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/**
* @(#) SimpleGLAnimApplet.java
* @(#) author: Sven Goethel
*/
package gl4java.applet;
/* This program is licensed under the LGPL */
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import java.lang.*;
import gl4java.GLContext;
import gl4java.GLFunc;
import gl4java.GLUFunc;
import gl4java.awt.GLAnimCanvas;
public class SimpleGLAnimApplet1 extends Applet
implements MouseListener, WindowListener, ActionListener, ItemListener
{
public GLAnimCanvas canvas = null;
public Button buttonInfo = null;
public Button buttonFps = null;
public TextField textFps = null;
public Checkbox checkUseRepaint = null;
public Checkbox checkUseFpsSleep = null;
public Button buttonReStart = null;
Frame fInfo = null;
/* Initialize the applet */
public void init()
{
setLayout(new BorderLayout());
Panel pan = new Panel();
pan.setLayout(new GridLayout(2,3));
buttonInfo = new Button("GL4Java");
buttonInfo.addMouseListener(this);
pan.add(buttonInfo);
checkUseRepaint = new Checkbox("repaint", true);
checkUseRepaint.addItemListener(this);
pan.add(checkUseRepaint);
checkUseFpsSleep = new Checkbox("fps-sleep", true);
checkUseFpsSleep.addItemListener(this);
pan.add(checkUseFpsSleep);
buttonReStart = new Button("start/stop");
buttonReStart.addMouseListener(this);
pan.add(buttonReStart);
buttonFps = new Button("fps: ");
buttonFps.addMouseListener(this);
pan.add(buttonFps);
textFps=new TextField("0000000000");
textFps.addActionListener(this);
pan.add(textFps);
add("South",pan);
}
public void start()
{
checkUseFpsSleep.setState(canvas.getUseFpsSleep());
checkUseRepaint.setState(canvas.getUseRepaint());
canvas.start();
}
public void stop()
{
canvas.stop();
}
public void destroy()
{
if(fInfo!=null)
{
fInfo.dispose();
fInfo=null;
}
canvas.stop();
canvas.cvsDispose();
}
// 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(buttonFps) )
{
double fps = 0;
int a1;
canvas.stopFpsCounter();
fps=canvas.getFps();
a1=(int)(fps*100.0);
fps=(double)a1/100.0;
textFps.setText(String.valueOf(fps));
canvas.resetFpsCounter();
} else if( comp.equals(buttonInfo) )
{
if(fInfo==null && canvas!=null && canvas.getGLContext()!=null)
fInfo = showGLInfo();
}
else if( comp.equals(buttonReStart) )
{
canvas.setSuspended(!canvas.isSuspended(),
evt.getClickCount()>1 // -> ReInit
);
}
}
public void itemStateChanged( ItemEvent evt )
{
ItemSelectable comp = evt.getItemSelectable();
if( comp.equals(checkUseRepaint ) )
{
if(canvas!=null)
{
canvas.setUseRepaint(checkUseRepaint.getState());
System.out.println("canvas uses repaint: "+
checkUseRepaint.getState());
}
}
if( comp.equals(checkUseFpsSleep ) )
{
if(canvas!=null)
{
canvas.setUseFpsSleep(checkUseFpsSleep.getState());
System.out.println("canvas uses fps-sleep: "+
checkUseFpsSleep.getState());
}
}
}
public void actionPerformed(ActionEvent event)
{
Object source = event.getSource();
if ( source == textFps)
{
try {
double FramesPerSec=
Double.valueOf(textFps.getText()).doubleValue();
if(canvas!=null)
{
canvas.setAnimateFps(FramesPerSec);
canvas.setSuspended(false, true);
}
} catch (NumberFormatException s) {
System.out.println("wrong fps format, use float ..");
}
}
}
public void windowOpened(WindowEvent e)
{
}
public void windowClosing(WindowEvent e)
{
Window w = e.getWindow();
if(w == fInfo && fInfo!=null)
{
fInfo.dispose();
fInfo=null;
}
}
public void windowClosed(WindowEvent e)
{
Window w = e.getWindow();
if(w == fInfo && fInfo!=null)
{
fInfo.dispose();
fInfo=null;
}
}
public void windowIconified(WindowEvent e)
{
}
public void windowDeiconified(WindowEvent e)
{
}
public void windowActivated(WindowEvent e)
{
}
public void windowDeactivated(WindowEvent e)
{
}
public Frame showGLInfo()
{
if(canvas==null) return null;
GLContext glc = canvas.getGLContext();
if(glc==null) return null;
GLFunc gl = glc.getGLFunc();
if(gl==null) return null;
GLUFunc glu = glc.getGLUFunc();
if(gl==null) return null;
canvas.setSuspended(true, false);
Frame f = new Frame("GL4Java Version");
TextArea info= new TextArea(25, 80);
info.setEditable(false);
f.add(info);
f.setSize(600, 400);
String str = "null string";
if( glc.gljMakeCurrent() == false )
{
str="problem in use() method\n";
} else {
str=canvas.getGLContext().gljGetVersions();
if(str==null)
str="could not get versions";
System.out.println(str);
glc.gljFree();
}
info.append(str);
f.addWindowListener(this);
canvas.setSuspended(false, false);
f.pack();
f.setVisible(true);
return f;
}
}
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