Resolve "Merge the best from 7.40 branch"

SabrehavenOTClient/modules/game_itemselector/itemselector.lua

@@ -0,0 +1,74 @@
+local activeWindow
+
+function init()
+  g_ui.importStyle('itemselector')
+
+  connect(g_game, { onGameEnd = destroyWindow })
+end
+
+function terminate()
+  disconnect(g_game, { onGameEnd = destroyWindow })
+
+  destroyWindow()
+end
+
+function destroyWindow()
+  if activeWindow then
+    activeWindow:destroy()
+    activeWindow = nil
+  end
+end
+
+function show(itemWidget)
+  if not itemWidget then
+    return
+  end
+  if activeWindow then
+    destroyWindow()
+  end
+  local window = g_ui.createWidget('ItemSelectorWindow', rootWidget)
+  
+  local destroy = function()
+    window:destroy()
+    if window == activeWindow then
+      activeWindow = nil
+    end
+  end
+  local doneFunc = function()
+    itemWidget:setItem(Item.create(window.item:getItemId(), window.item:getItemCount()))
+    destroy()
+  end
+  local clearFunc = function()
+    window.item:setItemId(0)
+    window.item:setItemCount(0)
+    doneFunc()
+  end
+  
+  window.clearButton.onClick = clearFunc
+  window.okButton.onClick = doneFunc
+  window.cancelButton.onClick = destroy
+  window.onEnter = doneFunc
+  window.onEscape = destroy
+  
+  window.item:setItem(Item.create(itemWidget:getItemId(), itemWidget:getItemCount()))
+  
+  window.itemId:setValue(itemWidget:getItemId())
+  if itemWidget:getItemCount() > 1 then
+    window.itemCount:setValue(itemWidget:getItemCount())
+  end
+  
+  window.itemId.onValueChange = function(widget, value)
+    window.item:setItemId(value)
+  end
+  window.itemCount.onValueChange = function(widget, value)
+    window.item:setItemCount(value)
+  end
+  
+  activeWindow = window
+  activeWindow:raise()
+  activeWindow:focus()
+end
+
+function hide()
+  destroyWindow()
+end