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JavaFx Editable ComboBox : Showing toString on item selection

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南旧
南旧 2020-12-13 22:32

I have a ComboBox of type Person , in which I have added few object of Person class,

I have used setCellFa

2条回答
  • 渐次进展
    渐次进展 (楼主)
    2020-12-13 23:09

    Here is an answer to my own question which I found best after many efforts and corrections.

    mainComboBox.setButtonCell(
    new ListCell() {
        @Override
        protected void updateItem(Object t, boolean bln) {
            super.updateItem(t, bln);
            if (bln) {
                setText("");
            } else {
                setText(getStringField(t));
            }
        }
    });

mainComboBox.setConverter(
    new StringConverter() {
        private Map map = new HashMap<>();

        @Override
        public String toString(Object t) {
            if (t != null) {
                String str = getStringField(t);
                map.put(str, t);
                return str;
            } else {
                return "";
            }
        }

        @Override
        public Object fromString(String string) {
            if (validate && !map.containsKey(string)) {
                mainComboBox.setValue(null);
                mainComboBox.getEditor().clear();
                return null;
            }
            return map.get(string);
        }
    });

mainComboBox.setCellFactory(
    new Callback, ListCell>() {
        @Override
        public ListCell call(ListView p) {
            ListCell cell = new ListCell() {
                @Override
                protected void updateItem(Object item, boolean empty) {
                    super.updateItem(item, empty);
                    if (empty) {
                        setText("");
                    } else {
                        setText(getStringField(item));
                    }
                }
            };return cell;
        }
    });



    And with required function of getStringField(Object),
    


    public String getStringField(Object o) {
    return ((Pesron) o).getName();
}

    
    
    
             
    
                                                        
    
            
            
    
              
                
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