https://github.com/firejox/CrSignals

A signals/slots library in Crystal
https://github.com/firejox/CrSignals

Last synced: 9 days ago
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A signals/slots library in Crystal

• Host: GitHub
• URL: https://github.com/firejox/CrSignals
• Owner: firejox
• License: mit
• Created: 2019-11-29T14:01:54.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2019-12-27T14:56:23.000Z (almost 5 years ago)
• Last Synced: 2024-08-01T17:36:03.060Z (3 months ago)
• Language: Crystal
• Homepage:
• Size: 16.6 KB
• Stars: 10
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-crystal - CrSignals - Signals/slots notification library (Misc)
• awesome-crystal - CrSignals - Signals/slots notification library (Misc)

README

        
# CrSignals [![Build Status](https://github.com/firejox/CrSignals/workflows/Crystal%20CI/badge.svg?branch=master)](https://github.com/firejox/CrSignals/actions) [![Release](https://img.shields.io/github/v/release/firejox/CrSignals)](https://github.com/firejox/CrSignals/releases)

CrSignals is a signals/slots library. You can define your signal/slot function, wire them and emit data.

## Installation

1. Add the dependency to your `shard.yml`:

   ```yaml

   dependencies:

     CrSignals:

       github: firejox/CrSignals

   ```

2. Run `shards install`

## Usage

* Here is a basic example of CrSignals library.

```crystal

require "CrSignals"

class Foo

  include CrSignals::Generator

  

  property x : Int32 = 0

  cr_signal value_change(Int32)

  def set_x(v : Int32)

    if @x != v

      @x = v

      value_change(v)

    end

  end

end

a = Foo.new

b = Foo.new

a.connect_value_change(->b.set_x(Int32))

a.set_x(3)

puts b.x # => 3

a.disconnect_value_change(->b.set_x(Int32))

a.set_x(4)

puts b.x # => 3

```

* If you operate with incorrect type, it will report a compile error.

```crystal

require "CrSignals"

class Foo

  include CrSignals::Generator

  property x : Int32 = 0

  cr_signal value_change(Int32)

  def set_x(v : Float64); end

end

a = Foo.new

b = Foo.new

a.connect_value_change(->b.set_x(Float64)) # compile error

```

## Contributing

1. Fork it ()

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

- [Firejox](https://github.com/firejox) - creator and maintainer