progressbar: fix infill offset in bookstatus

frontend/ui/widget/progresswidget.lua

@@ -1,10 +1,36 @@
+--[[--
+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
+
+Example:
+
+    local foo_bar = ProgressWidget:new{
+        width = 400,
+        height = 10,
+        percentage = 50/100,
+    }
+    UIManager:show(foo_bar)
+
+]]
+
 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,
@@ -16,7 +42,7 @@ local ProgressWidget = Widget:new{
     bgcolor = Blitbuffer.COLOR_WHITE,
     rectcolor = Blitbuffer.gray(0.7),
     percentage = nil,
-    ticks = {},
+    ticks = nil,
     tick_width = 3,
     last = nil,
 }
@@ -32,18 +58,26 @@ function ProgressWidget:paintTo(bb, x, y)
         w = my_size.w,
         h = my_size.h
     }
+    -- fill background
     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(
+    -- 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 then
+        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)
+                y + self.margin_v + self.bordersize,
+                self.tick_width,
+                my_size.h-2*(self.margin_v+self.bordersize),
+                self.bordercolor)
+        end
     end
 end