prepping for linked clip rewrite

README.md

@@ -0,0 +1,3 @@
+#Olive Video Editor
+
+Olive is a non-linear video editor for Windows, macOS, and Linux. Binaries are not available as of yet, but will be very soon. If you're building from source, you'll need Qt and FFmpeg (recommended versions are Qt 5.5 and FFmpeg 3.4.2).

olive.pro.user

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE QtCreatorProject>
-<!-- Written by QtCreator 4.6.2, 2018-06-24T07:08:29. -->
+<!-- Written by QtCreator 4.6.2, 2018-06-24T11:28:41. -->
 <qtcreator>
  <data>
   <variable>EnvironmentId</variable>

project/sequence.cpp

@@ -41,7 +41,8 @@ void Sequence::delete_clip(int i) {
 
 	// finally remove from vector
     delete clips.at(i);
-	clips.removeAt(i);
+//    clips[i] = NULL;
+    clips.removeAt(i);
 }
 
 long Sequence::getEndFrame() {

ui/timelinewidget.cpp

@@ -252,21 +252,24 @@ void TimelineWidget::mouseReleaseEvent(QMouseEvent *event) {
                 QVector<Selection> delete_areas;
                 for (int i=0;i<panel_timeline->ghosts.size();i++) {
                     const Ghost& g = panel_timeline->ghosts.at(i);
+                    if (g.old_in != g.in || g.old_out != g.out || g.track != g.old_track || g.clip_in != g.old_clip_in) {
+                        Clip* c = g.clip->copy();
 
-                    Clip* c = g.clip->copy();
+                        c->timeline_in = g.in;
+                        c->timeline_out = g.out;
+                        c->track = g.track;
 
-                    c->timeline_in = g.in;
-                    c->timeline_out = g.out;
-                    c->track = g.track;
+                        delete_areas.append({g.in, g.out, g.track});
 
-                    delete_areas.append({g.in, g.out, g.track});
-
-                    copy_clips.append(c);
+                        copy_clips.append(c);
+                    }
                 }
-                panel_timeline->delete_areas_and_relink(delete_areas);
-                for (int i=0;i<copy_clips.size();i++) {
-                    // step 2 - delete anything that exists in area that clip is moving to
-                    sequence->add_clip(copy_clips.at(i));
+                if (copy_clips.size() > 0) {
+                    panel_timeline->delete_areas_and_relink(delete_areas);
+                    for (int i=0;i<copy_clips.size();i++) {
+                        // step 2 - delete anything that exists in area that clip is moving to
+                        sequence->add_clip(copy_clips.at(i));
+                    }
                 }
             } else {
                 // move clips