clear background for text overlaid on chart

python-test/lcd.py

@@ -248,8 +248,14 @@ class LCD(framebuf.FrameBuffer):
             self.arc(int(x0), int(y0), int(w), int(w), c_circle, -90, int(v * 360) - 90)
         self.ring(int(x0), int(y0), int(w / 2), c_border)
 
-    def textC(self, s, x, y, c):
-        self.text(s, x - int(len(s) * 8 / 2), y - 5, c)
+    def textC(self, s, x, y, c, bgColor = None):
+        xStart = x - int(len(s) * 8 / 2)
+        yStart = y - 5
+
+        if bgColor != None:
+            self.rect(xStart, yStart - 1, len(s) * 8, 10, bgColor, True)
+
+        self.text(s, xStart, yStart, c)
 
     def textLine(self, s, c, off = 0):
         charsPerLine = int(self.width / 8)

python-test/state_connect.py

@@ -77,6 +77,6 @@ class StateConnect:
                         self.lcd.textC("Connecting...", int(self.lcd.width / 2), int(self.lcd.height / 2), self.lcd.white)
                     else:
                         draw_graph(self.lcd, 0, int(self.iteration * 10), 10)
-                        self.lcd.textC("Fetching parameters...", int(self.lcd.width / 2), int(self.lcd.height / 2) - 10, self.lcd.white)
+                        self.lcd.textC("Fetching parameters...", int(self.lcd.width / 2), int(self.lcd.height / 2) - 10, self.lcd.white, self.lcd.black)
 
         return -1

python-test/state_wait_temp.py

@@ -46,7 +46,7 @@ def draw_graph(lcd, min, val, max):
     ratio = (val - min) / (max - min)
     lcd.pie(lcd.width / 2, lcd.height / 2, lcd.width - 42, lcd.white, c, ratio)
 
-    lcd.textC("{} / {}".format(val, max), int(lcd.width / 2), int(lcd.height / 2), lcd.white)
+    lcd.textC("{} / {}".format(val, max), int(lcd.width / 2), int(lcd.height / 2), lcd.white, lcd.black)
 
 class StateWaitTemp:
     def __init__(self, lcd):