diff --git a/src/declarativeimports/core/tooltip.h b/src/declarativeimports/core/tooltip.h
--- a/src/declarativeimports/core/tooltip.h
+++ b/src/declarativeimports/core/tooltip.h
@@ -187,6 +187,12 @@
     void locationChanged();
     void activeChanged();
     void interactiveChanged();
+    /**
+     * Emitted just before the tooltip dialog is shown.
+     *
+     * @since 5.45
+     */
+    void aboutToShow();
 
 private Q_SLOTS:
     void settingsChanged(const QString &file);
diff --git a/src/declarativeimports/core/tooltip.cpp b/src/declarativeimports/core/tooltip.cpp
--- a/src/declarativeimports/core/tooltip.cpp
+++ b/src/declarativeimports/core/tooltip.cpp
@@ -130,6 +130,8 @@
         return;
     }
 
+    emit aboutToShow();
+
     ToolTipDialog *dlg = tooltipDialogInstance();
 
     if (!mainItem()) {