User interface “打开文件”对话框中未显示文件夹图标
我试图用这些代码从对话框中打开文件User interface “打开文件”对话框中未显示文件夹图标,user-interface,dialog,scheme,lisp,racket,User Interface,Dialog,Scheme,Lisp,Racket,我试图用这些代码从对话框中打开文件 #lang racket/gui (require racket/gui/base framework mrlib/path-dialog) (define top-frame (new frame% [label "The Frame"] [min-width 200] [min-height 100]
#lang racket/gui
(require racket/gui/base
framework
mrlib/path-dialog)
(define top-frame (new frame%
[label "The Frame"]
[min-width 200]
[min-height 100]
[alignment (list 'center 'center)]))
(send top-frame show #t)
(define open (new path-dialog%
[existing? #t]
[filters (list (list "My Documents" "*.docx")
(list "Text Files" "*.txt"))]))
(define open-button
(new button%
[label "Open File"]
[parent top-frame]
[callback (lambda (b e)
(define input-port-or-not (send open run))
(when input-port-or-not
(message-box "open dialog" (format "Dialog box is open.") #f '(ok no-icon))))]))
我得到了这个没有文件夹图标的打开文件对话框
如何更改以使对话框的外观如下图所示,其中显示文件夹图标
如果您只想使用
mrlib/path对话框,我认为这是不可能的
但是,下面是它的代码:。通过修改此文件,您可能可以获得所需的内容
(如果您使用Linux,可以在/usr/share/racket/pkgs/gui-lib/mred/private/path-dialog.rkt
中找到该文件)