Method OnViewportMessage

src/ProjectWindow.cpp:1294–1318

}

void ProjectWindow::OnViewportMessage(const ViewportMessage &message)
{
   // Activate events can fire during window teardown, so just
   // ignore them.
   if (mIsDeleting)
      return;
   auto pProject = FindProject();
   if (!pProject)
      return;
   auto &project = *pProject;
   auto &viewInfo = ViewInfo::Get(project);
   auto &trackPanel = GetProjectPanel(project);

   auto [rescroll, scrollbarVisibilityChanged, resize] = message;

   if (rescroll)
      trackPanel.Refresh(false);

   // why?  Is there a menu item whose availability depends on scroll position
   // or zoom level?
   CommandManager::Get(project).UpdateMenus();

   if (scrollbarVisibilityChanged || resize)
      UpdateLayout();
}

static ToolManager::TopPanelHook::Scope scope {
[]( wxWindow &window ){