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Update QPalette() documentation to not mention the application palette

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It's an implementation detail that the default constructed palette
happens to use the d-pointer of the application palette, and as a
result has the same colors as the application palette if requested.

The palette has an empty resolve mask, and hence all the colors in
the palette are undefined. Users should not rely on QPalette() to
represent the application palette when for example overriding a
parent palette.

Task-number: QTBUG-85226
Change-Id: Ia6747887eef6e9a5f21b2002066608c433260de2
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 74559dccc84ed0f0f7d8f57165fe387c3e112485)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
This commit is contained in:
Tor Arne Vestbø 2020-12-17 20:48:31 +01:00 committed by Qt Cherry-pick Bot
parent 80bcba5661
commit 908bfa7782
1 changed files with 4 additions and 1 deletions
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5
src/gui/kernel/qpalette.cpp
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@ -530,7 +530,10 @@ static void qt_palette_from_color(QPalette &pal, const QColor &button)
*/
/*!
Constructs a palette object that uses the application's default palette.
Constructs an empty palette object with no color roles set.
When used as the palette of a QWidget the colors are resolved
as described by QWidget::setPalette().
\sa QApplication::setPalette(), QApplication::palette()
*/