Limited screen space (160x144 is already hard to have readable text for a decent number of entries), limited memory, limited CPU. It might be trivial on a PC or modern tablet or something but given this has to run on a GB screaming along at 4MHz with nice 8 bit z80 instructions with maybe a 8 kilobytes of RAM (maybe a bit more if you are good), be accessed from the cart itself (though something might be able to be generated there).
bgb.bircd.org/pandocs.htm#gameboytechnicaldata if you want tech specs for the GB.
By way of example I have a bit more than 1000 files in my downloads folder. Did a ls - s -h in there to generate a text list of just sizes and file names (random sample in the code box below)
33.6KiB for that one, which is more than even the fanciest MBC in common use.
Code:
2.5M 100_0049.JPG
2.5M 100_0051.JPG
2.4M 100_0052.JPG
1.6M 100_0105.JPG
2.9M 102_0091.JPG
1.8M 102_0093.JPG
4.0K 1064 - Eggo Mania (EU).cht
At this point you would almost be better off running a program to generate it on a PC or something, and that rather takes away from the drag and drop thing. Real time reading might be somewhat doable but that would be another burden on things and I would rather have fast scrolling/page up-page down.
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Xdqwerty:
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Sicklyboy:
