Sleur en Pleur

package com.stevenliebregt.test;

import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.geometry.Insets;
import javafx.scene.control.Button;
import javafx.scene.input.ClipboardContent;
import javafx.scene.input.DataFormat;
import javafx.scene.input.Dragboard;
import javafx.scene.input.TransferMode;
import javafx.scene.layout.*;
import javafx.scene.paint.Color;

import java.net.URL;
import java.util.ResourceBundle;

public class GameController implements Initializable
{
    private static final int HAND_SIZE = 7;
    private static final int BOARD_SIZE = 15;

    private static final DataFormat TILE_FORMAT = new DataFormat("Tile");

    @FXML
    private GridPane boardGridPane;

    @FXML
    private GridPane handGridPane;

    private Button draggingTile;

    @Override
    public void initialize(URL location, ResourceBundle resources)
    {
        initializeHand();
        initializeBoard();
    }

    private void initializeHand()
    {
        for (int i = 0; i < HAND_SIZE; i++) {
            StackPane stackPane = new StackPane();
            stackPane.setPrefSize(80, 80);
            stackPane.setBackground(new Background(new BackgroundFill(
                    Color.SALMON,
                    CornerRadii.EMPTY,
                    Insets.EMPTY
            )));

            handGridPane.add(stackPane, i, 0);

            Button tile = new Button();
            tile.setPrefSize(80, 80);
            tile.setText("A");

            tile.setOnDragDetected(event -> {
                Dragboard dragboard = tile.startDragAndDrop(TransferMode.MOVE);
                dragboard.setDragView(tile.snapshot(null, null));

                ClipboardContent clipboardContent = new ClipboardContent();
                clipboardContent.put(TILE_FORMAT, " ");
                dragboard.setContent(clipboardContent);

                draggingTile = tile;
            });

            stackPane.setOnDragOver(event -> {
                Dragboard dragboard = event.getDragboard();

                if (dragboard.hasContent(TILE_FORMAT) && draggingTile != null) {
                    event.acceptTransferModes(TransferMode.MOVE);
                }
            });

            stackPane.setOnDragDropped(event -> {
                // TODO: CHECK IF ALREADY HAS A TILE

                Dragboard dragboard = event.getDragboard();

                if (dragboard.hasContent(TILE_FORMAT)) {
                    ((StackPane) draggingTile.getParent()).getChildren().remove(draggingTile);
                    stackPane.getChildren().add(draggingTile);
                    event.setDropCompleted(true);

                    draggingTile = null;
                }
            });

            stackPane.getChildren().add(tile);
        }
    }

    private void initializeBoard()
    {
        for (int row = 0; row < BOARD_SIZE; row++) {
            for (int column = 0; column < BOARD_SIZE; column++) {
                StackPane stackPane = new StackPane();
                stackPane.prefWidthProperty().bind(boardGridPane.widthProperty().divide(BOARD_SIZE));
                stackPane.prefHeightProperty().bind(boardGridPane.heightProperty().divide(BOARD_SIZE));

                if ((row + column) % 2 == 0) {
                    stackPane.setBackground(new Background(new BackgroundFill(
                            Color.GOLD,
                            CornerRadii.EMPTY,
                            Insets.EMPTY
                    )));
                }

                stackPane.setOnDragOver(event -> {
                    Dragboard dragboard = event.getDragboard();

                    if (dragboard.hasContent(TILE_FORMAT) && draggingTile != null) {
                        event.acceptTransferModes(TransferMode.MOVE);
                    }
                });

                stackPane.setOnDragDropped(event -> {
                    // TODO: CHECK IF ALREADY HAS A CHILD

                    Dragboard dragboard = event.getDragboard();

                    if (dragboard.hasContent(TILE_FORMAT)) {
                        ((StackPane) draggingTile.getParent()).getChildren().remove(draggingTile);
                        stackPane.getChildren().add(draggingTile);
                        event.setDropCompleted(true);

                        draggingTile = null;
                    }
                });

                boardGridPane.add(stackPane, column, row);
            }
        }
    }
}