def refreshCanvas(self):
"""
create the canvas for this text layer on top of image layers.
calls the base class refreshCanvas() method first
:return Nothing: the text buffer is written to the Panel
"""
# lay down background color/images etc first
super(TextAnimBase, self).refreshCanvas()
# text is drawn on the top of previous layers
h, w = self.font.getFontBbox()
x, y = self.origin if self.origin is not None else (0, 0)
print "TextAnimbase.refreshCanvas() origin", self.origin
if self.bottomLeftOrigin:
h, w = self.textBuffer.shape[:2]
y = y - h
# set alpha
# textAlpha is in range 0->1.0
# multiply current settings
# no point bothering if alpha is zero
if self.textAlpha > 0:
# multiply all alphas by textAlpha to retain relative transparency
im = self.textBuffer.copy()
im[:, :, 3] = im[:, :, 3].astype(float) * self.textAlpha
Panel.DrawImage(x, y, im)
def _run(self):
self.busy = True
self.startTime = time.time()
while self.busy:
if time.time() - self.startTime >= self.duration:
break
self.Xpos = self.Xpos + self.xStep
self.Ypos = self.Ypos + self.yStep
Panel.DrawImage(self.Xpos, self.Ypos, self.img)
# has no effect on speed
time.sleep(self.loopDelay)
self.busy = False