Dropping guides outside of pages doesn't create new guides

python/core/layout/qgslayoutpagecollection.sip

@@ -59,6 +59,13 @@ class QgsLayoutPageCollection : QObject
  :rtype: QgsLayoutItemPage
 %End
 
+    int pageNumber( QgsLayoutItemPage *page ) const;
+%Docstring
+ Returns the page number for the specified ``page``, or -1 if the page
+ is not contained in the collection.
+ :rtype: int
+%End
+
     void addPage( QgsLayoutItemPage *page /Transfer/ );
 %Docstring
  Adds a ``page`` to the collection. Ownership of the ``page`` is transferred

python/gui/layout/qgslayoutruler.sip

@@ -67,6 +67,12 @@ class QgsLayoutRuler: QWidget
  ``position`` is in layout coordinates.
 %End
 
+  signals:
+    void cursorPosChanged( QPointF );
+%Docstring
+Is emitted when mouse cursor coordinates change
+%End
+
   protected:
     virtual void paintEvent( QPaintEvent *event );
 
@@ -77,12 +83,6 @@ class QgsLayoutRuler: QWidget
     virtual void mouseReleaseEvent( QMouseEvent *event );
 
 
-  signals:
-    void cursorPosChanged( QPointF );
-%Docstring
-Is emitted when mouse cursor coordinates change
-%End
-
 };
 
 /************************************************************************

src/core/layout/qgslayoutpagecollection.cpp

@@ -163,6 +163,11 @@ QgsLayoutItemPage *QgsLayoutPageCollection::page( int pageNumber )
   return mPages.value( pageNumber );
 }
 
+int QgsLayoutPageCollection::pageNumber( QgsLayoutItemPage *page ) const
+{
+  return mPages.indexOf( page );
+}
+
 void QgsLayoutPageCollection::addPage( QgsLayoutItemPage *page )
 {
   mPages.append( page );

src/core/layout/qgslayoutpagecollection.h

@@ -73,6 +73,12 @@ class CORE_EXPORT QgsLayoutPageCollection : public QObject
      */
     QgsLayoutItemPage *page( int pageNumber );
 
+    /**
+     * Returns the page number for the specified \a page, or -1 if the page
+     * is not contained in the collection.
+     */
+    int pageNumber( QgsLayoutItemPage *page ) const;
+
     /**
      * Adds a \a page to the collection. Ownership of the \a page is transferred
      * to the collection, and the page will automatically be added to the collection's

src/gui/layout/qgslayoutruler.cpp

@@ -260,6 +260,25 @@ void QgsLayoutRuler::drawMarkerPos( QPainter *painter )
   }
 }
 
+void QgsLayoutRuler::createTemporaryGuideItem()
+{
+  mGuideItem.reset( new QGraphicsLineItem() );
+
+  mGuideItem->setZValue( QgsLayout::ZGuide );
+  QPen linePen( Qt::DashLine );
+  linePen.setColor( Qt::red );
+  linePen.setWidthF( 0 );
+  mGuideItem->setPen( linePen );
+
+  mView->currentLayout()->addItem( mGuideItem.get() );
+}
+
+QPointF QgsLayoutRuler::convertLocalPointToLayout( QPoint localPoint ) const
+{
+  QPoint viewPoint = mView->mapFromGlobal( mapToGlobal( localPoint ) );
+  return  mView->mapToScene( viewPoint );
+}
+
 void QgsLayoutRuler::drawRotatedText( QPainter *painter, QPointF pos, const QString &text )
 {
   painter->save();
@@ -432,9 +451,9 @@ void QgsLayoutRuler::mouseMoveEvent( QMouseEvent *event )
   if ( mCreatingGuide )
   {
     // event -> layout coordinates
+    displayPos = convertLocalPointToLayout( event->pos() );
+
     QgsLayout *layout = mView->currentLayout();
-    QPoint viewPoint  = mView->mapFromGlobal( mapToGlobal( event->pos() ) );
-    displayPos = mView->mapToScene( viewPoint );
     int pageNo = layout->pageCollection()->pageNumberForPoint( displayPos );
     QgsLayoutItemPage *page = layout->pageCollection()->page( pageNo );
 
@@ -484,15 +503,7 @@ void QgsLayoutRuler::mousePressEvent( QMouseEvent *event )
   if ( event->button() == Qt::LeftButton )
   {
     mCreatingGuide = true;
-    mGuideItem.reset( new QGraphicsLineItem() );
-
-    mGuideItem->setZValue( QgsLayout::ZGuide );
-    QPen linePen( Qt::DashLine );
-    linePen.setColor( Qt::red );
-    linePen.setWidthF( 0 );
-    mGuideItem->setPen( linePen );
-
-    mView->currentLayout()->addItem( mGuideItem.get() );
+    createTemporaryGuideItem();
 
     switch ( mOrientation )
     {
@@ -516,12 +527,32 @@ void QgsLayoutRuler::mouseReleaseEvent( QMouseEvent *event )
     QApplication::restoreOverrideCursor();
     mGuideItem.reset();
 
+    // check that cursor left the ruler
+    switch ( mOrientation )
+    {
+      case Qt::Horizontal:
+      {
+        if ( event->pos().y() <= height() )
+          return;
+        break;
+      }
+      case Qt::Vertical:
+      {
+        if ( event->pos().x() <= width() )
+          return;
+        break;
+      }
+    }
+
     QgsLayout *layout = mView->currentLayout();
 
     // create guide
-    QPoint viewPoint  = mView->mapFromGlobal( mapToGlobal( event->pos() ) );
-    QPointF scenePos = mView->mapToScene( viewPoint );
-    int page = layout->pageCollection()->pageNumberForPoint( scenePos );
+    QPointF scenePos = convertLocalPointToLayout( event->pos() );
+    QgsLayoutItemPage *page = layout->pageCollection()->pageAtPoint( scenePos );
+    if ( !page )
+      return; // dragged outside of a page
+
+    int pageNumber = layout->pageCollection()->pageNumber( page );
     std::unique_ptr< QgsLayoutGuide > guide;
     switch ( mOrientation )
     {
@@ -539,7 +570,7 @@ void QgsLayoutRuler::mouseReleaseEvent( QMouseEvent *event )
         break;
       }
     }
-    guide->setPage( page );
+    guide->setPage( pageNumber );
     mView->currentLayout()->guides().addGuide( guide.release() );
   }
 }

src/gui/layout/qgslayoutruler.h

@@ -78,6 +78,10 @@ class GUI_EXPORT QgsLayoutRuler: public QWidget
      */
     void setCursorPosition( QPointF position );
 
+  signals:
+    //! Is emitted when mouse cursor coordinates change
+    void cursorPosChanged( QPointF );
+
   protected:
     void paintEvent( QPaintEvent *event ) override;
     void mouseMoveEvent( QMouseEvent *event ) override;
@@ -129,9 +133,10 @@ class GUI_EXPORT QgsLayoutRuler: public QWidget
     //! Draw current marker pos on ruler
     void drawMarkerPos( QPainter *painter );
 
-  signals:
-    //! Is emitted when mouse cursor coordinates change
-    void cursorPosChanged( QPointF );
+    void createTemporaryGuideItem();
+
+    QPointF convertLocalPointToLayout( QPoint localPoint ) const;
+
 
 };
 

tests/src/python/test_qgslayoutpagecollection.py

@@ -76,6 +76,8 @@ class TestQgsLayoutPageCollection(unittest.TestCase):
         # add a page
         page = QgsLayoutItemPage(l)
         page.setPageSize('A4')
+        self.assertEqual(collection.pageNumber(page), -1)
+
         collection.addPage(page)
 
         self.assertTrue(page in l.items())
@@ -85,6 +87,7 @@ class TestQgsLayoutPageCollection(unittest.TestCase):
         self.assertFalse(collection.page(-1))
         self.assertEqual(collection.page(0), page)
         self.assertFalse(collection.page(1))
+        self.assertEqual(collection.pageNumber(page), 0)
 
         # add a second page
         page2 = QgsLayoutItemPage(l)
@@ -96,6 +99,7 @@ class TestQgsLayoutPageCollection(unittest.TestCase):
         self.assertFalse(collection.page(-1))
         self.assertEqual(collection.page(0), page)
         self.assertEqual(collection.page(1), page2)
+        self.assertEqual(collection.pageNumber(page2), 1)
 
         # insert a page
         page3 = QgsLayoutItemPage(l)
@@ -108,6 +112,7 @@ class TestQgsLayoutPageCollection(unittest.TestCase):
         self.assertEqual(collection.page(0), page)
         self.assertEqual(collection.page(1), page3)
         self.assertEqual(collection.page(2), page2)
+        self.assertEqual(collection.pageNumber(page3), 1)
 
         # delete page
         collection.deletePage(-1)