27 lines
672 B
Dart
27 lines
672 B
Dart
import 'package:flutter/material.dart';
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import 'board.dart';
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import 'tile.dart';
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class SwapNotifier extends ChangeNotifier {
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Tile? selectedTile;
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void selectTile(Tile tile, Board board) {
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if (selectedTile == null) {
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selectedTile = tile;
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} else {
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if (_isNeighbor(selectedTile!, tile)) {
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board.swapTiles(selectedTile!, tile);
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selectedTile = null;
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} else {
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selectedTile = tile;
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}
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}
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notifyListeners();
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}
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bool _isNeighbor(Tile tile1, Tile tile2) {
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return (tile1.row == tile2.row && (tile1.col - tile2.col).abs() == 1) ||
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(tile1.col == tile2.col && (tile1.row - tile2.row).abs() == 1);
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}
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}
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