Java Fx - How to populate a combo box with different data [duplicate] - javafx

Question

I have a TableView with two columns named Product and Brand. A Product can be of different Brands. Eg. TV has different brands like Samsung, Sony etc. I am showing Brands of a Product in ComboBoxes.
This is how i am adding a ComboBoxTableCell for my Brand Column.
ObservableList<String> catList = FXCollections.observableArrayList();
categoryCol.setCellFactory(t -> {
ComboBoxTableCell comboCell = new ComboBoxTableCell(catList);
return comboCell;
});
contactTable.getColumns().add(categoryCol);
Now in these ComboBoxes i want to add values of Brands. Since There will be different Products so their Brands will be different also. Eg.
Product | Model
----------------------------------------------
TV | ComboBox[Samsung, Sony, Panasonic]
Monitor | ComboBox[Dell, Microsoft, Apple ]
Now since the ComboBoxes have same data model (ObservableList) how can i add different values to them by selecting the items in table. Is it possible to do ? Thanks in advance for any help.

Answer 1

First of all you need a custom row class in which you store the elements,
then you have to #Override the startEdit() from theComboBoxTreeTableCell for example this way :
#Override public void startEdit() {
MyCustomRow currentRow = getTableRow().getItem();
getItems().setAll(currentRow.getModels());
super.startEdit();
}
}
MyCustomRow:
package mypackage;
import javafx.beans.property.SimpleStringProperty;
import java.util.List;
import java.util.Map;
public class MyCustomRow {
private SimpleStringProperty product;
private SimpleStringProperty model;
private List<String> allModels;
public MyCustomRow(
String product,
String model,
List<String> models) {
this.product = new SimpleStringProperty(product);
this.model = new SimpleStringProperty(product);
this.allModels = models;
}
public String getProduct() {
return product.get();
}
public SimpleStringProperty productProperty() {
return product;
}
public String getModel() {
return model.get();
}
public SimpleStringProperty modelProperty() {
return model;
}
public List<String> getModels() {
return allModels;
}
}
Then in your contoller class you can say:
ObservableList<String> carList = FXCollections.observableArrayList();
categoryCol.setCellFactory(t -> new ComboBoxTableCell(carList){
#Override public void startEdit() {
MyCustomRow currentRow = getTableRow().getItem();
getItems().setAll(currentRow.getModels());
super.startEdit();
}
});
categoryCol.setCellValueFactory(v -> v.getValue().modelProperty());
contactTable.getColumns().add(categoryCol);
So each row you add the appropriate models. So in the ComboBox you will have only those items(models) which belong to the product