I have seen some videos on YuoTube where people are doing some cool things with Emacs, e.g. compiling a LaTeX file and viewing it as a pdf from within Emacs. I have also seen a graphviz DOT file compiled and it's PNG viewed within Emacs. Can similar things be done with gvim?
Does it really matter whether the preview is inside Vim or external to it?
Here's what I do. In my .vimrc, I have:
This causes (g)vim to save the file whenever the cursor moves. In effect, the file is always saved this way.
On the left side of my screen I put the gvim window. On the right side, I put a PDF viewer which auto-reloads whenever the PDF changes. (You can use any of several for linux: evince, okular, zathura, xpdf, etc.) The upshot is that the PDF previewer updates as I type. It's not nearly as fast as, say, gummi's live preview, but it's pretty close. It's certainly better than the emacs video you linked to, since unlike that, I don't even have to do anything to compile; gvim's constant saving of the file coupled with latexmk means the file is always compiling as I type, and hence, the PDF preview is always updating.
No. Within gvim you can compile a file and display the results with an external viewer in its own window, but not within a gvim window.