There exists also several pure lua calender implementation, which does
not depend external application:

<shameless_self_plug>
   https://github.com/Mic92/awesome-dotfiles/blob/master/cal.lua
</shameless_self_plug>

2011/11/8 Matija Žeželj <[email protected]>:
> hello group,
> i need help with my calendar widget.
> widget:
> -- }}}
>     local calendar = nil
>     local offset = 0
>     function remove_calendar()
>         if calendar ~= nil then
>             naughty.destroy(calendar)
>             calendar = nil
>             offset = 0
>         end
>     end
>     function add_calendar(inc_offset)
>         local save_offset = offset
>         remove_calendar()
>         offset = save_offset + inc_offset
>         local datespec = os.date("*t")
>         datespec = datespec.year * 12 + datespec.month - 1 + offset
>         datespec = (datespec % 12 + 1) .. " " .. math.floor(datespec / 12)
>         local cal = awful.util.pread("cal " .. datespec)
>         cal = string.gsub(cal, "^%s*(.-)%s*$", "%1")
>         calendar = naughty.notify({
>             text = string.format('<span font_desc="%s">%s</span>',
> "Profont", os.date("%a, %d. %B %Y") .. "\n" .. cal),
>             timeout = 0, hover_timeout = 0.5,
>             width = 165,
>         })
>     end
> -- change clockbox for your clock widget (e.g. mytextclock)
>     mytextclock:add_signal("mouse::enter", function()
>       add_calendar(0)
>     end)
>     mytextclock:add_signal("mouse::leave", remove_calendar)
>
>     mytextclock:buttons(awful.util.table.join{
>         awful.button({ }, 4, function() add_calendar(-1) end),
>         awful.button({ }, 5, function() add_calendar(1) end),
>     })
> -- {{{ Mouse bindings
> root.buttons(awful.util.table.join(
>     awful.button({ }, 3, function () mymainmenu:toggle() end),
>     awful.button({ }, 4, awful.tag.viewnext),
>     awful.button({ }, 5, awful.tag.viewprev)
> ))
> -- }}}
> problem: this widget should show calendar on mouse over but it tries to
> highlight todays date (?) but it fails. instead of it if shifts current week
> cells some 5 cells to right.
> a picture is worth a thousand words. :
> http://ompldr.org/vYjZtMg/cal.jpg
> could you help me to set this right? i mean left. i mean to look fine :)
> thanks in advance ;)
> Matija



-- 
Gruß Jörg

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