127 lines
3.0 KiB
Lua
127 lines
3.0 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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-- @classmod wibox.widget.background
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---------------------------------------------------------------------------
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local base = require("wibox.widget.base")
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local color = require("gears.color")
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local layout_base = require("wibox.layout.base")
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local surface = require("gears.surface")
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local cairo = require("lgi").cairo
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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 background = { mt = {} }
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--- Draw this widget
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function background:draw(wibox, cr, width, height)
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if not self.widget then
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return
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end
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cr:save()
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if self.background then
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cr:set_source(self.background)
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cr:paint()
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end
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if self.bgimage then
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local pattern = cairo.Pattern.create_for_surface(self.bgimage)
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cr:set_source(pattern)
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cr:paint()
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end
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cr:restore()
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if self.foreground then
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cr:save()
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cr:set_source(self.foreground)
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end
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layout_base.draw_widget(wibox, cr, self.widget, 0, 0, width, height)
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if self.foreground then
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cr:restore()
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end
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end
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--- Fit this widget into the given area
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function background:fit(width, height)
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if not self.widget then
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return 0, 0
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end
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return self.widget:fit(width, height)
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end
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--- Set the widget that is drawn on top of the background
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function background:set_widget(widget)
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if self.widget then
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self.widget:disconnect_signal("widget::updated", self._emit_updated)
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end
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if widget then
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base.check_widget(widget)
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widget:weak_connect_signal("widget::updated", self._emit_updated)
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end
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self.widget = widget
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self._emit_updated()
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end
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--- Set the background to use
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function background:set_bg(bg)
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if bg then
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self.background = color(bg)
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else
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self.background = nil
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end
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self._emit_updated()
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end
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--- Set the foreground to use
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function background:set_fg(fg)
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if fg then
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self.foreground = color(fg)
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else
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self.foreground = nil
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end
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self._emit_updated()
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end
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--- Set the background image to use
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function background:set_bgimage(image)
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self.bgimage = surface.load(image)
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self._emit_updated()
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end
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--- Returns a new background layout. A background layout applies a background
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-- and foreground color to another widget.
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-- @param[opt] widget The widget to display.
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-- @param[opt] bg The background to use for that widget.
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local function new(widget, bg)
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local ret = base.make_widget()
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for k, v in pairs(background) 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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ret._emit_updated = function()
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ret:emit_signal("widget::updated")
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end
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ret:set_widget(widget)
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ret:set_bg(bg)
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return ret
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end
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function background.mt:__call(...)
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return new(...)
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end
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return setmetatable(background, background.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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