fixed graph grid display

raspberry-pi/gui/graph.py

@@ -28,19 +28,21 @@ class Graph(tk.Canvas):
     self.bind("<Configure>", self.on_resize)
 
   def drawBackground(self):
-    self.bg = Image.new('RGB', (self.width, self.height), (0,20,0))
+    self.bg = Image.new('RGB', (self.width, self.height), (0,10,0))
     draw = ImageDraw.Draw(self.bg)
     # draw x and y axis
     axes = self.pointToCoord((0, 0))
     draw.line([(0, axes[1]), (self.width, axes[1])], (60,127,127), self.lineWidth)
     draw.line([(axes[0], 0), (axes[0], self.height)], (60,127,127), self.lineWidth)
-
-    # draw ticks
     for p in range(self.scale[0], self.scale[1], 10**int(math.log10(self.scale[1]-self.scale[0]))):
       tickPosX = self.pointToCoord((p, 0))
       tickPosY = self.pointToCoord((0, p))
-      draw.line([(tickPosX[0], tickPosX[1]+self.lineWidth*300), (tickPosX[0], tickPosX[1]-self.lineWidth*300)], (60,127,127), int(self.lineWidth/2))
-      draw.line([(tickPosY[0]+self.lineWidth*300, tickPosY[1]), (tickPosY[0]-self.lineWidth*300, tickPosY[1])], (60,127,127), int(self.lineWidth/2))
+      #draw grid
+      draw.line([(tickPosX[0], self.height), (tickPosX[0], 0)], (60,127,60), 1)
+      draw.line([(self.width, tickPosY[1]), (0, tickPosY[1])], (60,127,60), 1)
+      # draw ticks
+      draw.line([(tickPosX[0], tickPosX[1]+self.lineWidth*3), (tickPosX[0], tickPosX[1]-self.lineWidth*3)], (60,127,100), int(self.lineWidth/2))
+      draw.line([(tickPosY[0]+self.lineWidth*3, tickPosY[1]), (tickPosY[0]-self.lineWidth*3, tickPosY[1])], (60,127,100), int(self.lineWidth/2))
       # draw tick labels
       draw.text((tickPosX[0]+3, tickPosX[1]+self.lineWidth*4), str(p) + " mm", font=self.font)
       if p != 0: