README.md

CBCHAIN (Callback Chain for LWJGL3)

Chain callbacks for LWJGL3

ABOUT

Cahin callback is callback that keep another callbacks and invoke them sequently when receives event.

How to add

Add repository

Maven

<repositories>
    <repository>
      <id>SpinyOwl-releases</id>
      <url>https://raw.githubusercontent.com/SpinyOwl/repo/releases</url>
      <releases><enabled>true</enabled></releases>
      <snapshots><enabled>false</enabled></snapshots>
    </repository>
</repositories>

Gradle

repositories {
    maven { url "https://raw.githubusercontent.com/SpinyOwl/repo/releases" }
}

Add dependency

Maven

<!-- CBCHAIN - RELEASE - https://github.com/SpinyOwl/cbchain -->
<dependencies>
    <dependency>
       <groupId>org.liquidengine</groupId>
        <artifactId>cbchain</artifactId>
        <version>1.0.0</version>
    </dependency>
</dependencies>

Gradle

// CBCHAIN - RELEASE - https://github.com/SpinyOwl/cbchain
compile group: 'org.liquidengine', name: 'cbchain', version: '1.0.0';

Usage example

---

package org.liquidengine.cbchain.example;

import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWKeyCallbackI;
import ChainKeyCallback;
import org.lwjgl.opengl.GL;
import org.lwjgl.opengl.GL11;

import static org.lwjgl.system.MemoryUtil.NULL;

public class Example {
    
    public static void main(String[] args) {
        // Create chain key callback
        ChainKeyCallback glfwChainKeyCallback = new ChainKeyCallback();
        
        // Create some callback - for example escape button callback - to exit from app 
        GLFWKeyCallbackI escapeCallback = (long window, int key, int scancode, int action, int mods) -> {
            if (key == GLFW.GLFW_KEY_ESCAPE && action != GLFW.GLFW_RELEASE) {
                GLFW.glfwSetWindowShouldClose(window, true);
            }
        };
        
        // Create another callback that will print pressed key and action
        GLFWKeyCallbackI printKeyCallback = (long window, int key, int scancode, int action, int mods) -> {
            System.out.println("key: " + key + "; action: " + action);
        };
        
        // Add callbacks to chain callback
        glfwChainKeyCallback.add(escapeCallback);
        glfwChainKeyCallback.add(printKeyCallback);
        
        // Initialize glfw
        if (!GLFW.glfwInit()) {
            throw new IllegalStateException("Can't initialize GLFW");
        }
        // Create window
        long window = GLFW.glfwCreateWindow(600, 400, "Example", NULL, NULL);

        GLFW.glfwMakeContextCurrent(window);
        GL.createCapabilities();
        GL11.glClearColor(1, 1, 1, 1);

        // Bind chain key callback to window
        GLFW.glfwSetKeyCallback(window, glfwChainKeyCallback);
        
        while (!GLFW.glfwWindowShouldClose(window)) {
            GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);

            GLFW.glfwSwapBuffers(window);
            GLFW.glfwPollEvents();
        }

        GLFW.glfwDestroyWindow(window);
        GLFW.glfwTerminate();
    }

}

Links

LWJGL - Lightweight Java Game Library 3