Aire-One
/
awesome
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Simplify the graph drawing code 

Instead of having to handle the border width all the time, let's make cairo
worry about that.

Signed-off-by: Uli Schlachter <psychon@znc.in>
This commit is contained in:
Uli Schlachter 2012-06-13 18:06:05 +02:00
parent 7a1acd4a98
commit f702c4ea04
1 changed files with 20 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
lib/awful/widget/graph.lua.in
View File

@ -70,19 +70,18 @@ function draw(graph, wibox, cr, width, height)
local max_value = data[graph].max_value
local values = data[graph].values
local border_width = 0
if data[graph].border_color then
border_width = 1
end
cr:set_line_width(1)
-- Draw the background first
cr:rectangle(border_width, border_width,
width - (2 * border_width),
height - (2 * border_width))
cr:set_source(color(data[graph].background_color or "#000000aa"))
cr:fill()
cr:paint()
-- Account for the border width
cr:save()
if data[graph].border_color then
cr:translate(1, 1)
width, height = width - 2, height - 2
end
-- Draw a stacked graph
if data[graph].stack then
@ -97,19 +96,17 @@ function draw(graph, wibox, cr, width, height)
end
end
for i = 0, width - (2 * border_width) do
for i = 0, width do
local rel_i = 0
local rel_x = border_width + i + 0.5
local rel_x = i + 0.5
if data[graph].stack_colors then
for idx, col in ipairs(data[graph].stack_colors) do
local stack_values = values[idx]
if stack_values and i < #stack_values then
local value = stack_values[#stack_values - i] + rel_i
cr:move_to(rel_x, border_width +
(height - 2 * border_width) * (1 - (rel_i / max_value)))
cr:line_to(rel_x, border_width +
(height - 2 * border_width) * (1 - (value / max_value)))
cr:move_to(rel_x, height * (1 - (rel_i / max_value)))
cr:line_to(rel_x, height * (1 - (value / max_value)))
cr:set_source(color(col or "#ff0000"))
cr:stroke()
rel_i = value
@ -133,10 +130,8 @@ function draw(graph, wibox, cr, width, height)
local value = values[#values - i]
if value >= 0 then
value = value / max_value
cr:move_to(border_width + i + 0.5, border_width +
(height - 2 * border_width) * (1 - value))
cr:line_to(border_width + i + 0.5, border_width +
(height - 2 * border_width))
cr:move_to(i + 0.5, height * (1 - value))
cr:line_to(i + 0.5, height)
end
end
cr:set_source(color(data[graph].color or "#ff0000"))
@ -145,8 +140,14 @@ function draw(graph, wibox, cr, width, height)
end
-- Undo the cr:translate() for the border
cr:restore()
-- Draw the border last so that it overlaps already drawn values
if data[graph].border_color then
-- We decremented these by two above
width, height = width + 2, height + 2
-- Draw the border
cr:rectangle(0.5, 0.5, width - 1, height - 1)
cr:set_source(color(data[graph].border_color or "#ffffff"))