init move items

modules/core_widgets/uiitem.lua

@@ -1,3 +1,29 @@
+function UIItem:onDragEnter(mousePos)
+  local item = self:getItem()
+  if not item then return false end
+  
+  self.currentDragThing = item
+  setTargetCursor()
+  return true
+end
+
+function UIItem:onDragLeave(widget, mousePos)
+  self.currentDragThing = nil
+  restoreCursor()
+  return true
+end
+
+function UIItem:onDrop(widget, mousePos)
+  if not widget or not widget.currentDragThing then return false end
+  
+  local pos = self.position
+  local count = 1 -- todo make a window for it
+  
+  Game.move(widget.currentDragThing, pos, count)
+  return true
+end
+
+
 function UIItem:onMouseRelease(mousePosition, mouseButton)
   local item = self:getItem()
   if not item or not self:containsPoint(mousePosition) then return false end