Javafx combobox with checkbox - javafx

Question

I want to know how to change the selectionmodel of javafxml combobox so that it can allow multiple seletion. I try to create a JavaFX ComboBox with CheckBoxes in the dropdown menu. My code:
public void alLStatus() throws SQLException {
allStatus.clear();
cb_statuItem.getItems().clear();
DbManager test = new DbManager();
String sql = "SELECT allStatus FROM Items ;";
Statement stmt = test.connect().createStatement();
ResultSet rs = stmt.executeQuery(sql);
while (rs.next()) {
Items a = new Items();
a.setStatusItems(rs.getString("statusItems"));
allStatus.add(a);
}
test.disconnect();
cb_statuItem.setItems(allStatus);
cb_statuItem.setConverter(new StringConverter<Items>() {
#Override
public String toString(Items object) {
// //System.out.print("converting object: ");
if (object == null) {
// //System.out.println("null");
return "[none]";
}
// //System.out.println(object.toString());
return object.getStatusItems();
}
#Override
public Items fromString(String string) {
throw new RuntimeException("not required for non editable ComboBox");
}
});
cb_statuItem.setCellFactory(new Callback<ListView<Items>, ListCell<Items>>() {
#Override
public ListCell<Items> call(ListView<Items> param) {
return new ListCell<Items>() {
private CheckBox cb = new CheckBox();
private BooleanProperty booleanProperty;
{
cb.setOnAction(e->getListView().getSelectionModel().select(getItem()));
}
#Override
protected void updateItem(Items item, boolean empty) {
super.updateItem(item, empty);
if (!empty) {
booleanProperty = item.selectedProperty();
cb.selectedProperty().bindBidirectional(booleanProperty);
setGraphic(cb);
setText(item.getStatusItems() + "");
} else {
setGraphic(null);
setText(null);
}
}
};
}
});
}
ComboBox show text like status of Items but don't allow to click on checkbox, it's automatically close.
I want to check more items from comboBox and get them in list. BooleanProperty is always return false.
Any contribution will be appreciated thanks.

Answer 1

Take a look at controlsfx, it's a library for JavaFX components, and has a component called
CheckComboBox, which seems to be exactly what you need.

Answer 2

Here's the example sample code for the problem which can give some new idea. Just an example how Checkbox can be added to Combobox.
import org.controlsfx.control.CheckComboBox;
import javafx.collections.ObservableList;
public class ComboUI extends BaseUI implements Initializable {
#FXML
private CheckComboBox selector;
#FXML
private ComboBox<String> subAcc;
private List<String> filelist;
//These two functions: print_valuefromcheckcombobox & showDropdownValue added to
//print and add elements in check-combobox list.
public void print_valuefromcheckcombobox() {
ObservableList list = selector.getCheckModel().getCheckedItems();
this.filelist= list;
this.filelist.forEach(name -> {
System.out.println(name);
})
}
public void showDropdownValue () {
//Show Dropdown value: Adding elements in Comboobox
List<String> fileNameList = new ArrayList<>();
fileNameList.add("First");
fileNameList.add("Second");
selector.getItems().setAll(fileNameList);
}
In fxml file, Add where you want to put your combobox. (Just an example..)
<?import org.controlsfx.control.CheckComboBox?>
<ComboBox fx:id="subAcc" layoutX="136.0" layoutY="48.0" onAction="#showDropdownValue" prefWidth="150.0" promptText="Select Sub-Account" />
<CheckComboBox fx:id="selector" layoutX="157.0" layoutY="25.0" prefHeight="25.0" prefWidth="220.0" />
For Maven Project, Add following dependency.
<dependency>
<groupId>org.controlsfx</groupId>
<artifactId>controlsfx</artifactId>
<version>8.40.14</version>
</dependency>
<dependency>
<groupId>org.controlsfx</groupId>
<artifactId>controlsfx-samples</artifactId>
<version>8.40.14</version>
</dependency>
<dependency>
<groupId>org.controlsfx</groupId>
<artifactId>fxsampler</artifactId>
<version>1.0.10</version>
</dependency>