widget: emit signals on mouse enter and leave

Signed-off-by: Julien Danjou <julien@danjou.info>

event.c

@@ -350,25 +350,19 @@ event_handle_widget_motionnotify(void *object,
     if(widget != *mouse_over)
     {
         if(*mouse_over)
-        {
-            if((*mouse_over)->mouse_leave)
         {
             /* call mouse leave function on old widget */
             luaA_object_push(globalconf.L, *mouse_over);
-                luaA_object_push_item(globalconf.L, -1, (*mouse_over)->mouse_leave);
-                luaA_dofunction(globalconf.L, 1, 0);
-            }
+            luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
+            lua_pop(globalconf.L, 1);
         }
         if(widget)
         {
-            /* call mouse enter function on new widget and register it */
+            /* emit mouse::enter signal on new widget and register it */
             *mouse_over = widget;
-            if(widget->mouse_enter)
-            {
             luaA_object_push(globalconf.L, widget);
-                luaA_object_push_item(globalconf.L, -1, widget->mouse_enter);
-                luaA_dofunction(globalconf.L, 1, 0);
-            }
+            luaA_object_emit_signal(globalconf.L, -1, "mouse::enter", 0);
+            lua_pop(globalconf.L, 1);
         }
     }
 }
@@ -428,13 +422,10 @@ event_handle_leavenotify(void *data __attribute__ ((unused)),
     {
         if(wibox->mouse_over)
         {
-            if(wibox->mouse_over->mouse_leave)
-            {
-                /* call mouse leave function on widget the mouse was over */
             luaA_object_push(globalconf.L, wibox->mouse_over);
-                luaA_object_push_item(globalconf.L, -1, wibox->mouse_over->mouse_leave);
-                luaA_dofunction(globalconf.L, 1, 0);
-            }
+            /* emit mouse::leave signal on widget the mouse was over */
+            luaA_object_emit_signal(globalconf.L, -1, "mouse::leave", 0);
+            lua_pop(globalconf.L, 1);
             wibox->mouse_over = NULL;
         }
 

lib/awful/menu.lua.in

@@ -202,8 +202,10 @@ local function add_item(data, num, item_info)
 
     item:buttons(bindings)
 
-    function label.mouse_enter() item_enter(data, num, true) end
-    function item.mouse_enter() item_enter(data, num, true) end
+    local mouse_enter_func = function () item_enter(data, num, true) end
+
+    label:add_signal("mouse::enter", mouse_enter_func)
+    item.mouse_enter = mouse_enter_func
 
     -- Create the submenu icon widget
     local submenu
@@ -212,7 +214,7 @@ local function add_item(data, num, item_info)
         submenu.image = data.theme.submenu_icon and image(data.theme.submenu_icon)
         submenu:buttons(bindings)
 
-        function submenu.mouse_enter() item_enter(data, num, true) end
+        submenu:add_signal("mouse::enter", mouse_enter_func)
     end
 
     -- Add widgets to the wibox

lib/awful/widget/button.lua.in

@@ -33,8 +33,10 @@ function new(args)
     local w = capi.widget(args)
     w.image = img_release
     w:buttons(button({}, 1, function () w.image = img_press end, function () w.image = img_release end))
-    function w.mouse_leave(s) w.image = img_release end
-    function w.mouse_enter(s) if capi.mouse.coords().buttons[1] then w.image = img_press end end
+    w:add_signal("mouse::leave", function () w.image = img_release end)
+    w:add_signal("mouse::enter", function ()
+                                     if capi.mouse.coords().buttons[1] then w.image = img_press end
+                                 end)
     return w
 end
 

lib/naughty.lua.in

@@ -319,7 +319,6 @@ function notify(args)
     textbox:buttons(util.table.join(button({ }, 1, run), button({ }, 3, die)))
     textbox:margin({ right = margin, left = margin, bottom = margin, top = margin })
     textbox.text = string.format('<span font_desc="%s"><b>%s</b>%s</span>', font, title, text)
-    if hover_timeout then textbox.mouse_enter = hover_destroy end
 
     -- create iconbox
     local iconbox = nil
@@ -344,7 +343,6 @@ function notify(args)
             end
             iconbox.resize = false
             iconbox.image = img
-            if hover_timeout then iconbox.mouse_enter = hover_destroy end
         end
     end
 
@@ -354,6 +352,8 @@ function notify(args)
                                     border_color = border_color,
                                     border_width = border_width })
 
+    if hover_timeout then notification.box:add_signal("mouse::enter", hover_destroy) end
+
     -- calculate the height
     if not height then
         if iconbox and iconbox:extents().height > textbox:extents().height then

widget.h

@@ -46,8 +46,6 @@ struct widget_t
     int (*index)(lua_State *, awesome_token_t);
     /** Newindex function */
     int (*newindex)(lua_State *, awesome_token_t);
-    /** Mouse over event handler */
-    void *mouse_enter, *mouse_leave;
     /** Misc private data */
     void *data;
     /** Button bindings */