optimizations and bug fixes on npc trade

modules/game_npctrade/npctrade.lua

@@ -52,6 +52,7 @@ function NPCTrade.init()
   radioTabs:addWidget(buyTab)
   radioTabs:addWidget(sellTab)
   radioTabs:selectWidget(buyTab)
+  radioTabs.onSelectionChange = NPCTrade.setList
   
   connect(g_game, { onOpenNpcTrade = NPCTrade.onOpenNpcTrade,
                     onPlayerGoods = NPCTrade.onPlayerGoods,
@@ -99,9 +100,11 @@ function NPCTrade.hide()
   npcWindow:hide()
 end
 
-function NPCTrade.setList(widget, checked)
-  setupButton:setText(widget:getText())
-  widget:setOn(checked)
+function NPCTrade.setList(radioTabs, selected, deselected) 
+  print("PASSO SETLIST")
+  setupButton:setText(selected:getText())
+  selected:setOn(true)
+  deselected:setOn(false)
   NPCTrade.createItemsOnPanel()
   
   NPCTrade.resetSetup()
@@ -224,12 +227,12 @@ function NPCTrade.itemPopup(self, mousePosition, mouseButton)
   end
 end
 
-function NPCTrade.createItemsOnPanel()
-  NPCTrade.resetSetup()
-  
+function NPCTrade.createItemsOnPanel()  
   local layout = itemsPanel:getLayout()
   layout:disableUpdates()
   
+  NPCTrade.resetSetup()
+  
   offerSelected = nil
   itemsPanel:destroyChildren()
 

modules/game_npctrade/npctrade.otui

@@ -64,12 +64,13 @@ MainWindow
     id: buyTab
     tooltip: List of items that you're able to buy
     text: Buy
+    checked: true
+    on: true
     anchors.left: parent.left
     anchors.right: parent.horizontalCenter
     anchors.top: parent.top
     margin-right: 5
     margin-top: 5
-    @onCheckChange: NPCTrade.setList(self, self:isChecked())
 
   TabButton
     id: sellTab
@@ -80,7 +81,6 @@ MainWindow
     anchors.top: parent.top
     margin-left: 5
     margin-top: 5
-    @onCheckChange: NPCTrade.setList(self, self:isChecked())
     
   Label
     id: searchLabel