Added Mouse/Keyboard classes

src/main/java/org/hirw/game/Keyboard.java

@@ -0,0 +1,37 @@
+package org.hirw.game;
+
+import static org.lwjgl.glfw.GLFW.*;
+
+import java.util.HashMap;
+
+public class Keyboard {
+  private static Keyboard instance;
+  private HashMap<Integer, Boolean> buttons;
+
+  private Keyboard() {
+    this.buttons = new HashMap<Integer, Boolean>();
+  }
+
+  public static Keyboard getInstance() {
+    if (instance == null) {
+      synchronized (Keyboard.class) {
+        if (instance == null) {
+          instance = new Keyboard();
+        }
+      }
+    }
+    return instance;
+  }
+
+  public static void keyCallback(long window, int keyCode, int _scan, int action, int _modifiers) {
+    if (action == GLFW_PRESS) {
+      getInstance().buttons.put(keyCode, true);
+    } else if (action == GLFW_RELEASE) {
+      getInstance().buttons.put(keyCode, false);
+    }
+  }
+
+  public static boolean isPressed(int keyCode) {
+    return getInstance().buttons.getOrDefault(keyCode, false);
+  }
+}

src/main/java/org/hirw/game/Mouse.java

@@ -0,0 +1,67 @@
+package org.hirw.game;
+
+import static org.lwjgl.glfw.GLFW.*;
+
+import java.util.HashMap;
+
+public class Mouse {
+  private double x, y, oldX, oldY;
+  private HashMap<Integer, Boolean> buttons;
+
+  private static Mouse instance;
+
+  public interface Buttons {
+    public final int LEFT = GLFW_MOUSE_BUTTON_LEFT;
+    public final int RIGHT = GLFW_MOUSE_BUTTON_RIGHT;
+  }
+
+  private Mouse() {
+    this.buttons = new HashMap<Integer, Boolean>();
+  }
+
+  public static Mouse getInstance() {
+    if (instance == null) {
+      synchronized (Mouse.class) { // Double checked locking
+        if (instance == null) {
+          instance = new Mouse();
+        }
+      }
+    }
+    return instance;
+  }
+
+  public static void cursorPositionCallback(long window, double newX, double newY) {
+    getInstance().oldX = getInstance().x;
+    getInstance().oldY = getInstance().y;
+    getInstance().x = newX;
+    getInstance().y = newY;
+  }
+
+  public static void mouseButtonCallback(long window, int keyCode, int action, int _modifiers) {
+    if (action == GLFW_PRESS) {
+      getInstance().buttons.put(keyCode, true);
+    } else if (action == GLFW_RELEASE) {
+      getInstance().buttons.put(keyCode, false);
+    }
+  }
+
+  public static double getX() {
+    return getInstance().x;
+  }
+
+  public static double getY() {
+    return getInstance().y;
+  }
+
+  public static double getDeltaX() {
+    return getInstance().oldX - getInstance().x;
+  }
+
+  public static double getDeltaY() {
+    return getInstance().oldY - getInstance().y;
+  }
+
+  public static boolean isPressed(int keyCode) {
+    return getInstance().buttons.getOrDefault(keyCode, false);
+  }
+}

src/main/java/org/hirw/game/Window.java

@@ -31,7 +31,6 @@ public class Window {
   }
 
   public void blastOff() {
-    logVersion();
     setup();
     loop();
     cleanUp();
@@ -42,6 +41,8 @@ public class Window {
   }
 
   private void setup() {
+    logVersion();
+
     GLFWErrorCallback.createPrint(System.err).set();
     if (!glfwInit()) throw new IllegalStateException("Unable to initialize GLFW");
 
@@ -66,18 +67,26 @@ public class Window {
     //   GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
     // }
 
+    glfwSetCursorPosCallback(glfwWindow, Mouse::cursorPositionCallback);
+    glfwSetMouseButtonCallback(glfwWindow, Mouse::mouseButtonCallback);
+    glfwSetKeyCallback(glfwWindow, Keyboard::keyCallback);
+
     glfwSetWindowTitle(glfwWindow, this.title);
     glfwMakeContextCurrent(glfwWindow);
     glfwSwapInterval(1);
     glfwShowWindow(glfwWindow);
+
     GL.createCapabilities();
+    glClearColor(1.0f, 0.0f, 2.0f, 0.0f);
   }
 
   private void loop() {
-    // GL.createCapabilities(); // Does this maybe go in here?
-    glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
-
     while (!glfwWindowShouldClose(glfwWindow)) {
+
+      if (Mouse.isPressed(Mouse.Buttons.LEFT)) {
+        System.out.println("LEFT CLICKED");
+      }
+
       glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
       glfwSwapBuffers(glfwWindow);
       glfwPollEvents();