package demo;

import com.jogamp.opengl.GL;
import com.jogamp.opengl.GL2;

/*
 * To change this license header, choose License Headers in Project Properties.
 * To change this template file, choose Tools | Templates
 * and open the template in the editor.
 * https://www.programcreek.com/java-api-examples/?api=com.jogamp.opengl.awt.GLCanvas
 */

import com.jogamp.opengl.GLAutoDrawable;
import com.jogamp.opengl.GLEventListener;
import com.jogamp.opengl.GLProfile;
import com.jogamp.opengl.GLCapabilities;
import com.jogamp.opengl.awt.GLCanvas;
import javax.swing.JFrame;

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.GraphicsConfiguration;
import java.awt.GraphicsEnvironment;
import java.awt.Rectangle;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.AffineTransform;

/**
 * A minimal program that draws with JOGL in a Swing JFrame using the AWT GLCanvas.
 *
 * @author Wade Walker
 */
public class OneTriangleSwingGLCanvas {

	public static void main( String [] args ) {

        GLProfile glprofile = GLProfile.getDefault();
        GLCapabilities glcapabilities = new GLCapabilities( glprofile );
        final GLCanvas glcanvas = new GLCanvas( glcapabilities );
        
        glcanvas.addGLEventListener( new GLEventListener() {
            
            @Override
            public void reshape( GLAutoDrawable glautodrawable, int x, int y, int width, int height ) {
                OneTriangle.setup( glautodrawable.getGL().getGL2(), width, height );
                System.out.printf("reshape canvas %d x %d\n", width, height);
            }
            
            @Override
            public void init( GLAutoDrawable glautodrawable ) {
            }
            
            @Override
            public void dispose( GLAutoDrawable glautodrawable ) {
            }
            
            @Override
            public void display( GLAutoDrawable glautodrawable ) {
            	glautodrawable.getGL().getGL2().glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
                OneTriangle.render( glautodrawable.getGL().getGL2(), glautodrawable.getSurfaceWidth(), glautodrawable.getSurfaceHeight() );
                
                Rectangle bnds = glcanvas.getBounds();
                GL2 gl = glautodrawable.getGL().getGL2();
                gl.glColor3f( 0.0f, 0.0f, 1.0f );
                gl.glLineWidth(3.0f);
                gl.glBegin( GL.GL_LINE_STRIP );
                gl.glVertex2i( bnds.x, bnds.y ); 
                gl.glVertex2i( bnds.x + bnds.width - 1, bnds.y );
                gl.glVertex2i( bnds.x + bnds.width - 1, bnds.y + bnds.height - 1);
                gl.glVertex2i( bnds.x, bnds.y + bnds.height - 1 );
                gl.glVertex2i( bnds.x, bnds.y );
                gl.glEnd();
                System.out.printf("display %d x %d\n", bnds.width, bnds.height);
            }
        });

		final JFrame jframe = new JFrame( "One Triangle Swing GLCanvas" );
        jframe.addWindowListener( new WindowAdapter() {
            public void windowClosing( WindowEvent windowevent ) {
                jframe.dispose();
                System.exit( 0 );
            }
        });

        jframe.getContentPane().add( glcanvas, BorderLayout.CENTER );
        jframe.setSize( 640, 480 );
        jframe.setVisible( true );
    }
}