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Code Issues Releases Wiki Activity

trezor/ui/swipe: rework thresholds

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This commit is contained in:
Jan Pochyla 2017-10-06 14:12:21 +02:00
parent 7bbfba1ac0
commit a09e64090c
1 changed files with 10 additions and 27 deletions
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37
src/trezor/ui/swipe.py
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@ -3,10 +3,6 @@ from micropython import const
from trezor import io, ui
from . import contains, rotate
_SWIPE_DISTANCE_THRESHOLD = const(20) # Min pixels in the primary direction
_SWIPE_VELOCITY_THRESHOLD = const(200) # Min pixels per second
_SWIPE_RATIO_THRESHOLD = const(30) # Max ratio or directions in %
SWIPE_UP = const(0x01)
SWIPE_DOWN = const(0x02)
SWIPE_LEFT = const(0x04)
@ -15,6 +11,8 @@ SWIPE_VERTICAL = const(SWIPE_UP | SWIPE_DOWN)
SWIPE_HORIZONTAL = const(SWIPE_LEFT | SWIPE_RIGHT)
SWIPE_ALL = const(SWIPE_VERTICAL | SWIPE_HORIZONTAL)
_SWIPE_DISTANCE = const(120)
def degrees(swipe: int) -> int:
if swipe == SWIPE_UP:
@ -29,13 +27,12 @@ def degrees(swipe: int) -> int:
class Swipe(ui.Widget):
def __init__(self, area=None, absolute=False, directions=SWIPE_ALL):
def __init__(self, area=None, absolute=False, directions=SWIPE_ALL, treshold=80):
self.area = area or (0, 0, ui.SCREEN, ui.SCREEN)
self.absolute = absolute
self.directions = directions
self.treshold = treshold
self.start_pos = None
self.start_time = 0
self.light = None
self.light_origin = None
self.light_target = ui.BACKLIGHT_NONE
@ -44,12 +41,9 @@ class Swipe(ui.Widget):
if not self.absolute:
pos = rotate(pos)
temp_time = utime.ticks_ms() / 1000
if event == io.TOUCH_MOVE and self.start_pos is not None:
pdx = pos[0] - self.start_pos[0]
pdy = pos[1] - self.start_pos[1]
td = temp_time - self.start_time
pdxa = abs(pdx)
pdya = abs(pdy)
@ -59,51 +53,40 @@ class Swipe(ui.Widget):
ui.display.backlight(ui.lerpi(
self.light_origin,
self.light_target,
pdxa / 120 if pdxa < 120 else 1))
pdxa / _SWIPE_DISTANCE if pdxa < _SWIPE_DISTANCE else 1))
elif pdxa < pdya and self.directions & SWIPE_VERTICAL:
# Vertical direction
if (pdy > 0 and self.directions & SWIPE_DOWN) or (pdy < 0 and self.directions & SWIPE_UP):
ui.display.backlight(ui.lerpi(
self.light_origin,
self.light_target,
pdya / 120 if pdya < 120 else 1))
pdya / _SWIPE_DISTANCE if pdya < _SWIPE_DISTANCE else 1))
elif event == io.TOUCH_START and contains(self.area, pos):
self.start_time = temp_time
self.start_pos = pos
self.light_origin = ui.BACKLIGHT_NORMAL
elif event == io.TOUCH_END and self.start_pos is not None:
td = temp_time - self.start_time
pdx = pos[0] - self.start_pos[0]
pdy = pos[1] - self.start_pos[1]
pdxa = abs(pdx)
pdya = abs(pdy)
if pdxa > pdya and self.directions & SWIPE_HORIZONTAL:
# Horizontal direction
velxa = abs(pdx / td)
ratio = int(pdya / pdxa * 100) if pdxa > 0 else 100
if (velxa >= _SWIPE_VELOCITY_THRESHOLD and
pdxa >= _SWIPE_DISTANCE_THRESHOLD and
ratio <= _SWIPE_RATIO_THRESHOLD):
ratio = pdxa / _SWIPE_DISTANCE if pdxa < _SWIPE_DISTANCE else 1
if ratio * 100 >= self.treshold:
if pdx > 0 and self.directions & SWIPE_RIGHT:
return SWIPE_RIGHT
elif pdx < 0 and self.directions & SWIPE_LEFT:
return SWIPE_LEFT
elif pdxa < pdya and self.directions & SWIPE_VERTICAL:
# Vertical direction
velya = abs(pdy / td)
ratio = int(pdxa / pdya * 100) if pdya > 0 else 100
if (velya >= _SWIPE_VELOCITY_THRESHOLD and
pdya >= _SWIPE_DISTANCE_THRESHOLD and
ratio <= _SWIPE_RATIO_THRESHOLD):
ratio = pdya / _SWIPE_DISTANCE if pdya < _SWIPE_DISTANCE else 1
if ratio * 100 >= self.treshold:
if pdy > 0 and self.directions & SWIPE_DOWN:
self.light = None
return SWIPE_DOWN
elif pdy < 0 and self.directions & SWIPE_UP:
self.light = None
return SWIPE_UP
# No swipe, reset the state
self.start_pos = None
self.start_time = 0
ui.display.backlight(self.light_origin)