protected String getCurrencyAmountPattern() {
StringBuffer strBuf = new StringBuffer("#,##0");
int precision = currencyData.getDefaultFractionDigits();
if (precision > 0) {
strBuf.append('.');
for (int i = 0; i < precision; i++) {
strBuf.append('0');
}
}
return strBuf.toString();
}
/**
* Constructs a CurrencyWidget object with specified currency.
*
* @param currencyCode International currency code (ISO 4217).
*/
public CurrencyWidget(String currencyCode) {
currencyData = CurrencyList.get().lookup(currencyCode);
assert (currencyData != null);
currencySymbol = new Label(currencyData.getPortableCurrencySymbol());
formatter = NumberFormat.getFormat(getCurrencyAmountPattern());
initWidget(horizontalPanel);
horizontalPanel.setSpacing(2);
if (isLeadingSymbol()) {
horizontalPanel.add(currencySymbol);
horizontalPanel.add(amountBox);
amountBox.setTextAlignment(TextBoxBase.ALIGN_LEFT);
} else {
horizontalPanel.add(amountBox);
horizontalPanel.add(currencySymbol);
amountBox.setTextAlignment(TextBoxBase.ALIGN_RIGHT);
}
amountBox.setText(formatter.format(0));
amountBox.addFocusListener(
new FocusListener() {
public void onFocus(Widget sender) {
if (!valueInitiated) {
amountBox.setText("");
valueInitiated = true;
}
}
public void onLostFocus(Widget sender) {
amountBox.setText(reformatContent());
}
});
amountBox.addKeyboardListener(
new KeyboardListenerAdapter() {
public void onKeyDown(Widget sender, char keyCode, int modifiers) {
if (keyCode == (char) KEY_ENTER) {
amountBox.setText(reformatContent());
}
}
public void onKeyPress(Widget sender, char keyCode, int modifiers) {
if (acceptableCharset.indexOf(keyCode) == -1) {
amountBox.cancelKey();
}
if (amountBox.getText().length() >= 16) {
amountBox.cancelKey();
}
}
});
}