/*	

	FIle:		ChoiceTest.java
	Author:	Chris Johnson
			johnson@dcs.gla.ac.uk
	
	Last modified: 23/10/98
	
	Acknowledgement:
		This implements an Applet originally developed in D.M. Geary's GraphicJava1.1,
		The SunSoft Press, Prentice Hall, 1997, page 201-202.   I translated it into AWT1.0
		so that it could be adapted for a course that only had access to 1.0.
	
	Description:
		Three choices are presented to the user: font; size and style.   The font enables them
		to select between Helvetica, Times etc.   The exact nature of this choice is determined
		by the fonts available on a particular system.   The size provides a choice point sizes.
		The style refers to italics, bold, plain etc.    A label is then updated to show what the
		effect of these different selections would be on a particular piece of text.

*/



import java.applet.Applet;
import java.awt.*;
					
public class ChoiceTest extends Applet{
	
	private FontPanel fontPanel = new FontPanel(this);
	
	private Label label = new Label("   ", Label.CENTER);
	/* Used to display the textual label that illustrates the application of the font, style and size */
	
	public void init() {
		
		setLayout(new BorderLayout());
		add("North", fontPanel);
		add("Center", label);
		
	}
	
	
	public void start(){
		updateLabel(fontPanel.getSelectedFont());
	}
	
	public void updateLabel(Font font){
		
		label.setText(fullNameOfFont(font));
		label.setFont(font);
	}
	
	private String fullNameOfFont(Font font){
		String family = font.getFamily();
		String style = new String();
		
		switch(font.getStyle()){
			
			case Font.PLAIN: style = " Plain "; break;
			case Font.BOLD: style = " Bold "; break;
			case Font.ITALIC: style = " Italic "; break;
			
			case Font.BOLD + Font.ITALIC: style = " Bold Italic "; break;
		}
		
		return family + style + Integer.toString(font.getSize());
		/* remember that + can be used to concatenate two strings together */
	}
}

class FontPanel extends Panel{
	
	static boolean DEBUG=false; /* prints out debugging messages if true */ 
	
	private ChoiceTest choiceTest;
	private Choice familyChoice = new Choice(); /* Helvetica etc */
	private Choice	styleChoice = new Choice();	  /*Bold, Italics etc */
	private Choice	sizeChoice = new Choice();    /* Point size...*/
					
	public FontPanel(ChoiceTest applet){
		
		choiceTest = applet;
		
		populateFonts();
		populateStyles();
		populateSizes();
		
		add(familyChoice);
		add(styleChoice);
		add(sizeChoice);
	}
	
	private void populateFonts(){
		String fontNames[] = getToolkit().getFontList();
		
		for(int i=0; i<fontNames.length; ++i)
			familyChoice.addItem(fontNames[i]);
	}
	
	private void populateStyles(){
		styleChoice.addItem("Plain");
		styleChoice.addItem("Bold");
		styleChoice.addItem("Italics");
		styleChoice.addItem("BoldItalic");
	}
	
	
	private void populateSizes(){
		String sizes[]  = {"12", "14", "16", "18", "24", "36"};
		
		for (int i=0; i < sizes.length; ++i)
			sizeChoice.addItem(sizes[i]);
			
	}
	
	public Font getSelectedFont(){
		
		return new Font(familyChoice.getSelectedItem(),
		styleChoice.getSelectedIndex(),
		Integer.parseInt(sizeChoice.getSelectedItem()));
		
	}
	
	public boolean action(Event event, Object what){
	/* Convenience method action() is available for choice components */
	
		String Debug_String = "";
		
		if (DEBUG){
			System.out.println("FontPanel: HandleEvent");
			Debug_String = event.toString();
			System.out.println(Debug_String);
		}
			
			
		if (event.target == familyChoice)
			choiceTest.updateLabel(getSelectedFont());
		else if (event.target == styleChoice)
			choiceTest.updateLabel(getSelectedFont());
		else if (event.target == sizeChoice)
			choiceTest.updateLabel(getSelectedFont());
		
		return true;
	}
}