Fixed #12 #28 #51 issues

modules/game_interface/gameinterface.lua

@@ -179,9 +179,9 @@ function onUseWith(clickedWidget, mousePosition)
     local tile = clickedWidget:getTile(mousePosition)
     if tile then
       g_game.useWith(selectedThing, tile:getTopMultiUseThing())
-    elseif clickedWidget:getClassName() == 'UIItem' and not clickedWidget:isVirtual() then
-      g_game.useWith(selectedThing, clickedWidget:getItem())
     end
+  elseif clickedWidget:getClassName() == 'UIItem' and not clickedWidget:isVirtual() then
+    g_game.useWith(selectedThing, clickedWidget:getItem())
   end
 end
 

modules/game_interface/widgets/uigamemap.lua

@@ -7,7 +7,6 @@ function UIGameMap.create()
   return gameMap
 end
 
-
 function UIGameMap:onDragEnter(mousePos)
   local tile = self:getTile(mousePos)
   if not tile then return false end
@@ -28,7 +27,7 @@ function UIGameMap:onDragLeave(droppedWidget, mousePos)
 end
 
 function UIGameMap:onDrop(widget, mousePos)
-  if not widget or not widget.currentDragThing then return false end
+  if not self:canAcceptDrop(widget, mousePos) then return false end
 
   local tile = self:getTile(mousePos)
   if not tile then return false end
@@ -82,3 +81,20 @@ function UIGameMap:onMouseRelease(mousePosition, mouseButton)
 
   return ret
 end
+
+function UIGameMap:canAcceptDrop(widget, mousePos)
+  if not widget or not widget.currentDragThing then return false end
+
+  local children = rootWidget:recursiveGetChildrenByPos(mousePos)
+  for i=1,#children do
+    local child = children[i]
+    if child == self then
+      return true
+    elseif not child:isPhantom() then
+      return false
+    end
+  end
+
+  error('Widget ' .. self:getId() .. ' not in drop list.')
+  return false
+end

modules/game_interface/widgets/uiitem.lua

@@ -20,9 +20,7 @@ function UIItem:onDragLeave(droppedWidget, mousePos)
 end
 
 function UIItem:onDrop(widget, mousePos)
-  if self:isVirtual() then return false end
-
-  if not widget or not widget.currentDragThing then return false end
+  if not self:canAcceptDrop(widget, mousePos) then return false end
 
   local item = widget.currentDragThing
   if not item:isItem() then return false end
@@ -94,3 +92,20 @@ function UIItem:onMouseRelease(mousePosition, mouseButton)
   return false
 end
 
+function UIItem:canAcceptDrop(widget, mousePos)
+  if self:isVirtual() then return false end
+  if not widget or not widget.currentDragThing then return false end
+
+  local children = rootWidget:recursiveGetChildrenByPos(mousePos)
+  for i=1,#children do
+    local child = children[i]
+    if child == self then
+      return true
+    elseif not child:isPhantom() then
+      return false
+    end
+  end
+
+  error('Widget ' .. self:getId() .. ' not in drop list.')
+  return false
+end