Edit item in JavaFX TreeView - javafx

Question

I have this custom TreeView code:
treeView.setCellFactory(new Callback<TreeView<Tree>, TreeCell<Tree>>()
{
#Override
public TreeCell<Tree> call(TreeView<Tree> treeView)
{
final TreeCell<Tree> cell = new TreeCell<Tree>()
{
#Override
protected void updateItem(Tree item, boolean empty)
{
super.updateItem(item, empty);
if (!empty)
{
setText(item != null ? item.toString() : "");
setGraphic(createImageView(item));
setContextMenu(createContextMenuTreeItem(item));
}
else
{
setText(null);
setGraphic(null);
setContextMenu(null);
}
}
};
return cell;
}
});
I would like to be able to rename the nodes of the tree using Content Menu. Can you help me to implement this?

Answer 1

You could simply start the editing of a tree node in MenuItem's EventHandler. Here is an example code that allow the basic editing by double clicking(I didn't try to alter/prevent that) and also from the context menu:
import javafx.application.Application;
import javafx.event.*;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.TextFieldTreeCell;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.*;
import javafx.util.converter.DefaultStringConverter;
public class TreeViewSample extends Application {
public static void main(String[] args) {
launch(args);
}
#Override
public void start(Stage primaryStage) {
primaryStage.setTitle("Tree View Sample");
TreeItem<String> rootItem = new TreeItem<String> ("Tree");
rootItem.setExpanded(true);
for (int i = 1; i < 6; i++) {
TreeItem<String> item = new TreeItem<String> ("Item" + i);
rootItem.getChildren().add(item);
}
TreeView<String> tree = new TreeView<String> (rootItem);
tree.setEditable(true);
tree.setCellFactory(new Callback<TreeView<String>,TreeCell<String>>(){
#Override
public TreeCell<String> call(TreeView<String> p) {
return new RenameMenuTreeCell();
}
});
StackPane root = new StackPane();
root.getChildren().add(tree);
primaryStage.setScene(new Scene(root, 300, 250));
primaryStage.show();
}
private static class RenameMenuTreeCell extends TextFieldTreeCell<String> {
private ContextMenu menu = new ContextMenu();
public RenameMenuTreeCell() {
super(new DefaultStringConverter());
MenuItem renameItem = new MenuItem("Rename");
menu.getItems().add(renameItem);
renameItem.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent arg0) {
startEdit();
}
});
}
#Override
public void updateItem(String item, boolean empty) {
super.updateItem(item, empty);
if (!isEditing()) {
setContextMenu(menu);
}
}
}
}
This is basically Oracle's example 13-1 with custom tree cells.