kopia lustrzana https://github.com/peterhinch/micropython-samples
45 wiersze
1.3 KiB
Python
45 wiersze
1.3 KiB
Python
# ui.py Base classes and utilities for TFT GUI
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CIRCLE = 1
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RECTANGLE = 2
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CLIPPED_RECT = 3
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def get_stringsize(s, font):
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hor = 0
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for c in s:
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_, vert, cols = font.get_ch(ord(c))
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hor += cols
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return hor, vert
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def print_centered(tft, x, y, s, color, font):
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length, height = get_stringsize(s, font)
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tft.setTextStyle(color, None, 2, font)
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tft.setTextPos(x - length // 2, y - height // 2)
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tft.printString(s)
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# Base class for touch-enabled classes.
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class touchable(object):
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touchlist = []
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objtouch = None
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@classmethod
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def touchtest(cls): # Singleton thread tests all touchable instances
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mytouch = cls.objtouch
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while True:
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yield
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if mytouch.ready:
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x, y = mytouch.get_touch_async()
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for obj in cls.touchlist:
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if obj.enabled:
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obj.touched(x, y)
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elif not mytouch.touched:
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for obj in cls.touchlist:
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obj.untouched()
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def __init__(self, objsched, objtouch):
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touchable.touchlist.append(self)
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self.enabled = True # Available to user/subclass
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if touchable.objtouch is None: # Initialising class and thread
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touchable.objtouch = objtouch
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objsched.add_thread(self.touchtest()) # One thread only
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