JavaFX retrieve TableCells of selected row - javafx

Question

In my JavaFX TableView, I am trying to retrieve TableCells from a selected row to mark them
with custom colors.
Simply changing the colors of the entire row does not work in this case, as I use different color shadings in each cell depending
on the value of each cell
The example below shows two approaches I tried I to solve the problem
1) Use a listener to retrieve cells in the selected row. Printing the row index and content already works
However, I could not find how to retrieve a TableCell from table.getSelectionModel().
2) Try a dirty workaround to add the TableCells to a global data structure in the columnCellFactory.
However, the TableCells do not get added to the tableCells ArrayList for some reason.
To obtain a short example, the imports and the Classes defining the EditingCell (custom TableCell) and CellEditEvent were omitted.
package TableViewColExample;
public class TableViewExample extends Application {
private Callback<TableColumn, TableCell> columnCellFactory ;
final TableView<String[]> table = new TableView<String[]>();
ObservableSet<Integer> selectedRowIndexes = FXCollections.observableSet();
ObservableSet<String> selectedRows = FXCollections.observableSet();
ArrayList<ArrayList<EditingCell>> tableColumns = new ArrayList<ArrayList<EditingCell>>();
#Override
public void start(Stage stage) {
String[][] dat = new String[][]{
{"C1","C2","C3"},{"a","b","c"},{"d","e","f"},{"g","i","h"}};
ObservableList<String []> data = FXCollections.observableArrayList();
data.addAll(Arrays.asList(dat));
data.remove(0);
table.setItems(data);
for (int i = 0; i < dat[0].length; i++) {
TableColumn tc = new TableColumn(dat[0][i]);
final int colNo = i;
tc.setCellValueFactory(new Callback<CellDataFeatures<String[], String>, ObservableValue<String>>() {
public ObservableValue<String> call(CellDataFeatures<String[], String> p) {
return new SimpleStringProperty((p.getValue()[colNo]));
}
});
ArrayList<EditingCell> tableCells = new ArrayList<EditingCell>();
columnCellFactory =
new Callback<TableColumn, TableCell>() {
public TableCell call(TableColumn p) {
EditingCell tcell = new EditingCell();
//For some reason, the EditingCell is never added to the list
tableCells.add(tcell);
return tcell;
}
};
tc.setCellFactory(columnCellFactory);
tableColumns.add(tableCells);
//The printed value here is 0, which means that the Factory does not add the Editing Cell to the List
System.out.println(" Column rows "+tableCells.size());
table.getColumns().add(tc);
}
//Output: TableColumns 3, TableRows 0
System.out.println("TableColumns "+ tableColumns.size() + " Table rows "+tableColumns.get(0).size());
table.setItems(data);
table.getSelectionModel().getSelectedCells().addListener((Change<? extends TablePosition> change) -> {
selectedRows.clear();
table.getSelectionModel().getSelectedCells().stream().map(TablePosition::getRow).f orEach(row -> {
selectedRowIndexes.add(row);
System.out.println(selectedRowIndexes.toString());
});
table.getSelectionModel().getSelectedItems().forEach(row -> {
selectedRows.add(Arrays.toString(row));
System.out.println(selectedRows.toString());
});
});
stage.setScene(new Scene(table));
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}