Add a messagebar to layout designer

python/gui/layout/qgslayoutdesignerinterface.sip

@@ -46,6 +46,12 @@ Returns the layout view utilized by the designer.
 .. seealso:: :py:func:`layout()`
 %End
 
+    virtual QgsMessageBar *messageBar() = 0;
+%Docstring
+ Returns the designer's message bar.
+ :rtype: QgsMessageBar
+%End
+
     virtual void selectItems( const QList< QgsLayoutItem * > items ) = 0;
 %Docstring
 Selects the specified ``items``.

src/app/layout/qgslayoutdesignerdialog.cpp

@@ -93,6 +93,11 @@ QgsLayoutView *QgsAppLayoutDesignerInterface::view()
   return mDesigner->view();
 }
 
+QgsMessageBar *QgsAppLayoutDesignerInterface::messageBar()
+{
+  return mDesigner->messageBar();
+}
+
 void QgsAppLayoutDesignerInterface::selectItems( const QList<QgsLayoutItem *> items )
 {
   mDesigner->selectItems( items );
@@ -136,6 +141,10 @@ QgsLayoutDesignerDialog::QgsLayoutDesignerDialog( QWidget *parent, Qt::WindowFla
   centralWidget()->layout()->setMargin( 0 );
   centralWidget()->layout()->setContentsMargins( 0, 0, 0, 0 );
 
+  mMessageBar = new QgsMessageBar( centralWidget() );
+  mMessageBar->setSizePolicy( QSizePolicy::Minimum, QSizePolicy::Fixed );
+  static_cast< QGridLayout * >( centralWidget()->layout() )->addWidget( mMessageBar, 0, 0, 1, 1, Qt::AlignTop );
+
   mHorizontalRuler = new QgsLayoutRuler( nullptr, Qt::Horizontal );
   mVerticalRuler = new QgsLayoutRuler( nullptr, Qt::Vertical );
   mRulerLayoutFix = new QWidget();
@@ -1520,6 +1529,9 @@ void QgsLayoutDesignerDialog::exportToRaster()
   switch ( exporter.exportToImage( fileNExt.first, settings ) )
   {
     case QgsLayoutExporter::Success:
+      mMessageBar->pushInfo( tr( "Export layout" ), tr( "Successfully exported layout to %1" ).arg( fileNExt.first ) );
+      break;
+
     case QgsLayoutExporter::PrintError:
       break;
 
@@ -1614,11 +1626,14 @@ void QgsLayoutDesignerDialog::exportToPdf()
   switch ( exporter.exportToPdf( outputFileName, pdfSettings ) )
   {
     case QgsLayoutExporter::Success:
+    {
+      mMessageBar->pushInfo( tr( "Export layout" ), tr( "Successfully exported layout to %1" ).arg( outputFileName ) );
       break;
+    }
 
     case QgsLayoutExporter::FileError:
       QMessageBox::warning( this, tr( "Export to PDF" ),
-                            tr( "Cannot write to %1.\n\nThis file may be open in another application." ).arg( exporter.errorFile() ),
+                            tr( "Cannot write to %1.\n\nThis file may be open in another application." ).arg( outputFileName ),
                             QMessageBox::Ok,
                             QMessageBox::Ok );
       break;
@@ -1880,4 +1895,9 @@ void QgsLayoutDesignerDialog::selectItems( const QList<QgsLayoutItem *> items )
   }
 }
 
+QgsMessageBar *QgsLayoutDesignerDialog::messageBar()
+{
+  return mMessageBar;
+}
+
 

src/app/layout/qgslayoutdesignerdialog.h

@@ -42,6 +42,7 @@ class QUndoView;
 class QTreeView;
 class QgsLayoutItemsListView;
 class QgsLayoutPropertiesWidget;
+class QgsMessageBar;
 
 class QgsAppLayoutDesignerInterface : public QgsLayoutDesignerInterface
 {
@@ -51,6 +52,7 @@ class QgsAppLayoutDesignerInterface : public QgsLayoutDesignerInterface
     QgsAppLayoutDesignerInterface( QgsLayoutDesignerDialog *dialog );
     QgsLayout *layout() override;
     QgsLayoutView *view() override;
+    QgsMessageBar *messageBar() override;
     void selectItems( const QList< QgsLayoutItem * > items ) override;
 
   public slots:
@@ -114,6 +116,11 @@ class QgsLayoutDesignerDialog: public QMainWindow, private Ui::QgsLayoutDesigner
      */
     void selectItems( const QList< QgsLayoutItem * > items );
 
+    /**
+     * Returns the designer's message bar.
+     */
+    QgsMessageBar *messageBar();
+
   public slots:
 
     /**
@@ -286,6 +293,8 @@ class QgsLayoutDesignerDialog: public QMainWindow, private Ui::QgsLayoutDesigner
 
     QgsLayout *mLayout = nullptr;
 
+    QgsMessageBar *mMessageBar = nullptr;
+
     QActionGroup *mToolsActionGroup = nullptr;
 
     QgsLayoutView *mView = nullptr;

src/gui/layout/qgslayoutdesignerinterface.h

@@ -23,6 +23,7 @@
 class QgsLayout;
 class QgsLayoutView;
 class QgsLayoutItem;
+class QgsMessageBar;
 
 /**
  * \ingroup gui
@@ -61,6 +62,11 @@ class GUI_EXPORT QgsLayoutDesignerInterface: public QObject
      */
     virtual QgsLayoutView *view() = 0;
 
+    /**
+     * Returns the designer's message bar.
+     */
+    virtual QgsMessageBar *messageBar() = 0;
+
     /**
      * Selects the specified \a items.
      */