def blit(self, img, posn, anchor=NW):
"Blit an image to the plot"
if not isinstance(img, Image): img = Image(img)
img.blitTo(self, self.coords(posn), anchor)
def render(self):
# Calculate metrics
w, h = self.size
px, hw = self.metrics
if self._val <= self.min or self.min >= self.max: x = 0
elif self._val >= self.max: x = self.pixels - hw
else: x = round(self.pad + (self._val - self.min) / (self.max - self.min) * px)
if self.vertical: x = self.pixels - 1 - x - hw
# Background
img = Image(self.size, self.bgColor)
pygame.draw.rect(img.surface, self.bgColor, (0,0) + self.size)
# Tick marks
if self.ticks and self.step != None:
n = round((self.max - self.min) / self.step)
tick0 = self.pad + hw / 2
dTick = px / n
y = (w if self.vertical else h) // 2 - 1
for i in range(n+1):
tick = round(tick0 + i * dTick)
p1 = (y, tick) if self.vertical else (tick, y)
p2 = (y+1, tick) if self.vertical else (tick, y+1)
pygame.draw.line(img.surface, self.borderColor, p1, p2, 1)
tick += dTick
# Handle
if self.handle:
r = pygame.Rect(((0, x) + (w, hw)) if self.vertical else (x, 0) + (hw, h))
pygame.draw.rect(img.surface, self.fgColor, r)
r1, r2 = r.bottomleft, r.topright
if self.vertical:
r1, r2 = r2, r1
pygame.draw.line(img.surface, self.borderColor, r.topleft, r1, 1)
pygame.draw.line(img.surface, self.borderColor, r2, r.bottomright, 1)
elif self.vertical:
pygame.draw.rect(img.surface, self.fgColor, (0, x) + (w, h - x))
else:
pygame.draw.rect(img.surface, self.fgColor, (0, 0) + (x, h))
# Handle centre
x += hw // 2
self.handleDecor(x, img.surface, 1 if hw < 25 else 3)
# Text
txt = self.getValueText()
if txt != None:
txt = Image.text(txt, self.font, self.color)
dx = hw // 2 + 8
tw = txt.width
x = x - tw - dx if x + dx + tw + 4 > (h if self.vertical else w) else x + dx
if self.vertical:
txt = Image(pygame.transform.rotate(txt.surface, -90))
x = (0, x)
else: x = (x, 0)
txt.blitTo(img.surface, x)
# Finish up
if self.border: img.borderInPlace(self.border, self.borderColor)
self.imgs = {0: img}