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shape: Add octogon shape

This commit is contained in:
Emmanuel Lepage Vallee 2016-03-09 23:41:48 -05:00
parent f0bf642f32
commit 3b95d2467f
1 changed files with 20 additions and 0 deletions
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20
lib/gears/shape.lua
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@ -211,6 +211,26 @@ function module.cross(cr, width, height, thickness)
cr:close_path() cr:close_path()
end end
--- A similar shape to the `rounded_rect`, but with sharp corners
-- @param cr A cairo context
-- @tparam number width The shape width
-- @tparam number height The shape height
-- @tparam number corner_radius
function module.octogon(cr, width, height, corner_radius)
corner_radius = corner_radius or math.min(10, math.min(width, height)/4)
local offset = math.sqrt( (corner_radius*corner_radius) / 2 )
cr:move_to(offset, 0)
cr:line_to(width-offset, 0)
cr:line_to(width, offset)
cr:line_to(width, height-offset)
cr:line_to(width-offset, height)
cr:line_to(offset, height)
cr:line_to(0, height-offset)
cr:line_to(0, offset)
cr:close_path()
end
--- Ajust the shape using a transformation object --- Ajust the shape using a transformation object
-- --
-- Apply various transformations to the shape -- Apply various transformations to the shape