Various Qt6 compile fixes

Task-number: QTCREATORBUG-24098
Change-Id: Ia0fe92d82d4477bd8f14ee25754b114316fc878a
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/utils/porting.h

@@ -37,4 +37,10 @@ constexpr QString::SplitBehavior SkipEmptyParts = QString::SkipEmptyParts;
 constexpr Qt::SplitBehaviorFlags SkipEmptyParts = Qt::SkipEmptyParts;
 #endif
 
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
+using QHashSeedType = uint;
+#else
+using QHashSeedType = size_t;
+#endif
+
 } // namespace Utils

src/plugins/coreplugin/dialogs/codecselector.h

@@ -31,6 +31,7 @@
 #include <QLabel>
 #include <QDialogButtonBox>
 #include <QListWidget>
+#include <QTextCodec>
 
 namespace Utils { class ListWidget; }
 namespace Core { class BaseTextDocument; }

src/plugins/coreplugin/dialogs/readonlyfilesdialog.cpp

@@ -465,7 +465,7 @@ void ReadOnlyFilesDialogPrivate::initDialog(const FilePaths &filePaths)
 
         // Also save the buttongroup for every file to get the result for each entry.
         buttonGroups.append({filePath, radioButtonGroup});
-        QObject::connect(radioButtonGroup, QOverload<int>::of(&QButtonGroup::buttonClicked),
+        QObject::connect(radioButtonGroup, QOverload<QAbstractButton *>::of(&QButtonGroup::buttonClicked),
                          [this] { updateSelectAll(); });
     }
 

src/plugins/coreplugin/editormanager/editormanager.h

@@ -29,6 +29,7 @@
 #include "../idocument.h"
 
 #include "documentmodel.h"
+#include "ieditor.h"
 
 #include "utils/textfileformat.h"
 
@@ -43,7 +44,6 @@ namespace Utils { class MimeType; }
 
 namespace Core {
 
-class IEditor;
 class IDocument;
 class SearchResultItem;
 

src/plugins/coreplugin/externaltool.cpp

@@ -453,7 +453,7 @@ ExternalTool * ExternalTool::createFromXml(const QByteArray &xml, QString *error
                     tool->m_environment = EnvironmentItem::fromStringList(lines);
                 } else {
                     reader.raiseError(QString::fromLatin1("Unknown element <%1> as subelement of <%2>").arg(
-                                          reader.qualifiedName().toString(), kExecutable));
+                                          reader.qualifiedName().toString(), QString(kExecutable)));
                     break;
                 }
             }

src/plugins/coreplugin/icore.h

@@ -26,7 +26,7 @@
 #pragma once
 
 #include "core_global.h"
-#include "id.h"
+#include "icontext.h"
 
 #include <QList>
 #include <QMainWindow>
@@ -48,7 +48,6 @@ class InfoBar;
 
 namespace Core {
 class Context;
-class IContext;
 class IWizardFactory;
 class SettingsDatabase;
 

src/plugins/coreplugin/ifilewizardextension.h

@@ -25,7 +25,8 @@
 
 #pragma once
 
-#include <coreplugin/core_global.h>
+#include "core_global.h"
+#include "generatedfile.h"
 
 #include <QObject>
 #include <QList>
@@ -38,7 +39,6 @@ QT_END_NAMESPACE
 namespace Core {
 
 class IWizardFactory;
-class GeneratedFile;
 
 /*!
   Hook to add generic wizard pages to implementations of IWizard.

src/plugins/coreplugin/mainwindow.cpp

@@ -76,6 +76,7 @@
 #include <utils/stringutils.h>
 #include <utils/utilsicons.h>
 
+#include <QActionGroup>
 #include <QApplication>
 #include <QCloseEvent>
 #include <QColorDialog>

src/plugins/coreplugin/menubarfilter.cpp

@@ -32,6 +32,7 @@
 #include "locator/locatormanager.h"
 
 #include <utils/algorithm.h>
+#include <utils/porting.h>
 #include <utils/qtcassert.h>
 #include <utils/stringutils.h>
 
@@ -41,7 +42,7 @@
 #include <QTimer>
 
 QT_BEGIN_NAMESPACE
-uint qHash(const QPointer<QAction> &p, uint seed)
+uint qHash(const QPointer<QAction> &p, Utils::QHashSeedType seed)
 {
     return qHash(p.data(), seed);
 }

src/plugins/imageviewer/multiexportdialog.cpp

@@ -300,7 +300,8 @@ void MultiExportDialog::accept()
     }
     if (data.size() > 1 && data.at(0).fileName == data.at(1).fileName) {
         QMessageBox::warning(this, windowTitle(),
-                             tr("The file name must contain one of the placeholders %1, %2.").arg("%1", "%2"));
+                             tr("The file name must contain one of the placeholders %1, %2.")
+                                .arg(QString("%1"), QString("%2")));
         return;
     }
 

src/plugins/texteditor/behaviorsettingspage.h

@@ -31,6 +31,10 @@
 
 #include <coreplugin/dialogs/ioptionspage.h>
 
+QT_BEGIN_NAMESPACE
+class QTextCodec;
+QT_END_NAMESPACE
+
 namespace TextEditor {
 
 class TabSettings;