* Create a {@link TextInput} field with an optional preset text
* @param value optional text of the input field
* @return {@link TextInput} field
*/
private TextInput addInput(String value) {
TextInput input = new TextInput(metic);
if (value !=null){
input.setValue(value);
}
setFont(input);
input.setSize(25);
add(input,new MaximalGridLayoutConstraints(ECellPosition.LEFT));
return input;
}