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PODisplaying info panel at top of buffer
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  1. PODisplaying info panel at top of buffer
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    copied!<p>I'd like to display a few lines at the top of the buffer, but not as part of the actual buffer text, just for display.</p> <p>Specifically, I'd like to display a Git timeline (not yet released, sorry), like this automatically when I open a file, so I can easily see any recent activity:</p> <pre><code> P DP D D T=F=S=S=M=T=W=T=F=S=S=M=T=W=T=F=S=S=M==T==W==T==F==S==S==M==T==W==T==F==S==S==M= 11 18 25 2 9 </code></pre> <p>(Single chars are first initials of people with commits on those days. There will be a legend below as well)</p> <p>It sounds like I want something like the <a href="http://www.emacswiki.org/emacs/HeaderLine" rel="nofollow">header line</a>, but for the buffer. Is there anything like that?</p> <p>One idea I had was to use an overlay at the start of the buffer and put my text there, but I'm not at all sure this is "the right thing" or a completely inappropriate / unsuitable use of this.</p> <p>I tried, and got it working, using an overlay of the char at (point-min), with the text-property of 'before-string and the string literal above (with newlines and a trailing newline). Here's a proof of concept:</p> <pre><code>(defun test/add-overlay () (interactive) (setq test/timeline-overlay (make-overlay (point-min) (+ (point-min) 1))) (overlay-put test/timeline-overlay 'timeline-panel t) (overlay-put test/timeline-overlay 'before-string (propertize " P DP D D \nT=F=S=S=M=T=W=T=F=S=S=M=T=W=T=F=S=S=M==T==W==T==F==S==S==M==T==W==T==F==S==S==M=\n 11 18 25 2 9 " 'face 'font-lock-comment-face)) ) (defun test/remove-overlay () (interactive) (remove-overlays (point-min) (point-max) 'timeline-panel t) ) </code></pre> <p>This does seem to work quite fine, but I'm not sure if it might conflict with something else. </p> <p>Is this the way to go, or are the more suitable user interface constructs in Emacs to do what I want?</p>
 

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