),
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sym->sym, SDL_GetKeyName(sym->sym));
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} else {
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print_string(&spot, &left,
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"Unknown Key (scancode %d = %s) %s ",
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sym->scancode,
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SDL_GetScancodeName(sym->scancode),
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pressed ? "pressed " : "released");
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}
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print_modifiers(&spot, &left);
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if (repeat) {
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print_string(&spot, &left, " (repeat)");
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}
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SDL_Log("%s\n", message);
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}
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static void
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PrintText(char *text)
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{
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char *spot, expanded[1024];
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expanded[0] = '\0';
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for ( spot = text; *spot; ++spot )
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{
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size_t length = SDL_strlen(expanded);
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SDL_snprintf(expanded + length, sizeof(expanded) - length, "\\x%.2x", (unsigned char)*spot);
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}
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SDL_Log("Text (%s): \"%s%s\"\n", expanded, *text == '"' ? "\\" : "", text);
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}
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int
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main(int argc, char *argv[])
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{
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SDL_Window *window;
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SDL_Event event;
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int done;
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/* Enable standard application logging */
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SDL_LogSetPriority(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO);
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/* Initialize SDL */
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if (SDL_Init(SDL_INIT_VIDEO) < 0) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't initialize SDL: %s\n", SDL_GetError());
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return (1);
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}
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/* Set 640x480 video mode */
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window = SDL_CreateWindow("CheckKeys Test",
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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640, 480, 0);
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if (!window) {
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SDL_LogError(SDL_LOG_CATEGORY_APPLICATION, "Couldn't create 640x480 window: %s\n",
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SDL_GetError());
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quit(2);
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}
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#if __IPHONEOS__
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/* Creating the context creates the view, which we need to show keyboard */
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SDL_GL_CreateContext(window);
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#endif
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SDL_StartTextInput();
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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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case SDL_KEYUP:
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PrintKey(&event.key.keysym, (event.key.state == SDL_PRESSED) ? SDL_TRUE : SDL_FALSE, (event.key.repeat) ? SDL_TRUE : SDL_FALSE);
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break;
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case SDL_TEXTINPUT:
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PrintText(event.text.text);
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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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SDL_Quit();
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return (0);
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}
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/* vi: set ts=4 sw=4 expandtab: */
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