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import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import gl4java.*;
import gl4java.awt.*;
public class SharedGLTest2 extends Applet
implements MouseListener
{
MyCanvas canvas = null;
Button addButton = null;
int canvasNumber = 0;
Panel pAllCvs = null;
Dimension d = null;
public void init()
{
d = getSize();
setLayout(new BorderLayout());
addButton = new Button ("add gl");
addButton.addMouseListener(this);
add("South", addButton);
pAllCvs = new Panel();
pAllCvs.setLayout(new GridLayout(4,1));
add("Center", pAllCvs);
canvas = new MyCanvas (d.width/2, d.height/2, null);
pAllCvs.add(canvas);
canvasNumber=1;
}
public static void main( String args[] )
{
Frame mainFrame = new Frame("SharedGLTest2");
SharedGLTest2 applet = new SharedGLTest2();
applet.setSize(400, 400);
applet.init();
applet.start();
mainFrame.add(applet);
mainFrame.pack();
mainFrame.setVisible(true);
}
public void start()
{
}
public void stop()
{
}
// Methods required for the implementation of MouseListener
public void mouseEntered( MouseEvent evt )
{
}
public void mouseExited( MouseEvent evt )
{
}
public void mousePressed( MouseEvent evt )
{
}
public void mouseReleased( MouseEvent evt )
{
}
public void mouseClicked( MouseEvent evt )
{
Component comp = evt.getComponent();
if( canvas!=null && comp.equals(addButton) )
{
if(canvasNumber<4)
{
MyCanvas _canvas =
new MyCanvas (d.width/2,d.height/2,canvas.getGLContext());
pAllCvs.add(_canvas);
canvasNumber++;
pAllCvs.invalidate();
pAllCvs.validate();
if(canvasNumber==4)
addButton.setEnabled(false);
}
}
}
private static int callList=0;
protected class MyCanvas extends GLCanvas
{
public MyCanvas(int w, int h, GLContext shareWith)
{
super(w, h);
sharedGLContext = shareWith;
}
public void init()
{
if(sharedGLContext==null && callList==0)
{
buildCallList(); // Really build something only once.
}
}
public void display()
{
if( glj.gljMakeCurrent() == false ) {
System.out.println("problem in use() method");
return;
}
if(callList!=0)
gl.glCallList(callList);
glj.gljSwap();
glj.gljCheckGL();
glj.gljFree();
}
/**
* Build only one call list for both GLCanvas.
*/
protected void buildCallList()
{
callList = gl.glGenLists(1);
gl.glNewList(callList, gl.GL_COMPILE);
gl.glClearColor(1f, 0f, 0f, 1f);
gl.glClear(gl.GL_COLOR_BUFFER_BIT); // Clear the GLCanvas with red.
gl.glEndList();
}
}
}
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