messages disappear automatically after 30s

Project1/draw.cpp

@@ -44,10 +44,16 @@ void draw_messages(struct drawinfo d, std::deque<msg> &message_display_queue) {
 	int linesep = 0; 
 	int i = message_display_queue.size() - 1;
 
+	unsigned int now = SDL_GetTicks();
+
 	int name_margin = 150;
 	for (; i >= 0 && height > 20; i--) {
 		msg m = message_display_queue.at(i);
 
+		if (now - m.received_at > d.max_age) {
+			continue;
+		}
+
 		struct chat_line_shape s = draw_text(d.drawcontext, d.fonts.messages, d.colours.messages, d.drawcontext.width - 20 - name_margin, m.message);
 		height -= s.rect.h + linesep;
 

Project1/draw.h

@@ -30,6 +30,7 @@ struct drawinfo {
 	struct fontpack fonts;
 	struct colourpack colours; 
 	int sock;
+	unsigned int max_age;
 };
 
 

Project1/irc.cpp

@@ -8,6 +8,8 @@
 
 #include "irc.h"
 
+#include <SDL.h> // for SDL_GetTicks();
+
 
 enum class ircommand parse_command(const std::string& command) {
 	if (!command.compare("PRIVMSG")) {
@@ -96,6 +98,7 @@ void parse_chat_messages(const std::string& messages,
 	std::string s;
 	while (std::getline(iss, s)) {
 		auto msg = parse_chat_message(s);
+		msg->received_at = SDL_GetTicks();
 		if (msg) {
 			message_queue.push_back(*msg);
 		}

Project1/main.cpp

@@ -102,11 +102,13 @@ int main(int argc, char *argv[]) {
 		("s,server", "irc server address (irc.chat.twitch.tv)", cxxopts::value<std::string>())
 		("p,port", "irc server port (6667)", cxxopts::value<std::string>())
 		("b,background", "chat background colour (css format)", cxxopts::value<std::string>())
+		("width", "Window width", cxxopts::value<int>())
+		("height", "Window height", cxxopts::value<int>())
+		("m,max-age", "Maximum age of a displayed message", cxxopts::value<int>())
 		("F,foregreound", "text colour (css format)", cxxopts::value<std::string>())
 		("h,help", "Print help")
 	;
 
-
 	auto result = options.parse(argc, argv);
 	if (result.count("help")) {
 		std::cout << options.help() << std::endl;
@@ -138,13 +140,30 @@ int main(int argc, char *argv[]) {
 		maxfps = result["fps"].as<int>();
 	}
 
+	int height = 480;
+	int width = 640;
+
+	if (result.count("width")) {
+		width = result["width"].as<int>();
+	}
+	if (result.count("height")) {
+		height = result["height"].as<int>();
+	}
 
 	drawinfo info {};
-	info.drawcontext = create_window(640, 480, "Twitch chat " + channel);
+	std::string window_title = "Twitch chat " + channel;
+	std::stringstream s {};
+	s << window_title + " " << width << "x" << height;
+	info.max_age = 30000; // messages disappear after 30 seconds
+	info.drawcontext = create_window(width, height, s.str());
 	info.fonts = load_fonts();
 	info.colours.background = { 230, 230, 230, 255 };
 	info.colours.messages = { 255, 255, 255, 255 };
 
+	if (result.count("max-age")) {
+		info.max_age = result["max-age"].as<int>();
+	}
+
 	if (result.count("background")) {
 		auto bg = CSSColorParser::parse(result["background"].as<std::string>());
 		if (bg) {
@@ -180,6 +199,10 @@ int main(int argc, char *argv[]) {
 		if (delay > 0)  SDL_Delay(delay);
 		prev = now;
 
+		if (now % 5000) {
+			new_message = true; // trigger an occasional full redraw
+		}
+
 		auto resp = readresponsenonblock(sock);
 		if (resp) {
 			new_message = true;
@@ -188,6 +211,7 @@ int main(int argc, char *argv[]) {
 		}
 
 		while (SDL_PollEvent(&event)) {
+			std::stringstream s{};
 			switch (event.type) {
 			case SDL_QUIT:
 				return 0;
@@ -200,6 +224,9 @@ int main(int argc, char *argv[]) {
 					case SDL_WINDOWEVENT_SIZE_CHANGED:
 						info.drawcontext.width = event.window.data1;
 						info.drawcontext.height = event.window.data2;
+						s << window_title; 
+						s << " " << info.drawcontext.width << "x" << info.drawcontext.height;
+						SDL_SetWindowTitle(info.drawcontext.win, s.str().c_str());
 						new_message = true; // trigger redraw
 						break;
 					default:

Project1/types.h

@@ -15,4 +15,5 @@ struct msg {
 	std::string message;
 	std::string complete_message;
 	enum class ircommand cmd;
+	unsigned int received_at;
 };