GroupTools.bringToFront() and sendToBack(). Close #97

projects/flixel-desktop-habit-puzzle-game/source/HabitState.hx

@@ -28,6 +28,7 @@ import HabitModel;
 import hx.strings.Strings;
 import datetime.DateTime;
 using kiss_flixel.CameraTools;
+using kiss_flixel.GroupTools;
 
 import jigsawx.JigsawPiece;
 import jigsawx.Jigsawx;

projects/flixel-desktop-habit-puzzle-game/source/HabitState.kiss

@@ -173,6 +173,11 @@
                         (set s.mouseStartDragCallback
                             ->:Void [s x y]
                                 {
+                                    // Bring currently held pieces to the front:
+                                    (rewardSprites.bringToFront s)
+                                    (doFor connected (recursivelyConnectedPieces s)
+                                        (rewardSprites.bringToFront connected))
+                                    
                                     (set draggingSprite s)
                                     (set draggingLastPos (new FlxPoint s.x s.y))
                                 })

projects/kiss-flixel/src/kiss_flixel/GroupTools.kiss

@@ -1,3 +1,18 @@
+(function :Void clearNulls <>[:FlxObject T] [:FlxTypedGroup<T> group]
+    (while (contains group.members null)
+        (group.members.splice (group.members.lastIndexOf null) 1)))
+
+// Because FlxGroup will fill elements into null gaps in groups, this method inefficiently clears null gaps
+(function :Void bringToFront <>[:FlxObject T] [:FlxTypedGroup<T> group :T obj]
+    (group.remove obj true)
+    (clearNulls group)
+    (group.add obj))
+
+// Because FlxGroup will fill elements into null gaps in groups, this method throws an error when a null gap is present
+(function :Void sendToBack <>[:FlxObject T] [:FlxTypedGroup<T> group :T obj]
+    (group.remove obj true)
+    (group.insert 0 obj))
+
 (function :FlxRect calculateBounds <>[:FlxObject T] [:FlxTypedGroup<T> group &opt :Float margin]
     (unless margin (set margin 0))
     (let [&mut minX 0