I'm a newcomer when it comes to JavaFX and I recently encountered a problem which really confuses me alot. I'm using a class called "MainController" which controlls an FXML-File containing a TabPane. Each tab is controlled by another controller. But there is one situation in which a tab needs to be deleted, so I need access to the MainController instance to remove the currently active tab from the pane.
Whenever I'm using this code to get an instance of the currently running MainController, I instead get a completely new instance with all of its components set to their default values.
The code is:
FXMLLoader loader = new FXMLLoader(getClass().getResource("Main.fxml"));
loader.load();
MainController controller = loader.getController();
controller.closeCurrentTab();
protected void closeCurrentTab() {
tabPane.getTabs().remove(tabPane.getSelectionModel().getSelectedIndex());
}
I'm currently using a static reference to the controller to access it since it is the only solution that works for me. But I know that this is highly unprofessional and I really want to avoid that.
I hope somebody knows what's wrong here.
You should ensure that you have a reference for your main controller at the point where you want to use it. I guess it is one of the "child" controllers (most probably the controller of the current tab).
Therefore if you would have a property in this class that stores the reference for your main controller, your problem would be solved.
I guess you initialize this "child" controller from the main controller like:
So here you could do:
Where
mainControllerProperty
is defined inTabController
like: