--------------------------------------------------------------------------- -- @author Uli Schlachter -- @copyright 2010 Uli Schlachter -- @release @AWESOME_VERSION@ --------------------------------------------------------------------------- local setmetatable = setmetatable local table = table local pairs = pairs local type = type local base = require("wibox.layout.base") local widget_base = require("wibox.widget.base") module("wibox.layout.align") -- Draw the given align layout. dir describes the orientation of the layout, "x" -- means horizontal while "y" is vertical. local function draw(dir, layout, wibox, cr, width, height) local size_first = 0 local size_third = 0 local size_limit = dir == "y" and height or width if layout.first then local w, h = width, height if dir == "y" then _, h = layout.first:fit(w, h) size_first = h else w, _ = layout.first:fit(w, h) size_first = w end base.draw_widget(wibox, cr, layout.first, 0, 0, w, h) end if layout.third and size_first < size_limit then local w, h, x, y if dir == "y" then w, h = width, height - size_first _, h = layout.third:fit(w, h) x, y = 0, height - h size_third = h else w, h = width - size_first, height w, _ = layout.third:fit(w, h) x, y = width - w, 0 size_third = w end base.draw_widget(wibox, cr, layout.third, x, y, w, h) end if layout.second and size_first + size_third < size_limit then local x, y, w, h if dir == "y" then x, y = 0, size_first w, h = width, size_limit - size_first - size_third else x, y = size_first, 0 w, h = size_limit - size_first - size_third, height end base.draw_widget(wibox, cr, layout.second, x, y, w, h) end end local function widget_changed(layout, old_w, new_w) if old_w then old_w:disconnect_signal("widget::updated", layout._emit_updated) end if new_w then widget_base.check_widget(new_w) new_w:connect_signal("widget::updated", layout._emit_updated) end layout._emit_updated() end --- Set the layout's first widget. This is the widget that is at the left/top function set_first(layout, widget) widget_changed(layout, layout.first, widget) layout.first = widget end --- Set the layout's second widget. This is the centered one. function set_second(layout, widget) widget_changed(layout, widget) layout.second = widget end --- Set the layout's third widget. This is the widget that is at the right/bottom function set_third(layout, widget) widget_changed(layout, widget) layout.third = widget end function reset(layout) for k, v in pairs({ "first", "second", "third" }) do layout[v] = nil end layout:emit_signal("widget::updated") end local function get_layout(dir) local function draw_dir(layout, wibox, cr, width, height) draw(dir, layout, wibox, cr, width, height) end local ret = widget_base.make_widget() ret.draw = draw_dir ret.fit = function(box, ...) return ... end ret._emit_updated = function() ret:emit_signal("widget::updated") end for k, v in pairs(_M) do if type(v) == "function" then ret[k] = v end end return ret end --- Returns a new horizontal align layout. An align layout can display up to -- three widgets. The widget set via :set_left() is left-aligned. :set_right() -- sets a widget which will be right-aligned. The remaining space between those -- two will be given to the widget set via :set_middle(). function horizontal() local ret = get_layout("x") ret.set_left = ret.set_first ret.set_middle = ret.set_second ret.set_right = ret.set_third return ret end --- Returns a new vertical align layout. An align layout can display up to -- three widgets. The widget set via :set_top() is top-aligned. :set_bottom() -- sets a widget which will be bottom-aligned. The remaining space between those -- two will be given to the widget set via :set_middle(). function vertical() local ret = get_layout("y") ret.set_top = ret.set_first ret.set_middle = ret.set_second ret.set_bottom = ret.set_third return ret end -- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80