Center temperature and add hot/cold colors

chutney/weather/weather_display.py

@@ -20,7 +20,8 @@ class WeatherDisplay:
             self.symbolDisplay.clearRow(self.topRow)
 
             if self.isTemperatureValid(temperature):
-                self.showTemperature(list(temperature))
+                self.updateColor(temperature)
+                self.showTemperature(temperature)
 
     def getTemperature(self):
         try:
@@ -33,33 +34,57 @@ class WeatherDisplay:
     def isTemperatureValid(self, temperature):
         return not (temperature == 'error' or temperature == 'init' or temperature == 'halted')
 
-    def showTemperature(self, temperature):
-        start = self.getStartColumn(temperature)
-
-        for c in temperature:
-            if c == '-':
-                self.symbolDisplay.displayNegative(
-                    x=start-3,
-                    y=self.topRow,
-                    color=self.color
-                )
+    def updateColor(self, temperature):
+        if int(temperature) > 0:
+            self.color = colors.ORANGE
         else:
-                self.symbolDisplay.displayDigit(
-                    x=start,
-                    y=self.topRow,
-                    digit=c,
-                    color=self.color
-                )
-                start = start + self.digitWidth
+            self.color = colors.BLUE
 
-        self.symbolDisplay.displayDegree(
-            x=start,
-            y=self.topRow,
-            color=self.color
-        )
+    def showTemperature(self, temperature):
+        column = self.getStartColumn(temperature)
+
+        for c in list(temperature):
+            if c == '-':
+                offset = 2 if self.startsWithOne(temperature) else 3
+                self.showNegative(column - offset)
+            else:
+                self.showDigit(column, c)
+                column = column + self.digitWidth
+
+        self.showDegree(column)
 
     def getStartColumn(self, temperature):
-        return self.oneDigitStartColumn if (self.isOneDigit(temperature)) else self.twoDigitStartColumn
+        offset = 1 if self.startsWithOne(temperature) else 0
+        startColumn = self.oneDigitStartColumn if self.isOneDigit(temperature) else self.twoDigitStartColumn
+
+        return startColumn - offset
+
+    def startsWithOne(self, temperature):
+        absoluteTemperature = abs(int(temperature))
+
+        return absoluteTemperature == 1 or absoluteTemperature//10 == 1
 
     def isOneDigit(self, temperature):
-        return (len(temperature) == 2 and temperature[0] == '-') or len(temperature) == 1
+        return abs(int(temperature))//10 == 0
+
+    def showNegative(self, column):
+        self.symbolDisplay.displayNegative(
+            x=column,
+            y=self.topRow,
+            color=self.color
+        )
+
+    def showDigit(self, column, digit):
+        self.symbolDisplay.displayDigit(
+            x=column,
+            y=self.topRow,
+            digit=digit,
+            color=self.color
+        )
+
+    def showDegree(self, column):
+        self.symbolDisplay.displayDegree(
+            x=column,
+            y=self.topRow,
+            color=self.color
+        )