Changes for 3ds Max 2021

 - Fixing the QStyleSheetStyle to remove the additional width put into the spin-box's width - even with no style applied
 - Make QTabBar and QTabWidget capable of multiRow tab layout
 - Merging all 3ds Max specific changes from Qt 5.12.4 into Qt 5.12.5
 - Fixes a int32 to int 64 cast bug in the WM_TIMER event which causes UI hangs on
   windows64 because the WM_TIMER fall-through to WM_QT_SENDPOSTEDEVENTS
   doesn't call sendPostedEvents anymore.
 - Updates the DLL version for libEGL.dll and libGLESv2.dll for the 2020.3_Update
 - Incorporating official fixes for QTBUG-75820 and QTBUG-76990
 - Reverting commits #70d131a and #bde6a04 since they conflict with 3ds Max

qmake/generators/win32/winmakefile.cpp

@@ -287,8 +287,18 @@ void Win32MakefileGenerator::processRcFileVar()
         QTextStream ts(&rcString, QFile::WriteOnly);
 
         QStringList vers = project->first("VERSION").toQString().split(".", QString::SkipEmptyParts);
+        //---------------------------------------------------------------------
+        // Autodesk 3ds Max Addition:
+        // Qt defaults to "0" here, what we use for 3ds Max Release, but change
+        // that to "1" for update 1, "2" for update 2. "3" for update 3, etc.
+        // This is needed to allow the patch scripts to replace the dlls with
+        // the newer version during the update installation.
+        // "5.12.1.0" -> "5.12.1.*"
+        //---------------------------------------------------------------------
         for (int i = vers.size(); i < 4; i++)
-            vers += "0";
+        {
+            vers += "0"; //for 3ds Max 
+        }
         QString versionString = vers.join('.');
 
         QStringList rcIcons;

src/3rdparty/angle/src/common/version.h

@@ -7,7 +7,7 @@
 #ifndef COMMON_VERSION_H_
 #define COMMON_VERSION_H_
 
-#include "id/commit.h"
+#include "../../id/commit.h"
 
 #define ANGLE_MAJOR_VERSION 2
 #define ANGLE_MINOR_VERSION 1

src/3rdparty/angle/src/libEGL/libEGL.rc

@@ -0,0 +1,103 @@
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include <windows.h>
+#include "../common/version.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "#include ""afxres.h""\r\n"
+    "#include ""../common/version.h""\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION ANGLE_MAJOR_VERSION,ANGLE_MINOR_VERSION,0,1 // For 3dsMax 2020 Update 3 patch generation we increment the version
+ PRODUCTVERSION ANGLE_MAJOR_VERSION,ANGLE_MINOR_VERSION,0,0
+ FILEFLAGSMASK 0x17L
+#ifdef _DEBUG
+ FILEFLAGS 0x1L
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS 0x4L
+ FILETYPE 0x2L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "FileDescription", "ANGLE libEGL Dynamic Link Library"
+            VALUE "FileVersion", ANGLE_VERSION_STRING
+            VALUE "InternalName", "libEGL"
+            VALUE "LegalCopyright", "Copyright (C) 2011 Google Inc."
+            VALUE "OriginalFilename", "libEGL.dll"
+            VALUE "PrivateBuild", ANGLE_VERSION_STRING
+            VALUE "ProductName", "ANGLE libEGL Dynamic Link Library"
+            VALUE "ProductVersion", ANGLE_VERSION_STRING
+            VALUE "Comments", "Build Date: " ANGLE_COMMIT_DATE
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED

src/3rdparty/angle/src/libGLESv2/libGLESv2.rc

@@ -0,0 +1,103 @@
+// Microsoft Visual C++ generated resource script.
+//
+#include "resource.h"
+
+#define APSTUDIO_READONLY_SYMBOLS
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 2 resource.
+//
+#include <windows.h>
+#include "../common/version.h"
+
+/////////////////////////////////////////////////////////////////////////////
+#undef APSTUDIO_READONLY_SYMBOLS
+
+/////////////////////////////////////////////////////////////////////////////
+// English (U.S.) resources
+
+#if !defined(AFX_RESOURCE_DLL) || defined(AFX_TARG_ENU)
+#ifdef _WIN32
+LANGUAGE LANG_ENGLISH, SUBLANG_ENGLISH_US
+#pragma code_page(1252)
+#endif //_WIN32
+
+#ifdef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// TEXTINCLUDE
+//
+
+1 TEXTINCLUDE 
+BEGIN
+    "resource.h\0"
+END
+
+2 TEXTINCLUDE 
+BEGIN
+    "#include ""afxres.h""\r\n"
+    "#include ""../common/version.h""\0"
+END
+
+3 TEXTINCLUDE 
+BEGIN
+    "\r\n"
+    "\0"
+END
+
+#endif    // APSTUDIO_INVOKED
+
+
+/////////////////////////////////////////////////////////////////////////////
+//
+// Version
+//
+
+VS_VERSION_INFO VERSIONINFO
+ FILEVERSION ANGLE_MAJOR_VERSION,ANGLE_MINOR_VERSION,0,1 // For 3dsMax 2020 Update 3 patch generation we increment the version
+ PRODUCTVERSION ANGLE_MAJOR_VERSION,ANGLE_MINOR_VERSION,0,0
+ FILEFLAGSMASK 0x17L
+#ifdef _DEBUG
+ FILEFLAGS 0x1L
+#else
+ FILEFLAGS 0x0L
+#endif
+ FILEOS 0x4L
+ FILETYPE 0x2L
+ FILESUBTYPE 0x0L
+BEGIN
+    BLOCK "StringFileInfo"
+    BEGIN
+        BLOCK "040904b0"
+        BEGIN
+            VALUE "FileDescription", "ANGLE libGLESv2 Dynamic Link Library"
+            VALUE "FileVersion", ANGLE_VERSION_STRING
+            VALUE "InternalName", "libGLESv2"
+            VALUE "LegalCopyright", "Copyright (C) 2011 Google Inc."
+            VALUE "OriginalFilename", "libGLESv2.dll"
+            VALUE "PrivateBuild", ANGLE_VERSION_STRING
+            VALUE "ProductName", "ANGLE libGLESv2 Dynamic Link Library"
+            VALUE "ProductVersion", ANGLE_VERSION_STRING
+            VALUE "Comments", "Build Date: " ANGLE_COMMIT_DATE
+        END
+    END
+    BLOCK "VarFileInfo"
+    BEGIN
+        VALUE "Translation", 0x409, 1200
+    END
+END
+
+#endif    // English (U.S.) resources
+/////////////////////////////////////////////////////////////////////////////
+
+
+
+#ifndef APSTUDIO_INVOKED
+/////////////////////////////////////////////////////////////////////////////
+//
+// Generated from the TEXTINCLUDE 3 resource.
+//
+
+
+/////////////////////////////////////////////////////////////////////////////
+#endif    // not APSTUDIO_INVOKED

src/angle/src/libEGL/libEGL.pro

@@ -26,3 +26,5 @@ egl_headers.files = \
     $$ANGLE_DIR/include/EGL/eglplatform.h
 egl_headers.path = $$[QT_INSTALL_HEADERS]/QtANGLE/EGL
 INSTALLS += egl_headers
+
+RC_FILE = $$ANGLE_DIR/src/libEGL/libEGL.rc

src/angle/src/libGLESv2/libGLESv2.pro

@@ -10,3 +10,5 @@ TARGET = $$qtLibraryTarget($${LIBGLESV2_NAME})
 } else {
     DEFINES += DllMain=DllMain_ANGLE # prevent symbol from conflicting with the user's DllMain
 }
+
+RC_FILE = $$ANGLE_DIR/src/libGLESv2/libGLESv2.rc

src/corelib/kernel/qeventdispatcher_win.cpp

@@ -231,7 +231,7 @@ LRESULT QT_WIN_CALLBACK qt_internal_proc(HWND hwnd, UINT message, WPARAM wp, LPA
     }
     case WM_TIMER:
         if (d->sendPostedEventsWindowsTimerId == 0
-            || wp != uint(d->sendPostedEventsWindowsTimerId)) {
+            || wp != static_cast<UINT_PTR>(d->sendPostedEventsWindowsTimerId)) {
             Q_ASSERT(d != 0);
             d->sendTimerEvent(wp);
             return 0;

src/plugins/platforms/windows/qwindowscontext.cpp

@@ -735,6 +735,11 @@ static inline bool findPlatformWindowHelper(const POINT &screenPoint, unsigned c
     if (!(cwexFlags & CWP_SKIPTRANSPARENT)
         && (GetWindowLongPtr(child, GWL_EXSTYLE) & WS_EX_TRANSPARENT)) {
         const HWND nonTransparentChild = ChildWindowFromPointEx(*hwnd, point, cwexFlags | CWP_SKIPTRANSPARENT);
+
+        if ( !nonTransparentChild || nonTransparentChild == *hwnd ) {
+            return false;
+        }
+
         if (QWindowsWindow *nonTransparentWindow = context->findPlatformWindow(nonTransparentChild)) {
             *result = nonTransparentWindow;
             *hwnd = nonTransparentChild;

src/plugins/platforms/windows/qwindowsdrag.h

@@ -54,6 +54,8 @@ QT_BEGIN_NAMESPACE
 class QPlatformScreen;
 
 class QWindowsDropMimeData : public QWindowsInternalMimeData {
+    Q_OBJECT
+    Q_PROPERTY( IDataObject* IDataObject READ retrieveDataObject )
 public:
     QWindowsDropMimeData() = default;
     IDataObject *retrieveDataObject() const override;

src/plugins/platforms/windows/qwindowswindow.cpp

@@ -2473,7 +2473,37 @@ void QWindowsWindow::requestActivateWindow()
                 }
             }
         }
-        SetForegroundWindow(m_data.hwnd);
+
+        //------------------------------------------------------------------
+        // Autodesk 3ds Max addition: When 3ds Max starts up we have a lot 
+        // of focus stealing issues of 3ds Max on other applications foreground
+        // windows. This is caused by the call to SetForegroundWindow() 
+        // whenever a Qt window gets focused / activated.
+        // To prevent this we make the SetForegroundWindow() call conditional 
+        // on a flag that 3ds Max can set when it is launching.
+        // Note that QWindow::requestActivate() offers a possiblity via the
+        // flag 'Qt::WindowDoesNotAcceptFocus' to suppress calls to 
+        // QWindowsWindow::requestActivateWindow() for that window, but using 
+        // the flag would disable both calls to SetForegroundWindow() and 
+        // SetFocus(), which is not useful in the case of 3ds Max, since it 
+        // can execute scripts on start up that popup Qt windows which rely 
+        // on the proper focus setting.
+        //------------------------------------------------------------------
+        bool doSetForegroundWnd = true;
+        if ( qApp )
+        {
+            auto prop = qApp->property( "_3dsmax_disableSetForegroundWnd" );
+            if ( prop.isValid() && prop.toBool() == true )
+            {
+                doSetForegroundWnd = false;
+            }
+        }
+
+        if ( doSetForegroundWnd )
+        {
+            SetForegroundWindow(m_data.hwnd);
+        }
+
         SetFocus(m_data.hwnd);
         if (attached)
             AttachThreadInput(foregroundThread, currentThread, FALSE);

src/plugins/platforms/windows/uiautomation/qwindowsuiautils.cpp

@@ -85,6 +85,26 @@ QWindow *windowForAccessible(const QAccessibleInterface *accessible)
 // Usually it will be NULL, as Qt5 by default uses alien widgets with no native windows.
 HWND hwndForAccessible(const QAccessibleInterface *accessible)
 {
+    //-------------------------------------------------------------------------
+    // Autodesk 3ds Max Addition
+    //-------------------------------------------------------------------------
+    // Some QWidgets in 3ds Max are hosting native legacy HWNDs showing various
+    // UI elements. Since those are just shallow wrappers around the embedded
+    // HWNDs, we directly jump to the embedded HWND here.
+    // The 3ds Max team has patched the QWinHost class of the QtWinMigrate
+    // project also to use this property accordingly.
+    //-------------------------------------------------------------------------
+    if (auto obj = accessible->object()) {
+        auto prop = obj->property("_3dsmax_hosted_hwnd");
+        if (prop.isValid()) {
+            if (auto nativeChildHWND = reinterpret_cast<HWND>(qvariant_cast<void *>(prop))) {
+                if (IsWindow(nativeChildHWND)) {
+                    return nativeChildHWND;
+                }
+            }
+        }
+    }
+
     if (QWindow *window = accessible->window()) {
         if (!accessible->parent() || (accessible->parent()->window() != window)) {
             return QWindowsBaseWindow::handleOf(window);

src/widgets/accessible/qaccessiblewidget.cpp

@@ -99,11 +99,19 @@ static QString buddyString(const QWidget *widget)
     }
 #endif
 
-#if QT_CONFIG(groupbox)
-    QGroupBox *groupbox = qobject_cast<QGroupBox*>(parent);
-    if (groupbox)
-        return groupbox->title();
-#endif
+
+//----------------------------------------------------------------------------
+// Autodesk 3ds Max change: We don't want that behavior to happen, cause this
+// additional buddy-string thing is interfering with our automation scripts. 
+// We often have a bunch of widgets inside a groupbox that do not have an 
+// explicit accessible name set, so this would lead to a ton of spinners that
+// share the same name.
+// #if QT_CONFIG(groupbox)
+//    QGroupBox *groupbox = qobject_cast<QGroupBox*>(parent);
+//    if (groupbox)
+//        return groupbox->title();
+// #endif
+//----------------------------------------------------------------------------
 
     return QString();
 }
@@ -434,10 +442,24 @@ QString QAccessibleWidget::text(QAccessible::Text t) const
                 str = qt_setWindowTitle_helperHelper(widget()->windowTitle(), widget());
         } else {
             str = qt_accStripAmp(buddyString(widget()));
+            //----------------------------------------------------------------
+            // Autodesk 3ds Max change: If no specific string has been set and
+            // no buddy eigther, we will fall back to use the objectname - or 
+            // even the class name for fixing that.
+            //----------------------------------------------------------------
+            if ( !widget()->inherits("QGroupBox") && !widget()->inherits("QMenu") )
+            {
+                if (str.isEmpty())
+                    str = widget()->objectName();
+                if (str.isEmpty())
+                    str = widget()->metaObject()->className();
+            }
         }
         break;
     case QAccessible::Description:
         str = widget()->accessibleDescription();
+        if (str.isEmpty())
+            str = widget()->objectName();
 #ifndef QT_NO_TOOLTIP
         if (str.isEmpty())
             str = widget()->toolTip();