[elbe-devel] [PATCH 04/14] Debianize - Button widget

[Bastian Germann]

> From: Olivier Dion <dion at linutronix.de>
> 
> A simple and clean button widget.
> 
> The button ctor takes 3 arguments.
> 
> * text
> 
>   The text to show in the button.
> 
> * palette
> 
>   A valid palette name to apply on the button.  See TUI::palette.
> 
> * callback
> 
>   The callback to call when the button is clicked.
> 
> Signed-off-by: Olivier Dion <dion at linutronix.de>

Please move the description to the file as pydoc.

> ---
>  elbepack/debianize/widgets/button.py | 44 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 44 insertions(+)
>  create mode 100644 elbepack/debianize/widgets/button.py
> 
> diff --git a/elbepack/debianize/widgets/button.py b/elbepack/debianize/widgets/button.py
> new file mode 100644
> index 00000000..e3cd08ab
> --- /dev/null
> +++ b/elbepack/debianize/widgets/button.py
> @@ -0,0 +1,44 @@
> +# ELBE - Debian Based Embedded Rootfilesystem Builder
> +# Copyright (c) 2019 Olivier Dion <dion at linutronix.de>
> +#
> +# SPDX-License-Identifier: GPL-3.0-or-later
> +
> +
> +from collections import Callable
> +
> +from urwid import (
> +    AttrMap,
> +    LineBox,
> +    Text,
> +    WidgetWrap,
> +    connect_signal,
> +    emit_signal
> +)
> +
> +from elbepack.debianize.base.signal import SignalType
> +
> +
> +class Button(WidgetWrap):
> +
> +    signals = [SignalType.CLICK]
> +
> +    def __init__(self, text: str, palette: str, callback: Callable):
> +        widget = LineBox(AttrMap(Text("[{}]".format(text), align="center"), "default", palette))
> +        super().__init__(widget)
> +        connect_signal(self, SignalType.CLICK, callback)
> +
> +        # Very important!  This is not documented in urwid's
> +        # documentation!  Without this, the button would only text.
> +        self._w.base_widget._selectable = True
> +
> +    def keypress(self, size, key):
> +        if key == "enter":
> +            emit_signal(self, SignalType.CLICK)
> +            return None
> +        return key
> +
> +    def mouse_event(self, size, event, button, col, row, focus):
> +        if focus and event == "mouse release":
> +            emit_signal(self, SignalType.CLICK)
> +            return True
> +        return False
>