diff --git a/python/gui/qgsmessagebar.sip.in b/python/gui/qgsmessagebar.sip.in
index cb14323d32c..10dc98e19f3 100644
--- a/python/gui/qgsmessagebar.sip.in
+++ b/python/gui/qgsmessagebar.sip.in
@@ -78,6 +78,13 @@ convenience method for pushing a message to the bar
 convenience method for pushing a message with title to the bar
 %End
 
+    void pushMessage( const QString &title, const QString &text, const QString &showMore, Qgis::MessageLevel level = Qgis::Info, int duration = 5 );
+%Docstring
+convenience method for pushing a message to the bar with a detail text which be shown when pressing a "more" button
+%End
+
+
+
     QgsMessageBarItem *currentItem();
 
   signals:
diff --git a/src/gui/qgsmessagebar.cpp b/src/gui/qgsmessagebar.cpp
index feba01d88cd..1854789efde 100644
--- a/src/gui/qgsmessagebar.cpp
+++ b/src/gui/qgsmessagebar.cpp
@@ -19,6 +19,7 @@
 #include "qgsmessagebaritem.h"
 #include "qgsapplication.h"
 #include "qgsmessagelog.h"
+#include "qgsmessageviewer.h"
 
 #include <QWidget>
 #include <QPalette>
@@ -298,6 +299,32 @@ void QgsMessageBar::pushMessage( const QString &title, const QString &text, Qgis
   pushItem( item );
 }
 
+void QgsMessageBar::pushMessage( const QString &title, const QString &text, const QString &showMore, Qgis::MessageLevel level, int duration )
+{
+  QgsMessageViewer *mv = new QgsMessageViewer();
+  mv->setWindowTitle( title );
+  mv->setMessageAsPlainText( text + "\n\n" + showMore );
+
+  QToolButton *showMoreButton = new QToolButton();
+  QAction *act = new QAction( showMoreButton );
+  act->setText( tr( "Show more" ) );
+  showMoreButton->setStyleSheet( QStringLiteral( "background-color: rgba(255, 255, 255, 0); color: black; text-decoration: underline;" ) );
+  showMoreButton->setCursor( Qt::PointingHandCursor );
+  showMoreButton->setSizePolicy( QSizePolicy::Maximum, QSizePolicy::Preferred );
+  showMoreButton->addAction( act );
+  showMoreButton->setDefaultAction( act );
+  connect( showMoreButton, &QToolButton::triggered, mv, &QDialog::exec );
+  connect( showMoreButton, &QToolButton::triggered, showMoreButton, &QObject::deleteLater );
+
+  QgsMessageBarItem *item = new QgsMessageBarItem(
+    title,
+    text,
+    showMoreButton,
+    level,
+    duration );
+  pushItem( item );
+}
+
 QgsMessageBarItem *QgsMessageBar::createMessage( const QString &text, QWidget *parent )
 {
   QgsMessageBarItem *item = new QgsMessageBarItem( text, Qgis::Info, 0, parent );
diff --git a/src/gui/qgsmessagebar.h b/src/gui/qgsmessagebar.h
index 2e326a449e4..f689e6dd2e7 100644
--- a/src/gui/qgsmessagebar.h
+++ b/src/gui/qgsmessagebar.h
@@ -89,6 +89,13 @@ class GUI_EXPORT QgsMessageBar: public QFrame
     //! convenience method for pushing a message with title to the bar
     void pushMessage( const QString &title, const QString &text, Qgis::MessageLevel level = Qgis::Info, int duration = 5 );
 
+    //! convenience method for pushing a message to the bar with a detail text which be shown when pressing a "more" button
+    void pushMessage( const QString &title, const QString &text, const QString &showMore, Qgis::MessageLevel level = Qgis::Info, int duration = 5 );
+
+//    //! make out a widget containing a message to be displayed on the bar with a detail text which be shown when pressing a "more" button
+//    QgsMessageBarItem( const QString &title, const QString &text, const QString &showMore, Qgis::MessageLevel level = Qgis::Info, int duration = 0, QWidget *parent SIP_TRANSFERTHIS = nullptr );
+
+
     QgsMessageBarItem *currentItem() { return mCurrentItem; }
 
   signals: