flet

Desktop Flet app can be started with a hidden window

New view=flet.FLET_APP_HIDDEN argument - run app with a hidden window on the startup. Window could be made visible from a user code:

import flet
from flet import Container, IconButton, Page, Row, Text, WindowDragArea, icons

def main(page: Page):
    page.add(
        Row(
            [
                WindowDragArea(
                    Container(
                        Text("This is a window move drag area."),
                        bgcolor="yellow",
                        padding=10,
                    ),
                    expand=1,
                ),
                IconButton(icon=icons.CLOSE, on_click=lambda _: page.window_close()),
            ]
        )
    )

    page.window_width = 600
    page.window_height = 400
    page.window_title_bar_hidden = True
    page.window_frameless = True
    page.window_visible = True
    page.window_center()

flet.app(target=main, view=flet.FLET_APP_HIDDEN)

New page properties to control window appearance and behavior

• page.window_close()
• page.window_title_bar_hidden
• page.window_title_bar_buttons_hidden (macOS only)
• page.window_skip_task_bar
• page.window_frameless
• page.window_progress_bar
• page.window_visible

New WindowDragArea class to enable dragging/maximizing/restoring window without a title bar.

Other changes

New Stack properties:

• Stack.clip_behavior - none, antiAlias, antiAliasWithSaveLayer, hardEdge.

Hot reload

For hot-reload run your Python program with flet command line:

usage: flet [-h] [--port PORT] [--directory] [--recursive] [--hidden] [--web] script

Runs Flet app in Python with hot reload.

positional arguments:
  script                path to a Python script

optional arguments:
  -h, --help            show this help message and exit
  --port PORT, -p PORT  custom TCP port to run Flet app on
  --directory, -d       watch script directory
  --recursive, -r       watch script directory and all sub-directories recursively       
  --hidden, -n          application window is hidden on startup
  --web, -w             open app in a web browser

By default, flet watches script file one. Use --directory flag to watch all files in script's directory. Use --recursive flag to watch script directory and all sub-directories recursively.

For example:

flet main.py -d

Platform details

New page properties:

• web - True if the app running in the browser.
• platform - operating system where the app is running: windows, macos, linux, ios and android.

Customisable route transitions

theme = Theme()
theme.page_transitions.android = "openUpwards"
theme.page_transitions.ios = "cupertino"
theme.page_transitions.macos = "fadeUpwards"
theme.page_transitions.linux = "zoom"
theme.page_transitions.windows = "zoom"
page.theme = theme

Possible values: fadeUpwards, openUpwards, zoom, cupertino.

Changelog

• e8430b2 RouteChangeEvent, ViewPopEvent

Changelog

• 454be8f Fix container click event data object (#198)
• 6e77f58 Fix #196 bgcolor has no effect if FAB has a custom content
• 72c05bc Fix client download on windows
• 6345546 Bump Flet version to 0.1.50

Changelog

• 5aeebdf Linux ARM64 support for Flet runner app (#189)
• 47935c1 Bugfix: Image control attribute src_base64 accepts str now (#187)
• 2a0a08c ContainerTapEventData
• 75ca6c2 Accessibility fixes (#179)
• 90e880c Fix button style updates

Changelog

• 73fc309 Fix #173 - ValueError: mutable default
• a41c564 Bump Flet 0.1.48 [skip ci]

Changelog

• c7f337b Fix container blend mode

Changelog

• 964924d Remove SnackBar.elevation
• 905b4ff Implicit animations and AnimatedSwitcher control (#162)
• f4967b7 Markdown and ShaderMask controls (#160)
• b38b345 Add slugify to utils (#154)
• 9fa4839 Bump Fletd [skip ci]

Blog announcement: https://flet.dev/blog/gradients-button-textfield-style

What's new

• New Container properties:
  • gradient
  • on_long_press
• New ElevatedButton, OutlinedButton, TextButton properties:
  • style
  • on_long_press
• New IconButton properties:
  • selected
  • selected_icon
  • selected_icon_color
  • style
• New ListTile properties:
  • on_long_press
• New Theme properties:
  • visual_density: standard (default), compact, comfortable, adaptivePlatformDensity.
• hidden value for Column, Page, View, Row and View controls - to enable scrolling but hide a scrollbar.
• New TextField and Dropdown properties:
  • text_size
  • color
  • bgcolor
  • border_radius
  • border_width
  • border_color
  • focused_color
  • focused_bgcolor
  • focused_border_width
  • focused_border_color
• New TextField properties:
  • max_length
  • capitalization - none (default), characters, words, sentences.
  • cursor_color
  • selection_color

Bug fixes

• Fixed https://github.com/flet-dev/flet/issues/138 page.width and page.height are 0 on the first page load
• Fixed https://github.com/flet-dev/flet/issues/77 Allow partial theme updates
• Fixed https://github.com/flet-dev/flet/issues/140 Container on_click callback breaks containers without explicit size
• Fixed https://github.com/flet-dev/flet/issues/30 Assertion "lookup_hash_table" fails on ToDo App example

Other changes

• Flutter SDK switched to beta channel.
• Fixed https://github.com/flet-dev/flet/issues/98 Changing app host/IP binding

Changelog

• 133d75f Switching between "hash" and "path" routing URL strategy (#110)
• f39312b Update readme

Changelog

• 36eea30 Navigation and Routing (#95)

Changelog

• 705bf0f Fix draggable.content_when_dragging

Changelog

• e21c6bf Drag and Drop (#62)
• c7333dc Any control can be positioned absolutely inside Stack (#60)
• b3763a6 Clickable Container (#59)
• ce4d44f Added page.pwa property to detect if an app is running as PWA (#58)

Changelog

• 34d85ba Fix UserControl _build() call (#52)

Changelog

• 2f53942 Window Manager fix for Linux (#44)

Changelog

• 0e617fe Controlling application window (#39)

Changelog

• f743acb Page events allow multiple subscribers (#38)
• c30be7a page.rtl to control text directionality (#37)

Changelog

• 5abe464 Fix web_renderer arg
• ac39008 Default webrenderer is canvaskit

Changelog

• c3b2f38 support "assets" dir for "onefile" PyInstaller
• 846bd79 Try packaging bin as data
• b7b9fb1 PyInstaller integration (#34)

Changelog

• 3eed963 Update control itself when isolated (#31)

Changelog

• 90ddef6 Linux runner (#29)