Fix reparsing background image items.

src/app/valentina/mainwindow.cpp

@@ -2398,9 +2398,24 @@ void MainWindow::NewBackgroundImageItem(const VBackgroundPatternImage &image)
             m_backgroundImages.insert(image.Id(), item);
         }
         m_deletedBackgroundImageItems.remove(image.Id());
+        m_deletedBackgroundImages.remove(image.Id());
     }
     else
     {
+        VBackgroundImageItem *item = InitBackgroundImageItem(image);
+        if (item != nullptr)
+        {
+            m_backgroundImages.insert(image.Id(), item);
+            sceneDraw->addItem(item);
+        }
+    }
+
+    VMainGraphicsView::NewSceneRect(sceneDraw, ui->view);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+auto MainWindow::InitBackgroundImageItem(const VBackgroundPatternImage &image) -> VBackgroundImageItem *
+{
     VBackgroundImageItem *item = nullptr;
     if (image.Type() == PatternImage::Raster)
     {
@@ -2425,12 +2440,9 @@ void MainWindow::NewBackgroundImageItem(const VBackgroundPatternImage &image)
                 &VWidgetBackgroundImages::ImageSelected);
         connect(backgroundImagesWidget, &VWidgetBackgroundImages::SelectImage, m_backgroudcontrols,
                 &VBackgroundImageControls::ActivateControls);
-            sceneDraw->addItem(item);
-            m_backgroundImages.insert(image.Id(), item);
-        }
     }
 
-    VMainGraphicsView::NewSceneRect(sceneDraw, ui->view);
+    return item;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -3821,6 +3833,7 @@ void MainWindow::FullParseFile()
 
         SetEnabledGUI(true);
         doc->Parse(Document::FullParse);
+        ParseBackgroundImages();
 
         if (VAbstractValApplication::VApp()->getOpeningPattern())
         {
@@ -4358,6 +4371,7 @@ void MainWindow::DeleteBackgroundImageItem(const QUuid &id)
         }
         m_backgroundImages.remove(id);
         m_deletedBackgroundImageItems.insert(id, item);
+        m_deletedBackgroundImages.insert(id, item->Image());
 
         if (backgroundImagesWidget != nullptr)
         {
@@ -4425,6 +4439,39 @@ void MainWindow::SaveBackgroundImage(const QUuid &id)
     }
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void MainWindow::ParseBackgroundImages()
+{
+    // No memory leak. Scene should take care of these items
+    m_backgroudcontrols = nullptr; // force creating new controls
+    m_backgroundImages.clear(); // clear dangling pointers
+
+    QVector<VBackgroundPatternImage> allImages = doc->GetBackgroundImages();
+    for (const auto &image : allImages)
+    {
+        NewBackgroundImageItem(image);
+    }
+    backgroundImagesWidget->UpdateImages();
+
+    // Undostack rely on m_deletedBackgroundImageItems to prevent crashes
+    QMap<QUuid, VBackgroundImageItem *> deletedBackgroundImageItems;
+    QMap<QUuid, VBackgroundImageItem *>::const_iterator i;
+    for (i = m_deletedBackgroundImageItems.constBegin(); i != m_deletedBackgroundImageItems.constEnd(); ++i)
+    {
+        if (m_deletedBackgroundImages.contains(i.key()))
+        {
+            VBackgroundPatternImage image = m_deletedBackgroundImages.value(i.key());
+            VBackgroundImageItem *item = InitBackgroundImageItem(image);
+            if (item != nullptr)
+            {
+                deletedBackgroundImageItems.insert(image.Id(), item);
+            }
+        }
+    }
+
+    m_deletedBackgroundImageItems = deletedBackgroundImageItems;
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 void MainWindow::InitDimensionControls()
 {
@@ -5838,16 +5885,7 @@ bool MainWindow::LoadPattern(QString fileName, const QString& customMeasureFile)
             /* Collect garbage only after successfully parse. This way wrongly accused items have one more time to restore
              * a reference. */
             QTimer::singleShot(100, Qt::CoarseTimer, this, [this](){doc->GarbageCollector(true);});
-
+            QTimer::singleShot(500, Qt::CoarseTimer, this, &MainWindow::ParseBackgroundImages);
-            QTimer::singleShot(500, Qt::CoarseTimer, this, [this]()
-            {
-                QVector<VBackgroundPatternImage> allImages = doc->GetBackgroundImages();
-                for (const auto &image : allImages)
-                {
-                    NewBackgroundImageItem(image);
-                }
-                backgroundImagesWidget->UpdateImages();
-            });
         }
 
         patternReadOnly = doc->IsReadOnly();

src/app/valentina/mainwindow.h

@@ -241,6 +241,8 @@ private slots:
     void ShowBackgroundImageInExplorer(const QUuid &id);
     void SaveBackgroundImage(const QUuid &id);
 
+    void ParseBackgroundImages();
+
 private:
     Q_DISABLE_COPY(MainWindow)
     /** @brief ui keeps information about user interface */
@@ -323,7 +325,8 @@ private:
 
     QMap<QUuid, VBackgroundImageItem *> m_backgroundImages{};
     QMap<QUuid, VBackgroundImageItem *> m_deletedBackgroundImageItems{};
-    VBackgroundImageControls *m_backgroudcontrols{nullptr};
+    VBackgroundImageControls* m_backgroudcontrols{nullptr};
+    QMap<QUuid, VBackgroundPatternImage> m_deletedBackgroundImages{};
 
     bool m_groupsActive{false};
     bool m_toolOptionsActive{false};
@@ -446,6 +449,7 @@ private:
     void ExportDraw(const QString &fileName);
 
     void NewBackgroundImageItem(const VBackgroundPatternImage &image);
+    auto InitBackgroundImageItem(const VBackgroundPatternImage &image) -> VBackgroundImageItem *;
 };
 
 #endif // MAINWINDOW_H