Ensure auto zoom is enabled when it's the first file

gerbview/files.cpp

@@ -193,7 +193,17 @@ bool GERBVIEW_FRAME::LoadGerberFiles( const wxString& aFullFileName )
     // Set the busy cursor
     wxBusyCursor wait;
 
-    return LoadListOfGerberAndDrillFiles( currentPath, filenamesList );
+    bool isFirstFile = GetImagesList()->GetLoadedImageCount() == 0;
+
+    bool success = LoadListOfGerberAndDrillFiles( currentPath, filenamesList );
+
+    // Auto zoom is only applied if there is only one file loaded
+    if ( isFirstFile )
+    {
+        Zoom_Automatique( false );
+    }
+
+    return success;
 }
 
 

gerbview/gerber_file_image_list.cpp

@@ -70,6 +70,13 @@ GERBER_FILE_IMAGE* GERBER_FILE_IMAGE_LIST::GetGbrImage( int aIdx )
 }
 
 
+unsigned GERBER_FILE_IMAGE_LIST::GetLoadedImageCount()
+{
+    auto notNull = []( GERBER_FILE_IMAGE* image ){ return image != nullptr; };
+    return std::count_if( m_GERBER_List.begin(), m_GERBER_List.end(), notNull );
+}
+
+
 int GERBER_FILE_IMAGE_LIST::AddGbrImage( GERBER_FILE_IMAGE* aGbrImage, int aIdx )
 {
     int idx = aIdx;

gerbview/gerber_file_image_list.h

@@ -121,6 +121,13 @@ public:
      */
     std::unordered_map<int, int> SortImagesByZOrder();
 
+    /**
+     * Get number of loaded images
+     *
+     * @return number of images loaded
+     */
+    unsigned GetLoadedImageCount();
+
 private:
     // the list of loaded images (1 image = 1 gerber file)
     std::vector<GERBER_FILE_IMAGE*> m_GERBER_List;