152 lines
3.9 KiB
Lua
152 lines
3.9 KiB
Lua
---------------------------------------------------------------------------
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-- A container rotating the conained widget by 90 degrees.
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--
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--@DOC_wibox_container_defaults_rotate_EXAMPLE@
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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.container.rotate
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---------------------------------------------------------------------------
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local error = error
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local pairs = pairs
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local pi = math.pi
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local type = type
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local setmetatable = setmetatable
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local tostring = tostring
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local base = require("wibox.widget.base")
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local matrix = require("gears.matrix")
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local rotate = { mt = {} }
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local function transform(layout, width, height)
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local dir = layout:get_direction()
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if dir == "east" or dir == "west" then
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return height, width
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end
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return width, height
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end
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-- Layout this layout
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function rotate:layout(_, width, height)
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if not self.widget or not self.widget.visible then
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return
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end
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local dir = self:get_direction()
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local m = matrix.identity
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if dir == "west" then
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m = m:rotate(pi / 2)
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m = m:translate(0, -width)
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elseif dir == "south" then
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m = m:rotate(pi)
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m = m:translate(-width, -height)
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elseif dir == "east" then
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m = m:rotate(3 * pi / 2)
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m = m:translate(-height, 0)
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end
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-- Since we rotated, we might have to swap width and height.
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-- transform() does that for us.
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return { base.place_widget_via_matrix(self.widget, m, transform(self, width, height)) }
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end
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-- Fit this layout into the given area
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function rotate:fit(context, 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 transform(self, base.fit_widget(self, context, self.widget, transform(self, width, height)))
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end
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--- Set the widget that this layout rotates.
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function rotate:set_widget(widget)
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if widget then
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base.check_widget(widget)
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end
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self.widget = widget
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self:emit_signal("widget::layout_changed")
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end
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--- Get the number of children element
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-- @treturn table The children
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function rotate:get_children()
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return {self.widget}
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end
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--- Replace the layout children
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-- This layout only accept one children, all others will be ignored
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-- @tparam table children A table composed of valid widgets
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function rotate:set_children(children)
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self:set_widget(children[1])
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end
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--- Reset this layout. The widget will be removed and the rotation reset.
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function rotate:reset()
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self.direction = nil
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self:set_widget(nil)
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end
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--- Set the direction of this rotating container.
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-- Valid values are:
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--
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-- * *north*
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-- * *east*
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-- * *south*
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-- * *north*
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--
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--@DOC_wibox_container_rotate_angle_EXAMPLE@
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-- @tparam string dir The direction
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function rotate:set_direction(dir)
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local allowed = {
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north = true,
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east = true,
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south = true,
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west = true
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}
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if not allowed[dir] then
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error("Invalid direction for rotate layout: " .. tostring(dir))
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end
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self.direction = dir
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self:emit_signal("widget::layout_changed")
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end
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--- Get the direction of this rotating layout
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function rotate:get_direction()
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return self.direction or "north"
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end
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--- Returns a new rotate container.
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-- A rotate container rotates a given widget. Use
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-- :set_widget() to set the widget and :set_direction() for the direction.
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-- The default direction is "north" which doesn't change anything.
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-- @param[opt] widget The widget to display.
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-- @param[opt] dir The direction to rotate to.
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-- @treturn table A new rotate container.
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-- @function wibox.container.rotate
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local function new(widget, dir)
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local ret = base.make_widget()
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for k, v in pairs(rotate) 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:set_widget(widget)
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ret:set_direction(dir or "north")
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return ret
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end
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function rotate.mt:__call(...)
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return new(...)
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end
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return setmetatable(rotate, rotate.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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