upgrade to qt 6 compliance

app/widget/viewer/viewer.cpp

@@ -82,7 +82,7 @@ ViewerWidget::ViewerWidget(ViewerDisplayWidget *display, QWidget *parent) :
 {
   // Set up main layout
   QVBoxLayout* layout = new QVBoxLayout(this);
-  layout->setMargin(0);
+  layout->setContentsMargins(0, 0, 0, 0);
 
   // Create main OpenGL-based view and sizer
   sizer_ = new ViewerSizer();
@@ -166,6 +166,9 @@ ViewerWidget::~ViewerWidget()
   foreach (ViewerWindow* window, windows) {
     delete window;
   }
+
+  delete display_widget_;
+  display_widget_ = nullptr;
 }
 
 void ViewerWidget::TimeChangedEvent(const rational &time)
@@ -1146,7 +1149,7 @@ RenderTicketPtr ViewerWidget::GetFrame(const rational &t)
     // Frame has been cached, grab the frame
     RenderTicketPtr ticket = std::make_shared<RenderTicket>();
     ticket->setProperty("time", QVariant::fromValue(t));
-    QtConcurrent::run(ViewerWidget::DecodeCachedImage, ticket, GetConnectedNode()->video_frame_cache()->GetCacheDirectory(), GetConnectedNode()->video_frame_cache()->GetUuid(), Timecode::time_to_timestamp(t, timebase(), Timecode::kFloor));
+    QtConcurrent::run(static_cast<void(*)(RenderTicketPtr, const QString &, const QUuid &, const int64_t &)>(ViewerWidget::DecodeCachedImage), ticket, GetConnectedNode()->video_frame_cache()->GetCacheDirectory(), GetConnectedNode()->video_frame_cache()->GetUuid(), Timecode::time_to_timestamp(t, timebase(), Timecode::kFloor));
     return ticket;
   }
 }

app/widget/viewer/viewerdisplay.cpp

@@ -1051,7 +1051,7 @@ void ViewerDisplayWidget::DrawSubtitleTracks()
     f.setFamily(family);
   }
 
-  f.setWeight(OLIVE_CONFIG("DefaultSubtitleWeight").toInt());
+  f.setWeight(static_cast<QFont::Weight>(OLIVE_CONFIG("DefaultSubtitleWeight").toInt()));
 
   bounding_box.adjust(bounding_box.width()/10, bounding_box.height()/10, -bounding_box.width()/10, -bounding_box.height()/10);
 
@@ -1145,7 +1145,7 @@ void ViewerDisplayWidget::ForwardDragEventToTextEdit(T *e)
 bool ViewerDisplayWidget::ForwardMouseEventToTextEdit(QMouseEvent *event, bool check_if_outside)
 {
   // Transform screen mouse coords to world mouse coords
-  QPointF local_pos = GetVirtualPosForTextEdit(event->localPos());
+  QPointF local_pos = GetVirtualPosForTextEdit(event->position());
 
   if (check_if_outside) {
     if (local_pos.x() < 0 || local_pos.x() >= text_edit_->width() || local_pos.y() < 0 || local_pos.y() >= text_edit_->height()) {
@@ -1156,8 +1156,8 @@ bool ViewerDisplayWidget::ForwardMouseEventToTextEdit(QMouseEvent *event, bool c
 
   local_pos = AdjustPosByVAlign(local_pos);
 
-  event->setLocalPos(local_pos);
-  return ForwardEventToTextEdit(event);
+  QMouseEvent derived(event->type(), local_pos, event->scenePosition(), event->globalPosition(), event->button(), event->buttons(), event->modifiers(), event->source(), event->pointingDevice());
+  return ForwardEventToTextEdit(&derived);
 }
 
 bool ViewerDisplayWidget::ForwardEventToTextEdit(QEvent *event)

app/widget/viewer/viewerqueue.h

@@ -21,8 +21,6 @@
 #ifndef VIEWERQUEUE_H
 #define VIEWERQUEUE_H
 
-#include <QLinkedList>
-
 #include "codec/frame.h"
 
 namespace olive {

app/widget/viewer/viewerwindow.cpp

@@ -32,7 +32,7 @@ ViewerWindow::ViewerWindow(QWidget *parent) :
   pixel_aspect_(1)
 {
   QVBoxLayout* layout = new QVBoxLayout(this);
-  layout->setMargin(0);
+  layout->setContentsMargins(0, 0, 0, 0);
   layout->setSpacing(0);
 
   display_widget_ = new ViewerDisplayWidget();