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80 lines
2.1 KiB
Python
80 lines
2.1 KiB
Python
import curses
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import typing as T
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from ..util import Choice
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from .base import Widget
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class Menu(Widget):
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def __init__(
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self,
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header: str,
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choices: T.List[Choice],
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scr_height: int,
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scr_width: int,
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) -> None:
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self.header_lines = header.split("\n")
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self.choices = choices
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self.scr_width = scr_width
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self.scr_height = scr_height
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w = max(map(len, self.header_lines))
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h = len(self.header_lines) + 1 + len(choices)
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self._pad: T.Optional[T.Any] = curses.newpad(h, w)
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for y, line in enumerate(self.header_lines):
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self._pad.move(y, 0)
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self._pad.addstr(line)
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self.active_choice = 0
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def stop(self) -> None:
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del self._pad
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self._pad = None
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def getmaxyx(self) -> T.Tuple[int, int]:
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if not self._pad:
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return (0, 0)
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return self._pad.getmaxyx()
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def next(self) -> None:
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self.active_choice = min(len(self.choices) - 1, self.active_choice + 1)
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def prev(self) -> None:
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self.active_choice = max(0, self.active_choice - 1)
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def keypress(self, key: int) -> None:
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for choice in self.choices:
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if key in choice.keys:
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choice.callback()
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return
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if key in set(map(ord, "jJ")) | {curses.KEY_DOWN}:
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self.next()
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return
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if key in set(map(ord, "kK")) | {curses.KEY_UP}:
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self.prev()
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return
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def render(self) -> None:
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if not self._pad:
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return
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for y, choice in enumerate(self.choices):
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self._pad.move(len(self.header_lines) + 1 + y, 0)
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if y == self.active_choice:
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self._pad.standout()
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self._pad.addstr(choice.desc)
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if y == self.active_choice:
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self._pad.standend()
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self._pad.refresh(
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0,
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0,
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(self.scr_height - self._pad.getmaxyx()[0]) // 2,
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(self.scr_width - self._pad.getmaxyx()[1]) // 2,
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self.scr_height - 1,
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self.scr_width - 1,
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)
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