LO27/LibGui/gui.c

/*
 * This is a gui for the cellular automaton library
 *
 * Copyright (C) 2016-2017 Antoine BARTUCCIO, Jean POREE DE RIDDER
 *
 * Licensed under the MIT License,(the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * hhttps://opensource.org/licenses/MIT
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <SDL2/SDL.h>
#include <gui.h>
#include <matrix.h>
#include <CellElement.h>
#include <termios.h>
#include <unistd.h>

void setPixel(SDL_Renderer *renderer, int x, int y, bool value){

	if (value){
		SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
	} else {
		SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
	}
	SDL_RenderDrawPoint(renderer, x, y);
}

void displayMatrixSDL(SCREEN *screen, Matrix m){
	int i;
	int j;

	SDL_SetRenderDrawColor(screen->renderer, 0, 0, 0, 0);
	SDL_RenderClear(screen->renderer);

	for (i=0;i<m.rowCount;i++){
		for (j=0;j<m.colCount;j++){
			setPixel(screen->renderer, i, j, getCellValue(m, j, i));
		}
	}
	SDL_RenderPresent(screen->renderer);
}

void waitUntilEnter(SCREEN * screen){
	int keypress = 0;

	while (!keypress){
		while(SDL_PollEvent(&screen->event)){
			switch (screen->event.type){
				case SDL_QUIT:
					keypress = 1;
					break;
				case SDL_KEYDOWN:
					switch(screen->event.key.keysym.sym){
						case SDLK_RETURN:
							keypress = 1;
							break;
					}
			}
		}
	}
}

int newWindowFromMatrix(Matrix m){
	SCREEN screen;

	screen.WIDTH = m.colCount;
	screen.HEIGHT = m.rowCount;

	if (SDL_Init(SDL_INIT_VIDEO) < 0){
		SDL_Quit();
		return 1;
	}

	SDL_CreateWindowAndRenderer(screen.WIDTH, screen.HEIGHT,
			                    SDL_WINDOW_RESIZABLE | SDL_WINDOW_INPUT_FOCUS | SDL_WINDOW_SHOWN,
			                    &(screen.window), &(screen.renderer));

	if (screen.window == NULL || screen.renderer == NULL){
		SDL_Quit();
		return 1;
	}

	displayMatrixSDL(&screen, m);

	waitUntilEnter(&screen);

	SDL_DestroyRenderer(screen.renderer);
	SDL_DestroyWindow(screen.window);

	SDL_Quit();

	return 0;
}

bool inputYesOrNo(char message[]){
	char response;

	printf("%s (Y/n)\n", message);
	response = getchar();
	clearBuffer();

	if (response == 'n'){
		return false;
	} else {
		return true;
	}

}

void clearBuffer(){
	char c;
	while ((c = getchar()) != '\n' && c != EOF) { }
}

void displayMatrixGUI(Matrix m, bool useSDL){
	if (useSDL){
		printf("Press ENTER or the red cross to exit the window and continue.\n");
		newWindowFromMatrix(m);
	} else {
		printMatrix(m);
	}
}

int safeNumberInput(int min, int max){
	char str[30];
	int input;

	fgets(str, 29, stdin);
	clearBuffer();

	input = atoi(str);

	while (input < min || input > max){
		printf("The number should be between %d and %d\n", min, max);
		fgets(str, 29, stdin);
		clearBuffer();
		input = atoi(str);
	}

	return input;
}