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FileChooser

The FileChooser module provides various classes for describing, displaying and browsing file systems.

Simple widgets

There are two ready-to-use widgets that provide views of the file system. Each of these present the files and folders in a different style.

The FileChooserListView displays file entries as text items in a vertical list, where folders can be collapsed and expanded.

_images/filechooser_list.png

The FileChooserIconView presents icons and text from left to right, wrapping them as required.

_images/filechooser_icon.png

They both provide for scrolling, selection and basic user interaction. Please refer to the FileChooserController for details on supported events and properties.

Widget composition

FileChooser classes adopt a MVC design. They are exposed so that you to extend and customize your file chooser according to your needs.

The FileChooser classes can be categorized as follows:

This means you can define your own views or provide FileSystemAbstract implementations for alternative file systems for use with these widgets. The FileChooser can be used as a controller for handling multiple, synchronized views of the same path. By combining these elements, you can add your own views and file systems and have them easily interact with the existing components.

Usage example

main.py

from kivy.app import App
from kivy.uix.floatlayout import FloatLayout
from kivy.factory import Factory
from kivy.properties import ObjectProperty
from kivy.uix.popup import Popup

import os


class LoadDialog(FloatLayout):
    load = ObjectProperty(None)
    cancel = ObjectProperty(None)


class SaveDialog(FloatLayout):
    save = ObjectProperty(None)
    text_input = ObjectProperty(None)
    cancel = ObjectProperty(None)


class Root(FloatLayout):
    loadfile = ObjectProperty(None)
    savefile = ObjectProperty(None)
    text_input = ObjectProperty(None)

    def dismiss_popup(self):
        self._popup.dismiss()

    def show_load(self):
        content = LoadDialog(load=self.load, cancel=self.dismiss_popup)
        self._popup = Popup(title="Load file", content=content,
                            size_hint=(0.9, 0.9))
        self._popup.open()

    def show_save(self):
        content = SaveDialog(save=self.save, cancel=self.dismiss_popup)
        self._popup = Popup(title="Save file", content=content,
                            size_hint=(0.9, 0.9))
        self._popup.open()

    def load(self, path, filename):
        with open(os.path.join(path, filename[0])) as stream:
            self.text_input.text = stream.read()

        self.dismiss_popup()

    def save(self, path, filename):
        with open(os.path.join(path, filename), 'w') as stream:
            stream.write(self.text_input.text)

        self.dismiss_popup()


class Editor(App):
    pass


Factory.register('Root', cls=Root)
Factory.register('LoadDialog', cls=LoadDialog)
Factory.register('SaveDialog', cls=SaveDialog)


if __name__ == '__main__':
    Editor().run()

editor.kv

#:kivy 1.1.0

Root:
    text_input: text_input

    BoxLayout:
        orientation: 'vertical'
        BoxLayout:
            size_hint_y: None
            height: 30
            Button:
                text: 'Load'
                on_release: root.show_load()
            Button:
                text: 'Save'
                on_release: root.show_save()

        BoxLayout:
            TextInput:
                id: text_input
                text: ''

            RstDocument:
                text: text_input.text
                show_errors: True

<LoadDialog>:
    BoxLayout:
        size: root.size
        pos: root.pos
        orientation: "vertical"
        FileChooserListView:
            id: filechooser

        BoxLayout:
            size_hint_y: None
            height: 30
            Button:
                text: "Cancel"
                on_release: root.cancel()

            Button:
                text: "Load"
                on_release: root.load(filechooser.path, filechooser.selection)

<SaveDialog>:
    text_input: text_input
    BoxLayout:
        size: root.size
        pos: root.pos
        orientation: "vertical"
        FileChooserListView:
            id: filechooser
            on_selection: text_input.text = self.selection and self.selection[0] or ''

        TextInput:
            id: text_input
            size_hint_y: None
            height: 30
            multiline: False

        BoxLayout:
            size_hint_y: None
            height: 30
            Button:
                text: "Cancel"
                on_release: root.cancel()

            Button:
                text: "Save"
                on_release: root.save(filechooser.path, text_input.text)

New in version 1.0.5.

Changed in version 1.2.0: In the chooser template, the controller is no longer a direct reference but a weak-reference. If you are upgrading, you should change the notation root.controller.xxx to root.controller().xxx.

class kivy.uix.filechooser.FileChooserListView(**kwargs)[source]

Bases: kivy.uix.filechooser.FileChooserController

Implementation of a FileChooserController using a list view.

New in version 1.9.0.

class kivy.uix.filechooser.FileChooserIconView(**kwargs)[source]

Bases: kivy.uix.filechooser.FileChooserController

Implementation of a FileChooserController using an icon view.

New in version 1.9.0.

class kivy.uix.filechooser.FileChooserListLayout(**kwargs)[source]

Bases: kivy.uix.filechooser.FileChooserLayout

File chooser layout using a list view.

New in version 1.9.0.

class kivy.uix.filechooser.FileChooserIconLayout(**kwargs)[source]

Bases: kivy.uix.filechooser.FileChooserLayout

File chooser layout using an icon view.

New in version 1.9.0.

class kivy.uix.filechooser.FileChooser(**kwargs)[source]

Bases: kivy.uix.filechooser.FileChooserController

Implementation of a FileChooserController which supports switching between multiple, synced layout views.

The FileChooser can be used as follows:

BoxLayout:
    orientation: 'vertical'

    BoxLayout:
        size_hint_y: None
        height: sp(52)

        Button:
            text: 'Icon View'
            on_press: fc.view_mode = 'icon'
        Button:
            text: 'List View'
            on_press: fc.view_mode = 'list'

    FileChooser:
        id: fc
        FileChooserIconLayout
        FileChooserListLayout

New in version 1.9.0.

manager

Reference to the ScreenManager instance.

manager is an ObjectProperty.

view_list

List of views added to this FileChooser.

view_list is an AliasProperty of type list.

view_mode

Current layout view mode.

view_mode is an AliasProperty of type str.

class kivy.uix.filechooser.FileChooserController(**kwargs)[source]

Bases: kivy.uix.relativelayout.RelativeLayout

Base for implementing a FileChooser. Don’t use this class directly, but prefer using an implementation such as the FileChooser, FileChooserListView or FileChooserIconView.

Events:
on_entry_added: entry, parent

Fired when a root-level entry is added to the file list. If you return True from this event, the entry is not added to FileChooser.

on_entries_cleared

Fired when the the entries list is cleared, usually when the root is refreshed.

on_subentry_to_entry: entry, parent

Fired when a sub-entry is added to an existing entry or when entries are removed from an entry e.g. when a node is closed.

on_submit: selection, touch

Fired when a file has been selected with a double-tap.

cancel(*largs)[source]

Cancel any background action started by filechooser, such as loading a new directory.

New in version 1.2.0.

dirselect

Determines whether directories are valid selections or not.

dirselect is a BooleanProperty and defaults to False.

New in version 1.1.0.

entry_released(entry, touch)[source]

(internal) This method must be called by the template when an entry is touched by the user.

New in version 1.1.0.

entry_touched(entry, touch)[source]

(internal) This method must be called by the template when an entry is touched by the user.

file_encodings

Possible encodings for decoding a filename to unicode. In the case that the user has a non-ascii filename, undecodable without knowing it’s initial encoding, we have no other choice than to guess it.

Please note that if you encounter an issue because of a missing encoding here, we’ll be glad to add it to this list.

file_encodings is a ListProperty and defaults to [‘utf-8’, ‘latin1’, ‘cp1252’].

New in version 1.3.0.

Deprecated since version 1.8.0: This property is no longer used as the filechooser no longer decodes the file names.

file_system

The file system object used to access the file system. This should be a subclass of FileSystemAbstract.

file_system is an ObjectProperty and defaults to FileSystemLocal()

New in version 1.8.0.

files

The list of files in the directory specified by path after applying the filters.

files is a read-only ListProperty.

filter_dirs

Indicates whether filters should also apply to directories. filter_dirs is a BooleanProperty and defaults to False.

filters

filters specifies the filters to be applied to the files in the directory. filters is a ListProperty and defaults to []. This is equivalent to ‘*’ i.e. nothing is filtered.

The filters are not reset when the path changes. You need to do that yourself if desired.

There are two kinds of filters: patterns and callbacks.

  1. Patterns

    e.g. [‘*.png’]. You can use the following patterns:

    Pattern Meaning
    * matches everything
    ? matches any single character
    [seq] matches any character in seq
    [!seq] matches any character not in seq
  2. Callbacks

    You can specify a function that will be called for each file. The callback will be passed the folder and file name as the first and second parameters respectively. It should return True to indicate a match and False otherwise.

Changed in version 1.4.0: Added the option to specify the filter as a callback.

get_nice_size(fn)[source]

Pass the filepath. Returns the size in the best human readable format or ” if it is a directory (Don’t recursively calculate size).

layout

Reference to the layout widget instance.

layout is an ObjectProperty.

New in version 1.9.0.

multiselect

Determines whether the user is able to select multiple files or not.

multiselect is a BooleanProperty and defaults to False.

path

path is a StringProperty and defaults to the current working directory as a unicode string. It specifies the path on the filesystem that this controller should refer to.

Warning

If a unicode path is specified, all the files returned will be in unicode, allowing the display of unicode files and paths. If a bytes path is specified, only files and paths with ascii names will be displayed properly: non-ascii filenames will be displayed and listed with questions marks (?) instead of their unicode characters.

progress_cls

Class to use for displaying a progress indicator for filechooser loading.

progress_cls is an ObjectProperty and defaults to FileChooserProgress.

New in version 1.2.0.

Changed in version 1.8.0: If set to a string, the Factory will be used to resolve the class name.

rootpath

Root path to use instead of the system root path. If set, it will not show a “..” directory to go up to the root path. For example, if you set rootpath to /users/foo, the user will be unable to go to /users or to any other directory not starting with /users/foo.

rootpath is a StringProperty and defaults to None.

New in version 1.2.0.

Note

Similarly to path, whether rootpath is specified as bytes or a unicode string determines the type of the filenames and paths read.

selection

Contains the list of files that are currently selected.

selection is a read-only ListProperty and defaults to [].

show_hidden

Determines whether hidden files and folders should be shown.

show_hidden is a BooleanProperty and defaults to False.

sort_func

Provides a function to be called with a list of filenames as the first argument and the filesystem implementation as the second argument. It returns a list of filenames sorted for display in the view.

sort_func is an ObjectProperty and defaults to a function returning alphanumerically named folders first.

Changed in version 1.8.0: The signature needs now 2 arguments: first the list of files, second the filesystem class to use.

class kivy.uix.filechooser.FileChooserProgressBase(**kwargs)[source]

Bases: kivy.uix.floatlayout.FloatLayout

Base for implementing a progress view. This view is used when too many entries need to be created and are delayed over multiple frames.

New in version 1.2.0.

cancel(*largs)[source]

Cancel any action from the FileChooserController.

index

Current index of total entries to be loaded.

path

Current path of the FileChooser, read-only.

total

Total number of entries to load.

class kivy.uix.filechooser.FileSystemAbstract[source]

Bases: builtins.object

Class for implementing a File System view that can be used with the FileChooser.

New in version 1.8.0.

getsize(fn)[source]

Return the size in bytes of a file

is_dir(fn)[source]

Return True if the argument passed to this method is a directory

is_hidden(fn)[source]

Return True if the file is hidden

listdir(fn)[source]

Return the list of files in the directory fn

class kivy.uix.filechooser.FileSystemLocal[source]

Bases: kivy.uix.filechooser.FileSystemAbstract

Implementation of FileSystemAbstract for local files.

New in version 1.8.0.