front end - Prompt a set of possible options

Recent versions of Mathematica dynamically prompt a list of possible options. For example, when typing

Plot[x, {x,0,1}, PlotStyle->

After typing the arrow, Mathematica prompt a list Gray, Dashed, Thick for choice. How to define similar behavior for user defined functions? For example,

Options[myFun] = {myOpt -> value};
myFun[OptionsPattern[]] := 1;

How to prompt a set of possible options, like opt1, opt2, opt3 right after typing

myFun[myOpt->

Answer

Thanks for asking this question; I might not have discovered this customizable area without it.

The auto-completion option values are automatically loaded on Front End start from:

FileNameJoin[{$InstallationDirectory, "SystemFiles", "FrontEnd",

  "SystemResources", "FunctionalFrequency", "OptionValues"}]

This directory contains a series of Package (.m) files each with the name of a function, e.g. ArrayPlot.m. The file name itself determines that this will apply to the function ArrayPlot. It also contains an additional file that appears to apply to all functions: CommonOptions.m

The structure of each file is a list of Rules:

{Extension -> {"Automatic"}, Trig -> {"True", "False"}}

The right hand side of each rule is always a list of Strings or an empty list {}

Option values that are actual strings must be escaped: "\"string\""

Option names must be Symbols (thanks Kuba)

A special Rule form exists for icons within the menu, e.g. from ArrayPlot.m:

PlotTheme ->
 {{"\"Web\"", "PlotTheme-ArrayPlot-Web.png"},
  {"\"Minimal\"", "PlotTheme-ArrayPlot-Minimal.png"},
  {"\"Detailed\"", "PlotTheme-ArrayPlot-Detailed.png"},
  {"\"Business\"", "PlotTheme-ArrayPlot-Business.png"},
  {"\"Marketing\"", "PlotTheme-ArrayPlot-Marketing.png"},
  {"\"Scientific\"", "PlotTheme-ArrayPlot-Scientific.png"},
  {"\"Monochrome\"", "PlotTheme-ArrayPlot-Monochrome.png"},

  {"\"Classic\"", "PlotTheme-ArrayPlot-Classic.png"},
  {"\"Default\"", "PlotTheme-ArrayPlot-Default.png"}}

Each of these icon files reside in:

FileNameJoin @ {$InstallationDirectory, "SystemFiles", "FrontEnd", 
  "SystemResources", "Bitmaps", "Popups", "CodeCompletion", "Thumbnails"}

I have not checked to see if other paths are also searched.

As an example I created a new file foo.m in the OptionValues directory with the content:

{myOption -> {"Doc", "Grumpy", "Happy", "Sleepy", "Bashful", "Sneezy", "Dopey"}}

Now after (re)starting Mathematica:

enter image description here

Comments

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plotting - Mathematica: 3D plot based on combined 2D graphs

I have several sigmoidal fits to 3 different datasets, with mean fit predictions plus the 95% confidence limits (not symmetrical around the mean) and the actual data. I would now like to show these different 2D plots projected in 3D as in but then using proper perspective. In the link here they give some solutions to combine the plots using isometric perspective, but I would like to use proper 3 point perspective. Any thoughts? Also any way to show the mean points per time point for each series plus or minus the standard error on the mean would be cool too, either using points+vertical bars, or using spheres plus tubes. Below are some test data and the fit function I am using. Note that I am working on a logit(proportion) scale and that the final vertical scale is Log10(percentage). (* some test data *) data = Table[Null, {i, 4}]; data[[1]] = {{1, -5.8}, {2, -5.4}, {3, -0.8}, {4, -0.2}, {5, 4.6}, {1, -6.4}, {2, -5.6}, {3, -0.7}, {4, 0.04}, {5, 1.0}, {1, -6.8}, {2, -4.7}, {3, -1....

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