Qfyilyi

The FE stores a bunch of little nine-patch images in the layout that govern the appearance of much of Mathematica. These things are incredibly useful to have as they may be used to give a clean appearance to custom Panel and Button objects and things.

How can I get these?

Here's a little function that gets the FrontEnd`FileName stuff:

bmpPath =

  ToFileName /@

   DeleteCases[

    CurrentValue[$FrontEndSession, {PrivatePaths, "Bitmaps"}],

    ParentList

    ];(* use this if you want to look at _all_ of the bitmaps *)



bmpPath = 

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

    "SystemResources", "Bitmaps"};



feBMPs =

  AssociationMap[

   With[{key = #[[1]], groups = #[[2]]},

     key ->

      AssociationMap[

       #[[1]] ->

         With[{p = #[[1]]}, Association@



           Map[StringSplit[FileNameTake[#], "."][[1]] -> 

              FrontEnd`FileName[

               Evaluate@If[key === "Bitmaps", {p}, {key, p}], 

               Evaluate@FileNameTake[#]] &, #[[2]]]

          ] &,

       groups

       ]

     ] &,

   Map[

    GroupBy[#, FileNameTake[#, {-2}] &] &,

    GroupBy[

     FileNames["*.9.png", bmpPath, 

      5],

     FileNameTake[#, {-3}] &

     ]

    ]

   ];

Then we can analyze some of this stuff:

feBMPs // Keys



{"Dialogs", "Choosers", "Popups", "Ribbons", "Bitmaps", "Toolbars", "Typeset"}



Keys /@ feBMPs



<|"Dialogs" -> {"CloudLogin", "Activation", "CloudDialogs", 

   "DeployCDF", "WelcomeScreen"}, "Choosers" -> {"Color"}, 

 "Popups" -> {"CodeCompletion"}, "Ribbons" -> {"Common", "Image"}, 

 "Bitmaps" -> {"Toolbars"}, "Toolbars" -> {"Player"}, 

 "Typeset" -> {"Audio", "FormObject", "InputField", "PrintTemporary", 

   "ProgressIndicator", "Quantity", "SummaryBox", "TableView"}|>

And we can look at some elements in the thing explicitly. Here are all the bitmaps used in the little autocompletion popup:

Map[

  RawBoxes@DynamicBox[FEPrivate`ImportImage[#]] &,

  feBMPs["Popups", "CodeCompletion"]

  ] // Dataset