get real buttons in forms that is stylable

simple_form_form_builder.rb

# now you can use 
#   form.button :submit 
# to get a real button that is stylable

class SimpleForm::FormBuilder
  def submit_button(title=nil, options={}, &block)
    title, options = nil, title if title.is_a?(Hash)
    title ||= submit_default_value
    options[:type] = 'submit'
    template.add_class_to_html_options(options, 'submit')
    template.content_tag(:button, title, options)
  end

  def preview_button(options={}, &block)
    title = I18n.t('helpers.preview')
    options[:type] = 'submit'
    options[:name] = 'preview'
    template.add_class_to_html_options(options, 'preview')
    template.content_tag(:button, title, options)
  end

  def cancel_button(options={})
    title = I18n.t('helpers.cancel')
    target = options.delete(:url) || object
    template.add_class_to_html_options(options, 'button')
    template.add_class_to_html_options(options, 'warning')
    template.add_class_to_html_options(options, 'cancel')
    template.link_to(title, target, options)
  end
end