add 'upward style for slider controls #315
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It looks like GTK is the only backend which tells the native control about the direction. Do Cocoa/Win32 have any corresponding functions? NSSlider, for example, seems to "fill up" from the bottom (but not if there are ticks?), so a On win32, I see something called (BTW, is there an easy way to build and test a package like racket/gui which has lots of dependencies and dependents in the stdlib? I've looked around a little and haven't found anything yet.) |
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I couldn't find a way to get downward sliders to render right on Mac OS when the range is >= 64, so I added a note to the documentation that rendering could be misleading. @kengruven — Thanks for the pointer to For info on trying out changes to a package like |
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Resyntax analyzed 4 files in this pull request and found no issues.
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Resyntax analyzed 4 files in this pull request and found no issues.
Relevant to #314.
As far as I can tell, a vertical slider in
racket/guiis top-to-bottom on all platforms. I don't know or remember why, but I agree that a bottom-to-top slider seems more useful, and probably non-racket/guiprograms use bottom-to-top sliders everywhere. The top-to-bottom rendering is also inherent in the macOS control, at least when the range is >= 64.To add bottom-to-top support without breaking any old programs — just in case — this commit adds an
'upwardstyle option alongside'horizontaland'vertical.