Improved Papercrop

Added Features:

1. Ability to set minimum and maximum crop size by defining min_size and max_size respectively in your model. e.g

    class User < ActiveRecord::Base
   
    has_attached_file :avatar, styles:{standard: "300x300",thumbnail:"100x100"}
    crop_attached_file :avatar , min_size:'300x300'
   

   Generally, you'll be setting min_size to your largest paperclip preset. In our example it is 300x300. You may want set max_size in similar way.

2. The initial crop selection size is set to the maximum width possible, a behaviour seen on Facebook.com.The implication of this subtle change is a noticeable improvement in user experience.

3. Now you do not have to set attr_accessible for papercrop parameters in your model. Previously, I had to add:

     attr_accessible :avatar_original_w, :avatar_original_h, :avatar_box_w, :avatar_crop_x,
     :avatar_crop_y, :avatar_crop_w, :avatar_crop_h, :avatar_aspect
   

   provided that the attachment name is avatar.

4. If using Rails 4 , cropping_params(:avatar) outputs a list of parameters being used by papercrop, where :avatar is the name of attachment as defined in your model. You can use this helper in two ways:

    @user.update_attributes(params.require(:user).permit( cropping_params(:avatar) )
   

   or

    def user_params
      params.require(:user).permit(:email,:password,:password_confirmation,cropping_params(:avatar))
    end
   

   The difference is that the former only allows cropping paramters through, which is useful if you are using a seperate cropping page. The later is useful if the cropping form is somehow integrated with another form.

5. Includes minified resources. Saves an additional ~30kB.

For full documentation, visit the original repository.

Installation

Include this in your gemfile

gem "papercrop", git: "https://github.com/ezuhaib/papercrop"