Con

package sample;

import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.*;
import javafx.scene.control.*;



public class Controller {

    //Main panes
    public BorderPane bpMainPane;
    public GridPane gpCenterPane;

    //Top horizontal box pane
    public HBox hbTop;

    //Buttons
    public Button btnSetSize;
    public Button btnControl;

    //Top objects
    public Label lblTop;
    public TextField tfSize;

    //Maze Size (NxN)
    private int mazeSize;

    //Current player position
    private int pos_x;
    private int pos_y;

    //Step Counter
    private int stepCount;

    //Controller for Search algorithm
    private SearchController search;

    /**
     * Button action for btnSetSize. Set maze size, create maze, then move top scene.
     */
    public void setButtonAction()
    {
        mazeSize = Integer.parseInt(tfSize.getText());
        createMaze();
        wallsMakeScene();
    }

    /**
     * Creates individual Cells then adds to the gridPane.
     */
    private void createMaze()
    {
        for(int i = 0; i < mazeSize; i++)
            for(int z = 0; z < mazeSize; z++)
            {
                Cell cell = new Cell(i , z, mazeSize);
                gpCenterPane.add(cell, i, z);
            }

        //Initialize x, y, step counter
        pos_x = 0;
        pos_y = 0;
        stepCount = 0;
    }

    /**
     * Set top objects to fit wall making scene
     */
    public void wallsMakeScene()
    {
        //Remove text field and set size button
        hbTop.getChildren().remove(tfSize);
        hbTop.getChildren().remove(btnSetSize);

        //Set new text and show new button
        lblTop.setText("Choose Walls");
        btnControl.setVisible(true);
    }

    /**
     * Gets Cell object from certain index at GridPane
     * @param row x index of Cell object
     * @param col y index of Cell object
     * @return Cell object found with specified row col index
     */
    private Cell getCellAtIndex(int row, int col)
    {
        Node cell = null;
        for(Node node : gpCenterPane.getChildren())
            if(gpCenterPane.getRowIndex(node) == row && gpCenterPane.getColumnIndex(node) == col)
            {
                cell = node;
                break;
            }

        return (Cell)cell;
    }

    /**
     * Moves player from one Cell to another
     */
    public void move()
    {
        //Get next Cell of player
        Cell destination = search.getNextMove();

        if(destination != null)
            destination.addPlayer();

        pos_x = destination.getX();
        pos_y = destination.getY();

        stepCount++;
        lblTop.setText("Step Counter: " + stepCount);
    }

    /**
     * Disables mouse click events for each Cell in the grid.
     * Then sets up text and button to start the simulation.
     */
    public void saveMaze()
    {
        //Retrieves Cells from grid.
        ObservableList<Node> maze = gpCenterPane.getChildren();

        for(int i = 0; i < Math.pow(mazeSize, 2); i++)
        {
            Cell cell = (Cell)maze.get(i);
            cell.removeMouseClick();
        }

        lblTop.setText("Step Counter: " + stepCount);
        btnControl.setText("Move");

        //Set button new action when clicked
        btnControl.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent actionEvent) {
                move();
            }
        });

        search = new SearchController(gpCenterPane);

    }

}