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Nim's Windows GUI Framework
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wNim is Nim's Windows GUI Framework, based on winim. Layout DSL is powered by Yuriy Glukhov's Kiwi constraint solving library.


This is a fork of wNim that adds support for some 3rd party dll controls.


Code Examples

Basic code structure:

import wNim

let app = App()
let frame = Frame(title="Hello World", size=(400, 300))

Event handler:

button.wEvent_Button do ():

frame.wIdExit do ():

frame.wEvent_Size do ():

Layout DSL:

    top = + 10
    left = panel.left + 10
    right + 10 = panel.right
    bottom + 10 = panel.bottom


panel.autolayout """

Getter and Setter:

let frame = Frame()

# wxWidgets/wxPython style
frame.setLabel("Hello World")
echo frame.getLabel()

# nim style
frame.label = "Hello World"
echo frame.label




With git on windows:

nimble install wNim

Without git:

1. Download and unzip this moudle (by click "Clone or download" button).
2. Start a console, change current dir to the folder which include "wNim.nimble" file.
   (for example: C:\wNim-master\wNim-master>)
3. Run "nimble install"


To compile the examples, try following command:

nim c -d:release --opt:size --passL:-s --app:gui demo.nim

For Windows XP compatibility, add:


To compile by Tiny C Compiler, or want to add some resource files, take a look at

Q & A

Q: Why I start this project?

In the first, I just wanted to write some code to test and prove my winim library. I wrote some event handler, some GUI control class, more and more...Finally, it become a whole GUI framework now.

Q: Why the class and api name look so like wxWidgets?

English is not my mother tongue, I often have no idea how to name an object or a function. So I borrow wxWidgets' names to develop my own framework.

Q: Why not add linux or macOS support?

I start from winim. It is just a Windows API module.

Q: How is wNim compare to nimx, libui, NiGui etc?

They are all good GUI librarys. I think wNim is easier to use and produce smaller exe file. However, it only support Windows system.



Read license.txt for more details.

Copyright (c) 2017-2019 Kai-Hung Chen, Ward. All rights reserved.

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