fry-qt6-io-widget

A reusable PyQt6 widget for picking input and output paths.

Four I/O modes out of the box:

Mode	Input	Output	Example use case
A	Folder	Folder	Batch image processing
B	Folder	File	Aggregate a directory into one report
C	File	Folder	Extract / decompose an archive
D	File	File	One-shot conversion (md → html)

Built-in features:

• Drag-and-drop a file or folder onto the input box
• Live path validity check (✓ exists / ○ will be created / ✗ invalid)
• Auto-sync: output path is generated from input path (postfix + optional timestamp)
• Safe browse-dialog fallback when a typed path no longer exists
• Freeze-proof browse dialog: always uses Qt's non-native QFileDialog (never the Windows shell dialog, which can hang on disconnected network drives), prettified and with a curated local-only sidebar
• Opens the input/output location in the OS file manager
• get_params_dict() / load_params_dict() for trivial persistence
• Ships as a QWidget — wrap it in a QDockWidget yourself if you need that (see examples/example_dock_wrapper.py)

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Install

pip install fry-qt6-io-widget

Requires Python 3.8+, PyQt6 ≥ 6.2, and QtAwesome ≥ 1.2.

Quick start

import sys
from PyQt6.QtWidgets import QApplication, QMainWindow
from fry_qt6_io_widget import FryIOWidget, IOMode

app = QApplication(sys.argv)
win = QMainWindow()

widget = FryIOWidget(mode=IOMode.FOLDER_TO_FOLDER)
win.setCentralWidget(widget)

widget.input_path_changed.connect(lambda p: print("in:", p))
widget.output_path_changed.connect(lambda p: print("out:", p))

win.show()
sys.exit(app.exec())

Pick a mode

FryIOWidget(mode=IOMode.FOLDER_TO_FOLDER)   # A
FryIOWidget(mode=IOMode.FOLDER_TO_FILE)     # B
FryIOWidget(mode=IOMode.FILE_TO_FOLDER)     # C
FryIOWidget(mode=IOMode.FILE_TO_FILE)       # D

Or switch at runtime:

widget.set_mode(IOMode.FILE_TO_FILE)

Use it as a dock

The package intentionally ships only a QWidget. Wrapping it in a dock is three lines:

from PyQt6.QtWidgets import QDockWidget
from PyQt6.QtCore import Qt

dock = QDockWidget("输入输出", main_window)
dock.setWidget(FryIOWidget(mode=IOMode.FOLDER_TO_FOLDER))
main_window.addDockWidget(Qt.DockWidgetArea.LeftDockWidgetArea, dock)

A complete runnable example is in examples/example_dock_wrapper.py.

Useful options

FryIOWidget(
    mode=IOMode.FOLDER_TO_FILE,
    output_path_postfix="_report",          # appended to the auto-generated output
    output_use_timestamp=True,              # also append HHMMSS_mmm
    input_file_filter="Images (*.png *.jpg);;All (*)",
    output_file_filter="CSV (*.csv)",
    default_output_extension=".csv",        # used in modes B and D
)

Helpful methods

widget.get_input_path()                     # -> str
widget.get_output_path()                    # -> str
widget.set_input_path("/some/path")
widget.set_output_path("/elsewhere")

widget.get_params_dict()                    # serialise current state
widget.load_params_dict(params)             # restore it

widget.create_output_folder_if_needed()     # mkdir -p for the output directory
widget.compute_auto_output_path("/foo")     # preview what auto-sync would generate

Signals

Signal	Payload	When
input_path_changed	str	input text changes
output_path_changed	str	output text changes

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Examples

Five runnable examples are in examples/:

• example_a_folder_to_folder.py — mode A
• example_b_folder_to_file.py — mode B
• example_c_file_to_folder.py — mode C
• example_d_file_to_file.py — mode D
• example_mode_switcher.py — switch modes via combobox
• example_dock_wrapper.py — wrap into a QDockWidget

Run any of them:

python examples/example_a_folder_to_folder.py

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Core concepts

For internals (auto-sync rules, path-validity states, how each mode re-uses the same UI), see docs/CORE_CONCEPTS.md.

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Development

git clone https://gitlab.com/fanrenyi33/fry_python_lib_d130_fry_qt6_io_widget.git
cd fry_python_lib_d130_fry_qt6_io_widget
pip install -e ".[dev]"
pytest

To build distributions:

python -m build
# dist/fry_qt6_io_widget-0.1.5-py3-none-any.whl
# dist/fry_qt6_io_widget-0.1.5.tar.gz

License

MIT — see LICENSE.