131 lines
3.6 KiB
Lua
131 lines
3.6 KiB
Lua
---------------------------------------------------------------------------
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-- @author dodo
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-- @copyright 2012 dodo
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-- @release @AWESOME_VERSION@
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-- @classmod wibox.layout.mirror
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---------------------------------------------------------------------------
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local type = type
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local error = error
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local pairs = pairs
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local ipairs = ipairs
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local setmetatable = setmetatable
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local base = require("wibox.layout.base")
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local widget_base = require("wibox.widget.base")
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local mirror = { mt = {} }
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--- Draw this layout
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function mirror:draw(wibox, cr, width, height)
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if not self.widget then return { width = 0, height = 0 } end
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if not self.horizontal and not self.vertical then
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self.widget:draw(wibox, cr, width, height)
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return -- nothing changed
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end
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cr:save()
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local t = { x = 0, y = 0 } -- translation
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local s = { x = 1, y = 1 } -- scale
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if self.horizontal then
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t.y = height
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s.y = -1
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end
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if self.vertical then
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t.x = width
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s.x = -1
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end
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cr:translate(t.x, t.y)
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cr:scale(s.x, s.y)
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self.widget:draw(wibox, cr, width, height)
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-- Undo the scale and translation from above.
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cr:restore()
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end
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--- Fit this layout into the given area
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function mirror:fit(...)
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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 base.fit_widget(self.widget, ...)
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end
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--- Set the widget that this layout mirrors.
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-- @param widget The widget to mirror
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function mirror: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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widget_base.check_widget(widget)
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widget: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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--- Reset this layout. The widget will be removed and the axes reset.
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function mirror:reset()
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self.horizontal = false
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self.vertical = false
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self:set_widget(nil)
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end
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--- Set the reflection of this mirror layout.
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-- @param reflection a table which contains new values for horizontal and/or vertical (booleans)
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function mirror:set_reflection(reflection)
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if type(reflection) ~= 'table' then
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error("Invalid type of reflection for mirror layout: " ..
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type(reflection) .. " (should be a table)")
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end
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for _, ref in ipairs({"horizontal", "vertical"}) do
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if reflection[ref] ~= nil then
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self[ref] = reflection[ref]
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end
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end
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self._emit_updated()
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end
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--- Get the reflection of this mirror layout.
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-- @return a table of booleans with the keys "horizontal", "vertical".
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function mirror:get_reflection()
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return { horizontal = self.horizontal, vertical = self.vertical }
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end
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--- Returns a new mirror layout. A mirror layout mirrors a given widget. Use
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-- :set_widget() to set the widget and
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-- :set_horizontal() and :set_vertical() for the direction.
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-- horizontal and vertical are by default false which doesn't change anything.
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-- @param[opt] widget The widget to display.
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-- @param[opt] reflection A table describing the reflection to apply.
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local function new(widget, reflection)
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local ret = widget_base.make_widget()
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ret.horizontal = false
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ret.vertical = false
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for k, v in pairs(mirror) 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_reflection(reflection or {})
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return ret
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end
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function mirror.mt:__call(...)
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return new(...)
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end
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return setmetatable(mirror, mirror.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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