Get the contents of selected textfield in JavaFX - javafx-2

Question

I have a number of TextFields on my UI screen and on click of a button I want to get the contents of selected textfield.I am using JavaFX and isFocused() method is not working

Answer 1

The focus is moved to the Button before the EventHandler runs. This means the TextField is no longer focused at the time the EventHandler checks the property.
You could listen to the focusOwner property of the Scene though and save the last Node focused:
private static class FocusData {
private TextField textField = null;
public TextField getTextField() {
return textField;
}
public void setFocusedNode(Node node) {
this.textField = node instanceof TextField ? (TextField) node : null;
}
public boolean isTextField() {
return textField != null;
}
}
#Override
public void start(Stage primaryStage) {
final FocusData focusData = new FocusData();
Button btn = new Button("Print Text");
btn.setOnAction(new EventHandler<ActionEvent>() {
#Override
public void handle(ActionEvent event) {
if (focusData.isTextField()) {
System.out.println(focusData.getTextField().getText());
}
}
});
VBox root = new VBox();
for (int i = 0; i < 5; i++) {
root.getChildren().add(new TextField());
}
Scene scene = new Scene(root);
scene.focusOwnerProperty().addListener(new ChangeListener<Node>() {
#Override
public void changed(ObservableValue<? extends Node> observable, Node oldValue, Node newValue) {
focusData.setFocusedNode(oldValue);
}
});
root.getChildren().add(btn);
primaryStage.setScene(scene);
primaryStage.show();
}
If you're using a fxml you can get access to the scene by adding a listener to the scene property of some node in the initialize method and add/remove the listener in that listener.
root is some node in the following code snippet:
final ChangeListener<Node> listener = new ChangeListener<Node>() {
#Override
public void changed(ObservableValue<? extends Node> observable, Node oldValue, Node newValue) {
focusData.setFocusedNode(oldValue);
}
};
if (root.getScene() != null) {
root.getScene().focusOwnerProperty().addListener(listener);
}
root.sceneProperty().addListener(new ChangeListener<Scene>() {
public void changed(ObservableValue<? extends Scene> observable, Scene oldValue, Scene newValue) {
if (oldValue != null) {
oldValue.focusOwnerProperty().removeListener(listener);
}
if (newValue != null) {
newValue.focusOwnerProperty().addListener(listener);
}
listener.changed(null, null, null);
}
});