Now you can move the square around with the keyboard.

README.md

@@ -32,6 +32,12 @@ To get this working the rough (ROUGH) steps on Windows are:
 
 I'll have more extensive instructions in a later blog post, but if you have time try this out and let me know how it went at help@learncodethehardway.com.  Please let me know if you tried a different compiler, Windows version, etc.  If you're on OSX or Linux it should work the same but Linux people might want to use their package manager instead.
 
+### "Keyboard without any keys"
+
+If you get a weird error message of, "We got a keyboard without any keys" it's because of a security feature in OSX.  Go to `Security settings->Input Monitoring` and select your Terminal. Check it, enter your admin password, then restart your Terminal.  Now you can...read the keyboard in your own software.
+
+No, this does not enhance security at all. These people have gone full on insane at this point.
+
 ## Linux
 
 I actually don't have a Linux computer ready to test, but if you have a brand of Linux you like then try the OSX instructions and email me at [help@learncodethehardway.com](mailto:help@learncodethehardway.com).

sfmldemo/main.cpp

@@ -30,8 +30,6 @@ void ImGui_update(sf::RenderWindow &window, sf::Clock &deltaClock, sf::Time &tic
 
 void Window_update(sf::RenderWindow &window, sf::Shape &shape) {
     window.clear();
-    sf::Vector2u size = window.getSize();
-    shape.setPosition(size.x / 2, size.y / 2);
     window.draw(shape);
     ImGui::SFML::Render(window);
     window.display();
@@ -50,6 +48,8 @@ int main() {
   ImGui_setup(window);
 
   sf::CircleShape shape(100.f, 4);
+  sf::Vector2u size = window.getSize();
+  shape.setPosition(size.x / 2, size.y / 2);
   shape.setOrigin(100.f, 100.f);
   shape.setFillColor(sf::Color(150, 50, 250));
   shape.setOutlineThickness(10.f);
@@ -72,21 +72,39 @@ int main() {
   while (window.isOpen()) {
     sf::Event event;
 
+    // is this a main event loop
     while (window.pollEvent(event)) {
       ImGui::SFML::ProcessEvent(window, event);
 
-      if (event.type == sf::Event::Closed) {
-        fmt::print("Exiting...\n");
-        window.close();
-        thread.terminate();
+      switch(event.type) {
+
+        case sf::Event::Closed:
+          fmt::print("Exiting...\n");
+          window.close();
+          thread.terminate();
+          break;
+        case sf::Event::KeyPressed:
+          if(sf::Keyboard::isKeyPressed(sf::Keyboard::Left)) {
+            shape.move(-20, 0);
+          } else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Right)) {
+            shape.move(20, 0);
+          } else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Up)) {
+            shape.move(0, -20);
+          } else if(sf::Keyboard::isKeyPressed(sf::Keyboard::Down)) {
+            shape.move(0, 20);
+          }
+          break;
       }
     }
 
+
+    // should this move up to the pollEvent loop?
     sf::Time since = clock.getElapsedTime();
     if(since - tick > sf::seconds(1)) {
       tick = since;
     }
 
+
     shape.rotate(1);
 
     ImGui_update(window, deltaClock, tick);