How can I do some action when one specific Tab is selected using Javafx

Question

I'm trying to do something when one tab of my tabPane is clicked, I've tried use Action Event but it doesn't work:

public void tabPressClicked (ActionEvent event){
        comboBoxPresYear.setVisible(true);
        lblPresYear.setVisible(true);
    }

[EDITED]

The right way to do that:

tabPresentation.setOnSelectionChanged(new EventHandler<Event>() {
            @Override
            public void handle(Event t) {
                if (tabPresentation.isSelected()) {
                    comboBoxPresYear.setVisible(true);
                    lblPresYear.setVisible(true);
                }
            }
        });

Budde

Answer 1

I'm not sure what you're trying to do/ what ActionEvent you are expecting but try either something like:

tabPane.getSelectionModel().selectedIndexProperty().addListener(new ChangeListener<Number>() {
    @Override
    public void changed(ObservableValue<? extends Number> ov, Number oldValue, Number newValue) {
        // do something...
    }
}); 

if you want to do something when the selection changes (any tab)

or try:

http://docs.oracle.com/javafx/2/api/javafx/scene/control/Tab.html#setOnSelectionChanged%28javafx.event.EventHandler%29

for a specific tab (I haven't tried this yet, though).

Pancho

What I need is when I select a specific tab (tabPress) set one comboBox and one label Visible, just it – Budde

just add if(newValue = yourSpecificTabNUmber) { comboBoxPresYear.setVisible(true); lblPresYear.setVisible(true);} to changed method :) – Jabiru

Did you try Tab.setOnSelectionChanged I mentioned? – Pancho

Answer 2

You do that with the selectedItemProperty or selectedIndexProperty like Puce was saying. Here the solution with the selectedItemProperty which I think is better because you get the selected Tab item itself

tabPane.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<Tab>() {

    @Override
    public void changed(ObservableValue<? extends Tab> observable, Tab oldTab, Tab newTab) {
        if(newTab == tabPresentation) {
            comboBoxPresYear.setVisible(true);
            lblPresYear.setVisible(true);}
        }
    });

I assume the tabPresentation is the Tab object itself.

Kathlenekathlin

This is really nice, because I get the tab item directly and don't need to refer to a specific tab number, which might change. – Sensuous

Answer 3

Wouldn't this be the easiest way to do it

    tab.selectedProperty().addListener((observable, oldValue, newValue) -> {
        if (newValue) {
            comboBoxPresYear.setVisible(true);
            lblPresYear.setVisible(true);}
        }
    });

Skindeep

That's a great JavaFX8 solution – Chaker

Answer 4

import javafx.event.Event; import javafx.event.EventHandler;

    tab1.setOnSelectionChanged((EventHandler<Event>) t -> {
        if (tab1.isSelected()) {
            System.out.println(tab1.getText() + " is selected");
        }
    });

Wilder