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Add helper to react to darkmode changes

This commit is contained in:
Martchus 2024-03-31 22:48:22 +02:00
parent d20130d770
commit ded20b34a6
2 changed files with 28 additions and 0 deletions
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23
misc/desktoputils.cpp
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@ -69,4 +69,27 @@ std::optional<bool> isDarkModeEnabled()
return std::nullopt;
}
/*!
* \brief Invokes the specified callback when the color scheme changed.
*
* The first argument of the callback will be whether the color scheme is dark now (Qt::ColorScheme::Dark).
* The callback is invoked immediately by this function unless \a invokeImmediately is set to false.
*
* \remarks Whether dark mode is enabled can only be determined on Qt 6.5 or newer and only on certain
* platforms. If it cannot be determined the \a darkModeChangedCallback is never invoked.
*/
QMetaObject::Connection onDarkModeChanged(std::function<void(bool)> &&darkModeChangedCallback, QObject *context, bool invokeImmediately)
{
#if (QT_VERSION >= QT_VERSION_CHECK(6, 5, 0))
if (const auto *const styleHints = QGuiApplication::styleHints()) {
if (invokeImmediately) {
darkModeChangedCallback(styleHints->colorScheme() == Qt::ColorScheme::Dark);
}
return QObject::connect(styleHints, &QStyleHints::colorSchemeChanged, context,
[handler = std::move(darkModeChangedCallback)](Qt::ColorScheme colorScheme) { return handler(colorScheme == Qt::ColorScheme::Dark); });
}
#endif
return QMetaObject::Connection();
}
} // namespace QtUtilities

5
misc/desktoputils.h
View File

@ -3,10 +3,13 @@
#include "../global.h"
#include <QMetaObject>
#include <QPalette>
#include <functional>
#include <optional>
QT_FORWARD_DECLARE_CLASS(QObject)
QT_FORWARD_DECLARE_CLASS(QString)
namespace QtUtilities {
@ -14,6 +17,8 @@ namespace QtUtilities {
QT_UTILITIES_EXPORT bool openLocalFileOrDir(const QString &path);
QT_UTILITIES_EXPORT bool isPaletteDark(const QPalette &palette = QPalette());
QT_UTILITIES_EXPORT std::optional<bool> isDarkModeEnabled();
QT_UTILITIES_EXPORT QMetaObject::Connection onDarkModeChanged(
std::function<void(bool)> &&darkModeChangedCallback, QObject *context = nullptr, bool invokeImmediately = true);
} // namespace QtUtilities