FULL PRODUCT VERSION :


A DESCRIPTION OF THE PROBLEM :
The selection model has information about the current selection:

- getSelectedIndeces
- getSelected Index

If you remove / add Elements, while something is selected in a TreeTableView, the values of getSelectedIndeces and getSelectedIndex are wrong.



REGRESSION. Last worked in version 8u51

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
- select "b" in list
- press add button
- press delete button

Check Syso

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
ADD - Selected Indeces: [2]
ADD - Selected Index: 2
Del - Selected Indeces: [2]
Del - Selected Index: 2

ACTUAL -
ADD - Selected Indeces: [2]
ADD - Selected Index: 2
Del - Selected Indeces: [1, 2]
Del - Selected Index: 1


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
package de.saxsys.jfx.tabellen;


import javafx.application.Application;
import javafx.beans.property.SimpleStringProperty;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.SelectionMode;
import javafx.scene.control.TreeItem;
import javafx.scene.control.TreeTableColumn;
import javafx.scene.control.TreeTableView;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class Starter extends Application {



public static void main(String[] args) {
launch(args);
}

@Override
public void start(Stage stage) throws Exception {

Button deleteButton = new Button("del");
Button addButton = new Button("add");

TreeTableView<String> tv = new TreeTableView<>();

tv.setShowRoot(false);
tv.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);

// ADD DELETE BUG - SELECTED INDECES WRONG
TreeItem<String> value = new TreeItem<>(new String());
tv.setRoot(value);
value.getChildren().addAll(new TreeItem<String>("a"), new TreeItem<String>("b"),
new TreeItem<String>("c"));

TreeTableColumn<String, String> col = new TreeTableColumn<>();
tv.getColumns().addAll(col);
col.setCellValueFactory((c) -> new SimpleStringProperty(c.getValue().getValue()));

VBox vBox = new VBox(addButton, deleteButton, tv);

deleteButton.setOnAction((e) -> {
TreeItem<String> selectedItem = tv.getSelectionModel().getSelectedItem();
tv.getRoot().getChildren().remove(selectedItem);
System.out.println("Del - Selected Indeces: " + tv.getSelectionModel().getSelectedIndices());
System.out.println("Del - Selected Index: " + tv.getSelectionModel().getSelectedIndex());
});

addButton.setOnAction((e) -> {
Integer index = tv.getSelectionModel().getSelectedIndex();
tv.getRoot().getChildren().add(index, new TreeItem<>("NEW"));
System.out.println("ADD - Selected Indeces: " + tv.getSelectionModel().getSelectedIndices());
System.out.println("ADD - Selected Index: " + tv.getSelectionModel().getSelectedIndex());
});

Scene scene = new Scene(vBox);
stage.setScene(scene);
stage.show();
}
}

---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
use getSelectedCells list --> has correct selected elements