On macOS, we see unexplained white flashes of the UI when
overriding the scheme in the widget's constructor. This only
happens when running the bundle, but not when running the
executable.
Work around that problem by setting the scheme immediately
after constructing QApplication.
Pick-to: 6.8
Task-number: QTBUG-126248
Change-Id: I4a5fe467d628fca5e52e1e36f43af8143239c7fa
Reviewed-by: Doris Verria <doris.verria@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Applications can request the color scheme to be either explicitly light
or dark, or to follow the system default by setting the scheme to
Qt::ColorScheme::Unknown.
Setting the color scheme will make the request to the QPlatformTheme
implementation, which can then use the appropriate implementation to
set the application's appearance so that both palette and window
decoration follow the requested color scheme. This should trigger
theme change and palette change events. A change to the effective
scheme should then call back into QStyleHintsPrivate::updateColorScheme,
which will emit the changed signal for the property.
Implement this for macOS (Cocoa), iOS, Android, and Windows.
On macOS, we have to use deprecated AppKit APIs; the replacements for
those APIs are not suitable for this use case. On iOS, the setting is
for each UIWindow, which we can update or initialize based on an
explicitly requested scheme.
On Android we can piggy-back on the logic added when dark theme support
was introduced in b4a9bb1f6a40e6d504c1f48f0d9ea2b70ab1a9f0.
On Windows, we have to fake a dark palette if the dark scheme is
requested on a light system, as there is no API to read a dark palette.
However, we also have to ignore any application preference if a high-
contrast accessibility theme is selected by the user (we report the
color scheme as unknown; there are both light and dark high-contrast
themes), and read the system palette using the GetSysColor API, which
is used for light mode. And we need to initialize windows with the
correct frame if the application explicitly overrides the system color
scheme.
Add an auto-test to the QApplication test, as that gives us the most
coverage to confirm that QStyleHints emits the changed signal, and that
Theme- and PaletteChange events are received by the toplevel widget
when the color scheme actually changes. This test has to be skipped
on platforms where we cannot set the color scheme programmatically.
Add the option to explicitly select the color scheme to the widget
gallery example, and default it to dark mode.
Fixes: QTBUG-124490
Change-Id: I7302993c0121284bf9d3b72e3149c6abbe6bd261
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.
Task-number: QTBUG-67283
Change-Id: Id880c92784c40f3bbde861c0d93f58151c18b9f1
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
This attribute is now on by default.
Change-Id: I7c9d2e3445d204d3450758673048d514bc9c850c
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Remove usages of Qt::AA_UseHighDpiPixmaps from examples/.
This flag is now on by default, and can't be disabled.
Task-number: QTBUG-83092
Change-Id: Ie28622f816da2fe28d4ab272d45ea20bd051d5f3
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Since 072ca960f517f0cdfcb768dcbeebba2212a6c21e changed the default
of the styles example back to Norwegian Wood, it is no longer
suited as gallery example.
Extract the dialog from it and re-add it as a gallery example Add a
tooltip displaying the class name and a help shortcut opening the
documentation.
Restructure the group boxes to add more widgets.
Remove the gallery meta-tag from the styles example.
Task-number: PYSIDE-1112
Change-Id: Ie6f13084012771bd8f5bf9cad23b58d0720fdd92
Reviewed-by: Cristian Maureira-Fredes <cristian.maureira-fredes@qt.io>
