import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class logisticMap extends Applet implements Runnable{
Thread th;
Image original_i,buf_i,info_i;
Graphics original_g,buf_g,info_g;
boolean goFlag=true,dragFlag=false;
int w,h,x_margin=35,y_margin=15;
Button db,hf,reset;
int mx,my,sx0,sy0,sx1,sy1;
double a_now,x_now;
int plot_max=30000;
int rep_max=1000;
int xp[]=new int[plot_max];
int ap[]=new int[plot_max];
double a_min,a_max,x_min,x_max;
Applet applet = this;
public void init(){
a_min=2.8;a_max=4.0;x_min=0.0;x_max=1.0;
//get screen size
w=getSize().width;
h=getSize().height;
//redefine w and h for buffer layer
w-=20; h-=50;
//create buffer layer
buf_i=createImage(w,h);
buf_g=buf_i.getGraphics();
//create original (temp.) layer
original_i=createImage(w,h);
original_g=original_i.getGraphics();
//create info layer
info_i=createImage(100,10);
info_g=info_i.getGraphics();
//GUI
setLayout(new FlowLayout(1,20,h+20));
add(db=new Button("X2"));
add(hf=new Button("/2"));
add(reset=new Button("reset"));
db.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
db_fig();
}
});
hf.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
hf_fig();
}
});
reset.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
reset_fig();
}
});
//mouse
addMouseMotionListener(
new MouseMotionAdapter(){
public void mouseMoved(MouseEvent e){
mx=e.getX(); my=e.getY();
//ajustment for out of range
if(mxw-x_margin) mx=w-x_margin;
if(myh-y_margin) my=h-y_margin;
//set max and min for a and x
a_now=(double)(mx-x_margin)/(double)(w-x_margin*2)*(a_max-a_min)+a_min;
x_now=x_max-(double)(my-y_margin)/(double)(h-y_margin*2)*(x_max-x_min);
info_g.setColor(Color.white);
info_g.fillRect(0,0,w,10);
info_g.setColor(Color.black);
info_g.drawString("a="+java.lang.Double.toString(a_now).substring(0,5)+", x="+java.lang.Double.toString(x_now).substring(0,5),0,10);
repaint();
}
public void mouseDragged(MouseEvent e){
int i;
dragFlag=true;
mx=e.getX(); my=e.getY();
int vert_of_range_x[]={sx0,mx,mx,sx0};
int vert_of_range_y[]={sy0,sy0,my,my};
//ajustment for out of range
for(i=0;i<4;i++){
if(vert_of_range_x[i]w-x_margin)vert_of_range_x[i]=w-x_margin;
if(vert_of_range_y[i]h-y_margin)vert_of_range_y[i]=h-y_margin;
}
//Image buf_iをImage original_iにしたい...
buf_g.drawImage(original_i,0,0,applet);
buf_g.setColor(Color.blue);
buf_g.drawPolygon(vert_of_range_x,vert_of_range_y,4);
a_now=(double)(mx-x_margin)/(double)(w-x_margin*2)*(a_max-a_min)+a_min;
x_now=x_max-(double)(my-y_margin)/(double)(h-y_margin*2)*(x_max-x_min);
info_g.setColor(Color.white);
info_g.fillRect(0,0,w,10);
info_g.setColor(Color.black);
info_g.drawString("a="+java.lang.Double.toString(a_now).substring(0,5)+", x="+java.lang.Double.toString(x_now).substring(0,5),0,10);
repaint();
}
}
);
addMouseListener(
new MouseAdapter(){
public void mousePressed(MouseEvent e){
sx0=e.getX(); sy0=e.getY();
//現在のImage buf_iをImage original_iに格納したい...
original_g.drawImage(buf_i,0,0,applet);
//System.out.println(sx0);
}
public void mouseReleased(MouseEvent e){
if(dragFlag){
double a_min_n,a_max_n,x_min_n,x_max_n;
int s_buf;
sx1=e.getX(); sy1=e.getY();
if(sx0>sx1){
s_buf=sx0; sx0=sx1; sx1=s_buf;
}
if(sy0>sy1){
s_buf=sy0; sy0=sy1; sy1=s_buf;
}
//ajustment for out of range
if(sx0w-x_margin) sx0=w-x_margin; if(sx1>w-x_margin) sx1=w-x_margin;
if(sy0h-y_margin) sy0=h-y_margin; if(sy1>h-y_margin) sy1=h-y_margin;
//set max and min for a and x
a_min_n=(double)(sx0-x_margin)/(double)(w-x_margin*2)*(a_max-a_min)+a_min;
a_max_n=(double)(sx1-x_margin)/(double)(w-x_margin*2)*(a_max-a_min)+a_min;
x_min_n=x_max-(double)(sy1-y_margin)/(double)(h-y_margin*2)*(x_max-x_min);
x_max_n=x_max-(double)(sy0-y_margin)/(double)(h-y_margin*2)*(x_max-x_min);
a_min=a_min_n; a_max=a_max_n;
x_min=x_min_n; x_max=x_max_n;
dragFlag=false;
goFlag=true;
repaint();
}
}
}
);
setBackground(Color.white);
}
public void start(){
th=new Thread(this);
th.start();
}
public void stop(){
goFlag=false;
}
public void run(){
while(goFlag){
repaint();
try{Thread.sleep(10);}
catch(InterruptedException e){}
}
}
public void update(Graphics g){
this.paint(g);
}
public void paint(Graphics g){
if(goFlag){
//initialize buffer layer
init_b();
//draw grid
grid(a_min,a_max,x_min,x_max);
//draw logistic
logistic(a_min,a_max,x_min,x_max);
//draw blank info layer
no_info();
g.drawImage(info_i,x_margin+20,30,this);
//show buffer layer
g.drawImage(buf_i,10,10,this);
}
else if(dragFlag){
//show buffer layer
//g.drawImage(original_i,10,10,this);
g.drawImage(buf_i,10,10,this);
}
//show info layer
g.drawImage(info_i,x_margin+20,30,this);
}
public void init_b(){
buf_g.setColor(Color.white);
buf_g.fillRect(0,0,w,h);
}
public void grid(double a_min,double a_max,double x_min,double x_max){
String str_a_min=java.lang.Double.toString(a_min)+"00000";
String str_a_max=java.lang.Double.toString(a_max)+"00000";
String str_x_min=java.lang.Double.toString(x_min)+"00000";
String str_x_max=java.lang.Double.toString(x_max)+"00000";
buf_g.setColor(Color.black);
buf_g.drawRect(x_margin,y_margin,w-x_margin*2,h-y_margin*2);
buf_g.drawString(str_a_min.substring(0,5),x_margin,h-1);
buf_g.drawString(str_a_max.substring(0,5)+"[a]",w-x_margin*2+5,h-1);
buf_g.drawString(str_x_min.substring(0,5),5,h-y_margin*2+10);
buf_g.drawString(str_x_max.substring(0,5),5,y_margin+15);
buf_g.drawString("[x]",5,y_margin);
}
public void logistic(double a_min,double a_max,double x_min,double x_max){
int plot,rep;
double a,x0,x1;
for(plot=0;plot=y_margin&&xp[plot]<=(h-y_margin)){
buf_g.drawLine(ap[plot],xp[plot],ap[plot],xp[plot]);
}
}
}
public void no_info(){
info_g.setColor(Color.white);
info_g.fillRect(0,0,w,10);
info_g.setColor(Color.black);
}
public void db_fig(){
double a_range=(a_max-a_min)/2;
double x_range=(x_max-x_min)/2;
a_min+=a_range/2; a_max-=a_range/2;
x_min+=x_range/2; x_max-=x_range/2;
goFlag=true;
start();
}
public void hf_fig(){
double a_range=(a_max-a_min)/2;
double x_range=(x_max-x_min)/2;
a_min-=a_range; a_max+=a_range;
x_min-=x_range; x_max+=x_range;
if(a_min<2.8)a_min=2.8;
if(a_max>4)a_max=4.0;
if(x_min<0)x_min=0.0;
if(x_max>1)x_max=1.0;
goFlag=true;
start();
}
public void reset_fig(){
a_min=2.8;a_max=4.0;x_min=0.0;x_max=1.0;
goFlag=true;
start();
}
}
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