fixed up validationn issues with transition tool

playback/playback.cpp

@@ -194,7 +194,7 @@ void get_clip_frame(Clip* c, long playhead) {
 #ifdef GCF_DEBUG
 							dout << "GCF ==> RESET" << target_pts << "(" << target_frame->pts << "-" << target_frame->pts+target_frame->pkt_duration << ")";
 #endif
-//							target_frame = NULL;
+//                            target_frame = NULL;
 							reset = true;
                             c->last_invalid_ts = target_pts;
 						} else {

project/sequence.cpp

@@ -57,6 +57,7 @@ long Sequence::getEndFrame() {
 void Sequence::hard_delete_transition(Clip *c, int type) {
     int transition_index = (type == TA_OPENING_TRANSITION) ? c->opening_transition : c->closing_transition;
     if (transition_index > -1) {
+        bool del = true;
         for (int i=0;i<clips.size();i++) {
             Clip* cc = clips.at(i);
             if (cc != NULL
@@ -64,12 +65,16 @@ void Sequence::hard_delete_transition(Clip *c, int type) {
                     && (cc->opening_transition == transition_index
                         || cc->closing_transition == transition_index)) {
                 // another clip is using this, don't delete just yet
-                return;
+                del = false;
+                break;
             }
         }
 
-        delete transitions.at(transition_index);
-        transitions[transition_index] = NULL;
+        if (del) {
+            delete transitions.at(transition_index);
+            transitions[transition_index] = NULL;
+        }
+
         if (type == TA_OPENING_TRANSITION) {
             c->opening_transition = -1;
         } else {

ui/timelinewidget.cpp

@@ -1310,6 +1310,13 @@ void TimelineWidget::update_ghosts(const QPoint& mouse_pos, bool lock_frame) {
 				}
 			}
         } else if (panel_timeline->tool == TIMELINE_TOOL_TRANSITION) {
+            bool flipped = false;
+
+            if (frame_diff < 0) {
+                frame_diff = -frame_diff;
+                flipped = true;
+            }
+
             Clip* otc = c; // open transition clip
             Clip* ctc = (panel_timeline->transition_tool_post_clip > -1) ? sequence->clips.at(panel_timeline->transition_tool_post_clip) : NULL; // close transition clip
 
@@ -1327,6 +1334,7 @@ void TimelineWidget::update_ghosts(const QPoint& mouse_pos, bool lock_frame) {
                 }
 
                 validator = otc->clip_in - frame_diff;
+                dout << "validator" << validator;
                 if (validator < 0) { // prevent from going below 0 for the media
                     frame_diff += validator;
                 }
@@ -1351,6 +1359,10 @@ void TimelineWidget::update_ghosts(const QPoint& mouse_pos, bool lock_frame) {
                     frame_diff -= validator;
                 }
             }
+
+            if (flipped) {
+                frame_diff = -frame_diff;
+            }
         }
     }
     if (temp_frame_diff != frame_diff) panel_timeline->snapped = false;