toggle for moving locked panels implemented

app/panel/panelmanager.cpp

@@ -20,10 +20,11 @@
 
 #include "panelmanager.h"
 
-PanelManager* olive::panel_focus_manager = nullptr;
+PanelManager* olive::panel_manager = nullptr;
 
 PanelManager::PanelManager(QObject *parent) :
-  QObject(parent)
+  QObject(parent),
+  locked_(false)
 {
 }
 
@@ -44,6 +45,11 @@ PanelWidget *PanelManager::CurrentlyFocused() const
   return focus_history_.first();
 }
 
+bool PanelManager::ArePanelsLocked()
+{
+  return locked_;
+}
+
 void PanelManager::FocusChanged(QWidget *old, QWidget *now)
 {
   Q_UNUSED(old)
@@ -83,3 +89,12 @@ void PanelManager::FocusChanged(QWidget *old, QWidget *now)
     parent = parent->parent();
   }
 }
+
+void PanelManager::SetPanelsLocked(bool locked)
+{
+  foreach (PanelWidget* panel, focus_history_) {
+    panel->SetMovementLocked(locked);
+  }
+
+  locked_ = locked;
+}