Thread: How do I pass an object from a button in another gui back to the main gui?

Hi all, I have just started learning JavaFX and I have some questions.

Hi everyone, I have 2 GUIs, main and edit gui, in which I am trying to pass this Person object from the edit gui to the main gui.

In my main gui, it has this Edit Person button, which calls for the edit gui as follows:

public class EditGui 
{
    private static Stage window;
    private static Person currentPers;
    private static Button saveBtn;
 
    public static void display(String msg, Person persObj)
    {
        currentPers = persObj;
 
        // Creation of the GUI elements
        saveBtn = new Button("Save");
        ...
        ...
 
        setEventHandler();
        Scene scene = new Scene(gridPane);
        window.setScene(scene);
        window.setResizable(false);
        window.showAndWait();
    }
 
    private static void setEventHandler()
    {
        saveBtn.setOnAction(evt -> saveMemberInfo());
    }
 
    private static Person saveMemberInfo()
    {
        Person tempNew = new Person(firstnameTxt.getText());
 
        if (tempNew.isEqual(currentPers))
        {
            System.out.println("No changes found. Nothing to save.");
            tempNew = currentPers;
        }
 
        return tempNew;
    }
}

In my main gui/ code, the code used is:

Person pObj = EditGui.display(getSelectedTreeItemName(), getSelectedTreeItemPersonObj());

I am attempting to return the Person object from Edit gui back to main code and that results an error since display() return type is void but I had thought that since the action stems from the save button, should the end product not comes from there?

Even so, based on the above code,

1. Is it a good idea to split up the event-handling? (See setEventHandler() in my edit gui) I split them up, thinking it will help facilitate my understanding and troubleshooting?
2. How can I go about resolving the issue such that when Save button is clicked upon, the Person object will be passed back to the main gui?

Originally Posted by Norm

Too many static variables and methods. The first changes to the code needs to be to remove all uses of static except for the main method.

Hi, noted on that. I used static variables as I am following from some code that I saw online. While I can remove the use of 'static' , any insights towards my question 1 and 2?

You're on the right track with splitting up event handling for clarity. To pass the Person object back to the main GUI when the Save button is clicked, you can utilize callbacks or event listeners.

Callbacks: Think of callbacks like phone calls. You tell the Edit GUI, "Hey, when you're done, call me back and give me the Person object." So, when the Save button is clicked, the Edit GUI will call a method in the main GUI and pass the Person object to it.

Event Listeners: Imagine the Save button saying, "Hey, I've been clicked!" You can set up the main GUI to listen for this event. When the Save button is clicked, the main GUI will be notified, and you can pass the Person object from the Edit GUI to the main GUI.

Reach out to us for expert support and elevate your JavaFX skills today at https://www.programminghomeworkhelp....va-assignment/