From 585e558afb23acc87d3ad71b2fef974281a185dd Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 10 Dec 2016 12:20:12 +0100
Subject: Extract painting and display age of world

---
 life.cc     | 41 ++++++++++++++++++++++++++++++++++++++++-
 src/world.h | 42 ++++++++++++++----------------------------
 2 files changed, 54 insertions(+), 29 deletions(-)

diff --git a/life.cc b/life.cc
index 7f0ace7..6d98a08 100644
--- a/life.cc
+++ b/life.cc
@@ -2,13 +2,52 @@
 
 #include "world.h"
 
+void print_tb(
+	std::size_t   x,
+	std::size_t   y,
+	std::uint16_t fg,
+	std::uint16_t bg,
+	const std::string& text
+) {
+	for ( const char& c : text ) {
+		tb_change_cell(x, y, c, fg, bg);
+		x++;
+	}
+}
+
+template<
+	std::size_t WIDTH,
+	std::size_t HEIGHT
+>
+void draw(life::World<WIDTH, HEIGHT>& world) {
+	tb_clear();
+
+	for ( std::size_t i = 0; i < HEIGHT; i++ ) {
+		for ( std::size_t j = 0; j < WIDTH; j++ ) {
+			if ( world.isLifeAt(i,j) ) {
+				tb_change_cell(i, j, 0x2588, TB_BLACK, TB_GREEN);
+			} else {
+				tb_change_cell(i, j, 0x2591, TB_BLACK, TB_BLUE);
+			}
+		}
+	}
+
+	print_tb(1, 21, TB_WHITE, TB_DEFAULT, "Age:");
+	print_tb(6, 21, TB_WHITE, TB_DEFAULT, std::to_string(world.getAge()));
+
+	tb_present();
+}
+
 int main(int, char*[]) {
 	tb_init();
 
+	tb_select_output_mode(TB_OUTPUT_NORMAL);
 	tb_select_input_mode(TB_INPUT_ESC | TB_INPUT_MOUSE);	
 
 	life::World<20,20> world;
 
+	draw(world);
+
 	while ( true ) {
 		struct tb_event ev;
 		int t = tb_poll_event(&ev);
@@ -39,7 +78,7 @@ int main(int, char*[]) {
 				break;
 		}
 
-		world.draw();
+		draw(world);
 	}
 
 	return 0;
diff --git a/src/world.h b/src/world.h
index 297d0c5..d951cf5 100644
--- a/src/world.h
+++ b/src/world.h
@@ -6,8 +6,6 @@
 #include <tuple>
 #include <cstdint>
 
-#include <termbox.h>
-
 namespace life {
 
 template<
@@ -24,15 +22,7 @@ class World {
 			}
 		}
 
-		void summonLifeAt(std::size_t x, std::size_t y) {
-			this->matrix_[y][x] = true;
-		}
-
-		void extinguishLifeAt(std::size_t x, std::size_t y) {
-			this->matrix_[y][x] = false;
-		}
-
-		bool isLifeAt(std::ptrdiff_t x, std::ptrdiff_t y) {
+		bool isLifeAt(std::ptrdiff_t x, std::ptrdiff_t y) const {
 			if ( x >= 0      &&
 			     x <  WIDTH  &&
 			     y >= 0      &&
@@ -43,7 +33,7 @@ class World {
 			}
 		}
 
-		std::uint8_t lifeDensityAt(std::size_t x, std::size_t y) {
+		std::uint8_t lifeDensityAt(std::size_t x, std::size_t y) const {
 			std::uint8_t counter = 0;
 
 			if ( this->isLifeAt(x - 1, y) ) {
@@ -74,6 +64,18 @@ class World {
 			return counter;
 		}
 
+		std::size_t getAge() const {
+			return this->age_;
+		}
+
+		void summonLifeAt(std::size_t x, std::size_t y) {
+			this->matrix_[y][x] = true;
+		}
+
+		void extinguishLifeAt(std::size_t x, std::size_t y) {
+			this->matrix_[y][x] = false;
+		}
+
 		void tick() {
 			this->age_++;
 
@@ -118,22 +120,6 @@ class World {
 			}
 		}
 
-		void draw() {
-			tb_clear();
-
-			for ( std::size_t j = 0; j < HEIGHT; j++ ) {
-				for ( std::size_t i = 0; i < WIDTH; i++ ) {
-					if ( this->matrix_[j][i] ) {
-						tb_change_cell(i, j, 0x2588, TB_BLACK, TB_GREEN);
-					} else {
-						tb_change_cell(i, j, 0x2591, TB_BLACK, TB_BLUE);
-					}
-				}
-			}
-
-			tb_present();
-		}
-
 	private:
 		std::size_t age_ = 0;
 
-- 
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