Changes to Qt Extras Modules▲
Qt 6 is a result of the conscious effort to make the framework more efficient and easy to use.
We try to maintain binary and source compatibility for all the public APIs in each release. But some changes were inevitable in an effort to make Qt a better framework.
One of those changes was to remove the platform-specific Extras modules, to ensure a cohesive cross-platform story and future for Qt 6. Most of the the functionality offered by these modules are replaced by a similar functionality in other Qt modules. This guide summarizes those alternatives, and provides guidance for the cases where Qt does not offer a replacement API.
Changes to Qt Mac Extras▲
QtMac namespace▲
Most members of the QtMac namespace have explicit replacements. The QtMac::fromCGImageRef function has been removed due to lack of known clients of the API.
QMacPasteboardMime▲
The QMacPasteboardMime class has been removed due to warranting a cross-platform solution. See QTBUG-93632 for details.
QMacToolBar▲
The QMacToolBar and QMacToolBarItem classes have been removed. Use QToolBar as a replacement.
Changes to Qt Windows Extras▲
QtWin namespace▲
Many members of the QtWin namespace have explicit replacements. To use these replacements with Qt Widgets or Qt Quick, operate on the QWindow representation of the relevant widget or control.
The remaining functions have been removed:
errorStringFromHresult▲
Only used internally in WinExtras. No other known clients of the API.
colorizationColor/isCompositionOpaque▲
Concept exists on other platforms (tint/accent color). Warrants new cross-platform API, for example a new QPalette role or platform theme property.
setWindowFlip3DPolicy▲
Windows 7 feature. No longer supported in Windows 10.
extendFrameIntoClientArea▲
Similar functionality exists on other platforms. Warrants cross-platform QWindow API to control the relationship between the client area and the non-client area (frame/titlebar). See QTBUG-94010 for details.
enableBlurBehind▲
Deprecated as of Windows 8.
taskbarActivateTab and taskbar(Add/Delete)Tab▲
No known clients of the API.
QWinMime▲
The QWinMime class has been removed due to warranting a cross-platform solution. See QTBUG-93632 for details.
Clients that still rely on the functionality can include the private headers <QtGui/private/qtguiapplication_p.h> and <QtGui/private/qwindowsmime_p.h> and use the QWindowsApplication native interface to register new MIME types. To enable private headers use QT += gui-private with qmake, or add a project dependency to Qt::GuiPrivate with CMake.
QWinJumpList▲
The QWinJumpList, QWinJumpListCategory, and QWinJumpListItem classes have been removed due to warranting a cross-platform solution. See QTBUG-94007 for details.
QWinTaskbarButton▲
QWinThumbnailToolBar▲
The QWinThumbnailToolBar and QWinThumbnailToolButton classes have been removed due to lack of known clients of the API.
Changes to Qt X11 Extras▲
The Qt X11 Extras module was removed in Qt 6.
-
For QX11Info::connection(), use QNativeInterface::QX11Application::connection() instead.
-
For QX11Info::display(), use QNativeInterface::QX11Application::display() instead.
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For QX11Info::isPlatformX11(), check QNativeInterface::QX11Application existence instead.
Make sure to check you can get a QNativeInterface::QX11Application object from QGuiApplication, as in the following snippet:
Display *display = nullptr;
xcb_connection_t *connection = nullptr;
bool isPlatformX11 = false;
if (auto *x11Application = qGuiApp->nativeInterface<QNativeInterface::QX11Application>()) {
display = x11Application->display();
connection = x11Application->connection();
isPlatformX11 = true;
}
// or
// isPlatformX11 = qGuiApp->nativeInterface<QNativeInterface::QX11Application>();Clients that still rely on the functionality in QX11Info class can include the private header <QtGui/private/qtx11extras_p.h> as a stopgap solution. To enable private headers use QT += gui-private with qmake, or add a project dependency to Qt::GuiPrivate with CMake.
Changes to Qt Android Extras▲
Key functionality from the module has been brought over to other Qt modules.
Clients that still rely on missing functionality can include the private header <QtCore/private/qandroidextras_p.h> as a stopgap solution. To enable private headers use QT += core-private with qmake, or add a project dependency to Qt::CorePrivate with CMake.
QAndroidJniObject and QAndroidJniEnvironment▲
The QAndroidJniObject and QAndroidJniEnvironment classes have been replaced by QJniObject and QJniEnvironment respectively.
The QAndroidJniExceptionCleaner class is no longer needed. See QJniEnvironment::checkAndClearExceptions() for a replacement.
QtAndroid namespace▲
Many members of the QtAndroid namespace have replacements in the QAndroidApplication native interface.