Relax dependency from procparams.h

rtgui/previewhandler.h

@@ -20,6 +20,7 @@
 #define _PREVIEWHANDLER_
 
 #include <list>
+#include <memory>
 
 #include <gtkmm.h>
 
@@ -54,7 +55,7 @@ private:
 
 protected:
     rtengine::IImage8* image;
-    rtengine::procparams::CropParams cropParams;
+    std::unique_ptr<rtengine::procparams::CropParams> cropParams;
     double previewScale;
     PreviewHandlerIdleHelper* pih;
     std::list<PreviewListener*> listeners;
@@ -82,10 +83,7 @@ public:
     // with this function it is possible to ask for a rough approximation of a (possibly zoomed) crop of the image
     Glib::RefPtr<Gdk::Pixbuf>           getRoughImage (int x, int y, int w, int h, double zoom);
     Glib::RefPtr<Gdk::Pixbuf>           getRoughImage (int desiredW, int desiredH, double& zoom);
-    rtengine::procparams::CropParams    getCropParams ()
-    {
-        return cropParams;
-    }
+    rtengine::procparams::CropParams    getCropParams ();
 };
 
 #endif