![]() update ()Įnter fullscreen mode Exit fullscreen mode view def top_nav_change ( self, e ): self. all ( 0 ), width = 250, bgcolor = colors. center_right, width = 220 ), ], tight = True ), padding = padding. all ( 30 ), height = 1, alignment = alignment. top_nav_rail, # dividerĬontainer ( bgcolor = colors. view = Container ( content = Column (), # dividerĬontainer ( bgcolor = colors. BLUE_GREY, extended = True, expand = True ) def build ( self ): self. ![]() top_nav_rail = NavigationRail ( selected_index = None, label_type = "all", on_change = self. update ()įrom flet import ( UserControl, Column, Container, Row, Text, NavigationRail, NavigationRailDestination, alignment, border_radius, colors, icons, padding, margin, ) class Sidebar ( UserControl ): def _init_ ( self, app_layout, page ): super (). update () def toggle_nav_rail ( self, e ): self. setter def active_view ( self, view ): self. controls = property def active_view ( self ): return self. _active_view : Control = Column ( controls =, alignment = "center", horizontal_alignment = "center" ) self. BLUE_GREY_400, selected = False, selected_icon = icons. ![]() toggle_nav_rail_button = IconButton ( icon = icons. Here, in the main.py module we'll add this code and then continue to define the TrelloApp class.įrom flet import ( Control, Column, Container, IconButton, Page, Row, Text, IconButton, colors, icons, ) from sidebar import Sidebar class AppLayout ( Row ): def _init_ ( self, app, page : Page, * args, ** kwargs ): super (). With the proximate goal of creating the MVP of our clone, let's start by defining the main entities ( boards, board_lists, items), settle on an acceptable design and layout, and implement a sort of pseudo-repository pattern so that in future development we can move from in-memory data storage to persistent storage of some kind. For the purposes of this tutorial I'll assume the reader is familiar with the basic concept and setup of a Flet project (read the tutorials and the docs if not), and instead focus more on aspects that are not part of the existing tutorials. Having intimated that Flet is designed with simple GUIs in mind, lets nonetheless try to make something a tad more complicated than, for example, a simple dashboard with some filters, and shoot for something like a minimal version of Trello - and bestow upon it the totally-independently-arrived-at-name, Trolli. Diverging from the currently ubiquitous declarative approach and opting instead for an imperative model. This is exactly what the Flet platform aims to provide.įlet takes a different approach to many new UI frameworks that is arguably more intuitive to the majority of experienced programmers. a language with which we are already proficient (currently the only released library is in Python but C#, Typescript, and Golang libraries are on the roadmap). What we would really like is to be able to throw a UI on our logic that looks generically decent, has acceptable performance, and ideally, takes less time to write than did the business logic, and preferably in the same language in which the rest of the logic was written - i.e. ![]() In situations like these it can often feel awkward to reach for an oversized tool such as electron, a feature rich framework like flutter (irony acknowledged!), or try to quickly get a handle on some other cross platform framework like. Most developers are undoubtedly familiar with the situation of either having developed a console app that turns out to have a wider audience than originally intended, or needing to develop an internal tool for non-developers but which is destined to have a small user base and/or a relatively brief shelf life. Be sure to run pip install -r requirements.txt after cloning. ![]() The code for this tutorial can be found here with self explanatory commits. Lets make a clone of Trello in Python with the Flet framework and then deploy it to fly.io! ![]()
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