fixed gcc compile issues

app/widget/curvewidget/curveview.cpp

@@ -194,6 +194,8 @@ void CurveView::ScaleChangedEvent(double scale)
 
 void CurveView::VerticalScaleChangedEvent(double scale)
 {
+  Q_UNUSED(scale)
+
   QMap<NodeKeyframe*, KeyframeViewItem*>::const_iterator iterator;
 
   for (iterator=item_map().begin();iterator!=item_map().end();iterator++) {

app/widget/keyframeview/keyframeviewbase.cpp

@@ -197,7 +197,7 @@ void KeyframeViewBase::ScaleChangedEvent(double scale)
   }
 }
 
-void KeyframeViewBase::VerticalScaleChangedEvent(double scale)
+void KeyframeViewBase::VerticalScaleChangedEvent(double)
 {
 }
 
@@ -300,9 +300,9 @@ void KeyframeViewBase::ShowContextMenu()
 
   MenuShared::instance()->AddItemsForEditMenu(&m);
 
-  QAction* linear_key_action;
-  QAction* bezier_key_action;
-  QAction* hold_key_action;
+  QAction* linear_key_action = nullptr;
+  QAction* bezier_key_action = nullptr;
+  QAction* hold_key_action = nullptr;
 
   QList<QGraphicsItem*> items = scene()->selectedItems();
   if (!items.isEmpty()) {

app/widget/nodeparamview/nodeparamview.cpp

@@ -228,5 +228,7 @@ void NodeParamView::ItemRequestedTimeChanged(const rational &time)
 
 void NodeParamView::ForceKeyframeViewToScroll(int min, int max)
 {
+  Q_UNUSED(min)
+
   bottom_item_->setY(keyframe_view_->viewport()->height() + max);
 }

app/widget/slider/integerslider.cpp

@@ -33,17 +33,17 @@ int IntegerSlider::GetValue()
 
 void IntegerSlider::SetValue(const int64_t &v)
 {
-  SliderBase::SetValue(v);
+  SliderBase::SetValue(QVariant::fromValue(v));
 }
 
 void IntegerSlider::SetMinimum(const int64_t &d)
 {
-  SetMinimumInternal(d);
+  SetMinimumInternal(QVariant::fromValue(d));
 }
 
 void IntegerSlider::SetMaximum(const int64_t &d)
 {
-  SetMaximumInternal(d);
+  SetMaximumInternal(QVariant::fromValue(d));
 }
 
 QVariant IntegerSlider::StringToValue(const QString &s, bool *ok)

app/widget/slider/timeslider.cpp

@@ -30,5 +30,5 @@ QString TimeSlider::ValueToString(const QVariant &v)
 
 QVariant TimeSlider::StringToValue(const QString &s, bool *ok)
 {
-  return Timecode::timecode_to_timestamp(s, timebase_, Timecode::CurrentDisplay(), ok);
+  return QVariant::fromValue(Timecode::timecode_to_timestamp(s, timebase_, Timecode::CurrentDisplay(), ok));
 }

app/widget/timelinewidget/tool/edit.cpp

@@ -7,15 +7,15 @@ TimelineWidget::EditTool::EditTool(TimelineWidget* parent) :
 
 void TimelineWidget::EditTool::MousePress(TimelineViewMouseEvent *event)
 {
-
+  Q_UNUSED(event)
 }
 
 void TimelineWidget::EditTool::MouseMove(TimelineViewMouseEvent *event)
 {
-
+  Q_UNUSED(event)
 }
 
 void TimelineWidget::EditTool::MouseRelease(TimelineViewMouseEvent *event)
 {
-
+  Q_UNUSED(event)
 }

app/widget/timelinewidget/tool/zoom.cpp

@@ -32,6 +32,8 @@ void TimelineWidget::ZoomTool::MousePress(TimelineViewMouseEvent *event)
 
 void TimelineWidget::ZoomTool::MouseMove(TimelineViewMouseEvent *event)
 {
+  Q_UNUSED(event)
+
   if (dragging_) {
     parent()->MoveRubberBandSelect(false, false);
   } else {

app/widget/timelinewidget/view/timelineviewbase.cpp

@@ -139,7 +139,7 @@ bool TimelineViewBase::PlayheadMove(QMouseEvent *event)
   return true;
 }
 
-bool TimelineViewBase::PlayheadRelease(QMouseEvent *event)
+bool TimelineViewBase::PlayheadRelease(QMouseEvent*)
 {
   if (dragging_playhead_) {
     dragging_playhead_ = false;
@@ -210,7 +210,7 @@ bool TimelineViewBase::HandRelease(QMouseEvent *event)
   return false;
 }
 
-void TimelineViewBase::ToolChangedEvent(Tool::Item tool)
+void TimelineViewBase::ToolChangedEvent(Tool::Item)
 {
 }
 
@@ -326,7 +326,7 @@ bool TimelineViewBase::WheelEventIsAZoomEvent(QWheelEvent *event)
   return (static_cast<bool>(event->modifiers() & Qt::ControlModifier) == !Config::Current()["ScrollZooms"].toBool());
 }
 
-void TimelineViewBase::SetLimitYAxis(bool e)
+void TimelineViewBase::SetLimitYAxis(bool)
 {
   limit_y_axis_ = true;
   UpdateSceneRect();

app/widget/timeruler/timeruler.cpp

@@ -143,7 +143,7 @@ void TimeRuler::paintEvent(QPaintEvent *)
   double width_of_day = width_of_hour * 24;
 
   double long_interval, short_interval;
-  int long_rate;
+  int long_rate = 0;
 
   // Used for comparison, even if one unit can technically fit, we have to fit at least two for it to matter
   int doubled_gap = minimum_gap_between_lines_ * 2;
@@ -252,7 +252,7 @@ void TimeRuler::paintEvent(QPaintEvent *)
 
           if (timecode_left > last_text_draw) {
             p.drawText(text_rect,
-                       text_align,
+                       static_cast<int>(text_align),
                        timecode_str);
 
             last_text_draw = timecode_left + timecode_width;