04_showMessage.cpp

/* File: 04_showMessage.cpp
 * Author: Philippe Latu
 * Source: https://github.com/platu/libsensehat-cpp
 *
 * This example program illustrates the senseShowRGBcoloredMessage() function
 * that scrolls a character string on the LED matrix.
 *
 * When the fucntion senseShowMessage() is called with no color specified,
 * the character string is printed with white foreground and black background.
 *
 * Function prototypes:
 *
 * void senseShowMessage(char *);
 *       string to scroll -^
 *
 * void senseShowRGB565ColoredMessage(char *, rgb565_pixel_t, rgb565_pixel_t);
 *                     string to scroll -^  foreground -^   background -^
 *
 * void senseShowRGBColoredMessage(char *, rgb_pixel_t, rgb_pixel_t);
 *                  string to scroll -^ foreground -^ background -^
 *
 * This program asks the user to enter a character string followed by the
 * foreground and background colors. Program ends with the 'q' character.
 */

#include <iostream>
#include <iomanip>
#include <limits>
#include <string>

#include <console_io.h>
#include <sensehat.h>

#define NBCHARS 80

using namespace std;

int main() {
	const rgb_pixel_t black = {.color = {0, 0, 0}};
	const rgb_pixel_t white = {.color = {255, 255, 255}};
	const rgb_pixel_t red = {.color = {255, 0, 0}};
	const rgb_pixel_t orange = {.color = {255, 128, 0}};
	const rgb_pixel_t yellow = {.color = {255, 255, 0}};
	const rgb_pixel_t green = {.color = {0, 255, 0}};
	const rgb_pixel_t cyan = {.color = {0, 255, 255}};
	const rgb_pixel_t blue = {.color = {0, 0, 255}};
	const rgb_pixel_t purple = {.color = {255, 0, 255}};
	const rgb_pixel_t pink = {.color = {255, 128, 128}};

	const rgb_pixel_t c_set[10] = {black, white, red,  orange, yellow,
								   green, cyan,	 blue, purple, pink};
	string msg;
	unsigned int fg, bg;

	if (senseInit()) {
		cout << "-------------------------------" << endl
			 << "Sense Hat initialization Ok." << endl;
		senseClear();

		// Ensure the scroll message is not too long
		msg.resize(NBCHARS);
		cout << "The characater 'q' ends the program." << endl;
		do {
			cout << "First, enter the message to scroll: ";
			getline(cin, msg);
			if (msg != "q") {
				cout << "Second, choose the foreground and background colors"
					 << endl
					 << "according to the following list:" << endl
					 << "1:\tblack" << endl
					 << "2:\twhite" << endl
					 << "3:\tred" << endl
					 << "4:\torange" << endl
					 << "5:\tyellow" << endl
					 << "6:\tgreen" << endl
					 << "7:\tcyan" << endl
					 << "8:\tblue" << endl
					 << "9:\tpurple" << endl
					 << "10:\tpink" << endl
					 << "For instance: 2 1 print the characters white on black."
					 << endl
					 << "Choose 2 colors: ";
				cin >> fg >> bg;
				cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
				senseShowRGBColoredMessage(msg, c_set[fg - 1], c_set[bg - 1]);
			}
		} while (msg != "q");
		cout << endl << "Waiting for keypress." << endl;
		getch();
		senseShutdown();
		cout << "-------------------------------" << endl
			 << "Sense Hat shut down." << endl;
	}

	return EXIT_SUCCESS;
}