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On this page
  • Introduction
  • Function signature
  • Parameters
  • files_list
  • selection_type
  • extended_selection
  • widget_id
  • Methods and attributes
  • Mini App Example
  • Import libraries
  • Init API client
  • Get Team ID from environment variables
  • Prepare file pathes
  • Initialize FileViewer widget
  • Create Text widgets we will use
  • Create app layout
  • Create app using layout
  • Add function to control widgets from python code

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  1. App development
  2. Widgets
  3. Selection

FileViewer

PreviousTeamFilesSelectorNextDropdown

Last updated 1 year ago

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Introduction

FileViewer widget in Supervisely is a useful tool for inspecting and easily navigation through files in specific directory in Team files.

Function signature

FileViewer(
    files_list=files_list,
    selection_type=None,
    extended_selection=False,
    widget_id=None,
)
default

Parameters

Parameters
Type
Description

files_list

List[dict]

List of dicts with files and folders info

selection_type

Literal[None, "file", "folder"]

Type of data to select

extended_selection

bool

If True method get_selected_items() returns a list of dict's, instead of list with paths

widget_id

str

ID of the widget

files_list

Determine pathes to files.

type: List[dict]

files = api.file.list(team_id, path)
tree_items = []
for file in files:
    path = file["path"]
    tree_items.append({"path": path})


file_viewer = FileViewer(files_list=tree_items)

selection_type

Type of data to select. If set to 'file' - only files can be selected, if set to 'folder' - only folders can be selected. If set to None - both files and folders can be selected.

type: Literal[None, "file", "folder"]

default value: None

file_viewer = FileViewer(
    files_list=tree_items,
    selection_type="file",
)

extended_selection

If True method get_selected_items() returns a list of dict's, instead of list with paths.

type: bool

default value: False

file_viewer = FileViewer(
    files_list=tree_items,
    extended_selection=True,
)

file = file_viewer.get_selected_path()
print(file)

>>> {"path": "some/path", "type": "file or folder"}

widget_id

ID of the widget.

type: str

default value: None

Methods and attributes

Attributes and Methods
Description

loading

Get or set loading property.

get_selected_items()

Return selected items.

get_current_path()

Return current path to files.

update_file_tree(files_list: List[dict])

Update files tree by given files list.

@path_changed

Decorator function is handled then input path changed.

@value_changed

Decorator function is handled then input value changed.

Mini App Example

You can find this example in our Github repository:

Import libraries

import os
import supervisely as sly
from dotenv import load_dotenv
from supervisely.app.widgets import FileViewer, Container, Card, Text

Init API client

First, we load environment variables with credentials and init API for communicating with Supervisely Instance:

load_dotenv("local.env")
load_dotenv(os.path.expanduser("~/supervisely.env"))

api = sly.Api()

Get Team ID from environment variables

team_id = sly.env.team_id()

Prepare file pathes

path = "/"  # root of Team Files or specify your directory

files = api.file.list(team_id, path)
tree_items = []
for file in files:
    path = file["path"]
    tree_items.append({"path": path, "size": file["meta"]["size"]})

Initialize FileViewer widget

file_viewer = FileViewer(files_list=tree_items)

Create Text widgets we will use

selected_values = Text()
curr_path = Text()

Create app layout

Prepare a layout for app using Card widget with the content parameter and place widget that we've just created in the Container widget.

layout = Card(
    content=Container(widgets=[curr_path, selected_values, file_viewer]),
    title="File Viewer",
)

Create app using layout

Create an app object with layout parameter.

app = sly.Application(layout=layout)

Add function to control widgets from python code

@file_viewer.path_changed
def refresh_tree(current_path):
    curr_path.set(
        text=f"Current path: {current_path}",
        status="text",
    )


@file_viewer.value_changed
def print_selected(selected_items):
    selected_values.set(
        text=f"Selected items: {', '.join(selected_items)}",
        status="text",
    )
default

layout
🔥
supervisely-ecosystem/ui-widgets-demos/selection/013_file_viewer/src/main.py