70 lines
2 KiB
Python
70 lines
2 KiB
Python
# TODO remove testing code and clean up
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import datetime
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import time
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from typing import Optional, Tuple, TypeVar
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import urwid
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from .attributed_lines_widget import AttributedLinesWidget
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from .cursor_rendering import CursorTreeRenderer
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from .element import Element, Message
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__all__ = ["CursorTreeWidget"]
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E = TypeVar("E", bound=Element)
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class CursorTreeWidget(urwid.WidgetWrap):
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"""
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This widget draws a CursorTree and moves the cursor around.
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"""
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def __init__(self, tree: CursorTreeRenderer[E]) -> None:
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self._tree = tree
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self._lines = AttributedLinesWidget()
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super().__init__(self._lines)
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self._tree._cursor_id = "->3->2->3"
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def render(self, size: Tuple[int, int], focus: bool) -> None:
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width, height = size
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self._tree.render(width, height)
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self._lines.set_lines(self._tree.lines)
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return super().render(size, focus)
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def selectable(self) -> bool:
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return True
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def keypress(self, size: Tuple[int, int], key: str) -> Optional[str]:
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if key == "shift up":
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self._tree.scroll(1)
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self._invalidate()
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elif key == "shift down":
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self._tree.scroll(-1)
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self._invalidate()
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elif key == "shift right":
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self.scroll_horizontally(1)
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elif key == "shift left":
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self.scroll_horizontally(-1)
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elif key in {"home", "shift home"}:
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self._lines.horizontal_offset = 0
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self._invalidate()
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else:
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t = datetime.datetime(2019,5,7,13,25,6)
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self._tree._supply.add(Message(
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str(time.time()),
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self._tree._cursor_id,
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t,
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"key",
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key,
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))
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self._invalidate()
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return None
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def scroll_horizontally(self, offset: int) -> None:
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self._lines.horizontal_offset = max(0,
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self._lines.horizontal_offset + offset)
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self._invalidate()
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