recursivegrid

RecursiveGrid is a small library, written in Crystal. Main characteristics are:

• two-dimensional grid
• grids can contain grids, recursively
• grid elements can be arbitrary classes
• allow dynamical changes
• an API that fits immediate mode GUI usage

... while abstracting away / hiding...

• grid index counting on the user side
• column and/or row spanning

In addition you can find a sample GUI wrapper (for ImGui) that also abstracts the following aspects:

• pixel counting for both elements and optionally also (sub)grid frames
• automatical resizing of elements

https://github.com/user-attachments/assets/80b9bc63-79d2-4ea2-be8b-4d9116c34e40

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     recursivegrid:
       github: wolfgang371/recursivegrid

2. Run shards install

3. Follow steps in setup.sh

4. Run source ./setup.sh

Usage

Direct library usage

Simple example, taken from specs:

require "recursivegrid"

c = RecursiveGrid::Grid(Int32)
grid = c.new([[10, c.new([[20],[30]])]])
grid.size.should eq({2, 2})
grid.get_matrix.should eq([
    [10, 20],
    [10, 30]
])

Sample ImGui based GUI demo

As in src/imguidemo.cr, see above video.

Thanks

Thanks to...

• @ocornut, https://github.com/ocornut/ for Dear ImGui
• @oprypin, https://github.com/oprypin/ for Crystal port of ImGui
• Crystal team, https://github.com/crystal-lang/, https://crystal-lang.org/

Contributing

1. Fork it (https://github.com/your-github-user/recursivegrid/fork)
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request

Contributors

• wolfgang371 - creator and maintainer