Schimki86 schrieb:
> I use a KeyboardListener to check the typed character. I've seen this
> example in the book "GWT in Action":
>
> public void onKeyUp(Widget sender, char keyCode, int modifiers) {
> if (!Character.isDigit(keyCode)) {
> ((TextBox)sender).cancelKey();
> return;
> }
> }
>
> In IE it works but in FF the Listeners is listen to the control-,
> delete- and backspace- key too. I can't delete an character because
> these keys are no digits.
This is my implementation after finding out the same:
/**
* KeyboardListener allowing only digits to be entered
*/
public static KeyboardListenerAdapter OnlyDigitListener = new
KeyboardListenerAdapter() {
public void onKeyPress(final Widget sender, final char keyCode, final
int modifiers) {
switch(keyCode){
case KEY_LEFT:
case KEY_DOWN:
case KEY_RIGHT:
case KEY_UP:
case KEY_BACKSPACE:
case KEY_DELETE:
return;
}
if (!Character.isDigit(keyCode)) {
((TextBoxBase) sender).cancelKey();
}
}
};
Works here. The class is a static inner class, so I can use
it in all components that need a digit-only textbox. As
well you can create new anonymous classes that way, to change
the behavior:
textBox.addKeyboardListener(new OnlyDigitListener(){
public void onKeyPress(final Widget sender, final char keyCode, final int
modifiers) {
if (keyCode == '.' || keyCode == '-'){
return;
}
super.onKeyPress(sender, keyCode, modifiers);
}
}
Regards, Lothar
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