How to create tableview with dynamically generated columns of different types?

Question

I am developing a program for accounting attendance of students. I need a table with the first column - a list of students (TableColumn) and the next columns I generate dynamically (list of lectures). At the intersection of a row and column - ComboBox. I found how to make dynamic generation of of columns for one type (TableView>>), but not found a solution for my case. I had an idea to create an additional class

class Row{
    StringProperty audience;
    ObservableList<Attendence> lectures;
}

but do not understand how to implement it. How to solve this problem??

James_D · Accepted Answer · 2017-05-27 19:42:03Z

Your idea is basically the correct one:

public class Row{
    private final StringProperty audience = new SimpleStringProperty();
    private final List<ObjectProperty<Attendance>> lectures = new ArrayList<>();

    public Row(String audience, int numAttendances) {
        setAudience(audience);
        for (int i = 0 ; i < numAttendances ; i++) {
            lectures.add(new SimpleObjectProperty<>());
        }
    }

    public List<ObjectProperty<Attendance>> getLectures() {
        return lectures ;
    }

    public StringProperty audienceProperty() { 
        return audience ;
    }

    public final String getAudience() {
        return audienceProperty().get();
    }

    public final void setAudience(String audience) {
        audienceProperty().set(audience);
    }
}

Now you can set your table up as follows:

int numLectures = ... ;
TableView<Row> table = new TableView<>();
TableColumn<Row, String> audienceCol = new TableColumn<>("Audience");
audienceCol.setCellValueFactory(cellData -> cellData.getValue().audienceProperty());
table.getColumns().add(audienceCol);
for (int i = 0 ; i < numLectures ; i++) {
    TableColumn<Row, Attendance> col = new TableColumn<>("Attendance "+ (i+1));
    final int colIndex = i ;
    col.setCellValueFactory(cellData -> cellData.getValue().getLectures().get(colIndex));
    table.getColumns().add(col);
}

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