fixed movement bug + move args to setSize() optional

.gitignore

@@ -0,0 +1 @@
+busted/

pop/elements/element.lua

@@ -20,9 +20,9 @@ function element:move(x, y)
     self.x = self.x + x
     self.y = self.y + y
 
-    for i=1,#element.child do
+    for i=1,#self.child do
-        if not element.child[i].excludeMovement then
+        if not self.child[i].excludeMovement then
-            element.child[i]:move(x - oldX, y - oldY)
+            self.child[i]:move(x - oldX, y - oldY)
         end
     end
 
@@ -49,9 +49,9 @@ function element:setPosition(x, y)
         self.y = y - self.h
     end
 
-    for i=1,#element.child do
+    for i=1,#self.child do
-        if not element.child[i].excludeMovement then
+        if not self.child[i].excludeMovement then
-            element.child[i]:move(x - oldX, y - oldY)
+            self.child[i]:move(x - oldX, y - oldY)
         end
     end
 
@@ -78,20 +78,23 @@ function element:getPosition()
 end
 
 function element:setSize(w, h)
+    if w then
         if self.horizontal == "center" then
             self.x = self.x - (w - self.w)/2
         elseif self.horizontal == "right" then
             self.x = self.x - (w - self.w)
         end
+        self.w = w
+    end
 
+    if h then
         if self.vertical == "center" then
             self.y = self.y - (h - self.h)/2
         elseif self.vertical == "bottom" then
             self.y = self.y - (h - self.h)
         end
-
-    self.w = w
         self.h = h
+    end
 
     return self
 end