Hi,
I have an editor-canvas% subclass and want to set the default style,
but adding it with name "Standard" to the-style-list doesn't work. Do
I have to replace the style list of the canvas with a new one? Or does
the default style of an editor-canvas% have to be called differently?
"Basic"?
Without the right default style set-line-count also doesn't work as
desired. It sets the wrong size for lines with smaller fonts that are
added, so I assume this method is based on the default style. But which
style is exactly the default style "Basic" or "Standard", and how do I
change it?
best,
Erich
-----
; Example (sorry, not runnable, because it uses my own preference and
; what I call 'metastyle' impementation)
; layout-init does not really change the style, which
; is why I use set-style for every snip. But then set-line-count
; doesn't work as desired.
(define console%
(class editor-canvas%
(inherit scroll-with-bottom-base allow-scroll-to-last)
(define text #f)
(define console-style #f)
(define sema (make-semaphore 1))
(define (layout-init)
(define style (send the-style-list
find-named-style "Basic"))
(set! console-style (send the-style-list
find-or-create-style
style
(metastyle->style
(pref:console-style))))
(send the-style-list new-named-style "Standard" console-style)
(set! text
(new text%
[auto-wrap #t]
[line-spacing 0]))
(send this set-editor text)
(scroll-with-bottom-base #t)
(allow-scroll-to-last #t)
(send this set-line-count 2))
(define (synced-add-line msg)
(send text begin-edit-sequence)
(send text set-position (send text last-position))
(define snip (make-object string-snip% msg))
(send snip set-style console-style)
(send text insert #\newline)
(send text insert snip)
(send text end-edit-sequence)
(send text scroll-to-position (send text last-position))
(semaphore-post sema))
(define/public (add-line msg)
(call-with-semaphore
sema
(lambda ()
(synced-add-line msg))))
(define/public (show-message msg delay)
(if (> delay 0)
(call-once/delayed
(lambda ()
(queue-callback
(lambda ()
(send this add-line msg))))
delay)
(add-line msg)))
(super-new
[style '(auto-vscroll auto-hscroll no-border no-focus transparent)]
[wheel-step 1]
[scrolls-per-page 10]
[stretchable-height #f])
(layout-init)))
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