preview generator updates the appropriate ui when done

io/previewgenerator.cpp

@@ -197,6 +197,10 @@ void PreviewGenerator::finalize_media() {
     } else {
       olive::media_icon_service->SetMediaIcon(media, ICON_TYPE_VIDEO);
     }
+
+    if (olive::ActiveSequence != nullptr) {
+      olive::ActiveSequence->RefreshClips(media);
+    }
   }
 }
 

panels/project.cpp

@@ -221,6 +221,9 @@ Project::Project(QWidget *parent) :
   connect(directory_up, SIGNAL(clicked(bool)), this, SLOT(go_up_dir()));
   connect(icon_view, SIGNAL(changed_root()), this, SLOT(set_up_dir_enabled()));
 
+  connect(olive::media_icon_service.get(), SIGNAL(IconChanged()), icon_view->viewport(), SLOT(update()));
+  connect(olive::media_icon_service.get(), SIGNAL(IconChanged()), tree_view->viewport(), SLOT(update()));
+
   update_view_type();
 
   Retranslate();

project/sequence.cpp

@@ -64,7 +64,18 @@ long Sequence::getEndFrame() {
 			end = c->timeline_out;
 		}
 	}
-	return end;
+  return end;
+}
+
+void Sequence::RefreshClips(Media *m) {
+  for (int i=0;i<clips.size();i++) {
+    ClipPtr c = clips.at(i);
+
+    if (c != nullptr
+        && (m == nullptr || c->media == m)) {
+      c->refresh();
+    }
+  }
 }
 
 void Sequence::getTrackLimits(int* video_tracks, int* audio_tracks) {

project/sequence.h

@@ -42,6 +42,8 @@ public:
 	int audio_frequency;
 	int audio_layout;
 
+  void RefreshClips(Media* m = nullptr);
+
 	QVector<Selection> selections;
 	long playhead;