41 lines
1.4 KiB
Plaintext
41 lines
1.4 KiB
Plaintext
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;;;;
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;;;; STk adaptation of the Tk widget demo.
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;;;;
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;;;; This demonstration script displays two image widgets.
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;;;;
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(require "Tk-classes")
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(define image-directory *STk-images*)
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(define (demo-image2)
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(let* ((w (make-demo-toplevel "image2"
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"Image Demonstration #2"
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"This demonstration allows you to view images using an Tk \"photo\" image. First type a directory name in the listbox, then type Return to load the directory into the listbox. Then double-click on a file name in the listbox to see that image."))
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(dir (make <Entry> :parent w :width 30 :text-variable 'image-directory))
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(lst (make <Scroll-listbox> :parent w
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:value '("earth.gif" "earthris.gif" "mickey.gif" "teapot.ppm")))
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(img (make <Photo-Image>))
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(lab (make <Label> :parent w :image img)))
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(pack (make <Label> :parent w :text "Directory:")
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dir
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(make <Label> :parent w :text "File:")
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lst
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(make <Label> :parent w :text "Image:")
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lab
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:side "top" :anchor "w")
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;; Add binding to listbox and entry
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(let ((lb (slot-ref lst 'listbox)))
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(bind lb "<Double-1>"
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(lambda ()
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(let ((file (selection 'get)))
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(slot-set! img 'file (string-append image-directory "/" file)))))
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(bind dir "<Return>"
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(lambda ()
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(slot-set! lb 'value
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(sort (map basename
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(glob (string-append image-directory "/*")))
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string<?)))))))
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