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---------------------------------------------------------------------------
-- @author Julien Danjou <julien@danjou.info>
-- @copyright 2008-2009 Julien Danjou
-- @classmod awful.widget.common
---------------------------------------------------------------------------
-- Grab environment we need
local type = type
local ipairs = ipairs
local capi = { button = button }
local wibox = require("wibox")
local dpi = require("beautiful").xresources.apply_dpi
--- Common utilities for awful widgets
local common = {}
--- Common method to create buttons.
-- @tab buttons
-- @param object
-- @treturn table
function common.create_buttons(buttons, object)
if buttons then
local btns = {}
for _, b in ipairs(buttons) do
-- Create a proxy button object: it will receive the real
-- press and release events, and will propagate them to the
-- button object the user provided, but with the object as
-- argument.
local btn = capi.button { modifiers = b.modifiers, button = b.button }
btn:connect_signal("press", function () b:emit_signal("press", object) end)
btn:connect_signal("release", function () b:emit_signal("release", object) end)
btns[#btns + 1] = btn
end
return btns
end
end
--- Common update method.
-- @param w The widget.
-- @tab buttons
-- @func label Function to generate label parameters from an object.
-- The function gets passed an object from `objects`, and
-- has to return `text`, `bg`, `bg_image`, `icon`.
-- @tab data Current data/cache, indexed by objects.
-- @tab objects Objects to be displayed / updated.
function common.list_update(w, buttons, label, data, objects)
-- update the widgets, creating them if needed
w:reset()
for i, o in ipairs(objects) do
local cache = data[o]
local ib, tb, bgb, tbm, ibm, l
if cache then
ib = cache.ib
tb = cache.tb
bgb = cache.bgb
tbm = cache.tbm
ibm = cache.ibm
else
ib = wibox.widget.imagebox()
tb = wibox.widget.textbox()
bgb = wibox.container.background()
tbm = wibox.container.margin(tb, dpi(4), dpi(4))
ibm = wibox.container.margin(ib, dpi(4))
l = wibox.layout.fixed.horizontal()
-- All of this is added in a fixed widget
l:fill_space(true)
l:add(ibm)
l:add(tbm)
-- And all of this gets a background
bgb:set_widget(l)
bgb:buttons(common.create_buttons(buttons, o))
data[o] = {
ib = ib,
tb = tb,
bgb = bgb,
tbm = tbm,
ibm = ibm,
}
end
local text, bg, bg_image, icon, args = label(o, tb)
args = args or {}
-- The text might be invalid, so use pcall.
if text == nil or text == "" then
tbm:set_margins(0)
else
if not tb:set_markup_silently(text) then
tb:set_markup("<i><Invalid text></i>")
end
end
bgb:set_bg(bg)
if type(bg_image) == "function" then
-- TODO: Why does this pass nil as an argument?
bg_image = bg_image(tb,o,nil,objects,i)
end
bgb:set_bgimage(bg_image)
if icon then
ib:set_image(icon)
else
ibm:set_margins(0)
end
bgb.shape = args.shape
bgb.shape_border_width = args.shape_border_width
bgb.shape_border_color = args.shape_border_color
w:add(bgb)
end
end
return common
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
|
