Client.java

package com.discrypto.client;

import com.discrypto.client.screens.Screen;
import com.discrypto.client.screens.main.MainScreen;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.stage.Stage;

import java.io.IOException;
import java.net.URL;

public class Client extends Application {

    public static void main(String[] args) {
        launch();
    }

    @Override
    public void start(Stage stage) throws Exception {
        MainScreen main = new MainScreen();
        main.stage = stage;
        openScreen(main);
    }

    public static Scene loadScene(String fxmlName) {
        return loadScene(fxmlName, null);
    }

    public static Scene loadScene(String fxmlName, Object controller) {
        try {
            FXMLLoader fxmlLoader = new FXMLLoader(getResource(fxmlName + ".fxml"));
            if(controller != null)
                fxmlLoader.setController(controller);
            return new Scene(fxmlLoader.load());
        } catch(IOException e) {
            throw new RuntimeException(e);
        }
    }

    public static void openScreen(Screen<?> screen) {
        if(screen.stage == null)
            screen.stage = new Stage();

        screen.stage.setTitle(screen.title);
        screen.stage.setScene(loadScene(screen.sceneName, screen.controller));

        screen.beforeShow();

        screen.stage.show();

        screen.afterShow();
    }

    public static URL getResource(String name) {
        return Client.class.getResource(name);
    }

}