refactor: extract Window into class

.editorconfig

@@ -8,7 +8,7 @@ indent_style = space
 insert_final_newline = true
 trim_trailing_whitespace = true
 
-[*.{gradle,java}]
+[*.{gradle, java}]
 indent_size = 4
 
 [*.md]

src/main/java/com/github/incognitojam/redpacket/RedPacket.java

@@ -1,31 +1,23 @@
 package com.github.incognitojam.redpacket;
 
+import com.github.incognitojam.redpacket.engine.Window;
 import org.lwjgl.*;
 import org.lwjgl.glfw.*;
 import org.lwjgl.opengl.*;
-import org.lwjgl.system.*;
 
-import java.nio.*;
-
-import static org.lwjgl.glfw.Callbacks.*;
 import static org.lwjgl.glfw.GLFW.*;
 import static org.lwjgl.opengl.GL11.*;
-import static org.lwjgl.system.MemoryStack.*;
-import static org.lwjgl.system.MemoryUtil.*;
 
 public class RedPacket {
-    // Window handle
-    private long window;
+    private Window window;
 
     public void run() {
         System.out.println("Hello LWJGL " + Version.getVersion() + "!");
 
         init();
         loop();
 
-        // Free the window callbacks and destroy the window
-        glfwFreeCallbacks(window);
-        glfwDestroyWindow(window);
+        window.destroy();
 
         // Terminate GLFW and free the error callback
         glfwTerminate();
@@ -41,48 +33,7 @@ private void init() {
         if (!glfwInit())
             throw new IllegalStateException("Unable to initialize GLFW");
 
-        // Configure GLFW
-        glfwDefaultWindowHints(); // optional, the current window hints are already the default
-        glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE); // the window will stay hidden after creation
-        glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE); // the window will be resizable
-
-        // Create the window
-        window = glfwCreateWindow(300, 300, "Hello World!", NULL, NULL);
-        if (window == NULL)
-            throw new RuntimeException("Failed to create the GLFW window");
-
-        // Setup a key callback. It will be called every time a key is pressed, repeated or released.
-        glfwSetKeyCallback(window, (window, key, scancode, action, mods) -> {
-            if (key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE)
-                glfwSetWindowShouldClose(window, true); // We will detect this in the rendering loop
-        });
-
-        // Get the thread stack and push a new frame
-        try (MemoryStack stack = stackPush()) {
-            IntBuffer pWidth = stack.mallocInt(1); // int*
-            IntBuffer pHeight = stack.mallocInt(1); // int*
-
-            // Get the window size passed to glfwCreateWindow
-            glfwGetWindowSize(window, pWidth, pHeight);
-
-            // Get the resolution of the primary monitor
-            GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
-
-            // Center the window
-            glfwSetWindowPos(
-                window,
-                (vidmode.width() - pWidth.get(0)) / 2,
-                (vidmode.height() - pHeight.get(0)) / 2
-            );
-        } // the stack frame is popped automatically
-
-        // Make the OpenGL context current
-        glfwMakeContextCurrent(window);
-        // Enable v-sync
-        glfwSwapInterval(1);
-
-        // Make the window visible
-        glfwShowWindow(window);
+        window = new Window("Red Packet", 300, 300);
     }
 
     private void loop() {
@@ -98,10 +49,12 @@ private void loop() {
 
         // Run the rendering loop until the user has attempted to close
         // the window or has pressed the ESCAPE key.
-        while (!glfwWindowShouldClose(window)) {
-            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear the framebuffer
+        while (!window.shouldClose()) {
+            // clear the framebuffer
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
-            glfwSwapBuffers(window); // swap the color buffers
+            // swap the color buffers
+            window.update();
 
             // Poll for window events. The key callback above will only be
             // invoked during this call.

src/main/java/com/github/incognitojam/redpacket/engine/Window.java

@@ -0,0 +1,120 @@
+package com.github.incognitojam.redpacket.engine;
+
+import org.lwjgl.glfw.GLFWVidMode;
+import org.lwjgl.system.MemoryStack;
+
+import java.nio.IntBuffer;
+
+import static org.lwjgl.glfw.Callbacks.glfwFreeCallbacks;
+import static org.lwjgl.glfw.GLFW.*;
+import static org.lwjgl.system.MemoryStack.stackPush;
+import static org.lwjgl.system.MemoryUtil.NULL;
+
+public class Window {
+    private String title;
+    private int width;
+    private int height;
+    private final long handle;
+
+    public Window(String title, int width, int height) {
+        this.title = title;
+        this.width = width;
+        this.height = height;
+
+        // Configure GLFW
+        glfwDefaultWindowHints(); // optional, the current window hints are already the default
+        glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE); // the window will stay hidden after creation
+        glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE); // the window will be resizable
+
+        // Create the window
+        handle = glfwCreateWindow(width, height, title, NULL, NULL);
+        if (handle == NULL)
+            throw new RuntimeException("Failed to create the GLFW window");
+
+        // Setup a key callback. It will be called every time a key is pressed, repeated or released.
+        glfwSetKeyCallback(handle, (window, key, scancode, action, mods) -> {
+            if (key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE)
+                glfwSetWindowShouldClose(window, true); // We will detect this in the rendering loop
+        });
+
+        // Setup a window size callback. It will be called every time the window is resized.
+        glfwSetWindowSizeCallback(handle, (window, w, h) -> {
+            this.width = w;
+            this.height = h;
+        });
+
+        // Get the thread stack and push a new frame
+        try (MemoryStack stack = stackPush()) {
+            IntBuffer pWidth = stack.mallocInt(1); // int*
+            IntBuffer pHeight = stack.mallocInt(1); // int*
+
+            // Get the window size passed to glfwCreateWindow
+            glfwGetWindowSize(handle, pWidth, pHeight);
+
+            // Get the resolution of the primary monitor
+            GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
+
+            // Center the window
+            glfwSetWindowPos(
+                handle,
+                (vidmode.width() - pWidth.get(0)) / 2,
+                (vidmode.height() - pHeight.get(0)) / 2
+            );
+        } // the stack frame is popped automatically
+
+        // Make the OpenGL context current
+        glfwMakeContextCurrent(handle);
+        // Enable v-sync
+        // TODO: add argument to disable
+        glfwSwapInterval(1);
+
+        // Make the window visible
+        glfwShowWindow(handle);
+    }
+
+    public void destroy() {
+        // Free the window callbacks and destroy the window
+        glfwFreeCallbacks(handle);
+        glfwDestroyWindow(handle);
+    }
+
+    public boolean isKeyPressed(int keyCode) {
+        return glfwGetKey(handle, keyCode) == GLFW_PRESS;
+    }
+
+    public boolean shouldClose() {
+        return glfwWindowShouldClose(handle);
+    }
+
+    public void update() {
+        glfwSwapBuffers(handle);
+        glfwPollEvents();
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+        glfwSetWindowTitle(handle, title);
+    }
+
+    public int getWidth() {
+        return width;
+    }
+
+    public void setWidth(int width) {
+        this.width = width;
+        glfwSetWindowSize(handle, width, height);
+    }
+
+    public int getHeight() {
+        return height;
+    }
+
+    public void setHeight(int height) {
+        this.height = height;
+        glfwSetWindowSize(handle, width, height);
+    }
+}