widgets: Add some constructor arguments

This saves space when constructing widgets, because some common cases can now be
done in a single line of code.

Signed-off-by: Uli Schlachter <psychon@znc.in>

lib/wibox/widget/background.lua.in

@@ -94,7 +94,7 @@ function background:set_bgimage(image)
     self._emit_updated()
 end
 
-local function new()
+local function new(widget)
     local ret = base.make_widget()
 
     for k, v in pairs(background) do
@@ -107,6 +107,8 @@ local function new()
         ret:emit_signal("widget::updated")
     end
 
+    ret:set_widget(widget)
+
     return ret
 end
 

lib/wibox/widget/imagebox.lua.in

@@ -108,7 +108,10 @@ function imagebox:set_resize(allowed)
 end
 
 -- Returns a new imagebox
-local function new()
+-- @param image the image to display, may be nil
+-- @param resize_allowed If false, the image will be clipped, else it will be resized
+--                       to fit into the available space.
+local function new(image, resize_allowed)
     local ret = base.make_widget()
 
     for k, v in pairs(imagebox) do
@@ -117,6 +120,13 @@ local function new()
         end
     end
 
+    if image then
+        ret:set_image(image)
+    end
+    if resize_allowed ~= nil then
+        ret:set_resize(resize_allowed)
+    end
+
     return ret
 end
 

lib/wibox/widget/textbox.lua.in

@@ -115,7 +115,7 @@ function textbox:set_font(font)
 end
 
 -- Returns a new textbox
-local function new()
+local function new(text, ignore_markup)
     local ret = base.make_widget()
 
     for k, v in pairs(textbox) do
@@ -133,6 +133,14 @@ local function new()
     ret:set_align("left")
     ret:set_font()
 
+    if text then
+        if ignore_markup then
+            ret:set_text(text)
+        else
+            ret:set_markup(text)
+        end
+    end
+
     return ret
 end