move reflow to widgets

luigi/input.lua

@@ -144,10 +144,7 @@ end
 function Input:handleReshape (width, height)
     local layout = self.layout
     local root = layout.root
-    for i, widget in ipairs(layout.widgets) do
-        widget.position = {}
-        widget.dimensions = {}
-    end
+    layout.root:reflow()
     root.width = width
     root.height = height
     Event.Reshape:emit(root, {

luigi/layout.lua

@@ -61,14 +61,6 @@ function Layout:hide ()
     self:unhook()
 end
 
--- Reflow the layout. Call this after you change widget positions/dimensions.
-function Layout:reflow (reshape)
-    for i, widget in ipairs(self.widgets) do
-        widget.position = {}
-        widget.dimensions = {}
-    end
-end
-
 -- Get the innermost widget at a position, within a root widget.
 -- Should always return a widget since all positions are within
 -- the layout's root widget.

luigi/widget.lua

@@ -232,12 +232,12 @@ function Widget:getAncestors (includeSelf)
     end
 end
 
+-- Reflow the widget. Call this after changing position/dimensions.
 function Widget:reflow ()
     self.position = {}
     self.dimensions = {}
     for i, widget in ipairs(self.children) do
-        widget.position = {}
-        widget.dimensions = {}
+        widget:reflow()
     end
 end