added rudimentary shake effect

panels/timeline.cpp

@@ -329,8 +329,8 @@ void Timeline::delete_selection(bool ripple_delete) {
 	}
 }
 
-int lerp(int a, int b, float t) {
-    return ((1.0f - t) * a) + (t * b);
+int lerp(int a, int b, double t) {
+    return ((1.0 - t) * a) + (t * b);
 }
 
 void Timeline::set_zoom(bool in) {
@@ -343,7 +343,7 @@ void Timeline::set_zoom(bool in) {
                 lerp(
                     ui->timeline_area->horizontalScrollBar()->value(),
                     getScreenPointFromFrame(playhead) - (ui->timeline_area->width()/2),
-                    0.99f
+                    0.99
                 )
             );
     redraw_all_clips(false);
@@ -653,6 +653,7 @@ void Timeline::paste() {
 
             // create copy of clip and offset by playhead
             Clip* cc = c->copy();
+            cc->sequence = sequence;
             cc->timeline_in += playhead;
             cc->timeline_out += playhead;
             cc->track = c->track;

panels/timeline.h

@@ -16,6 +16,8 @@ struct Clip;
 struct Media;
 struct MediaStream;
 
+int lerp(int a, int b, double t);
+
 struct Ghost {
     int clip;
 	long in;

panels/timeline.ui

@@ -346,7 +346,7 @@
      </widget>
     </item>
     <item>
-     <widget class="QScrollArea" name="timeline_area">
+     <widget class="ScrollArea" name="timeline_area">
       <property name="verticalScrollBarPolicy">
        <enum>Qt::ScrollBarAlwaysOn</enum>
       </property>
@@ -459,6 +459,12 @@
    <header>ui/audiomonitor.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ScrollArea</class>
+   <extends>QScrollArea</extends>
+   <header>ui/scrollarea.h</header>
+   <container>1</container>
+  </customwidget>
  </customwidgets>
  <resources>
   <include location="../icons/icons.qrc"/>