diff --git a/src/kconfigdialog.cpp b/src/kconfigdialog.cpp
--- a/src/kconfigdialog.cpp
+++ b/src/kconfigdialog.cpp
@@ -47,8 +47,7 @@
         if (!name.isEmpty()) {
             openDialogs.insert(name, q);
         } else {
-            QString genericName;
-            genericName.sprintf("SettingsDialog-%p", static_cast<void *>(q));
+            const QString genericName = QString::asprintf("SettingsDialog-%p", static_cast<void *>(q));
             openDialogs.insert(genericName, q);
             q->setObjectName(genericName);
         }
diff --git a/src/krecentfilesaction.cpp b/src/krecentfilesaction.cpp
--- a/src/krecentfilesaction.cpp
+++ b/src/krecentfilesaction.cpp
@@ -31,7 +31,9 @@
 #include <QFile>
 #include <QDesktopWidget>
 #include <QDir>
+#include <QGuiApplication>
 #include <QMenu>
+#include <QScreen>
 
 #include <kconfig.h>
 #include <kconfiggroup.h>
@@ -122,19 +124,19 @@
     // action titles to be bigger than that
     // Since we do not know in which screen we are going to show
     // we choose the min of all the screens
-    const QDesktopWidget desktopWidget;
     int maxWidthForTitles = INT_MAX;
-    for (int i = 0; i < desktopWidget.screenCount(); ++i) {
-        maxWidthForTitles = qMin(maxWidthForTitles, desktopWidget.availableGeometry(i).width() * 3 / 4);
+    const auto screens = QGuiApplication::screens();
+    for (QScreen *screen : screens) {
+        maxWidthForTitles = qMin(maxWidthForTitles, screen->availableGeometry().width() * 3 / 4);
     }
     const QFontMetrics fontMetrics = QFontMetrics(QFont());
 
     QString title = nameValue + QLatin1String(" [") + value + QLatin1Char(']');
-    if (fontMetrics.width(title) > maxWidthForTitles) {
+    const int nameWidth = fontMetrics.boundingRect(title).width();
+    if (nameWidth > maxWidthForTitles) {
         // If it does not fit, try to cut only the whole path, though if the
         // name is too long (more than 3/4 of the whole text) we cut it a bit too
         const int nameValueMaxWidth = maxWidthForTitles * 3 / 4;
-        const int nameWidth = fontMetrics.width(nameValue);
         QString cutNameValue, cutValue;
         if (nameWidth > nameValueMaxWidth) {
             cutNameValue = fontMetrics.elidedText(nameValue, Qt::ElideMiddle, nameValueMaxWidth);
diff --git a/src/ktipdialog.cpp b/src/ktipdialog.cpp
--- a/src/ktipdialog.cpp
+++ b/src/ktipdialog.cpp
@@ -34,6 +34,7 @@
 #include <QLabel>
 #include <QDesktopWidget>
 #include <QPushButton>
+#include <QScreen>
 #include <QTextBrowser>
 #include <QHBoxLayout>
 #include <QVBoxLayout>
@@ -291,10 +292,12 @@
         resize(520, 280);
         QSize sh = size();
 
-        QRect rect = QApplication::desktop()->screenGeometry(QCursor::pos());
-
-        move(rect.x() + (rect.width() - sh.width()) / 2,
-             rect.y() + (rect.height() - sh.height()) / 2);
+        QScreen *screen = QGuiApplication::screenAt(QCursor::pos());
+        if (screen) {
+            const QRect rect = screen->geometry();
+            move(rect.x() + (rect.width() - sh.width()) / 2,
+                    rect.y() + (rect.height() - sh.height()) / 2);
+        }
     }
 
     KSeparator *sep = new KSeparator(Qt::Horizontal);