def update_plt(self, dpi=163, waitForLock=False):
'''re-draw the plot in a background thread
set dpi low for fast drawing.
if waitForLock is False, and lock cannot be aquired (already rendering), then return immediately. otherwise, wait (i.e when motion has ended)
TODO: use pan/pinch velocity to control the dpi.
'''
if waitForLock:
self.ready.acquire()
try:
# set axes limits
lims = self.compute_lims()
plt.xlim(lims[0])
plt.ylim(lims[1])
self.update_plot_data()
# render image
self.b.seek(0)
plt.savefig(self.b, format='jpg', dpi=dpi)
self.img_view.image = ui.Image.from_data(self.b.getvalue())
finally:
try:
self.panx0 = self.pany0 = 0
self.sx0 = 1. / self.sx
self.sy0 = 1. / self.sy
self.img_view.transform = ui.Transform()
self.ready.release()
except:
pass
def main():
r, t = is_running()
if r:
return
v = ui.load_view('brightness')
v.t = t
import math
s = v['slider']
s.transform = ui.Transform().rotation(math.radians(-90))
v.present('full_screen',
hide_close_button=True,
hide_title_bar=True,
orientations=['portrait'])
set_brightness_value(lambda x: x, v)
def anim(): self.buttonView.transform = ui.Transform().rotation((pi/2*self.angle))
def a():
v.transform = ui.Transform() #default
v.alpha = 1
def applyScale(self):
self.wv.transform = ui.Transform().scale(self.sx, self.sx)
def a(): v.transform=ui.Transform()
def a():
sender.transform = ui.Transform()
def __init__(self):
'''set up this view containing a rotated slider. the key is to set x,y=0 after rotation'''
self.slider=ui.Slider()
self.add_subview(self.slider)
self.slider.transform=ui.Transform().rotation(math.radians(90))
self.slider.x=self.slider.y=0
def ani():
self.obj.transform = ui.Transform()
