projmi/src/main/java/de/uniluebeck/mi/projmi6/view/NumberTextField.java

package de.uniluebeck.mi.projmi6.view;


import javafx.scene.control.TextField;

/**
 * based on http://blog.axxg.de/javafx-textfield-beschraenken/
 *
 * TextField that only allows two numbers.
 *
 * Created by Johannes on 14/11/2015.
 */
public class NumberTextField extends TextField {



    @Override
    public void replaceText(int start, int end, String text) {
        int charactersRemoved = end -start;
        int charactersAdded = text.length();
        if ((text.matches("[0-9]")||text.length()==0) && getText().length()-charactersRemoved+charactersAdded <=2) {
            super.replaceText(start, end, text);
        }
    }

    @Override
    public void replaceSelection(String text) {
        int newTextLength = getText().length()-getSelectedText().length()+text.length();
        if (newTextLength<=2 && (text.matches("[0-9]")||text.length()==0))  {
            super.replaceSelection(text);
        }
    }

}