139 lines
3.8 KiB
Lua
139 lines
3.8 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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local pairs = pairs
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local type = type
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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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-- wibox.layout.margin
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local margin = { mt = {} }
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--- Draw a margin layout
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function margin:draw(wibox, cr, width, height)
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local x = self.left
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local y = self.top
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local w = self.right
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local h = self.bottom
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if not self.widget or width <= x + w or height <= y + h then
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return
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end
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base.draw_widget(wibox, cr, self.widget, x, y, width - x - w, height - y - h)
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end
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--- Fit a margin layout into the given space
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function margin:fit(width, height)
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local extra_w = self.left + self.right
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local extra_h = self.top + self.bottom
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local w, h = 0, 0
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if self.widget then
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w, h = self.widget:fit(width - extra_w, height - extra_h)
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end
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return w + extra_w, h + extra_h
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end
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--- Set the widget that this layout adds a margin on.
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function margin: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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--- Set all the margins to val.
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function margin:set_margins(val)
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self.left = val
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self.right = val
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self.top = val
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self.bottom = val
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self:emit_signal("widget::updated")
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end
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--- Reset this layout. The widget will be unreferenced and the margins set to 0.
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function margin:reset()
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self:set_widget(nil)
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self:set_margins(0)
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end
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--- Set the left margin that this layout adds to its widget.
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-- @param layout The layout you are modifying.
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-- @param margin The new margin to use.
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-- @name set_left
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-- @class function
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--- Set the right margin that this layout adds to its widget.
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-- @param layout The layout you are modifying.
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-- @param margin The new margin to use.
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-- @name set_right
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-- @class function
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--- Set the top margin that this layout adds to its widget.
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-- @param layout The layout you are modifying.
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-- @param margin The new margin to use.
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-- @name set_top
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-- @class function
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--- Set the bottom margin that this layout adds to its widget.
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-- @param layout The layout you are modifying.
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-- @param margin The new margin to use.
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-- @name set_bottom
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-- @class function
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-- Create setters for each direction
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for k, v in pairs({ "left", "right", "top", "bottom" }) do
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margin["set_" .. v] = function(layout, val)
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layout[v] = val
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layout:emit_signal("widget::updated")
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end
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end
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--- Returns a new margin layout.
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-- @param widget A widget to use (optional)
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-- @param left A margin to use on the left side of the widget (optional)
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-- @param right A margin to use on the right side of the widget (optional)
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-- @param top A margin to use on the top side of the widget (optional)
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-- @param bottom A margin to use on the bottom side of the widget (optional)
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local function new(widget, left, right, top, bottom)
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local ret = widget_base.make_widget()
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for k, v in pairs(margin) 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_left(left or 0)
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ret:set_right(right or 0)
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ret:set_top(top or 0)
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ret:set_bottom(bottom or 0)
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if widget then
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ret:set_widget(widget)
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end
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return ret
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end
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function margin.mt:__call(...)
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return new(...)
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end
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return setmetatable(margin, margin.mt)
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-- vim: filetype=lua:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80
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