LO27/LibGui/gui.c

/*
* @Author: klmp200
* @Date:   2016-12-27 19:59:21
* @Last Modified by:   klmp200
* @Last Modified time: 2016-12-29 02:51:25
*/

#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 YesOrNo(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 {
		BasicPrintMatrix(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;
}