TikZ preview in Emacs

spacemacs-tikz-preview.el

;; In Spacemacs, this sets up:
;; - LaTeX previews (in \(...\) or \[...\]) with `, T x`
;; - TikZ preview (inside #+BEGIN_LaTeX ... #+END_LaTeX blocks) with C-c C-c
;;
;; All previews and exports use AMS Euler, which I like, and a suitable text
;; font to go with it.
;;
;; Other libraries (xy and so on) should also work if you add them to the
;; org-latex-packages-alist lines below.
;;
;; People who don't use Spacemacs are assumed to have enough Emacs-fu to figure
;; out how to adapt this to their own setups.
;;
;; https://emacs.stackexchange.com/questions/31211/how-to-display-latex-image-in-org-mode/
;; http://bnbeckwith.com/blog/org-mode-tikz-previews-on-windows.html
;; https://emacs.stackexchange.com/questions/16392/rendering-latex-code-inside-begin-latex-end-latex-in-org-mode-8-3-1

(defun dotspacemacs/user-config ()
  
  (require 'ob-latex)
  (with-eval-after-load 'org

    (setq org-latex-create-formula-image-program 'imagemagick)
    (setq org-latex-packages-alist
          '(("" "newpxtext,newpxmath" t)
            ("" "tikz" t)
            ("" "tikz-cd" t)
            ("" "eulervm" t)))
    (setq org-format-latex-options (plist-put org-format-latex-options :scale 1.6))

    (org-babel-do-load-languages
     'org-babel-load-languages
     '((latex . t)))

    (eval-after-load "preview"
      '(add-to-list 'preview-default-preamble "\\PreviewEnvironment{tikzpicture}" t))
    )
  )