# Released under the MIT License. See LICENSE for details.
#
"""UI functionality for selecting files."""
from __future__ import annotations
import os
import time
import logging
from threading import Thread
from typing import TYPE_CHECKING, override
import bauiv1 as bui
if TYPE_CHECKING:
from typing import Any, Callable, Sequence
[docs]
class FileSelectorWindow(bui.Window):
"""Window for selecting files."""
def __init__(
self,
path: str,
callback: Callable[[str | None], Any] | None = None,
show_base_path: bool = True,
valid_file_extensions: Sequence[str] | None = None,
allow_folders: bool = False,
):
if valid_file_extensions is None:
valid_file_extensions = []
assert bui.app.classic is not None
uiscale = bui.app.ui_v1.uiscale
self._width = 700 if uiscale is bui.UIScale.SMALL else 600
self._x_inset = x_inset = 50 if uiscale is bui.UIScale.SMALL else 0
self._height = 365 if uiscale is bui.UIScale.SMALL else 418
self._callback = callback
self._base_path = path
self._path: str | None = None
self._recent_paths: list[str] = []
self._show_base_path = show_base_path
self._valid_file_extensions = [
'.' + ext for ext in valid_file_extensions
]
self._allow_folders = allow_folders
self._subcontainer: bui.Widget | None = None
self._subcontainerheight: float | None = None
self._scroll_width = self._width - (80 + 2 * x_inset)
self._scroll_height = self._height - 170
self._r = 'fileSelectorWindow'
super().__init__(
root_widget=bui.containerwidget(
size=(self._width, self._height),
transition='in_right',
scale=(
2.23
if uiscale is bui.UIScale.SMALL
else 1.4 if uiscale is bui.UIScale.MEDIUM else 1.0
),
stack_offset=(
(0, -35) if uiscale is bui.UIScale.SMALL else (0, 0)
),
)
)
bui.textwidget(
parent=self._root_widget,
position=(self._width * 0.5, self._height - 42),
size=(0, 0),
color=bui.app.ui_v1.title_color,
h_align='center',
v_align='center',
text=(
bui.Lstr(resource=self._r + '.titleFolderText')
if (allow_folders and not valid_file_extensions)
else (
bui.Lstr(resource=self._r + '.titleFileText')
if not allow_folders
else bui.Lstr(resource=self._r + '.titleFileFolderText')
)
),
maxwidth=210,
)
self._button_width = 146
self._cancel_button = bui.buttonwidget(
parent=self._root_widget,
position=(35 + x_inset, self._height - 67),
autoselect=True,
size=(self._button_width, 50),
label=bui.Lstr(resource='cancelText'),
on_activate_call=self._cancel,
)
bui.widget(edit=self._cancel_button, left_widget=self._cancel_button)
b_color = (0.6, 0.53, 0.63)
self._back_button = bui.buttonwidget(
parent=self._root_widget,
button_type='square',
position=(43 + x_inset, self._height - 113),
color=b_color,
textcolor=(0.75, 0.7, 0.8),
enable_sound=False,
size=(55, 35),
label=bui.charstr(bui.SpecialChar.LEFT_ARROW),
on_activate_call=self._on_back_press,
)
self._folder_tex = bui.gettexture('folder')
self._folder_color = (1.1, 0.8, 0.2)
self._file_tex = bui.gettexture('file')
self._file_color = (1, 1, 1)
self._use_folder_button: bui.Widget | None = None
self._folder_center = self._width * 0.5 + 15
self._folder_icon = bui.imagewidget(
parent=self._root_widget,
size=(40, 40),
position=(40, self._height - 117),
texture=self._folder_tex,
color=self._folder_color,
)
self._path_text = bui.textwidget(
parent=self._root_widget,
position=(self._folder_center, self._height - 98),
size=(0, 0),
color=bui.app.ui_v1.title_color,
h_align='center',
v_align='center',
text=self._path,
maxwidth=self._width * 0.9,
)
self._scrollwidget: bui.Widget | None = None
bui.containerwidget(
edit=self._root_widget, cancel_button=self._cancel_button
)
self._set_path(path)
def _on_up_press(self) -> None:
self._on_entry_activated('..')
def _on_back_press(self) -> None:
if len(self._recent_paths) > 1:
bui.getsound('swish').play()
self._recent_paths.pop()
self._set_path(self._recent_paths.pop())
else:
bui.getsound('error').play()
def _on_folder_entry_activated(self) -> None:
bui.containerwidget(edit=self._root_widget, transition='out_right')
if self._callback is not None:
assert self._path is not None
self._callback(self._path)
def _on_entry_activated(self, entry: str) -> None:
# pylint: disable=too-many-branches
new_path = None
try:
assert self._path is not None
if entry == '..':
chunks = self._path.split('/')
if len(chunks) > 1:
new_path = '/'.join(chunks[:-1])
if new_path == '':
new_path = '/'
else:
bui.getsound('error').play()
else:
if self._path == '/':
test_path = self._path + entry
else:
test_path = self._path + '/' + entry
if os.path.isdir(test_path):
bui.getsound('swish').play()
new_path = test_path
elif os.path.isfile(test_path):
if self._is_valid_file_path(test_path):
bui.getsound('swish').play()
bui.containerwidget(
edit=self._root_widget, transition='out_right'
)
if self._callback is not None:
self._callback(test_path)
else:
bui.getsound('error').play()
else:
print(
(
'Error: FileSelectorWindow found non-file/dir:',
test_path,
)
)
except Exception:
logging.exception(
'Error in FileSelectorWindow._on_entry_activated().'
)
if new_path is not None:
self._set_path(new_path)
class _RefreshThread(Thread):
def __init__(
self, path: str, callback: Callable[[list[str], str | None], Any]
):
super().__init__()
self._callback = callback
self._path = path
@override
def run(self) -> None:
try:
starttime = time.time()
files = os.listdir(self._path)
duration = time.time() - starttime
min_time = 0.1
# Make sure this takes at least 1/10 second so the user
# has time to see the selection highlight.
if duration < min_time:
time.sleep(min_time - duration)
bui.pushcall(
bui.Call(self._callback, files, None),
from_other_thread=True,
)
except Exception as exc:
# Ignore permission-denied.
if 'Errno 13' not in str(exc):
logging.exception('Error in fileselector refresh thread.')
nofiles: list[str] = []
bui.pushcall(
bui.Call(self._callback, nofiles, str(exc)),
from_other_thread=True,
)
def _set_path(self, path: str, add_to_recent: bool = True) -> None:
self._path = path
if add_to_recent:
self._recent_paths.append(path)
self._RefreshThread(path, self._refresh).start()
def _refresh(self, file_names: list[str], error: str | None) -> None:
# pylint: disable=too-many-statements
# pylint: disable=too-many-branches
# pylint: disable=too-many-locals
if not self._root_widget:
return
scrollwidget_selected = (
self._scrollwidget is None
or self._root_widget.get_selected_child() == self._scrollwidget
)
in_top_folder = self._path == self._base_path
hide_top_folder = in_top_folder and self._show_base_path is False
if hide_top_folder:
folder_name = ''
elif self._path == '/':
folder_name = '/'
else:
assert self._path is not None
folder_name = os.path.basename(self._path)
b_color = (0.6, 0.53, 0.63)
b_color_disabled = (0.65, 0.65, 0.65)
if len(self._recent_paths) < 2:
bui.buttonwidget(
edit=self._back_button,
color=b_color_disabled,
textcolor=(0.5, 0.5, 0.5),
)
else:
bui.buttonwidget(
edit=self._back_button,
color=b_color,
textcolor=(0.75, 0.7, 0.8),
)
max_str_width = 300.0
str_width = min(
max_str_width,
bui.get_string_width(folder_name, suppress_warning=True),
)
bui.textwidget(
edit=self._path_text, text=folder_name, maxwidth=max_str_width
)
bui.imagewidget(
edit=self._folder_icon,
position=(
self._folder_center - str_width * 0.5 - 40,
self._height - 117,
),
opacity=0.0 if hide_top_folder else 1.0,
)
if self._scrollwidget is not None:
self._scrollwidget.delete()
if self._use_folder_button is not None:
self._use_folder_button.delete()
bui.widget(edit=self._cancel_button, right_widget=self._back_button)
self._scrollwidget = bui.scrollwidget(
parent=self._root_widget,
position=(
(self._width - self._scroll_width) * 0.5,
self._height - self._scroll_height - 119,
),
size=(self._scroll_width, self._scroll_height),
)
if scrollwidget_selected:
bui.containerwidget(
edit=self._root_widget, selected_child=self._scrollwidget
)
# show error case..
if error is not None:
self._subcontainer = bui.containerwidget(
parent=self._scrollwidget,
size=(self._scroll_width, self._scroll_height),
background=False,
)
bui.textwidget(
parent=self._subcontainer,
color=(1, 1, 0, 1),
text=error,
maxwidth=self._scroll_width * 0.9,
position=(
self._scroll_width * 0.48,
self._scroll_height * 0.57,
),
size=(0, 0),
h_align='center',
v_align='center',
)
else:
file_names = [f for f in file_names if not f.startswith('.')]
file_names.sort(key=lambda x: x[0].lower())
entries = file_names
entry_height = 35
folder_entry_height = 100
show_folder_entry = False
show_use_folder_button = self._allow_folders and not in_top_folder
self._subcontainerheight = entry_height * len(entries) + (
folder_entry_height if show_folder_entry else 0
)
v = self._subcontainerheight - (
folder_entry_height if show_folder_entry else 0
)
self._subcontainer = bui.containerwidget(
parent=self._scrollwidget,
size=(self._scroll_width, self._subcontainerheight),
background=False,
)
bui.containerwidget(
edit=self._scrollwidget,
claims_left_right=False,
claims_tab=False,
)
bui.containerwidget(
edit=self._subcontainer,
claims_left_right=False,
claims_tab=False,
selection_loops=False,
print_list_exit_instructions=False,
)
bui.widget(edit=self._subcontainer, up_widget=self._back_button)
if show_use_folder_button:
self._use_folder_button = btn = bui.buttonwidget(
parent=self._root_widget,
position=(
self._width - self._button_width - 35 - self._x_inset,
self._height - 67,
),
size=(self._button_width, 50),
label=bui.Lstr(
resource=self._r + '.useThisFolderButtonText'
),
on_activate_call=self._on_folder_entry_activated,
)
bui.widget(
edit=btn,
left_widget=self._cancel_button,
down_widget=self._scrollwidget,
)
bui.widget(edit=self._cancel_button, right_widget=btn)
bui.containerwidget(edit=self._root_widget, start_button=btn)
folder_icon_size = 35
for num, entry in enumerate(entries):
cnt = bui.containerwidget(
parent=self._subcontainer,
position=(0, v - entry_height),
size=(self._scroll_width, entry_height),
root_selectable=True,
background=False,
click_activate=True,
on_activate_call=bui.Call(self._on_entry_activated, entry),
)
if num == 0:
bui.widget(edit=cnt, up_widget=self._back_button)
is_valid_file_path = self._is_valid_file_path(entry)
assert self._path is not None
is_dir = os.path.isdir(self._path + '/' + entry)
if is_dir:
bui.imagewidget(
parent=cnt,
size=(folder_icon_size, folder_icon_size),
position=(
10,
0.5 * entry_height - folder_icon_size * 0.5,
),
draw_controller=cnt,
texture=self._folder_tex,
color=self._folder_color,
)
else:
bui.imagewidget(
parent=cnt,
size=(folder_icon_size, folder_icon_size),
position=(
10,
0.5 * entry_height - folder_icon_size * 0.5,
),
opacity=1.0 if is_valid_file_path else 0.5,
draw_controller=cnt,
texture=self._file_tex,
color=self._file_color,
)
bui.textwidget(
parent=cnt,
draw_controller=cnt,
text=entry,
h_align='left',
v_align='center',
position=(10 + folder_icon_size * 1.05, entry_height * 0.5),
size=(0, 0),
maxwidth=self._scroll_width * 0.93 - 50,
color=(
(1, 1, 1, 1)
if (is_valid_file_path or is_dir)
else (0.5, 0.5, 0.5, 1)
),
)
v -= entry_height
def _is_valid_file_path(self, path: str) -> bool:
return any(
path.lower().endswith(ext) for ext in self._valid_file_extensions
)
def _cancel(self) -> None:
bui.containerwidget(edit=self._root_widget, transition='out_right')
if self._callback is not None:
self._callback(None)