[MacPorts] #57574: Several Qt apps do not display correctly in 'dark mode' (Mojave)

[MacPorts]

#57574: Several Qt apps do not display correctly in 'dark mode' (Mojave)
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 Reporter:  szhorvat  |      Owner:  (none)
     Type:  defect    |     Status:  new
 Priority:  Normal    |  Milestone:
Component:  ports     |    Version:
 Keywords:  mojave    |       Port:  qt5-qtcreator, owncloud-client
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 Several Qt apps do not display correctly with Mojave's dark mode.

 One example is Qt Creator's Preferences dialog. I attached a screenshot.
 Another example is ownCloud.

 Typically, white text is displayed on white background, making it
 unreadable (and the program unusable).

 The reason why I consider this a MacPorts issue is that the official
 builds of these programs (e.g. the Qt Creator build that one can download
 from http://qt.io/) simply do not switch to dark mode, and therefore do
 not suffer from this problem.

 It would be useful if the MacPorts builds also disabled dark mode, if this
 is easy to do.

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Ticket URL: <https://trac.macports.org/ticket/57574>
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