awful.widget: add graph stack property
Initial implementation of stacked graphs. Adds two new methods,
set_stack (false by default) and set_stack_colors (i.e. {"red",
"white", "blue"}). The order of the colors matters, because the
add_value method now accepts an (optional) last argument, an index of
a color from your stack color group.
Signed-off-by: Adrian C. (anrxc) <anrxc@sysphere.org>
Signed-off-by: Julien Danjou <julien@danjou.info>
This commit is contained in:
Adrian C. (anrxc)
Julien Danjou
parent
167770d06f
commit
dc5b09d3b0
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@ -8,6 +8,7 @@ local setmetatable = setmetatable
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local ipairs = ipairs
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local math = math
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local table = table
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local type = type
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local capi = { image = image,
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widget = widget }
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local layout = require("awful.widget.layout")
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@ -65,9 +66,21 @@ local data = setmetatable({}, { __mode = "k" })
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-- @param graph The graph.
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-- @param scale A boolean value
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local properties = { "width", "height", "border_color",
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"gradient_colors", "gradient_angle", "color",
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"background_color", "max_value", "scale" }
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--- Set the graph to draw stacks. Default is false.
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-- @name set_stack
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-- @class function
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-- @param progressbar The graph.
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-- @param stack A boolean value.
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--- Set the graph stacking colors. Order matters.
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-- @name set_stack_colors
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-- @class function
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-- @param graph The graph.
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-- @param stack_colors A table with stacking colors.
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local properties = { "width", "height", "border_color", "stack",
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"stack_colors", "gradient_colors", "gradient_angle",
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"color", "background_color", "max_value", "scale" }
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local function update(graph)
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-- Create new empty image
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@ -78,61 +91,90 @@ local function update(graph)
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border_width = 1
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end
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local values = data[graph].values
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local max_value = data[graph].max_value
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if data[graph].scale then
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for _, v in ipairs(values) do
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if v > max_value then
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max_value = v
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end
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end
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end
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-- Draw background
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-- Draw full gradient
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if data[graph].gradient_colors then
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img:draw_rectangle_gradient(border_width, border_width,
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data[graph].width - (2 * border_width),
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data[graph].height - (2 * border_width),
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data[graph].gradient_colors,
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data[graph].gradient_angle or 270)
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else
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-- Draw a stacked graph
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if data[graph].stack then
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-- Draw the background first
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img:draw_rectangle(border_width, border_width,
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data[graph].width - (2 * border_width),
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data[graph].height - (2 * border_width),
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true, data[graph].color or "red")
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end
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data[graph].height,
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true, data[graph].background_color or "#000000aa")
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-- No value? Draw nothing.
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if #values ~= 0 then
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-- Draw reverse
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for i = 0, #values - 1 do
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local value = values[#values - i]
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if value >= 0 then
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value = value / max_value
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img:draw_line(data[graph].width - border_width - i - 1,
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border_width - 1 +
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math.floor(((data[graph].height - 2 * border_width) * (1 - value)) + 0.5),
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data[graph].width - border_width - i - 1,
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border_width - 1,
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data[graph].background_color or "#000000aa")
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for i = 0, data[graph].width - (2 * border_width) do
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local rel_i = 0
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local rel_x = data[graph].width - border_width - i - 1
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if data[graph].stack_colors then
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for idx, color in ipairs(data[graph].stack_colors) do
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local values = data[graph].values[idx]
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if values and i < #values then
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local value = values[#values - i] + rel_i
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img:draw_line(rel_x, border_width - 1 +
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math.ceil((data[graph].height - 2 * border_width) * (1 - rel_i)),
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rel_x, border_width - 1 +
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math.ceil((data[graph].height - 2 * border_width) * (1 - value)),
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color or "red")
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rel_i = value
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end
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end
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end
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end
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else
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local values = data[graph].values
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local max_value = data[graph].max_value
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if data[graph].scale then
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for _, v in ipairs(values) do
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if v > max_value then
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max_value = v
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end
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end
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end
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-- Draw full gradient
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if data[graph].gradient_colors then
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img:draw_rectangle_gradient(border_width, border_width,
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data[graph].width - (2 * border_width),
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data[graph].height - (2 * border_width),
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data[graph].gradient_colors,
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data[graph].gradient_angle or 270)
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else
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img:draw_rectangle(border_width, border_width,
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data[graph].width - (2 * border_width),
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data[graph].height - (2 * border_width),
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true, data[graph].color or "red")
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end
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-- Draw the background on no value
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if #values ~= 0 then
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-- Draw reverse
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for i = 0, #values - 1 do
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local value = values[#values - i]
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if value >= 0 then
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value = value / max_value
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img:draw_line(data[graph].width - border_width - i - 1,
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border_width - 1 +
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math.ceil((data[graph].height - 2 * border_width) * (1 - value)),
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data[graph].width - border_width - i - 1,
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border_width - 1,
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data[graph].background_color or "#000000aa")
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end
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end
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end
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-- If we didn't draw values in full length, draw a square
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-- over the last, left, part to reset everything to 0
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if #values < data[graph].width - (2 * border_width) then
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img:draw_rectangle(border_width, border_width,
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data[graph].width - (2 * border_width) - #values,
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data[graph].height - (2 * border_width),
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true, data[graph].background_color or "#000000aa")
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end
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end
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-- If we did not draw values everywhere, draw a square over the last left
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-- part to set everything to 0 :-)
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if #values < data[graph].width - (2 * border_width) then
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img:draw_rectangle(border_width, border_width,
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data[graph].width - (2 * border_width) - #values,
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data[graph].height - (2 * border_width),
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true, data[graph].background_color or "#000000aa")
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end
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-- Draw the border last so that it overlaps other stuff
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-- Draw the border last so that it overlaps already drawn values
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if data[graph].border_color then
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-- Draw border
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-- Draw the border
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img:draw_rectangle(0, 0, data[graph].width, data[graph].height,
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false, data[graph].border_color or "white")
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end
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@ -144,24 +186,34 @@ end
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--- Add a value to the graph
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-- @param graph The graph.
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-- @param value The value between 0 and 1.
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local function add_value(graph, value)
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-- @param group The stack color group index.
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local function add_value(graph, value, group)
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if not graph then return end
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local value = value or 0
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local values = data[graph].values
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local max_value = data[graph].max_value
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value = math.max(0, value)
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if not data[graph].scale then
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value = math.min(max_value, value)
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end
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table.insert(data[graph].values, value)
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if data[graph].stack and group then
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if not data[graph].values[group]
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or type(data[graph].values[group]) ~= "table"
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then
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data[graph].values[group] = {}
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end
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values = data[graph].values[group]
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end
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table.insert(values, value)
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local border_width = 0
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if data[graph].border then border_width = 2 end
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-- Ensure we never have more data than we can draw
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while #data[graph].values > data[graph].width - border_width do
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table.remove(data[graph].values, 1)
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while #values > data[graph].width - border_width do
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table.remove(values, 1)
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end
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update(graph)
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