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109 lines
3.3 KiB
Python
109 lines
3.3 KiB
Python
"""
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Collection of reusable components for building full screen applications.
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"""
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from __future__ import annotations
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from typing import Sequence
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from prompt_toolkit.filters import has_completions, has_focus
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from prompt_toolkit.formatted_text import AnyFormattedText
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from prompt_toolkit.key_binding.bindings.focus import focus_next, focus_previous
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from prompt_toolkit.key_binding.key_bindings import KeyBindings
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from prompt_toolkit.layout.containers import (
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AnyContainer,
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DynamicContainer,
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HSplit,
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VSplit,
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)
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from prompt_toolkit.layout.dimension import AnyDimension
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from prompt_toolkit.layout.dimension import Dimension as D
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from .base import Box, Button, Frame, Shadow
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__all__ = [
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"Dialog",
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]
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class Dialog:
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"""
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Simple dialog window. This is the base for input dialogs, message dialogs
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and confirmation dialogs.
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Changing the title and body of the dialog is possible at runtime by
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assigning to the `body` and `title` attributes of this class.
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:param body: Child container object.
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:param title: Text to be displayed in the heading of the dialog.
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:param buttons: A list of `Button` widgets, displayed at the bottom.
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"""
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def __init__(
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self,
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body: AnyContainer,
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title: AnyFormattedText = "",
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buttons: Sequence[Button] | None = None,
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modal: bool = True,
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width: AnyDimension = None,
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with_background: bool = False,
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) -> None:
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self.body = body
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self.title = title
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buttons = buttons or []
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# When a button is selected, handle left/right key bindings.
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buttons_kb = KeyBindings()
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if len(buttons) > 1:
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first_selected = has_focus(buttons[0])
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last_selected = has_focus(buttons[-1])
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buttons_kb.add("left", filter=~first_selected)(focus_previous)
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buttons_kb.add("right", filter=~last_selected)(focus_next)
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frame_body: AnyContainer
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if buttons:
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frame_body = HSplit(
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[
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# Add optional padding around the body.
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Box(
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body=DynamicContainer(lambda: self.body),
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padding=D(preferred=1, max=1),
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padding_bottom=0,
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),
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# The buttons.
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Box(
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body=VSplit(buttons, padding=1, key_bindings=buttons_kb),
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height=D(min=1, max=3, preferred=3),
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),
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]
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)
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else:
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frame_body = body
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# Key bindings for whole dialog.
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kb = KeyBindings()
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kb.add("tab", filter=~has_completions)(focus_next)
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kb.add("s-tab", filter=~has_completions)(focus_previous)
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frame = Shadow(
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body=Frame(
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title=lambda: self.title,
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body=frame_body,
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style="class:dialog.body",
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width=(None if with_background is None else width),
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key_bindings=kb,
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modal=modal,
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)
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)
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self.container: Box | Shadow
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if with_background:
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self.container = Box(body=frame, style="class:dialog", width=width)
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else:
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self.container = frame
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def __pt_container__(self) -> AnyContainer:
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return self.container
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