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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
/*!
\page extras-changes-qt6.html
\title Changes to Qt Extras Modules
\brief Changes to Qt Mac Extras, Qt Windows Extras, and Qt X11 Extras.
\ingroup changes-qt-5-to-6
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.
\section1 Changes to Qt Mac Extras
\section2 QtMac namespace
Most members of the QtMac namespace have \qt5{qtmac-obsolete.html}
{explicit replacements}. The \qt5{qtmac-obsolete.html#fromCGImageRef}
{QtMac::fromCGImageRef} function has been removed due to lack of
known clients of the API.
\section2 QMacPasteboardMime
The \qt5{qmacpasteboardmime.html}{QMacPasteboardMime} class has been
replaced with \l QUtiMimeConverter. See \l{Changes to Qt GUI#Native clipboard integration}
for details.
\section2 QMacToolBar
The \qt5{qmactoolbar.html}{QMacToolBar} and \qt5{qmactoolbaritem.html}
{QMacToolBarItem} classes have been removed. Use QToolBar as a replacement.
\section1 Changes to Qt Windows Extras
\section2 QtWin namespace
Many members of the QtWin namespace have \qt5{qtwin-obsolete.html}
{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:
\section3 errorStringFromHresult
Only used internally in WinExtras. No other known clients of the API.
\section3 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.
\section3 setWindowFlip3DPolicy
Windows 7 feature. No longer supported in Windows 10.
\section3 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 QTBUG-94010 for details.
\section3 enableBlurBehind
Deprecated as of Windows 8.
\section3 taskbarActivateTab and taskbar(Add/Delete)Tab
No known clients of the API.
\section2 QWinMime
The \qt5{qwinmime.html}{QWinMime} class has been replaced with \l QWindowsMimeConverter.
See \l{Changes to Qt GUI#Native clipboard integration} for details.
\section2 QWinJumpList
The \qt5{qwinjumplist.html}{QWinJumpList}, \qt5{qwinjumplistcategory.html}
{QWinJumpListCategory}, and \qt5{qwinjumplistitem.html}{QWinJumpListItem}
classes have been removed due to warranting a cross-platform solution.
See \qtbug QTBUG-94007 for details.
\section2 QWinTaskbarButton
The \qt5{qwintaskbarbutton.html}{QWinTaskbarButton} and \qt5{qwintaskbarprogress.html}
{QWinTaskbarProgress} classes have been removed due to warranting a cross-platform
solution. See \qtbug QTBUG-94009 and \qtbug QTBUG-94008 for details.
\section2 QWinThumbnailToolBar
The \qt5{qwinthumbnailtoolbar.html}{QWinThumbnailToolBar} and
\qt5{qwinthumbnailtoolbutton.html}{QWinThumbnailToolButton}
classes have been removed due to lack of known clients of the API.
\section1 Changes to Qt X11 Extras
The \l {https://doc.qt.io/qt-5/qtx11extras-index.html}{Qt X11 Extras} module was removed in Qt 6.
\list
\li For QX11Info::connection(), use QNativeInterface::QX11Application::connection() instead.
\li For QX11Info::display(), use QNativeInterface::QX11Application::display() instead.
\li For QX11Info::isPlatformX11(), check QNativeInterface::QX11Application existence instead.
\endlist
Make sure to check you can get a QNativeInterface::QX11Application object from QGuiApplication,
as in the following snippet:
\snippet snippets/porting-qx11info/testwindow.cpp 1
Clients that still rely on the functionality in \qt5{qx11info.html}{QX11Info}
class can include the private
header \c {<QtGui/private/qtx11extras_p.h>} as a stopgap solution.
To enable private headers use \c {QT += gui-private} with \c qmake,
or add a project dependency to \c Qt::GuiPrivate with \c CMake.
\section1 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 \c {<QtCore/private/qandroidextras_p.h>} as a stopgap solution.
To enable private headers use \c {QT += core-private} with \c qmake,
or add a project dependency to \c Qt::CorePrivate with \c CMake.
\section2 QAndroidJniObject and QAndroidJniEnvironment
The \qt5{qandroidjniobject.html}{QAndroidJniObject} and
\qt5{qandroidjnienvironment.html}{QAndroidJniEnvironment}
classes have been replaced by \l QJniObject and \l QJniEnvironment
respectively.
The \qt5{qandroidjniexceptioncleaner.html}{QAndroidJniExceptionCleaner}
class is no longer needed. See QJniEnvironment::checkAndClearExceptions()
for a replacement.
\section2 QtAndroid namespace
Many members of the QtAndroid namespace have replacements in the
\l {QNativeInterface::}{QAndroidApplication} native interface.
\section2 Permissions
The \l {Application Permissions} infrastructure allows requesting a set of
permissions in a cross-platform manner.
The \l QtAndroidPrivate namespace can be used to access Android-specific
permissions not covered by the cross-platform permissions system.
*/
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