335 lines
9.9 KiB
Lua
335 lines
9.9 KiB
Lua
---------------------------------------------------------------------------
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-- @author Uli Schlachter
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-- @copyright 2010 Uli Schlachter
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-- @release @AWESOME_VERSION@
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---------------------------------------------------------------------------
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require("wibox.layout")
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require("wibox.widget")
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local capi = {
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drawin = drawin,
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root = root,
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awesome = awesome
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}
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local setmetatable = setmetatable
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local pairs = pairs
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local type = type
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local table = table
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local string_format = string.format
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local color = require("gears.color")
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local object = require("gears.object")
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local sort = require("gears.sort")
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local beautiful = require("beautiful")
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local surface = require("gears.surface")
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local cairo = require("lgi").cairo
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--- This provides widget box windows. Every wibox can also be used as if it were
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-- a drawin. All drawin functions and properties are also available on wiboxes!
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module("wibox")
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local function do_redraw(wibox)
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if not wibox.drawin.visible then
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return
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end
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local geom = wibox.drawin:geometry()
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local cr = cairo.Context(surface(wibox.drawin.surface))
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-- Draw the background
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cr:save()
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-- This is pseudo-transparency: We draw the wallpaper in the background
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local wallpaper = surface(capi.root.wallpaper())
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if wallpaper then
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cr.operator = cairo.Operator.SOURCE
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cr:set_source_surface(wallpaper, -wibox.drawin.x, -wibox.drawin.y)
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cr:paint()
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end
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cr.operator = cairo.Operator.OVER
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cr:set_source(wibox.background_color)
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cr:paint()
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cr:restore()
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-- Draw the widget
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wibox._widget_geometries = {}
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if wibox.widget and not wibox.widget.__fake_widget then
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cr:set_source(wibox.foreground_color)
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wibox.widget:draw(wibox, cr, geom.width, geom.height)
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wibox:widget_at(wibox.widget, 0, 0, geom.width, geom.height)
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end
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wibox.drawin:refresh()
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end
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--- Register a widget's position.
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-- This is internal, don't call it yourself! Only wibox.layout.base.draw_widget
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-- is allowed to call this.
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function widget_at(wibox, widget, x, y, width, height)
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local t = {
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widget = widget,
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x = x, y = y,
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width = width, height = height
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}
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table.insert(wibox._widget_geometries, t)
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end
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--- Find a widget by a point.
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-- The wibox must have drawn itself at least once for this to work.
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-- @param wibox The wibox to look at
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-- @param x X coordinate of the point
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-- @param y Y coordinate of the point
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-- @return A sorted table with all widgets that contain the given point. The
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-- widgets are sorted by relevance.
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function find_widgets(wibox, x, y)
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local matches = {}
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-- Find all widgets that contain the point
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for k, v in pairs(wibox._widget_geometries) do
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local match = true
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if v.x > x or v.x + v.width <= x then match = false end
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if v.y > y or v.y + v.height <= y then match = false end
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if match then
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table.insert(matches, v)
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end
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end
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-- Sort the matches by area, the assumption here is that widgets don't
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-- overlap and so smaller widgets are "more specific".
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local function cmp(a, b)
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local area_a = a.width * a.height
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local area_b = b.width * b.height
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return area_a < area_b
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end
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sort(matches, cmp)
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return matches
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end
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--- Set the widget that the wibox displays
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function set_widget(wibox, widget)
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if wibox.widget and not wibox.widget.__fake_widget then
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-- Disconnect from the old widget so that we aren't updated due to it
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wibox.widget:disconnect_signal("widget::updated", wibox.draw)
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end
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if not widget then
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wibox.widget = { __fake_widget = true }
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else
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wibox.widget = widget
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widget:connect_signal("widget::updated", wibox.draw)
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end
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-- Make sure the wibox is updated
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wibox.draw()
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end
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--- Set the background of the wibox
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-- @param wibox The wibox to use
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-- @param c The background to use. This must either be a cairo pattern object,
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-- nil or a string that gears.color() understands.
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function set_bg(wibox, c)
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local c = c or "#000000"
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if type(c) == "string" or type(c) == "table" then
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c = color(c)
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end
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wibox.background_color = c
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wibox.draw()
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end
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--- Set the foreground of the wibox
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-- @param wibox The wibox to use
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-- @param c The foreground to use. This must either be a cairo pattern object,
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-- nil or a string that gears.color() understands.
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function set_fg(wibox, c)
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local c = c or "#FFFFFF"
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if type(c) == "string" or type(c) == "table" then
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c = color(c)
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end
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wibox.foreground_color = c
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wibox.draw()
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end
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--- Helper function to make wibox:buttons() work as expected
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function buttons(box, ...)
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return box.drawin:buttons(...)
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end
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--- Helper function to make wibox:struts() work as expected
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function struts(box, ...)
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return box.drawin:struts(...)
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end
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--- Helper function to make wibox:geometry() work as expected
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function geometry(box, ...)
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return box.drawin:geometry(...)
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end
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local function emit_difference(name, list, skip)
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local function in_table(table, val)
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for k, v in pairs(table) do
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if v == val then
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return true
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end
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end
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return false
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end
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for k, v in pairs(list) do
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if not in_table(skip, v) then
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v:emit_signal(name)
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end
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end
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end
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local function handle_leave(wibox)
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emit_difference("mouse::leave", wibox._widgets_under_mouse, {})
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wibox._widgets_under_mouse = {}
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end
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local function handle_motion(wibox, x, y)
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if x < 0 or y < 0 or x > wibox.drawin.width or y > wibox.drawin.height then
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return handle_leave(wibox)
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end
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-- Build a plain list of all widgets on that point
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local widgets_list = wibox:find_widgets(x, y)
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local widgets = {}
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for k, v in pairs(widgets_list) do
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widgets[#widgets + 1] = v.widget
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end
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-- First, "leave" all widgets that were left
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emit_difference("mouse::leave", wibox._widgets_under_mouse, widgets)
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-- Then enter some widgets
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emit_difference("mouse::enter", widgets, wibox._widgets_under_mouse)
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wibox._widgets_under_mouse = widgets
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end
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local function setup_signals(wibox)
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local w = wibox.drawin
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local function clone_signal(name)
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wibox:add_signal(name)
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-- When "name" is emitted on wibox.drawin, also emit it on wibox
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w:connect_signal(name, function(_, ...)
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wibox:emit_signal(name, ...)
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end)
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end
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clone_signal("mouse::enter")
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clone_signal("mouse::leave")
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clone_signal("mouse::move")
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clone_signal("property::border_color")
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clone_signal("property::border_width")
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clone_signal("property::buttons")
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clone_signal("property::cursor")
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clone_signal("property::height")
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clone_signal("property::ontop")
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clone_signal("property::opacity")
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clone_signal("property::struts")
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clone_signal("property::visible")
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clone_signal("property::widgets")
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clone_signal("property::width")
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clone_signal("property::x")
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clone_signal("property::y")
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-- Update the wibox when its geometry changes
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w:connect_signal("property::height", wibox.draw)
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w:connect_signal("property::width", wibox.draw)
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w:connect_signal("property::visible", function()
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if w.visible then
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capi.awesome.connect_signal("wallpaper_changed", wibox.draw)
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wibox.draw()
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else
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capi.awesome.disconnect_signal("wallpaper_changed", wibox.draw)
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end
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end)
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local function button_signal(name)
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w:connect_signal(name, function(w, x, y, ...)
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local widgets = wibox:find_widgets(x, y)
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for k, v in pairs(widgets) do
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-- Calculate x/y inside of the widget
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local lx = x - v.x
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local ly = y - v.y
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v.widget:emit_signal(name, lx, ly, ...)
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end
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end)
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end
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button_signal("button::press")
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button_signal("button::release")
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wibox:connect_signal("mouse::move", handle_motion)
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wibox:connect_signal("mouse::leave", handle_leave)
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end
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local function new(args)
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local ret = object()
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local w = capi.drawin(args)
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ret.drawin = w
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for k, v in pairs(_M) do
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if type(v) == "function" then
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ret[k] = v
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end
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end
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-- This is to make sure that the wibox will only be redrawn once even when
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-- we receive multiple widget::updated signals.
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ret._redraw_pending = false
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ret._do_redraw = function()
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ret._redraw_pending = false
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capi.awesome.disconnect_signal("refresh", ret._do_redraw)
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do_redraw(ret)
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end
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-- Connect our signal when we need a redraw
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ret.draw = function()
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if not ret._redraw_pending then
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capi.awesome.connect_signal("refresh", ret._do_redraw)
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ret._redraw_pending = true
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end
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end
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setup_signals(ret)
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-- Set the default background
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ret:set_bg(args.bg or beautiful.bg_normal)
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ret:set_fg(args.fg or beautiful.fg_normal)
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-- Make sure the wibox is drawn at least once
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ret.draw()
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-- Due to the metatable below, we need this trick
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ret.widget = { __fake_widget = true }
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ret._widget_geometries = {}
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ret._widgets_under_mouse = {}
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-- Redirect all non-existing indexes to the "real" drawin
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setmetatable(ret, {
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__index = w,
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__newindex = w
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})
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return ret
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end
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--- Redraw a wibox. You should never have to call this explicitely because it is
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-- automatically called when needed.
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-- @param wibox
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-- @name draw
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-- @class function
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--- Widget box object.
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-- Every wibox "inherits" from a drawin and you can use all of drawin's
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-- functions directly on this as well. When creating a wibox, you can specify a
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-- "fg" and a "bg" color as keys in the table that is passed to the constructor.
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-- All other arguments will be passed to drawin's constructor.
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-- @class table
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-- @name drawin
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setmetatable(_M, { __call = function(_, ...) return new(...) end })
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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