package abc;

import java.awt.BorderLayout;
import java.awt.Dimension;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSplitPane;
import javax.swing.SwingUtilities;

import com.jogamp.newt.awt.NewtCanvasAWT;
import com.jogamp.newt.opengl.GLWindow;
import com.jogamp.opengl.GL;
import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLCapabilities;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.GLProfile;

public class Main {

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            MainWindow w = new MainWindow();
            w.setPreferredSize(new Dimension(640, 480));
            w.pack();
            w.setVisible(true);
        });
    }

    private static class MainWindow extends JFrame {
        private static final long serialVersionUID = -1;

        MainWindow() {
            GLProfile profile = GLProfile.getDefault();
            GLCapabilities caps = new GLCapabilities(profile);

            GLWindow glWindow = GLWindow.create(caps);
            glWindow.addGLEventListener(new MainGLEventListener());

            NewtCanvasAWT canvas = new NewtCanvasAWT(glWindow);

            JPanel canvasPanel = new JPanel(new BorderLayout());
            canvasPanel.setMinimumSize(new Dimension(1, 1));
            canvasPanel.add(canvas);

            JSplitPane pane = new JSplitPane(JSplitPane.VERTICAL_SPLIT);
            pane.setBottomComponent(new JButton("Button"));
            pane.setTopComponent(canvasPanel);

            getContentPane().add(pane);
        }

        private class MainGLEventListener implements GLEventListener {
            private double time;

            public void init(GLAutoDrawable drawable) {
            }

            public void dispose(GLAutoDrawable drawable) {
            }

            public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h) {
            }

            public void display(GLAutoDrawable drawable) {
                GL gl = drawable.getGL();
                float r = (float) Math.abs(Math.sin(time));
                float g = (float) Math.abs(Math.sin(time + 0.3));
                float b = (float) Math.abs(Math.sin(time + 0.6));
                gl.glClearColor(0, 0.3f, 0.6f, 1);
                gl.glClear(GL.GL_COLOR_BUFFER_BIT);
                time += 0.01;
            }
        }
    }

}