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The following task has a new comment added:
FS#1296 - Updated signal causes total relayout
User who did this - Uli Schlachter (psychon)
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Sorry for spamming.
I tested a 45 degree rotation and quite some code broke. Here is the code for
the rotation:
local custom = base.make_widget()
function custom:fit(width, height) return width, height end
function custom:draw() end
custom.before_draw_children = custom.draw
custom.after_draw_children = custom.draw
function custom:layout()
local m = cairo.Matrix.create_translate(30, 30)
m:rotate(math.pi / 4)
m:translate(0, -30)
return {
base.place_widget(f, m, 30, 10),
}
end
And here are the needed fixes:
function wibox:damage_area(x, y, width, height)
local rect = cairo.RectangleInt({
x = math.floor(x),
y = math.floor(y),
width = math.ceil(width),
height = math.ceil(height)
})
self._dirty_area:union_rectangle(rect)
end
function wibox:_widget_needs_redraw(widget_state)
-- We have to transform this widget's geometry into global coordinates
local m = cairo.Matrix.create_identity()
local state = widget_state
while state ~= nil do
m:multiply(m, state.matrix)
state = state.parent
end
-- XXX: How can this be done nicer?
local x1, y1 = m:transform_point(0, 0)
local x2, y2 = m:transform_point(0, widget_state.height)
local x3, y3 = m:transform_point(widget_state.width, widget_state.height)
local x4, y4 = m:transform_point(widget_state.width, 0)
local x = math.min(x1, x2, x3, x4)
local y = math.min(y1, y2, y3, y4)
local width = math.max(x1, x2, x3, x4) - x
local height = math.max(y1, y2, y3, y4) - y
self:damage_area(x, y, width, height)
end
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More information can be found at the following URL:
https://awesome.naquadah.org/bugs/index.php?do=details&task_id=1296#comment4158
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