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Nevu UI means: Nevu is Eleven times better Versus other UI's User Interface

Brief Description

Nevu UI is a library for simply creating GUIs in Python. Nevu UI aims to provide a set of ready-made, easily customizable components for creating interfaces in games and applications.

Key features:

  • Layouts: Various container options that automatically position elements inside themselves, for example Grid, ScrollableColumn, etc.
  • Widgets: Ready-to-use elements such as buttons, input fields, and labels.
  • Customization: Support for appearance customization via Style, lots of customization options inside Style.
  • Animations: Built-in support for animations via AnimationManager.
  • Declarativeness: Support for declarative interface creation.

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Style - storage of parameters for appearance customization

  • gradient
    • Gradient is supported in all backends, and there are 2 types of gradient: linear and radial.
  • color_theme
    • Analogous to MaterialDesign, responsible for the visual component of the widget and menu. You can choose from 10+ ready-made themes or create your own theme.
  • font_name/font_size
    • Controls the font size on widgets that contain it.
  • border_width/bw
    • Allows changing the border size.
  • border_radius/br
    • Allows changing the border corner radius.

and so on...


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Declarativeness and its examples in Nevu UI

  • Declarative approach: Describe your interface declaratively. 
    # Specify content directly when creating the layout
my_grid = Grid(..., content={(1,1): Button(...)})
  • Adaptive size system - SizeRules: Allows using relative values to specify the initial height/width of an object instead of pixels. Example of using SizeRule: 
    Widget(size = (30*vw, 50*fill))
    or you can use % 
    Widget(size = (30%vw, 50%fill))
    • vh / vw: Percentage of the window's height/width.
    • fillx / filly / fill: Percentage of the parent layout's height/width/size.
    • gc / gcw / gch: Percentage of the grid cell size.
    • Prefix c: can be placed in any SizeRule, it means that the current value will be taken; without the prefix, the original value will be taken.

Built-in animations:

  • 25+ built-in animations
  • Nevu UI has Two types of animations:
    • Start.
    • Continuous.
  • Usage example:
    • Start: widget.animation_manager.add_start_animation(...)
    • Continuous: widget.animation_manager.add_continuous_animation(...)

Parameter system - ParamEngine:

  • ParamEngine is a tool built into all layouts and widgets, it allows you to:
    • Add variables to the object's __init__.
    • Check parameter type during initialization and after.
    • Integrate a parameter into different stages of initialization.
    • Set custom setter and getter.
  • Examples: 
    import nevu_ui as ui
from typing import Unpack, NotRequired

# Create a TypedDict with variables (optional, but looks nice)
class MyWidgetKwargs(ui.WidgetKwargs):
    my_var: NotRequired[int | float]

class MyWidget(ui.Widget):
    def __init__(self, size: NvVector2 | list, style: Style = default_style, **param_kwargs: Unpack[MyWidgetKwargs]):
        super().__init__(size, style, **param_kwargs)

    # Override the function to add parameters (mandatory)
    def _add_params(self):
        super()._add_params()

        # Add a parameter (mandatory)
        self._add_param('my_var', int | float)

        # You can also add a link to a parameter
        # self._add_param_link('my_var', 'my_var_new_name')

        # You can also block a parameter if necessary
        # self._block_param('my_var')

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Dependencies:

Python >= 3.12.*

  • For Building:
    • setuptools >= 61.0
    • Cython
    • numpy
  • For Running:
    • numpy
  • Additional libraries:
    • pygame-ce>=2.3.0
    • raylib
    • pyyaml

Installation via pip

pip install nevu-ui[all]

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Example1

Example2

Example3

Basic Grid

Declarative Approach

import nevu_ui as ui # Import Nevu UI
import pygame

pygame.init()

class MyGame(ui.Manager): # Create the base of our application
    def __init__(self):
        super().__init__(ui.Window((400, 300), title = "My Game")) # Initialize the manager
        style = ui.Style(borderradius=20, colortheme=ui.ColorThemeLibrary.material3_dark) # Create Style (optional)
        self.menu = ui.Menu(self.window, [100%ui.vw, 100%ui.vh], style = style, # Create a menu
                            layout= ui.Grid([100%ui.vw, 100%ui.vh], row=3, column=3, # Create a grid layout
                                            content = {
                                                (2, 2): ui.Button(lambda: print("You clicked!"), "BUTTON!", [50%ui.fill, 50%ui.gc], style=style) # Create a button
                                            }
                                            )
                            )
    def on_draw(self):
        self.menu.draw() # Draw the menu
    def on_update(self, events):
        self.menu.update() # Update the menu

game = MyGame()
game.run() # Run the finished application

Imperative Approach

import nevu_ui as ui # Import Nevu UI
import pygame

pygame.init()

window = ui.Window((400, 300), title = "My Game") # Create a window

style = ui.Style(borderradius=20, colortheme=ui.ColorThemeLibrary.material3_dark) # Create Style
menu = ui.Menu(window, [100%ui.vw, 100%ui.vh], style=style) # Create a menu
layout = ui.Grid([100%ui.vw, 100%ui.vh], row=3, column=3) # Create a grid layout
layout.add_item(ui.Button(lambda: print("You clicked!"), "BUTTON!", [50%ui.fill, 50%ui.gc], style=style), x = 2, y = 2) # Create a button

menu.layout = layout # Set the menu layout

while True: # Main loop
    events = pygame.event.get() # Get events
    window.update(events) # Update the window
    menu.update() # Update the menu
    menu.draw() # Draw the menu
    pygame.display.update() # Update the screen

Example Result

Example1


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Current status of Nevu UI.

Layouts (Inheritors of Layout_Type)

(✅ — done, ❌ — not done, 💾 — deprecated/not working)

  • ✅ Grid
  • ✅ Row
  • ✅ Column
  • ✅ ScrollableRow
  • ✅ ScrollableColumn
  • ✅ ColorPicker
  • 💾 Pages
  • 💾 Gallery_Pages
  • ✅ StackColumn
  • ✅ StackRow
  • ✅ CheckBoxGroup
  • ✅ Panel

Widgets (Inheritors of Widget)

  • ✅ Widget
  • ✅ Button
  • ✅ Label
  • ✅ Input
  • ✅ EmptyWidget
  • ✅ Tooltip
  • 💾 Gif
  • ❌ MusicPlayer (Will be reworked, hopefully)
  • ✅ ProgressBar
  • ✅ SliderBar
  • ✅ ElementSwitcher
  • 💾 FileDialog
  • ✅ RectCheckBox
  • ✅ Switch

Available Backends

  • ✅ Pygame-ce
  • ✅ Sdl(Pygame-ce._sdl2)
  • ✅ RayLib

Backend Exclusives

  • Ripple effect — Raylib exclusive
  • Customizable center and angle of the gradient — Raylib exclusive
  • Tooltip — Pygame exclusive

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Nevu UI is protected by the MIT license


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Nevu UI is NOT a stable framework, you may encounter many bugs in it.

If you find a bug, please report it in the Issues section


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Gmail: bebrovgolem@gmail.com

Creator: Nikita A.

Project links

Data verified by PyPI on Sep 10, 2026
Data provided by the project maintainers, verified at the time the release was uploaded to PyPI.

Key dates

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  • Released:
Newer release available (0.8.5.post3)

1 maintainer

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Avatar for Golem_Bebrov from gravatar.com Golem_Bebrov

Credits

Author: GolemNikidastrov

GitHub Statistics

Data verified by PyPI on Sep 10, 2026
The GitHub source repository was provided by the project maintainers and verified by PyPI at the time of upload. Stars, forks, and open issues/PRs are derived from that repository and have not been independently verified.

License

MIT License

Requires

Python >=3.12

Provides Extra

raylib pygame config all

Tags

gui ui gamedev performance cython raylib pygame pygame-ce declarative-ui user-interface 2d-graphics game-ui ui-framework declarative-programming pyray python-ui

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