package snippets;

import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.util.Currency;
import java.util.Locale;

import org.eclipse.swt.*;
import org.eclipse.swt.events.*;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.*;

import com.common.debug.Debug;

public class TextCurrency {
	public static boolean disableFocusSelection = false;
	//public static Currency currency = Currency.getInstance(Locale.US);
	public static NumberFormat defaultFormat = NumberFormat.getCurrencyInstance(Locale.US);
	public static boolean ignoreModifyEvents = false;
	public static Text text = null;
	
public static void main(String [] args) {
	Display display = new Display();
	Shell shell = new Shell(display);
	shell.setLayout(new GridLayout(1, false));
	
	text = new Text(shell, SWT.SINGLE | SWT.BORDER);
	text.setLayoutData(new GridData(150, -1));
	text.setText(defaultFormat.format(123));
	text.addModifyListener(new ModifyListener() {
		public void modifyText(ModifyEvent event) {
			if(!ignoreModifyEvents) {
				int caretPosition = text.getCaretPosition();
				Number newNumber = null;
				
				try {
					ignoreModifyEvents = true;
					newNumber = defaultFormat.parse(text.getText());
					text.setText(defaultFormat.format(newNumber));
				}//if//
				catch(ParseException e) {
					Debug.log(e);
					//Reset text.
				}//catch//
				finally {
					ignoreModifyEvents = false;
				}//finally//
				
				text.setSelection(caretPosition);
			}//if//
		}
	});
	text.addFocusListener(new FocusListener() {
		public void focusLost(FocusEvent e) {
		}
		public void focusGained(FocusEvent e) {
			if(!disableFocusSelection) {
				text.getDisplay().asyncExec(new Runnable() {
					public void run() {
						text.selectAll();
					}
				});
			}//if//
		}
	});
	text.getShell().addShellListener(new ShellListener() {
		public void shellIconified(ShellEvent e) {
		}
		public void shellDeiconified(ShellEvent e) {
		}
		public void shellDeactivated(ShellEvent e) {
			disableFocusSelection = true;
		}
		public void shellActivated(ShellEvent e) {
			text.getDisplay().asyncExec(new Runnable() {
				public void run() {
					disableFocusSelection = false;
				}
			});
		}
		public void shellClosed(ShellEvent e) {
		}
	});
	
	shell.open();
	while (!shell.isDisposed()) {
		if (!display.readAndDispatch()) display.sleep();
	}
	display.dispose();
}
}