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.BorderFactory;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.Border;

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 OneTriangleSwingGLCanvas1 {

	public static void main( String [] args ) {

        GLProfile glprofile = GLProfile.getDefault();
        GLCapabilities glcapabilities = new GLCapabilities( glprofile );
        final GLCanvas glcanvas = new GLCanvas( glcapabilities );
        glcanvas.setSize( 640, 480 );

		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 );
        
        JPanel panel = new JPanel(new BorderLayout()) {
//			@Override
//			public void doLayout() {
//				GraphicsConfiguration graphicsConfiguration = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration();
//				AffineTransform displayTransform = graphicsConfiguration.getDefaultTransform();
//				double scaleX = displayTransform.getScaleX(); // Windows OS Display X scaling.
//				double scaleY = displayTransform.getScaleY(); // Windows OS Display Y scaling.
//				int newWidth = (int) (getWidth() * scaleX);
//				int newHeight = (int) (getHeight() * scaleY);
//				System.out.printf("layout %d x %d; scale %.2f; %d x %d --> %d x %d\n",
//						getWidth(), getHeight(),
//						scaleX, getWidth(), getHeight(), newWidth, newHeight);
//				glcanvas.setBounds(0, 0, newWidth, newHeight);
//				glcanvas.setSize(newWidth, newHeight);
//			}
		};
        Border border = BorderFactory.createLineBorder(Color.BLUE, 5);
        panel.setBorder(border);
        panel.add(glcanvas);
        
        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);
            	int drawWidth = glautodrawable.getSurfaceWidth();
            	int drawHeight = glautodrawable.getSurfaceHeight();
            	OneTriangle.render( glautodrawable.getGL().getGL2(), drawWidth, drawHeight );
            
                GL2 gl = glautodrawable.getGL().getGL2();
                gl.glColor3f( 1.0f, 1.0f, 0.0f );
                gl.glLineWidth(7.0f);
                gl.glBegin( GL.GL_LINE_STRIP );
                gl.glVertex2i( 0, 3 ); 
                gl.glVertex2i( drawWidth-3, 3 );
                gl.glVertex2i( drawWidth-3, drawHeight-3);
                gl.glVertex2i( 3, drawHeight-3);
                gl.glVertex2i( 3, 0 );
                gl.glEnd();

                System.out.printf("display drawable %d x %d\n", drawWidth, drawHeight);
                Rectangle bnds = glcanvas.getBounds();
                System.out.printf("display canvas bnds %d x %d at %d, %d\n", 
                				  bnds.width, bnds.height, bnds.x, bnds.y);
                System.out.printf("display panel %d x %d\n", panel.getWidth(), panel.getHeight());
                System.out.printf("display frame %d x %d\n", jframe.getWidth(), jframe.getHeight());
            }
        });

        jframe.add(panel);
        jframe.pack();
        jframe.setVisible( true );
    }
}