JavaFX Check Cell background of specific Cell (random access) - indexing

Question

I just started to develop a JavaFX application. Maybe I didn't get how JavaFX uses the TableView and I should use something different instead.
Currently my TableView displays data in multiple columns an when I double-click a cell the background color changes (by setCellFactory(customFactory)).
Now I want to access different cells of the table by using indices (column,row) and checking the background color.
The cells with a changed background color should be stored after a certain button was clicked.
I would like to get every cell with changed background(get celltext) for each row and store this for later use in a data structure like a Map>.
Would be really nice if somebody can give me a hint. Thank for your Help.

Answer 1

I suppose, you are adding an EventHandler to the TableCell, which is returned by your customFactory. This EventHandler is handling the doubleclick-event and sets the background color, right?
This handler has access to the parameter which is passed to the Callbacks/CustomFactories call-method, which contains the model-bean of the current row. You could set a flag or the columns name in that model-bean when a doubleClickEvent occurs.
Then
after a certain button was clicked
you can get your info, by checking the tables items. The row-index of each item is equivalent to the index of this item in the List of TableView#getItems
Also have a look at http://controlsfx.bitbucket.org/org/controlsfx/control/spreadsheet/SpreadsheetView.html if you need more TableFunctions.
EDITED
This is a code-example:
The Model-Bean used in TableView:
class Model {
private String propertyA;
private String propertyB;
#lombok.Getter
private Set<String> propertiesClicked = new HashSet<>();
The javafx-controls, annotate them with #FXML if you use FXMLs:
private TableView<Model> tableView;
private TableColumn<Model, String> propertyAColumn;
private TableColumn<Model, String> propertyBColumn;
and the the CellFactory. Create a more generic CellFactory if you need it for multiple columns:
propertyAColumn.setCellFactory((value) -> {
TableCell<Model, String> tableCell = new TableCell<Model, String>() {
//Override the Methods which you need
};
tableCell.setOnMouseClicked((mouseEvent) -> {
if (mouseEvent.getButton().equals(MouseButton.PRIMARY)) {
if (mouseEvent.getClickCount() == 2 && !tableCell.getStyleClass().contains("buttonClicked")) {
tableCell.getStyleClass().add("buttonClicked");
tableView.getSelectionModel().getSelectedItem().getPropertiesClicked().add("propertyA");
}
}
});
return tableCell;
});