Remember to commit KissExtendedSprite

projects/kiss-flixel/src/kiss_flixel/KissExtendedSprite.hx

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+package kiss_flixel;
+
+import flixel.FlxG;
+import flixel.FlxSprite;
+import flixel.math.FlxPoint;
+import flixel.system.FlxAssets;
+
+class KissExtendedSprite extends flixel.addons.display.FlxExtendedSprite {
+    public function new(X:Float = 0, Y:Float = 0, ?SimpleGraphic:FlxGraphicAsset)
+	{
+		super(X, Y, SimpleGraphic);
+	}
+
+    var dragStartPos:FlxPoint = null;
+    var mouseStartPos:FlxPoint = null;
+    
+    public var connectedSprites:Array<KissExtendedSprite> = [];
+    var connectedSpritesStartPos:Array<FlxPoint> = [];
+
+    public override function startDrag() {
+        super.startDrag();
+
+        dragStartPos = new FlxPoint(x, y);
+        connectedSpritesStartPos = [for (s in connectedSprites) new FlxPoint(s.x, s.y)];
+        mouseStartPos = FlxG.mouse.getWorldPosition();
+    }
+
+    override function updateDrag() {
+        var mouseTotalMovement = FlxG.mouse.getWorldPosition().subtractPoint(mouseStartPos);
+        var nextPos = dragStartPos.copyTo().addPoint(mouseTotalMovement);
+        x = nextPos.x;
+        y = nextPos.y;
+        for (i in 0...connectedSprites.length) {
+            var sprite = connectedSprites[i];
+            var startPos = connectedSpritesStartPos[i];
+            var nextPos = startPos.copyTo().addPoint(mouseTotalMovement);
+            sprite.x = nextPos.x;
+            sprite.y = nextPos.y;
+        }
+    }
+}