optimize adding additional jigsaw sprites

src/kiss_flixel/DragToSelectPlugin.hx

@@ -29,6 +29,19 @@ class DragToSelectPlugin extends FlxBasic {
         super();
     }
 
+    public function clearEnabledSprites(?state:FlxState) {
+        if (state == null) state = FlxG.state;
+        dragStates[state].enabledSprites = [];
+        dragStates[state].selectedSprites = [];
+    }
+
+    // Don't use this on a whole list of sprites! It will be O(N^2)
+    public function disableSprite(s: KissExtendedSprite, ?state:FlxState) {
+        if (state == null) state = FlxG.state;
+        dragStates[state].enabledSprites.remove(s);
+        dragStates[state].selectedSprites.remove(s);
+    }
+
     public function enableSprite(s:KissExtendedSprite, ?state:FlxState, ?camera:FlxCamera) {
         if (state == null) state = FlxG.state;
         if (camera == null) camera = FlxG.camera;

src/kiss_flixel/KissExtendedSprite.hx

@@ -115,8 +115,19 @@ class KissExtendedSprite extends flixel.addons.display.FlxExtendedSprite {
         plugin.enableSprite(this, state, thisCamera());
         _dragToSelectEnabled = true;
     }
+    public function disableDragToSelect(?state:FlxState) {
+        var plugin = FlxG.plugins.get(DragToSelectPlugin); 
+        plugin.disableSprite(this, state);
+        _dragToSelectEnabled = false;
+    }
 
-    override function update(elapsed:Float) {
+    public override function destroy() {
+        if (_dragToSelectEnabled)
+            disableDragToSelect();
+        super.destroy();
+    }
+
+    public override function update(elapsed:Float) {
         #if debug
         // color = (mouseOver && pixelPerfect(_dragPixelPerfectAlpha)) ? FlxColor.LIME : FlxColor.WHITE;
         #end