Added new volume widget

widgets/dotgrid.lua

@@ -0,0 +1,137 @@
+local dotgrid = {}
+
+function dotgrid:shuffle(tbl)
+	for i = #tbl, 2, -1 do
+		local j = math.random(i)
+		tbl[i], tbl[j] = tbl[j], tbl[i]
+	end
+	return tbl
+end
+
+function dotgrid:new()
+	local dots = wibox.widget.base.make_widget();
+
+	dots.on_color = {1, 0, 0}
+	dots.off_color = {0.5, 0, 0}
+	dots.value = 0
+	dots.max = 100
+	dots.rows = 5
+	dots.cols = 5
+	dots.spacing = 2
+
+	dots.map = {}
+	local idx
+	for i=1, dots.rows*dots.cols do
+		dots.map[i] = false;
+	end
+	--dots.map = dotgrid:shuffle(dots.map)
+
+
+	function dots:fit(context, width, height)
+		local m = math.min(width, height)
+		return m, m
+	end
+
+	function dots:draw(context, cr, width, height)
+		local col_size = (height - self.spacing * (self.rows-1)) // self.rows
+		local row_size = (width - self.spacing * (self.cols-1)) // self.cols
+
+		-- Compute rounding offsets for better centering
+		local xoffset = (
+			width - (
+				(col_size * self.cols) +
+				(self.spacing * (self.cols - 1))
+			)
+		) // 2
+
+		local yoffset = (
+			height - (
+				(row_size * self.rows) +
+				(self.spacing * (self.rows - 1))
+			)
+		) // 2
+
+		-- How many dots should be on
+		local on = math.floor((self.value / self.max) * (self.rows * self.cols))
+
+		-- How many dote are currently on
+		local current_value = 0
+		for i=1, dots.rows*dots.cols do
+			if dots.map[i] then
+				current_value = current_value + 1
+			end
+		end
+
+		local change, remove
+		if current_value ~= on then
+			change = on - current_value
+			remove = change < 0
+			change = math.abs(change)
+
+			local flip
+			for i=1, change do
+				if remove then
+					-- Flip the nth on dot
+					flip = math.random(1, current_value)
+					for i=1, dots.rows*dots.cols do
+						if dots.map[i] then
+							if flip == 1 then
+								dots.map[i] = false
+								break
+							else 
+								flip = flip - 1
+							end
+						end
+					end
+					current_value = current_value - 1
+				else
+					-- Flip the nth off dot
+					flip = math.random(1, dots.rows*dots.cols - current_value)
+					for i=1, dots.rows*dots.cols do
+						if not dots.map[i] then
+							if flip == 1 then
+								dots.map[i] = true
+								break
+							else 
+								flip = flip - 1
+							end
+						end
+					end
+					current_value = current_value + 1
+				end
+			end
+
+		end
+
+		for r=1, self.rows do
+			for c=1, self.cols do
+				idx = c + ((r-1)*self.cols)
+
+				--idx_mapped = self.map[idx] - 1
+				--r_mapped = (idx_mapped % self.rows) + 1
+				--c_mapped = (idx_mapped // self.cols) + 1
+
+				cr:new_path();
+				if self.map[idx] then
+					cr:set_source_rgb(self.on_color[1], self.on_color[2], self.on_color[3])
+				else
+					cr:set_source_rgb(self.off_color[1], self.off_color[2], self.off_color[3])
+				end
+
+				cr:rectangle(
+					(c-1) * (col_size + self.spacing) + xoffset,
+					(r-1) * (row_size + self.spacing) + yoffset,
+					col_size,
+					row_size
+				)
+				cr:fill()
+			end
+		end
+
+		
+	end
+
+	return dots
+end
+
+return dotgrid