koreader/frontend/ui/widget/progresswidget.lua

local Widget = require("ui/widget/widget")
local Geom = require("ui/geometry")
local Blitbuffer = require("ffi/blitbuffer")

--[[
ProgressWidget shows a progress bar
--]]
local ProgressWidget = Widget:new{
    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),
    percentage = nil,
    ticks = {},
    tick_width = 3,
    last = nil,
}

function ProgressWidget:getSize()
    return { w = self.width, h = self.height }
end

function ProgressWidget:paintTo(bb, x, y)
    local my_size = self:getSize()
    self.dimen = Geom:new{
        x = x, y = y,
        w = my_size.w,
        h = my_size.h
    }
    bb:paintRoundedRect(x, y, my_size.w, my_size.h, self.bgcolor, self.radius)
    bb:paintBorder(x, y, my_size.w, my_size.h,
                    self.bordersize, self.bordercolor, self.radius)
    bb:paintRect(x+self.margin_h, y+self.margin_v+self.bordersize,
                (my_size.w-2*self.margin_h)*self.percentage,
                (my_size.h-2*(self.margin_v+self.bordersize)), self.rectcolor)
    for i=1, #self.ticks do
        local page = self.ticks[i]
        bb:paintRect(
                x + (my_size.w-2*self.margin_h)*(page/self.last),
                y + self.margin_v + self.bordersize, self.tick_width,
                (my_size.h-2*(self.margin_v+self.bordersize)), self.bordercolor)
    end
end

function ProgressWidget:setPercentage(percentage)
    self.percentage = percentage
end

return ProgressWidget