Awesome

IU

UI framework based on the Fusion/libui.cr library, with custom elements and modified bindings from hedron-crystal/hedron.

Motivation

Currently avaliable Crystal UI frameworks are either not maintained anymore or the documentation is scarce and a single error might cause a developer to lose motivation, which is why I decided to build IU on top of the LibUI framework which is a multi-platform powerful UI toolkit.

Build status

Features

Widgets

Horizontal box, Vertical box, Checkbox, Combobox, Editable combobox.
Button, Font button, Color button, Radio button.
Datetime picker, Progress bar, Slider, Spinbox.
Text entry, Multiline text entry.
Form, Grid, Group, Table, Tab, Separator.
Image, Label.
Window, Menubar.
Many more.

Platforms

Mac OSX
Linux

Code example

require "iu"

class WindowLayer < Iu::Abstractions::Layer
  def create(*args, **kwargs)
    window = create_window(
      "Hello, World", 
      {
        800,
        600
      },
      false
    )

    # Create a label and set it as the main child of the window
    window.child = create_label(
      "Everything can be sub-structured, the deeper you go the better it gets :)"
    )

    # Create a on_close handle for the current window
    window.on_close = -> (window : Iu::Ui::Window){
      self.destroy(
        *{
          window,
          args.first
        }
      )
    }

    # Render the window to the screen
    window.show
  end
end

app = Iu::Application.new
app.add_layer(WindowLayer.new)
app.start

Installation

Follow the instructions for installation laid out in andlabs/libui.
Copy the compiled files from step 1 (i.e. files in build/out) to /usr/lib for OSX and Linux users.
Go to your shard.yml file, and enter this in:

dependencies:
  iu:
    github: grkek/iu

Run shards install.

Credits

andlabs/libui, for providing the basic UI elements
Fusion/libui.cr, for originally providing the libui bindings
hedron-crystal/hedron, for providing UI elements and extended bindings

Contributors

Qwerp-Derp Hanyuan Li - original creator
grkek Giorgi Kavrelishvili - creator, maintainer