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`QPalette::Foreground` is deprecated and was replaced by `QPalette::WindowText` since at least Qt 4.8. https://doc.qt.io/archives/qt-4.8/qpalette.html#ColorRole-enum This replaces the `QPalette::Foreground` color role with `QPalette::WindowText` in `QtDialog/RegexExplorer.cxx` to avoid compiler warnings.
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