UnderOS Crop

This is a nice image crop plugin for the under-os project.

Usage

Add it to your Gemfile

gem `under-os`
gem `under-os-crop`

Then you can either use it as a CROP element in your HTML markup

<page title="Image crop">
  <crop id="the-crop"></crop>
</page>

Or spawn it programmatically in your UOS::Page controller

class CropPage < UOS::Page
  def initialize
    @crop = UOS::Crop.new
  end
end

Either way the UOS::Crop class is a subclass of the UOS::UI::View so all the normal under-os rules apply.

Cropping images

Once you've got an instance of the UOS::Crop class, you can give it an instance of a UIImage class as the image that needs to be cropped and then read it the same way from the same #src property

# set a new image to crop
@crop.src = UIImage.alloc.initWithImage("test.png")

# whenever the user is done, you can read it back
@crop.src # -> the cropped image

Setting Aspect Ratio

You can set an aspect ratio for the crop widget as well through the #ratio property

@crop.ratio = "3:4"
@crop.ratio = "1:1"
@crop.ratio = nil # no ratio

Tilting & Turning

You also can set the image tilt programmatically (say from a slider in UI) or turn the image 90 degrees with the #turn and #tilt methods

@crop.turn Math::PI / 4  # turn 90 degrees
@crop.tilt Math::PI / 12 # tilt image by 30 degrees

Copyright & License

All the code in this repository is released under the terms of the MIT license

Copyright (C) 2014 Nikolay Nemshilov