fixed issue with undo overhaul

project/undo.cpp

@@ -81,13 +81,36 @@ DeleteClipAction::~DeleteClipAction() {
 }
 
 void DeleteClipAction::undo() {
+	// restore ref to clip
     seq->clips[index] = ref;
     ref = NULL;
+
+	// restore links to this clip
+	for (int i=linkClipIndex.size()-1;i>=0;i--) {
+		seq->clips.at(linkClipIndex.at(i))->linked.insert(linkLinkIndex.at(i), index);
+	}
 }
 
 void DeleteClipAction::redo() {
+	// remove ref to clip
     ref = seq->clips.at(index);
     seq->clips[index] = NULL;
+
+	// delete link to this clip
+	linkClipIndex.clear();
+	linkLinkIndex.clear();
+	for (int i=0;i<seq->clips.size();i++) {
+		Clip* c = seq->clips.at(i);
+		if (c != NULL) {
+			for (int j=0;j<c->linked.size();j++) {
+				if (c->linked.at(j) == index) {
+					linkClipIndex.append(i);
+					linkLinkIndex.append(j);
+					c->linked.removeAt(j);
+				}
+			}
+		}
+	}
 }
 
 ChangeSequenceAction::ChangeSequenceAction(Sequence* s) :

project/undo.h

@@ -62,6 +62,9 @@ private:
     Sequence* seq;
     Clip* ref;
     int index;
+
+	QVector<int> linkClipIndex;
+	QVector<int> linkLinkIndex;
 };
 
 class ChangeSequenceAction : public QUndoCommand {

ui/keyframeview.cpp

@@ -33,8 +33,6 @@ void KeyframeView::paintEvent(QPaintEvent*) {
 	rowY.clear();
 	rows.clear();
 
-
-
 	if (panel_effect_controls->selected_clips.size() > 0) {
 		long effects_in = LONG_MAX;
 		long effects_out = 0;