import java.awt.*;
import java.awt.event.*;
public class ast00803 extends java.applet.Applet implements
ActionListener,MouseListener
// Software written by William Overington
// WOverington@ngo.globalnet.co.uk
// 23 July 2001
// Copyright 2001 William Overington
//
{
int obeycode;
int storedobeycode;
int pressx,pressy;
boolean SIMULATION_DVB_MHP_MOUSE_ATTACHED=false;
// this is what the simulation management environment knows
boolean mouseattached;
// this is what the simulated program knows
Button colourButton1 = new Button("");
Button colourButton2 = new Button("");
Button colourButton3 = new Button("");
Button colourButton4 = new Button("");
Button digitButton0 = new Button("0");
Button digitButton1 = new Button("1");
Button digitButton2 = new Button("2");
Button digitButton3 = new Button("3");
Button digitButton4 = new Button("4");
Button digitButton5 = new Button("5");
Button digitButton6 = new Button("6");
Button digitButton7 = new Button("7");
Button digitButton8 = new Button("8");
Button digitButton9 = new Button("9");
Button upButton = new Button("^");
Button downButton = new Button("v");
Button leftButton = new Button("<");
Button rightButton = new Button(">");
Button enterButton = new Button("E");
Button teletextButton = new Button("T");
Font buttonsfont,displayfont;
// polyglot compatibility section starts
String title="Simulation of a harmonograph.";
String messageaboutred="up";
String messageaboutgreen="down";
String messageaboutyellow="draw";
String messageaboutblue="clear number";
String choice1="1 yellow";
String choice2="2 green";
String choice3="3 cyan";
String choice4="4 orange";
String choice5="5 white";
// polyglot compatibility section finishes
int a,p,b,q;
char focus;
int displayscreen;
int chosencolour;
int sofar;
int percentsofar;
int oldpercentsofar=-1;
public void init()
{
setLayout(null);
setBounds(0,0,512,400);
buttonsfont = new Font("SansSerif", Font.PLAIN, 18);
displayfont = new Font("SansSerif", Font.PLAIN, 24);
setFont(buttonsfont);
colourButton1.addActionListener(this);
colourButton1.setLocation(16,327);
colourButton1.setSize(25,25);
colourButton1.setBackground(Color.red);
add(colourButton1);
colourButton2.addActionListener(this);
colourButton2.setLocation(48,327);
colourButton2.setSize(25,25);
colourButton2.setBackground(Color.green);
add(colourButton2);
colourButton3.addActionListener(this);
colourButton3.setLocation(80,327);
colourButton3.setSize(25,25);
colourButton3.setBackground(Color.yellow);
add(colourButton3);
colourButton4.addActionListener(this);
colourButton4.setLocation(112,327);
colourButton4.setSize(25,25);
colourButton4.setBackground(Color.blue);
add(colourButton4);
digitButton0.addActionListener(this);
digitButton0.setLocation(16,359);
digitButton0.setSize(25,25);
digitButton0.setBackground(Color.lightGray);
add(digitButton0);
digitButton1.addActionListener(this);
digitButton1.setLocation(48,359);
digitButton1.setSize(25,25);
digitButton1.setBackground(Color.lightGray);
add(digitButton1);
digitButton2.addActionListener(this);
digitButton2.setLocation(80,359);
digitButton2.setSize(25,25);
digitButton2.setBackground(Color.lightGray);
add(digitButton2);
digitButton3.addActionListener(this);
digitButton3.setLocation(112,359);
digitButton3.setSize(25,25);
digitButton3.setBackground(Color.lightGray);
add(digitButton3);
digitButton4.addActionListener(this);
digitButton4.setLocation(144,359);
digitButton4.setSize(25,25);
digitButton4.setBackground(Color.lightGray);
add(digitButton4);
digitButton5.addActionListener(this);
digitButton5.setLocation(176,359);
digitButton5.setSize(25,25);
digitButton5.setBackground(Color.lightGray);
add(digitButton5);
digitButton6.addActionListener(this);
digitButton6.setLocation(208,359);
digitButton6.setSize(25,25);
digitButton6.setBackground(Color.lightGray);
add(digitButton6);
digitButton7.addActionListener(this);
digitButton7.setLocation(240,359);
digitButton7.setSize(25,25);
digitButton7.setBackground(Color.lightGray);
add(digitButton7);
digitButton8.addActionListener(this);
digitButton8.setLocation(272,359);
digitButton8.setSize(25,25);
digitButton8.setBackground(Color.lightGray);
add(digitButton8);
digitButton9.addActionListener(this);
digitButton9.setLocation(304,359);
digitButton9.setSize(25,25);
digitButton9.setBackground(Color.lightGray);
add(digitButton9);
upButton.addActionListener(this);
upButton.setLocation(372,327);
upButton.setSize(25,25);
upButton.setBackground(Color.lightGray);
add(upButton);
downButton.addActionListener(this);
downButton.setLocation(372,359);
downButton.setSize(25,25);
downButton.setBackground(Color.lightGray);
add(downButton);
leftButton.addActionListener(this);
leftButton.setLocation(340,343);
leftButton.setSize(25,25);
leftButton.setBackground(Color.lightGray);
add(leftButton);
rightButton.addActionListener(this);
rightButton.setLocation(404,343);
rightButton.setSize(25,25);
rightButton.setBackground(Color.lightGray);
add(rightButton);
enterButton.addActionListener(this);
enterButton.setLocation(439,359);
enterButton.setSize(25,25);
enterButton.setBackground(Color.lightGray);
add(enterButton);
teletextButton.addActionListener(this);
teletextButton.setLocation(471,359);
teletextButton.setSize(25,25);
teletextButton.setBackground(Color.lightGray);
add(teletextButton);
addMouseListener(this);
setBackground(Color.black);
obeycode=1;
storedobeycode=1;
// default cases that give a good display
a=1000;
p=300000;
b=1330;
q=300000;
focus='a';
chosencolour=2;
}
public void actionPerformed(ActionEvent event)
{
Object source = event.getSource();
if (source == colourButton1)
{
obeycode=51;
repaint();
}
else
if (source == colourButton2)
{
obeycode=52;
repaint();
}
else
if (source == colourButton3)
{
obeycode=53;
repaint();
}
else
if (source == colourButton4)
{
obeycode=54;
repaint();
}
else
if (source == digitButton0)
{
obeycode=20;
repaint();
}
else
if (source == digitButton1)
{
obeycode=21;
repaint();
}
else
if (source == digitButton2)
{
obeycode=22;
repaint();
}
else
if (source == digitButton3)
{
obeycode=23;
repaint();
}
else
if (source == digitButton4)
{
obeycode=24;
repaint();
}
else
if (source == digitButton5)
{
obeycode=25;
repaint();
}
else
if (source == digitButton6)
{
obeycode=26;
repaint();
}
else
if (source == digitButton7)
{
obeycode=27;
repaint();
}
else
if (source == digitButton8)
{
obeycode=28;
repaint();
}
else
if (source == digitButton9)
{
obeycode=29;
repaint();
}
else
if (source == upButton)
{
obeycode=61;
repaint();
}
else
if (source == downButton)
{
obeycode=62;
repaint();
}
else
if (source == leftButton)
{
obeycode=63;
repaint();
}
else
if (source == rightButton)
{
obeycode=64;
repaint();
}
else
if (source == enterButton)
{
obeycode=91;
repaint();
}
else
if (source == teletextButton)
{
obeycode=92;
repaint();
}
}
public void mousePressed(MouseEvent e)
{
pressx=e.getX();
pressy=e.getY();
if ((pressy > 300) & (pressy < 311))
// then a command to the simulation environment management is intended
//
// the 300 is used in the test rather than 288 so as to give a blank area below
// the simulated display screen just in case a click intended for the bottom
// of the simulated display screen is clicked a few pixels low in error
{
if (pressx < 256) // simulated no DVB-MHP mouse
{
SIMULATION_DVB_MHP_MOUSE_ATTACHED=false;
}
else // simulated DVB-MHP mouse present
{
SIMULATION_DVB_MHP_MOUSE_ATTACHED=true;
}
obeycode=1;
repaint();
}
else if (pressy <= 287)
// then a click within the simulation on the simulated display screen is intended
{
if(SIMULATION_DVB_MHP_MOUSE_ATTACHED)
{
obeycode=41;
repaint();
}
else
{
donothing();
}
}
else
// the mouse press is on the simulated hand held infra-red control device
// or the upper part of the white area and is disregarded
{
donothing();
}
}
public void mouseReleased(MouseEvent e)
{
}
public void mouseClicked(MouseEvent e)
{
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{
}
public void paint(Graphics screen)
{
storedobeycode=obeycode;
screen.setFont(displayfont);
if(obeycode == 1)
{
// start up for the simulation management
screen.setColor(Color.black);
screen.fillRect(0,0,512,288);
screen.setColor(Color.white);
screen.fillRect(0,288,512,112);
screen.setColor(Color.gray);
screen.fillRoundRect(0,311,512,89,20,20);
screen.clipRect(0,0,512,288);
// start up for the program that is being simulated
mouseattached=SIMULATION_FOR_MOUSE_getInputDeviceSupported();
displayscreen=1;
screen.setColor(Color.cyan);
screen.drawString(title,20,50);
// title in English is "Simulation of a harmonograph."
screen.setColor(Color.red);
screen.fillRect(15,110,20,20);
screen.setColor(Color.green);
screen.fillRect(15,150,20,20);
screen.setColor(Color.yellow);
screen.fillRect(15,190,20,20);
screen.setColor(Color.blue);
screen.fillRect(15,230,20,20);
screen.setColor(Color.cyan);
screen.drawString(messageaboutred,40,130);
// messageaboutred in English is "up"
screen.drawString(messageaboutgreen,40,170);
// messageaboutgreen in English is "down"
screen.drawString(messageaboutyellow,40,210);
// messageaboutyellow in English is "draw"
screen.drawString(messageaboutblue,40,250);
// messageaboutblue in English is "clear number"
//
screen.drawString("a =",300,130);
screen.drawString("p =",300,170);
screen.drawString("b =",300,210);
screen.drawString("q =",300,250);
//
screen.drawString("" + a,350,130);
screen.drawString("" + p,350,170);
screen.drawString("" + b,350,210);
screen.drawString("" + q,350,250);
//
// setting the display for the focus being 'a' at the start
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,110,5,25);
}
else
if(obeycode == 51) // red button pressed
{
if(displayscreen == 1)
{
if(focus == 'a')
{
focus='q';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,230,5,25);
}
else if(focus == 'p')
{
focus='a';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,110,5,25);
}
else if(focus == 'b')
{
focus='p';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,150,5,25);
}
else if(focus == 'q')
{
focus='b';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,190,5,25);
}
}
}
else if(obeycode == 52) // green button pressed
{
if(displayscreen == 1)
{
if(focus == 'a')
{
focus='p';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,150,5,25);
}
else if(focus == 'p')
{
focus='b';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,190,5,25);
}
else if(focus == 'b')
{
focus='q';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,230,5,25);
}
else if(focus == 'q')
{
focus='a';
screen.setColor(Color.black); // magenta during development for testing
screen.fillRect(280,110,5,150);
screen.setColor(Color.orange);
screen.fillRect(280,110,5,25);
}
}
}
else if(obeycode == 53) // yellow button pressed
{
if(displayscreen == 1)
{
displayscreen=2;
screen.setColor(Color.black);
screen.fillRect(0,0,512,288);
screen.setColor(Color.yellow);
screen.drawString(choice1,40,90);
// choice1 in English is "1 yellow"
screen.setColor(Color.green);
screen.drawString(choice2,40,130);
// choice2 in English is "2 green"
screen.setColor(Color.cyan);
screen.drawString(choice3,40,170);
// choice3 in English is "3 cyan"
screen.setColor(Color.orange);
screen.drawString(choice4,40,210);
// choice4 in English is "4 orange"
screen.setColor(Color.white);
screen.drawString(choice5,40,250);
// choice5 in English is "5 white"
}
else if(displayscreen == 2)
{
donothing();
}
}
else if(obeycode == 54) // blue button pressed
{
if(displayscreen == 1)
{
if(focus == 'a')
{
a=0;
screen.setColor(Color.black); // orange during development for testing
screen.fillRect(350,100,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + a,350,130);
}
else if(focus == 'p')
{
p=0;
screen.setColor(Color.black);
screen.fillRect(350,140,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + p,350,170);
}
else if(focus == 'b')
{
b=0;
screen.setColor(Color.black);
screen.fillRect(350,180,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + b,350,210);
}
else if(focus == 'q')
{
q=0;
screen.setColor(Color.black);
screen.fillRect(350,220,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + q,350,250);
}
}
}
else if((obeycode >= 20) & (obeycode <= 29)) // a digit button pushed
{
if(displayscreen == 1)
{
int value;
value=obeycode - 20;
if(focus == 'a')
{
a=a*10 + value;
screen.setColor(Color.black);
screen.fillRect(350,100,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + a,350,130);
}
else if(focus == 'p')
{
p=p*10 + value;
screen.setColor(Color.black);
screen.fillRect(350,140,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + p,350,170);
}
else if(focus == 'b')
{
b=b*10 + value;
screen.setColor(Color.black);
screen.fillRect(350,180,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + b,350,210);
}
else if(focus == 'q')
{
q=q*10 + value;
screen.setColor(Color.black);
screen.fillRect(350,220,162,40);
screen.setColor(Color.cyan);
screen.drawString("" + q,350,250);
}
}
else if(displayscreen == 2)
{
int value;
value=obeycode - 20;
chosencolour=value;
if((value >= 1) & (value <= 5))
{
screen.setColor(Color.black);
screen.fillRect(0,0,512,288);
if(chosencolour == 1)
{
screen.setColor(Color.yellow);
}
else if(chosencolour == 2)
{
screen.setColor(Color.green);
}
else if(chosencolour == 3)
{
screen.setColor(Color.cyan);
}
else if(chosencolour == 4)
{
screen.setColor(Color.orange);
}
else if(chosencolour == 5)
{
screen.setColor(Color.white);
}
}
boolean pendown=false;
double x,y;
int xdisplay,ydisplay;
int oldxdisplay=0;
int oldydisplay=0;
double aover1000,pover1000,bover1000,qover1000;
aover1000=((double)a)/(double)1000.0;
pover1000=((double)p)/(double)1000.0;
bover1000=((double)b)/(double)1000.0;
qover1000=((double)q)/(double)1000.0;
screen.drawLine(6,278,506,278);
// draws a gauge line along the bottom of the screen
for(int i=0;i < 5000000; i++) // five million
{
double t;
t=((double)i)/((double)1000.0);
x = Math.cos(aover1000*t)*Math.exp(-t/pover1000) +
Math.cos(bover1000*t)*Math.exp(-t/qover1000);
y = Math.sin(aover1000*t)*Math.exp(-t/pover1000);
xdisplay=256 + (int)((double)100.0*x);
ydisplay=144 - (int)((double)100.0*y);
if(pendown)
{
screen.drawLine(oldxdisplay,oldydisplay,xdisplay,ydisplay);
sofar=i/10000;
// thus sofar should go from 0 to 499 during a run
percentsofar=i/50000;
// thus percentsofar should go from 0 to 99 during a run
if(percentsofar != oldpercentsofar)
{
oldpercentsofar=percentsofar;
screen.setColor(Color.black); // blue during development
screen.fillRect(0,210,60,40);
if(chosencolour == 1)
{
screen.setColor(Color.yellow);
}
else if(chosencolour == 2)
{
screen.setColor(Color.green);
}
else if(chosencolour == 3)
{
screen.setColor(Color.cyan);
}
else if(chosencolour == 4)
{
screen.setColor(Color.orange);
}
else if(chosencolour == 5)
{
screen.setColor(Color.white);
}
screen.drawString("" + percentsofar + "%",6,240);
}
screen.drawLine(sofar + 6,268,sofar + 6,268);
}
oldxdisplay=xdisplay;
oldydisplay=ydisplay;
pendown=true;
// delay loop so that the picture draws slowly on the screen
for(int j=0;j < 1000;j++)
{
double r;
r=Math.random();
}
}
}
else if(displayscreen == 3)
{
donothing();
}
}
else if(obeycode == 41) // response to pressing the mouse button
{
donothing();
}
obeycode=1;
}
public void update(Graphics screen)
{
paint(screen);
}
private void donothing()
{
// does nothing
}
private boolean SIMULATION_FOR_MOUSE_getInputDeviceSupported()
{
return SIMULATION_DVB_MHP_MOUSE_ATTACHED;
}
}