[weather] fix #176 - support negative temp

weather-widget/README.md

@@ -47,7 +47,7 @@ To add your custom icons, create a folder with the pack name under `/icons` and
 
 #### Custom font, icons
 
-![example1](./screenshots/example1.png)
+![example1](./example1.png)
 
 ```lua
 weather_curl_widget({
@@ -65,7 +65,7 @@ weather_curl_widget({
 
 #### Only current weather
 
-![example2](./screenshots/example2.png)
+![example2](./example2.png)
 
 ```lua
 weather_curl_widget({
@@ -74,8 +74,6 @@ weather_curl_widget({
 }),
 ```
 
-
-
 ## Installation
 
 1. Download json parser for lua from [github.com/rxi/json.lua](https://github.com/rxi/json.lua) and place it under **~/.config/awesome/** (don't forget to star a repo <i class="fa fa-github-alt"></i> ):
@@ -126,6 +124,15 @@ weather_curl_widget({
             ...
     ```
 
+## More screenshots
+
+Only negative temperature:
+
+![negative](./negative.png)
+
+Both positive and negative tempertature:
+
+![both](./both.png)
 
 ## How it works
 

weather-widget/weather.lua

@@ -325,12 +325,27 @@ local function worker(args)
             self.min_value = new_min_value
         end
     }
+    local hourly_forecast_negative_graph = wibox.widget {
+        step_width = 12,
+        color = '#5E81AC',
+        background_color = beautiful.bg_normal,
+        forced_height = 100,
+        forced_width = 300,
+        widget = wibox.widget.graph,
+        set_max_value = function(self, new_max_value)
+            self.max_value = new_max_value
+        end,
+        set_min_value = function(self, new_min_value)
+            self.min_value = new_min_value
+        end
+    }
 
     local hourly_forecast_widget = {
         layout = wibox.layout.fixed.vertical,
         update = function(self, hourly)
             local hours_below = {
                 id = 'hours',
+                forced_width = 300,
                 layout = wibox.layout.flex.horizontal
             }
             local temp_below = {
@@ -355,22 +370,36 @@ local function worker(args)
                         widget = wibox.widget.textbox
                     })
                     table.insert(temp_below, wibox.widget {
-                        markup = '<span foreground="#2E3440">' .. string.format('%.0f', hour.temp) .. '°' .. '</span>',
+                        markup = '<span >' .. string.format('%.0f', hour.temp) .. '°' .. '</span>',
                         align = 'center',
                         font = font_name .. ' 9',
                         widget = wibox.widget.textbox
                     })
                 end
             end
-            hourly_forecast_graph:set_max_value(max_temp)
-            hourly_forecast_graph:set_min_value(min_temp * 0.7) -- move graph a bit up
+
+            hourly_forecast_graph:set_max_value(math.max(max_temp, math.abs(min_temp)))
+            hourly_forecast_graph:set_min_value(min_temp > 0 and min_temp * 0.7 or 0) -- move graph a bit up
+
+            hourly_forecast_negative_graph:set_max_value(math.abs(min_temp))
+            hourly_forecast_negative_graph:set_min_value(max_temp < 0 and math.abs(max_temp) * 0.7 or 0)
+
             for i, value in ipairs(values) do
+                print(value)
+                if value >= 0 then
                     hourly_forecast_graph:add_value(value)
+                    hourly_forecast_negative_graph:add_value(0)
+                else
+                    hourly_forecast_graph:add_value(0)
+                    hourly_forecast_negative_graph:add_value(math.abs(value))
+                end
             end
 
             local count = #self
             for i = 0, count do self[i]=nil end
 
+            -- all temperatures are positive
+            if min_temp > 0 then
                 table.insert(self, wibox.widget{
                     {
                         hourly_forecast_graph,
@@ -386,6 +415,56 @@ local function worker(args)
                     layout = wibox.layout.stack
                 })
                 table.insert(self, hours_below)
+
+            -- all temperatures are negative
+            elseif max_temp < 0 then
+                table.insert(self, hours_below)
+                table.insert(self, wibox.widget{
+                    {
+                        hourly_forecast_negative_graph,
+                        reflection = {horizontal = true, vertical = true},
+                        widget = wibox.container.mirror
+                    },
+                    {
+                        temp_below,
+                        valign = 'top',
+                        widget = wibox.container.place
+                    },
+                    id = 'graph',
+                    layout = wibox.layout.stack
+                })
+
+            -- there are both negative and positive temperatures
+            else
+                table.insert(self, wibox.widget{
+                    {
+                        hourly_forecast_graph,
+                        reflection = {horizontal = true},
+                        widget = wibox.container.mirror
+                    },
+                    {
+                        temp_below,
+                        valign = 'bottom',
+                        widget = wibox.container.place
+                    },
+                    id = 'graph',
+                    layout = wibox.layout.stack
+                })
+                table.insert(self, wibox.widget{
+                    {
+                        hourly_forecast_negative_graph,
+                        reflection = {horizontal = true, vertical = true},
+                        widget = wibox.container.mirror
+                    },
+                    {
+                        hours_below,
+                        valign = 'top',
+                        widget = wibox.container.place
+                    },
+                    id = 'graph',
+                    layout = wibox.layout.stack
+                })
+            end
         end
     }