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koreader/frontend/ui/widget/progresswidget.lua

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--[[--
Widget for displaying progress bar.
Configurable attributes:
* width
* height
* margin_v -- vertical margin for solid infill
* margin_h -- horizontal margin for solid infill
* radius
* bordersize
* bordercolor
* bgcolor
* rectcolor -- infill color
* ticks (list) -- default to nil, use this if you want to insert markers
* tick_width
* last -- maximum tick, used with ticks
Example:
local foo_bar = ProgressWidget:new{
width = 400,
height = 10,
percentage = 50/100,
}
UIManager:show(foo_bar)
]]
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local Widget = require("ui/widget/widget")
local Geom = require("ui/geometry")
local Blitbuffer = require("ffi/blitbuffer")
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local ProgressWidget = Widget:new{
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width = nil,
height = nil,
margin_h = 3,
margin_v = 1,
radius = 2,
bordersize = 1,
bordercolor = Blitbuffer.COLOR_BLACK,
bgcolor = Blitbuffer.COLOR_WHITE,
rectcolor = Blitbuffer.gray(0.7),
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percentage = nil,
ticks = nil,
tick_width = 3,
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last = nil,
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}
function ProgressWidget:getSize()
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return { w = self.width, h = self.height }
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end
function ProgressWidget:paintTo(bb, x, y)
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local my_size = self:getSize()
self.dimen = Geom:new{
x = x, y = y,
w = my_size.w,
h = my_size.h
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}
-- fill background
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bb:paintRoundedRect(x, y, my_size.w, my_size.h, self.bgcolor, self.radius)
-- paint border
bb:paintBorder(x, y,
my_size.w, my_size.h,
self.bordersize, self.bordercolor, self.radius)
-- paint percentage infill
bb:paintRect(x+self.margin_h, math.ceil(y+self.margin_v+self.bordersize),
math.ceil((my_size.w-2*self.margin_h)*self.percentage),
my_size.h-2*(self.margin_v+self.bordersize), self.rectcolor)
if self.ticks and self.last then
local bar_width = (my_size.w-2*self.margin_h)
local y_pos = y + self.margin_v + self.bordersize
local bar_height = my_size.h-2*(self.margin_v+self.bordersize)
for i=1, #self.ticks do
bb:paintRect(
x + bar_width*(self.ticks[i]/self.last),
y_pos,
self.tick_width,
bar_height,
self.bordercolor)
end
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end
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end
function ProgressWidget:setPercentage(percentage)
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self.percentage = percentage
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end
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return ProgressWidget