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Merge pull request #480 from trezor/tsusanka/numpad
NumPad to enter a number from arbitrary range easily
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commit
edb8177f1a
47
src/trezor/ui/num_pad.py
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47
src/trezor/ui/num_pad.py
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from trezor import ui
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from trezor.ui import display
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from trezor.ui.button import BTN_CLICKED, Button
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ITEMS_PER_PAGE = 11
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def digit_area(i):
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return ui.grid(i + 3) # skip the first line
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class NumPad(ui.Widget):
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def __init__(self, label: str, start: int, end: int):
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"""
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Generates a numpad with numbers from `start` to `end` excluding.
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"""
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self.label = label
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self.start = start
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self.end = end
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self.page = 0
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self._generate_buttons()
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def render(self):
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for btn in self.buttons:
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btn.render()
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# header label
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display.text_center(ui.WIDTH // 2, 36, self.label, ui.BOLD, ui.GREY, ui.BG)
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def touch(self, event, pos):
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for btn in self.buttons:
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if btn.touch(event, pos) == BTN_CLICKED:
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if "+" in btn.content:
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self.page += 1
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self._generate_buttons()
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else:
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return btn.content
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def _generate_buttons(self):
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display.clear() # we need to clear old buttons
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start = self.start + (ITEMS_PER_PAGE + 1) * self.page - self.page
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end = min(self.end, (ITEMS_PER_PAGE + 1) * (self.page + 1) - self.page)
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digits = list(range(start, end))
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if len(digits) == ITEMS_PER_PAGE:
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digits.append(str(end) + "+")
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self.buttons = [Button(digit_area(i), str(d)) for i, d in enumerate(digits)]
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