rudimentary linking/unlinking added

mainwindow.cpp

@@ -615,3 +615,8 @@ void MainWindow::on_actionScroll_Wheel_Zooms_triggered()
 {
     scroll_zooms = !scroll_zooms;
 }
+
+void MainWindow::on_actionLink_Unlink_triggered()
+{
+    panel_timeline->toggle_links();
+}

mainwindow.h

@@ -152,6 +152,8 @@ private slots:
 
     void on_actionScroll_Wheel_Zooms_triggered();
 
+    void on_actionLink_Unlink_triggered();
+
 private:
 	Ui::MainWindow *ui;
 	void setup_layout();

mainwindow.ui

@@ -76,6 +76,7 @@
     <addaction name="separator"/>
     <addaction name="actionSplit_at_Playhead"/>
     <addaction name="actionAdd_Default_Transition"/>
+    <addaction name="actionLink_Unlink"/>
    </widget>
    <widget class="QMenu" name="menuWindow">
     <property name="title">
@@ -612,6 +613,14 @@
     <string>Scroll Wheel Zooms</string>
    </property>
   </action>
+  <action name="actionLink_Unlink">
+   <property name="text">
+    <string>Link/Unlink</string>
+   </property>
+   <property name="shortcut">
+    <string>Ctrl+L</string>
+   </property>
+  </action>
  </widget>
  <layoutdefault spacing="6" margin="11"/>
  <resources>

panels/timeline.cpp

@@ -842,6 +842,23 @@ void Timeline::snap_to_clip(long* l, bool playhead_inclusive) {
     }
 }
 
+void Timeline::toggle_links() {
+    LinkCommand* command = new LinkCommand();
+    for (int i=0;i<sequence->clip_count();i++) {
+        Clip* c = sequence->get_clip(i);
+        command->clips.append(c);
+        if (c->linked.size() > 0) {
+            command->link = false; // prioritize unlinking
+        }
+    }
+    if (command->clips.size() > 0) {
+        undo_stack.push(command);
+        redraw_all_clips(true);
+    } else {
+        delete command;
+    }
+}
+
 void Timeline::increase_track_height() {
     for (int i=0;i<video_track_heights.size();i++) {
         video_track_heights[i] += TRACK_HEIGHT_INCREMENT;

panels/timeline.h

@@ -83,6 +83,7 @@ public:
     void add_transition();
     QVector<int> get_tracks_of_linked_clips(int i);
     bool has_clip_been_split(int c);
+    void toggle_links();
 
     int get_snap_range();
     int getScreenPointFromFrame(long frame);

project/undo.cpp

@@ -310,3 +310,33 @@ void TimelineAction::redo() {
 
     done = true;
 }
+
+LinkCommand::LinkCommand() : link(true) {}
+
+void LinkCommand::undo() {
+    for (int i=0;i<clips.size();i++) {
+        Clip* c = clips.at(i);
+        if (link) {
+            c->linked.clear();
+        } else {
+            c->linked = old_links.at(i);
+        }
+    }
+}
+
+void LinkCommand::redo() {
+    old_links.clear();
+    for (int i=0;i<clips.size();i++) {
+        Clip* c = clips.at(i);
+        if (link) {
+            for (int j=0;j<clips.size();j++) {
+                if (i != j) {
+                    c->linked.append(j);
+                }
+            }
+        } else {
+            old_links.append(c->linked);
+            c->linked.clear();
+        }
+    }
+}

project/undo.h

@@ -59,4 +59,15 @@ private:
     void offset_links(QVector<Clip*>& clips, int offset);
 };
 
+class LinkCommand : public QUndoCommand {
+public:
+    LinkCommand();
+    void undo();
+    void redo();
+    QVector<Clip*> clips;
+    bool link;
+private:
+    QVector< QVector<int> > old_links;
+};
+
 #endif // UNDO_H

ui/scrollarea.cpp

@@ -12,7 +12,7 @@ ScrollArea::ScrollArea(QWidget* parent) : QScrollArea(parent) {}
 void ScrollArea::wheelEvent(QWheelEvent *e) {
     if (scroll_zooms) {
         e->ignore();
-        if (e->angleDelta().y() != 0) panel_timeline->set_zoom(e->angleDelta().y() < 0);
+        if (e->angleDelta().y() != 0) panel_timeline->set_zoom(e->angleDelta().y() > 0);
     } else {
         QScrollArea::wheelEvent(e);
     }

ui/timelinewidget.cpp

@@ -266,6 +266,7 @@ void TimelineWidget::mousePressEvent(QMouseEvent *event) {
                             }
 
                             Selection s;
+
                             s.in = clip->timeline_in;
                             s.out = clip->timeline_out;
                             s.track = clip->track;