keyboardtest.c

/**
 * Copyright 2015 Andreas Löf
 * 
 * Compilation: gcc -o keyboardtest -lSDL2 keyboardtest.c
 *
 * This program is free software: you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdio.h>
#include <SDL2/SDL.h>

#define WIDTH 800
#define HEIGHT 600

int main (int argc, char *argv[]) {

	// variable declarations
	SDL_Window *win = NULL;
	SDL_Renderer* renderer;
	
	// Initialize SDL.
	if (SDL_Init(SDL_INIT_VIDEO) < 0)
			return 1;

	
	// create the window
	win = SDL_CreateWindow("Keyboard test", 0, 0, WIDTH, HEIGHT, 0);
	renderer = SDL_CreateRenderer(win, -1, 0);

	SDL_SetRenderDrawColor(renderer, 125, 125, 125, 255);
	SDL_RenderClear(renderer);
        SDL_RenderPresent(renderer);

	
	// main loop
	while (1) {
		
		// event handling
		SDL_Event e;
		if ( SDL_PollEvent(&e) ) {
			if (e.type == SDL_QUIT)
				break;
			else if (e.type == SDL_KEYUP && e.key.keysym.sym == SDLK_ESCAPE)
				break;

			if (e.type == SDL_KEYUP)
			  printf("keypress: %d->%s (%s)\n", e.key.keysym.mod,
				 SDL_GetKeyName(e.key.keysym.sym),
				 SDL_GetScancodeName(e.key.keysym.scancode));
		} 

                SDL_UpdateWindowSurface(win);
                SDL_Delay(10);
	}

	SDL_DestroyWindow(win);
	
	return 0;
}