keyframes: implemented deleting keyframes with the delete shortcut

app/widget/curvewidget/curvewidget.cpp

@@ -168,6 +168,11 @@ void CurveWidget::SetVerticalScale(const double &vscale)
   view_->SetYScale(vscale);
 }
 
+void CurveWidget::DeleteSelected()
+{
+  view_->DeleteSelected();
+}
+
 void CurveWidget::changeEvent(QEvent *e)
 {
   if (e->type() == QEvent::LanguageChange) {

app/widget/curvewidget/curvewidget.h

@@ -47,6 +47,8 @@ public:
   const double& GetVerticalScale();
   void SetVerticalScale(const double& vscale);
 
+  void DeleteSelected();
+
 protected:
   virtual void changeEvent(QEvent *) override;
 

app/widget/keyframeview/keyframeviewbase.cpp

@@ -73,6 +73,25 @@ void KeyframeViewBase::SetYScale(const double &y_scale)
   }
 }
 
+void KeyframeViewBase::DeleteSelected()
+{
+  QUndoCommand* command = new QUndoCommand();
+
+  QMap<NodeKeyframe*, KeyframeViewItem*>::const_iterator i;
+
+  for (i=item_map_.constBegin(); i!=item_map_.constEnd(); i++) {
+    if (i.value()->isSelected()) {
+      NodeInput* input_parent = i.key()->parent();
+
+      new NodeParamRemoveKeyframeCommand(input_parent,
+                                         input_parent->get_keyframe_shared_ptr_from_raw(i.key()),
+                                         command);
+    }
+  }
+
+  Core::instance()->undo_stack()->pushIfHasChildren(command);
+}
+
 void KeyframeViewBase::RemoveKeyframe(NodeKeyframePtr key)
 {
   KeyframeAboutToBeRemoved(key.get());

app/widget/keyframeview/keyframeviewbase.h

@@ -40,6 +40,8 @@ public:
   const double& GetYScale() const;
   void SetYScale(const double& y_scale);
 
+  void DeleteSelected();
+
 public slots:
   void RemoveKeyframe(NodeKeyframePtr key);
 

app/widget/nodeparamview/nodeparamview.cpp

@@ -225,6 +225,11 @@ Node *NodeParamView::GetTimeTarget() const
   return keyframe_view_->GetTimeTarget();
 }
 
+void NodeParamView::DeleteSelected()
+{
+  keyframe_view_->DeleteSelected();
+}
+
 void NodeParamView::UpdateItemTime(const int64_t &timestamp)
 {
   rational time = Timecode::timestamp_to_time(timestamp, keyframe_view_->timebase());

app/widget/nodeparamview/nodeparamview.h

@@ -42,6 +42,8 @@ public:
 
   Node* GetTimeTarget() const;
 
+  void DeleteSelected();
+
 signals:
   void InputDoubleClicked(NodeInput* input);