def show(self):
tft = self.tft
width = self.width
dx = 5
x0 = self.x0
x1 = self.x1
y0 = self.y0
y1 = self.y1
height = y1 - y0
if self.divisions > 0:
dy = height / (self.divisions) # Tick marks
for tick in range(self.divisions + 1):
ypos = int(y0 + dy * tick)
tft.draw_hline(x0, ypos, dx, self.fgcolor)
tft.draw_hline(x1 - dx, ypos, dx, self.fgcolor)
if self.legends is not None and self.font is not None: # Legends
if len(self.legends) <= 1:
dy = 0
else:
dy = height / (len(self.legends) - 1)
yl = self.y1 # Start at bottom
for legend in self.legends:
print_centered(tft, int(self.x0 + self.width / 2), int(yl),
legend, self.fontcolor, self.font)
yl -= dy
if self.ptr_y is not None: # Restore background if it was saved
tft.setXY(x0, self.ptr_y, x1, self.ptr_y)
TFT_io.tft_write_data_AS(self.ptrbuf, self.ptrbytes)
self.ptr_y = int(self.y1 -
self._value * height) # y position of slider
tft.setXY(x0, self.ptr_y, x1, self.ptr_y) # Read background
TFT_io.tft_read_cmd_data_AS(0x2e, self.ptrbuf, self.ptrbytes)
tft.draw_hline(x0, self.ptr_y, width,
self.pointercolor) # Draw pointer
def render_bg(self, tft):
if self.slide_y is not None:
tft.setXY(*self.slide_coords())
TFT_io.tft_write_data_AS(self.slidebuf, self.slidebytes)