Improve HiDPI support and fix 0 item submenus

base.lua

@@ -150,7 +150,7 @@ local function add_item(data,args)
     end
     if (private_data.sub_menu_f  or private_data.sub_menu_m)and data._current_item ~= item then
       local sub_menu = private_data.sub_menu_m or private_data.sub_menu_f()
-      if sub_menu then
+      if sub_menu and sub_menu.rowcount > 0 then
         sub_menu.arrow_type = module.arrow_type.NONE
         sub_menu.parent_item = item
         sub_menu.parent_geometry = data
@@ -365,7 +365,6 @@ local function new(args)
 --         data.style(data,{arrow_x=20,margin=internal.margin})
       else
         data.has_changed = true
-        internal.layout:emit_signal("widget::updated")
       end
     end)
   end

context.lua

@@ -143,7 +143,8 @@ local function setup_drawable(data)
   set_map.height = function(value)
     local margins = data.margins
     local need_update = (internal.w.height ~= (value + margins.top + margins.bottom))
-    internal.w.height = (value + margins.top + margins.bottom) or 1
+    local new_height = (value + margins.top + margins.bottom) or 1
+    internal.w.height = new_height > 0 and new_height or 1
     if need_update then
       data.style(data)
       internal.set_position(data)

layout/vertical.lua

@@ -104,7 +104,6 @@ function module:setup_item(data,item,args)
   data.item_style(data,item,false,false)
   item.widget:set_fg(item._private_data.fg)
   item._internal.has_changed = true
-  data._internal.layout:emit_signal("widget::updated")
 
   --Event handling
   item.widget:connect_signal("mouse::enter", function() item.selected = true end)
@@ -220,7 +219,6 @@ function module:setup_item(data,item,args)
         data._internal.largest_item_w = item
         data._internal.largest_item_w_v = fit_w
       end
-      data._internal.layout:emit_signal("widget::updated")
       --TODO find new largest is item is smaller
   --     if data._internal.largest_item_h_v < fit_h then
   --       data._internal.largest_item_h =item
@@ -231,7 +229,6 @@ function module:setup_item(data,item,args)
   
   item._internal.set_map.f_key = function(value)
     item._internal.has_changed = true
-    data._internal.layout:emit_signal("widget::updated")
     item._internal.f_key = value
     data:remove_key_hook("F"..value)
     data:add_key_hook({}, "F"..value      , "press", function()

widgets/fkey.lua

@@ -13,12 +13,13 @@ local keys = {}
 
 local pango_l,pango_crx,max_width,m_h = nil,nil,0,0
 local function create_pango()
+  local padding = beautiful.menu_height/5
   pango_crx = pangocairo.font_map_get_default():create_context()
   pango_l = pango.Layout.new(pango_crx)
   local desc = pango.FontDescription()
   desc:set_family("Verdana")
   desc:set_weight(pango.Weight.BOLD)
-  desc:set_size((m_h-8) * pango.SCALE)
+  desc:set_size((m_h-padding*2) * pango.SCALE)
   pango_l:set_font_description(desc)
   pango_l.text = "F88"
   max_width = pango_l:get_pixel_extents().width + m_h + 4
@@ -26,6 +27,7 @@ end
 
 local function new(data,item)
   local pref = wibox.widget.textbox()
+  local padding = beautiful.menu_height/5
   pref.draw = function(self,w, cr, width, height)
     local key = item._internal.f_key
     if m_h == 0 then
@@ -45,13 +47,13 @@ local function new(data,item)
       local img = cairo.ImageSurface(cairo.Format.ARGB32, max_width,beautiful.menu_height)
       local cr2 = cairo.Context(img)
       cr2:set_source(color(beautiful.fg_normal))
-      cr2:arc((height-4)/2 + 2, (height-4)/2 + 2, (height-4)/2,0,2*math.pi)
-      cr2:arc(max_width - (height-4)/2 - 2, (height-4)/2 + 2, (height-4)/2,0,2*math.pi)
-      cr2:rectangle((height-4)/2+2,2,max_width - (height),(height-4))
+      cr2:arc((height-padding)/2 + 2, (height-padding)/2 + padding/2, (height-padding)/2,0,2*math.pi)
+      cr2:arc(max_width - (height-padding)/2 - 2, (height-padding)/2 + padding/2, (height-padding)/2,0,2*math.pi)
+      cr2:rectangle((height-padding)/2+2,padding/2,max_width - (height),(height-padding))
       cr2:fill()
-      cr2:select_font_face("Verdana", cairo.FontSlant.NORMAL, cairo.FontWeight.BOLD)
-      cr2:set_font_size(height-6)
-      cr2:move_to(height/2 + 2,1)
+      cr2:select_font_face("Arial", cairo.FontSlant.NORMAL, cairo.FontWeight.BOLD)
+      cr2:set_font_size(height-padding*1.5)
+      cr2:move_to(height/2 + padding/2,padding/4)
       cr2:set_source(color(beautiful.bg_normal))
       local text = (key and key <= 12) and ("F"..(key)) or " ---"
       pango_l.text = text