import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.metal.*;
import java.util.StringTokenizer;
/**	This class extends JDialog to make a Message Box having two modes namely 0 and 1,
*	in mode 0 the text is single line and center aligned while in mode 1 the text is
*	multiline and left aligned.
*/
class MsgBox extends JDialog{
	FontMetrics fm;
	int minWidth,maxWidth,strWidth,screenWidth,screenHeight;
	int dialogWidth,dialogHeight,mode;
	MsgBox(Frame f,String cap,int mode){
		super(f,"Typing Tutor",true);
		this.mode=mode;
		Font font=Utilities.getDialogFont();
		fm=getFontMetrics(font);
		Dimension screen=getToolkit().getScreenSize();
		screenWidth=screen.width;
		screenHeight=screen.height;
		minWidth=screenWidth/8;
		maxWidth=screenWidth/2;
		if(mode==0){
			int count=1;
			strWidth=fm.stringWidth(cap);
			while(strWidth>maxWidth){
				strWidth=strWidth-maxWidth;
				count++;
			}
			int l=cap.length()/count;
			int start=0,end=l;
			String temp[]=new String[count];
			for(int i=0;i<count;i++){
				temp[i]=cap.substring(start,end);
				start=end;
				end=end+l;
			}
			displayText(temp);
		}
		else{
			int i=0;
			StringTokenizer st=new StringTokenizer(cap,"$");
			String temp[]=new String[st.countTokens()];
			while(st.hasMoreTokens())
				temp[i++]="    "+st.nextToken();
			displayText(temp);
		}
		setVisible(true);
	}
	private void displayText(String text[]){
		getContentPane().setLayout(new GridLayout(text.length+1,0));
		for(int i=0;i<text.length;i++)
			if(mode==0)
				getContentPane().add(new DialogLabel(text[i],SwingUtilities.CENTER));
			else
				getContentPane().add(new DialogLabel(text[i],SwingUtilities.LEFT));
		JPanel p=new JPanel();
		JButton ok=new JButton("Ok");
		p.add(ok);
		ok.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				dispose();
			}
		});
		getContentPane().add(p);
		strWidth=0;
		for(int i=0;i<text.length;i++)
			if(fm.stringWidth(text[i])>strWidth)
				strWidth=fm.stringWidth(text[i]);
		dialogWidth=minWidth+strWidth+mode*40;
		dialogHeight=screenHeight/6+(text.length-1)*fm.getHeight()*2;
		setBounds((screenWidth-dialogWidth)/2,(screenHeight-dialogHeight)/2,
								dialogWidth,dialogHeight);
	}
}