Hello, I have to do a simple spreadsheet editor and I wonder whether Racket suits my needs. The main challenge is that the spreadsheet editor should be able to edit tables as big as 1000x1000 or 10000x100 cells.
Here is a stub that I have done, using williams/table-panel package from PLaneT: http://pastebin.com/aAjg2TZT It initializes pretty slow and does the scrolling pretty slow even with 20x10 cells, and 100x100 is already almost impossible to work with, let alone 1000x1000 or 10000x100. OK, I thought, maybe I should use the single canvas (not separate controls) for the cells, and leave only buttons as controls for rows and columns. But having just 1000 buttons with a scrollbar turned out to be slow enough: #lang racket (require racket/gui/base) (define frame (instantiate frame% ("Test"))) (define scrolling-panel (new vertical-panel% (parent frame) (style '(auto-vscroll)))) (for ((i (in-range 1000))) (new button% (parent scrolling-panel) (horiz-margin 0) (vert-margin 0) (label (number->string (+ 1 i))))) (send frame resize 100 400) (send frame show #t) It takes considerable time to initialize, and the scrolling is pretty much of a slide-show kind. Raising the number to 10000 makes it a complete no-go. So I am wondering whether there are hacks to speed up the GUI that I am creating. Best regards, Dmitry ____________________ Racket Users list: http://lists.racket-lang.org/users
