Handle pan via scrollbar in zoom history

qgis · Oct 28, 2024 · 671c092 · 671c092
1 parent d803360
commit 671c092
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diff --git a/src/gui/layout/qgslayoutview.cpp b/src/gui/layout/qgslayoutview.cpp
@@ -39,6 +39,7 @@
 #include <QMenu>
 #include <QClipboard>
 #include <QMimeData>
+#include <QScrollBar>
 
 #define MIN_VIEW_SCALE 0.05
 #define MAX_VIEW_SCALE 1000.0
@@ -67,6 +68,9 @@ QgsLayoutView::QgsLayoutView( QWidget *parent )
   connect( this, &QgsLayoutView::zoomLevelChanged, this, &QgsLayoutView::invalidateCachedRenders );
   connect( this, &QgsLayoutView::zoomLevelChanged, this, &QgsLayoutView::extentChanged );
 
+  verticalScrollBar()->installEventFilter( this );
+  horizontalScrollBar()->installEventFilter( this );
+
   mScreenHelper = new QgsScreenHelper( this );
 }
 
@@ -1301,6 +1305,17 @@ void QgsLayoutView::wheelZoom( QWheelEvent *event )
   }
 }
 
+
+bool QgsLayoutView::eventFilter( QObject *object, QEvent *event )
+{
+  if ( event->type() == QEvent::MouseButtonRelease )
+  {
+    emit extentChanged();
+  }
+  return QGraphicsView::eventFilter( object, event );
+
+}
+
 QGraphicsLineItem *QgsLayoutView::createSnapLine() const
 {
   std::unique_ptr< QGraphicsLineItem>  item( new QGraphicsLineItem( nullptr ) );

diff --git a/src/gui/layout/qgslayoutview.h b/src/gui/layout/qgslayoutview.h
@@ -295,6 +295,11 @@ class GUI_EXPORT QgsLayoutView: public QGraphicsView
      */
     void setSectionLabel( const QString &label );
 
+    /**
+     * Event filter to handle mouse release on scroll bars
+     */
+    bool eventFilter( QObject *object, QEvent *event ) override;
+
   public slots:
 
     /**