115 lines
2.9 KiB
Lua
115 lines
2.9 KiB
Lua
|
---------------------------------------------------------------------------
|
||
|
|
-- @author Uli Schlachter
|
||
|
|
-- @copyright 2010 Uli Schlachter
|
||
|
|
-- @release @AWESOME_VERSION@
|
||
|
|
---------------------------------------------------------------------------
|
||
|
|
|
||
|
|
local oocairo = require("oocairo")
|
||
|
|
local base = require("wibox.widget.base")
|
||
|
|
local setmetatable = setmetatable
|
||
|
|
local pairs = pairs
|
||
|
|
local type = type
|
||
|
|
local pcall = pcall
|
||
|
|
local print = print
|
||
|
|
|
||
|
|
module("wibox.widget.imagebox")
|
||
|
|
|
||
|
|
--- Draw an imagebox with the given cairo context in the given geometry.
|
||
|
|
function draw(box, wibox, cr, width, height)
|
||
|
|
if not box.image then return end
|
||
|
|
|
||
|
|
cr:save()
|
||
|
|
|
||
|
|
if not box.resize_forbidden then
|
||
|
|
-- Let's scale the image so that it fits into (width, height)
|
||
|
|
local w = box.image:get_width()
|
||
|
|
local h = box.image:get_height()
|
||
|
|
local aspect = width / w
|
||
|
|
local aspect_h = height / h
|
||
|
|
if aspect > aspect_h then aspect = aspect_h end
|
||
|
|
|
||
|
|
cr:scale(aspect, aspect)
|
||
|
|
end
|
||
|
|
cr:set_source(box.image)
|
||
|
|
cr:paint()
|
||
|
|
|
||
|
|
cr:restore()
|
||
|
|
end
|
||
|
|
|
||
|
|
--- Fit the imagebox into the given geometry
|
||
|
|
function fit(box, width, height)
|
||
|
|
if not box.image then
|
||
|
|
return 0, 0
|
||
|
|
end
|
||
|
|
|
||
|
|
local w = box.image:get_width()
|
||
|
|
local h = box.image:get_height()
|
||
|
|
|
||
|
|
if w > width then
|
||
|
|
h = h * width / w
|
||
|
|
w = width
|
||
|
|
end
|
||
|
|
if h > height then
|
||
|
|
w = w * height / h
|
||
|
|
h = height
|
||
|
|
end
|
||
|
|
|
||
|
|
if not box.resize_forbidden then
|
||
|
|
local aspect = width / w
|
||
|
|
local aspect_h = height / h
|
||
|
|
|
||
|
|
-- Use the smaller one of the two aspect ratios.
|
||
|
|
if aspect > aspect_h then aspect = aspect_h end
|
||
|
|
|
||
|
|
w, h = w * aspect, h * aspect
|
||
|
|
end
|
||
|
|
|
||
|
|
return w, h
|
||
|
|
end
|
||
|
|
|
||
|
|
--- Set an imagebox' image
|
||
|
|
-- @param image Either a string or a cairo image surface. A string is
|
||
|
|
-- interpreted as the path to a png image file.
|
||
|
|
function set_image(box, image)
|
||
|
|
local image = image
|
||
|
|
|
||
|
|
if type(image) == "string" then
|
||
|
|
local success, result = pcall(oocairo.image_surface_create_from_png, image)
|
||
|
|
if not success then
|
||
|
|
print("Error while reading '" .. image .. "': " .. result)
|
||
|
|
return false
|
||
|
|
end
|
||
|
|
image = result
|
||
|
|
end
|
||
|
|
|
||
|
|
box.image = image
|
||
|
|
|
||
|
|
box:emit_signal("widget::updated")
|
||
|
|
return true
|
||
|
|
end
|
||
|
|
|
||
|
|
--- Should the image be resized to fit into the available space?
|
||
|
|
-- @param allowed If false, the image will be clipped, else it will be resized
|
||
|
|
-- to fit into the available space.
|
||
|
|
function set_resize(box, allowed)
|
||
|
|
box.resize_forbidden = not allowed
|
||
|
|
box:emit_signal("widget::updated")
|
||
|
|
end
|
||
|
|
|
||
|
|
-- Returns a new imagebox
|
||
|
|
local function new()
|
||
|
|
local ret = base.make_widget()
|
||
|
|
|
||
|
|
for k, v in pairs(_M) do
|
||
|
|
if type(v) == "function" then
|
||
|
|
ret[k] = v
|
||
|
|
end
|
||
|
|
end
|
||
|
|
|
||
|
|
return ret
|
||
|
|
end
|
||
|
|
|
||
|
|
setmetatable(_M, { __call = function (_, ...) return new(...) end })
|
||
|
|
|
||
|
|
-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=80
|