english version
Indice dei tutorials: http://gheryd.blogspot.com/2011/06/javascript-gwt-tutorials.html
E possibile configurare nel modulo GWT il paese per la corretta formattazione del numero.
Per i formati con virgola ho addottato il valore
Comunque i formati possono essere essere usati formati "custom" con il metodo "setNumberFormat" a cui occorre passare un oggetto NumberFormat. Per disabilitare la formattazione usare il metodo disableFormatting.
Esempio:
CurrencyTextBox ctb = new CurrencyTextBox();
ctb.setNumber(1000);
RootPanel.get().add(ctb);
Indice dei tutorials: http://gheryd.blogspot.com/2011/06/javascript-gwt-tutorials.html
E possibile configurare nel modulo GWT il paese per la corretta formattazione del numero.
<?xml version="1.0" encoding="UTF-8"?>
<module>
<extend-property name="locale" values="it_IT" />
<set-property-fallback name="locale" value="it_IT" />
</module>
Per i formati con virgola ho addottato il valore
public static final NumberFormat nfFloat = NumberFormat.getFormat("#,##0.00");mentre per i valori interi:public static final NumberFormat nfInt = NumberFormat.getFormat("#,##0");Comunque i formati possono essere essere usati formati "custom" con il metodo "setNumberFormat" a cui occorre passare un oggetto NumberFormat. Per disabilitare la formattazione usare il metodo disableFormatting.
import com.google.gwt.event.dom.client.BlurEvent;
import com.google.gwt.event.dom.client.BlurHandler;
import com.google.gwt.event.dom.client.FocusEvent;
import com.google.gwt.event.dom.client.FocusHandler;
import com.google.gwt.event.dom.client.KeyCodes;
import com.google.gwt.event.dom.client.KeyPressEvent;
import com.google.gwt.event.dom.client.KeyPressHandler;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.ui.TextBox;
public class CurrencyTextBox extends TextBox {
public static final NumberFormat nfFloat = NumberFormat.getFormat("#,##0.00");
public static final NumberFormat nfInt = NumberFormat.getFormat("#,##0");
public static interface CurrencyTextBoxHandler {
public void onChange(CurrencyTextBox currencyTextBox);
}
private int decimals = 2;
private int integers = 10;
private NumberFormat nf;
private float cifra = 0f;
private char inputSeparator = '.';
private char currencySumbol = '€';
private boolean enableNegative = false;
private boolean enableDecimal;
private CurrencyTextBoxHandler handler = null;
private String suffix = "";
public CurrencyTextBox() {
this(true, true);
}
public CurrencyTextBox(boolean showCurrencySimbol, boolean enableDecimal) {
super.setTextAlignment(TextBox.ALIGN_RIGHT);
if(!showCurrencySimbol) {
currencySumbol = ' ';
}
this.enableDecimal = enableDecimal;
if(enableDecimal) {
nf = nfFloat;
}else {
nf = nfInt;
}
addKeyPressHandler(keyPressHandler);
addBlurHandler(new BlurHandler() {
@Override
public void onBlur(BlurEvent event) {
if(CurrencyTextBox.this.isReadOnly()) {
return;
}
parse();
showFormatted();
if(handler!=null) {
handler.onChange(CurrencyTextBox.this);
}
}
});
addFocusHandler(new FocusHandler() {
@Override
public void onFocus(FocusEvent event) {
if(CurrencyTextBox.this.isReadOnly()) {
return;
}
if(CurrencyTextBox.this.enableDecimal) {
CurrencyTextBox.super.setText( (cifra==0f?"":cifra)+"" );
}else {
int n = (int)cifra;
CurrencyTextBox.super.setText( (n==0?"":n)+"" );
}
}
});
showFormatted();
}
@Override
public void setValue(String value) {
setText(value);
}
@Override
public String getValue() {
return getText();
}
@Override
public void setText(String text) {
float n = 0f;
try {
n = Float.parseFloat( text );
}catch(Exception e){}
setNumber(n);
}
@Override
public String getText() {
if(enableDecimal) {
Float n = getNumber();
return "" + (n==null ? "" : n);
}else {
Integer n = getNumberAsInteger();
return "" + (n==null ? "" : n);
}
}
public void setNumberFormat(NumberFormat nf) {
this.nf = nf;
showFormatted();
}
public void disableFormatting() {
this.nf = null;
}
public void setEnableNegative(boolean enableNegative) {
this.enableNegative = enableNegative;
}
public void setCurrencyTextBoxHandler(CurrencyTextBoxHandler handler) {
this.handler = handler;
}
public void setDecimals(int decimals) {
this.decimals = decimals;
}
public void setIntegers(int integers) {
this.integers = integers;
}
public void setCurrencySymbol(char symbol) {
this.currencySumbol = symbol;
showFormatted();
}
public float getNumber() {
return cifra;
}
public int getNumberAsInteger() {
return (int)cifra;
}
public void setNumber(Integer cifra) {
if (cifra!=null){
setNumber(cifra.floatValue());
}else {
setNumber(0f);
}
}
public void setNumber(Float cifra) {
if (cifra!=null){
if(enableDecimal) {
this.cifra = cifra;
}else {
this.cifra = cifra.intValue();
}
}else {
this.cifra = 0f;
}
showFormatted();
}
private KeyPressHandler keyPressHandler = new KeyPressHandler(){
@Override
public void onKeyPress(KeyPressEvent event) {
char c = event.getCharCode();
if(c==KeyCodes.KEY_ENTER || c==KeyCodes.KEY_TAB) {
CurrencyTextBox.this.setFocus(false);
return;
}
String text = CurrencyTextBox.super.getText();
int curPos = CurrencyTextBox.this.getCursorPos();
if(c==KeyCodes.KEY_BACKSPACE || c==KeyCodes.KEY_DELETE || c==KeyCodes.KEY_RIGHT || c==KeyCodes.KEY_LEFT) {
return;
}else if( c==KeyCodes.KEY_UP ) {
parse();
cifra++;
CurrencyTextBox.super.setText(cifra+"");
}else if( c==KeyCodes.KEY_DOWN ) {
parse();
cifra--;
CurrencyTextBox.super.setText(cifra+"");
}else if(curPos == 0 && enableNegative && c == '-' && !text.startsWith("c")) {
}else if(c==inputSeparator) {
if(enableDecimal) {
int index = CurrencyTextBox.super.getText().indexOf(inputSeparator);
if(index>-1 && text.length()>=index) {
CurrencyTextBox.this.cancelKey();
}
}else {
CurrencyTextBox.this.cancelKey();
}
}else if( !Character.isDigit(c) ) {
CurrencyTextBox.this.cancelKey();
}
int posSep = -1;
if(enableDecimal)
posSep = text.indexOf(inputSeparator);
if(Character.isDigit(c) && posSep>-1) {
// c'è il punto
if( curPos>posSep && (text.length()-posSep)>decimals ) {
CurrencyTextBox.this.cancelKey();
}else if(curPos<=posSep && posSep>integers ) {
CurrencyTextBox.this.cancelKey();
}
}else if(posSep==-1 && text.length()>=integers) {
// non c'è il punto
CurrencyTextBox.this.cancelKey();
}
}
};
private void parse() {
cifra = 0f;
try {
cifra= Float.parseFloat(CurrencyTextBox.super.getText());
}catch(Exception e) {
cifra = 0f;
}
}
private void showFormatted() {
CurrencyTextBox.super.setText( (currencySumbol!=' '?currencySumbol:"")+" "+ getFormatted() + suffix );
}
private String getFormatted() {
if(nf!=null) {
return nf.format(cifra);
}else {
if(enableDecimal) {
return cifra+"";
}else {
return getNumberAsInteger()+"";
}
}
}
public void setSuffix(String suffix) {
this.suffix = suffix;
showFormatted();
}
}
CurrencyTextBox ctb = new CurrencyTextBox();
ctb.setNumber(1000);
RootPanel.get().add(ctb);
