implemented bulk of curve editor's functionality

While certainly not entirely complete yet, this implements most of the UI
functionality of the graph editor.

app/panel/curve/curve.cpp

@@ -10,10 +10,37 @@ CurvePanel::CurvePanel(QWidget *parent) :
   widget_ = new CurveWidget();
   setWidget(widget_);
 
+  connect(widget_, &CurveWidget::TimeChanged, this, &CurvePanel::TimeChanged);
+
   // Set strings
   Retranslate();
 }
 
+void CurvePanel::SetInput(NodeInput *input)
+{
+  widget_->SetInput(input);
+}
+
+void CurvePanel::SetTimebase(const rational &timebase)
+{
+  widget_->SetTimebase(timebase);
+}
+
+void CurvePanel::SetTime(const int64_t &timestamp)
+{
+  widget_->SetTime(timestamp);
+}
+
+void CurvePanel::ZoomIn()
+{
+  widget_->SetScale(widget_->GetScale() * 2);
+}
+
+void CurvePanel::ZoomOut()
+{
+  widget_->SetScale(widget_->GetScale() * 0.5);
+}
+
 void CurvePanel::changeEvent(QEvent *e)
 {
   if (e->type() == QEvent::LanguageChange) {

app/panel/curve/curve.h

@@ -6,9 +6,24 @@
 
 class CurvePanel : public PanelWidget
 {
+  Q_OBJECT
 public:
   CurvePanel(QWidget* parent);
 
+public slots:
+  void SetInput(NodeInput* input);
+
+  void SetTimebase(const rational& timebase);
+
+  void SetTime(const int64_t& timestamp);
+
+  virtual void ZoomIn() override;
+
+  virtual void ZoomOut() override;
+
+signals:
+  void TimeChanged(const int64_t& timestamp);
+
 protected:
   virtual void changeEvent(QEvent* e) override;
 

app/panel/param/param.cpp

@@ -28,6 +28,8 @@ ParamPanel::ParamPanel(QWidget* parent) :
 
   view_ = new NodeParamView(this);
   connect(view_, &NodeParamView::TimeChanged, this, &ParamPanel::TimeChanged);
+  connect(view_, &NodeParamView::SelectedInputChanged, this, &ParamPanel::SelectedInputChanged);
+  connect(view_, &NodeParamView::TimebaseChanged, this, &ParamPanel::TimebaseChanged);
 
   setWidget(view_);
 

app/panel/param/param.h

@@ -42,6 +42,10 @@ public slots:
 signals:
   void TimeChanged(const int64_t& timestamp);
 
+  void SelectedInputChanged(NodeInput* input);
+
+  void TimebaseChanged(const rational& timebase);
+
 protected:
   virtual void changeEvent(QEvent* e) override;