import java.applet.Applet;
import java.awt.event.*;
import java.awt.*;
import java.awt.geom.*;

public class SelectRing {
    double x,y,w,h;
    String S;
    int on;
    Font FONT;
    boolean CORRECT;
    int[] PREVECTOR=new int[3];
    ListenSquare MAIN,SEND;

    /*rectangle*/

    public SelectRing(String S) {
	this.S=S;
    }

    public SelectRing(double x,double y,double w,double h,String S) {
	this.x=x;
	this.y=y;
	this.w=w;
	this.h=h;
        this.FONT=new Font("Helvetica",Font.PLAIN,12);
	this.S=S;
	MAIN=new ListenSquare(x,y,w,h);
	CORRECT=true;
    }

    /* drawing methods */

    public void render(Graphics g,Color C1,Color C2,Color C3,Color C4) {
	int n1=S.length();
	g.setColor(C1);	
	if(CORRECT==false) g.setColor(C2);
	g.fillRect((int)(x),(int)(y),(int)(w),(int)(h));

	if(on==1) g.setColor(C3);
	g.drawRect((int)(x),(int)(y),(int)(w),(int)(h));
	g.setColor(C4);
        g.setFont(FONT);
	g.drawString(S,(int)(x+3),(int)(y+h-2));
    }

    /**evaluating the text*/

    public boolean setValues() {
	try{
          int[] X=evaluate();
	  PREVECTOR[0]=X[0];
	  PREVECTOR[1]=X[1];
	  PREVECTOR[2]=X[2];
	}
	catch(Exception e) {}
	return(true);
    }


    /**processing the text*/

    public int countPM() {
	return(countPM(S));
    }

    public int countPM(String T) {
	int count1=0;
	int n=T.length();
	for(int i=0;i<n;++i) {
	    char ch=T.charAt(i);
	    if(ch=='+') ++count1;
	    if(ch=='-') ++count1;
	}
	return(count1);
    }

    public int[] getDividers(String T) {
	int n=countPM(T);
	int[] X=new int[n+1];
	int count=0;
	for(int i=0;i<T.length();++i) {
	    if(T.charAt(i)=='+') {
		X[count]=i;
		++count;
	    }
	    if(T.charAt(i)=='-') {
		X[count]=i;
		++count;
	    }
	}
	X[n]=T.length();
	return(X);
    }


    public int countS(String T) {
	int count1=0;
	int n=T.length();
	for(int i=0;i<n;++i) {
	    char ch=T.charAt(i);
	    if(ch=='s') ++count1;
	}
	return(count1);
    }

    public int countT(String T) {
	int count1=0;
	int n=T.length();
	for(int i=0;i<n;++i) {
	    char ch=T.charAt(i);
	    if(ch=='t') ++count1;
	}
	return(count1);
    }


    public String pad(String T1) {
        int k1=T1.indexOf("+");
	int k2=T1.indexOf("-");
	if((k1!=0)&&(k2!=0)) {
	   String T2="+"+T1;
	   return(T2);
	}
	return(T1);
    }

    public boolean startWithPlus(String T) {
	int k=T.indexOf("+");
	if(k==0) return(true);
	return(false);
    }

    public int[] evaluate() {
	String T=pad(S);
	int[] A=getDividers(T);
	int[] X={0,0,0};
	for(int i=0;i<A.length-1;++i) {
	    String U=T.substring(A[i],A[i+1]);
	    int[] Y=simpleEvaluate(U);
	    if(startWithPlus(U)==true) {
		for(int j=0;j<3;++j) X[j]=X[j]+Y[j];
	    }
	    if(startWithPlus(U)==false) {
		for(int j=0;j<3;++j) X[j]=X[j]-Y[j];
	    }
	}
	return(X);
    }


    public int[] simpleEvaluate(String T) {
	int a=countS(T);
	int b=countT(T);
        String U=T.replace(" ","");  
        U=U.replace("+","");	
        U=U.replace("-","");	
        U=U.replace("s",""); 	
        U=U.replace("t",""); 
	if(U.length()==0) U="1";
	int[] X={0,0,0};
        Integer x=new Integer(U);
	int y=x.intValue();
	if((a==0)&&(b==0)) X[0]=y;
	if((a==1)&&(b==0)) X[1]=y;
	if((b==1)&&(a==0)) X[2]=y;
	return(X);
    }






    public boolean isDigit(char ch) {
        int val=(int)(ch-'0');
        if ((val>=0)&&(val<=9)) {
	    return(true);
	}
	return(false);
    }

    public void accept(int x,int y) {
	Integer X=new Integer(x);
	Integer Y=new Integer(y);
	if(y==0) S=X.toString();
	if(y>0) S=X.toString()+"+"+Y.toString()+"s";
	if(y<0) S=X.toString()+" "+Y.toString()+"s";
	setValues();
    }

    public boolean activate(Point X) {
	if(MAIN.inside(X)==1) on=1;
	if(MAIN.inside(X)==0) on=0;
	return(false);
    }

    public boolean modify(KeyEvent e) {
	if(on==0) return(false);
	int n=S.length();

	char ch=e.getKeyChar();

        if(isDigit(ch)==true) S=S+ch;

	int val=0;
	val=(int)(ch-'s');
	if(val==0) S=S+"s";

	val=(int)(ch-'t');
	if(val==0) S=S+"t";

	val=(int)(ch-'+');
	if(val==0) S=S+"+";

	val=(int)(ch-'-');
	if(val==0) S=S+"-";

	val=(int)(ch-' ');
	if(val==0) S=S+" ";


        if (ch==KeyEvent.VK_BACK_SPACE) {
	    if(n>0) S=S.substring(0,n-1);
        }

        if (ch==KeyEvent.VK_DELETE) {
            S="22";
        }

	if(S.length()>50) S=S.substring(0,n-1);

	setValues();
	return(true);
    }

}