-reverse option for ttk::progressbar in determinate mode
|User & Date:||marc_culler 2019-12-04 12:48:58|
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It would be possible to draw a reversed progress bar on newer releases of macOS (for which the HIToolbox is not used). It would be a bit of work because the colored portion has two rounded corners and two square corners. Probably it would be easiest to apply an affine transform that reflects across a vertical line before drawing. That might even work with HIToolbox if the graphics context were modified before calling the HIToolbox routine.
However, I do not think such a thing belongs in the Aqua theme. There is no reversed progress bar available in XCode and no mention of such a thing in the Human Interface Guidelines. So no "native" macOS app would ever have a reversed progress bar.
To be honest, I don't recall ever seeing a reversed progress bar on any platform. That doesn't mean that they don't exist and it doesn't mean that Tk shouldn't have one. But I am quite certain that the Aqua theme should not have one.
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