bool FDockingDragOperation::CanDockInNode(const TSharedRef<SDockingNode>& DockNode, EViaTabwell IsDockingViaTabwell ) const
{
const TSharedRef<FTabManager> TargetTabManager = DockNode->GetDockArea()->GetTabManager();
const TSharedRef<FTabManager> TabManagerOfOrigin = this->TabOwnerAreaOfOrigin->GetTabManager();
if (TabBeingDragged->GetTabRole() == ETabRole::NomadTab)
{
if ( IsDockingViaTabwell == FDockingDragOperation::DockingViaTabWell )
{
// Nomad tabs can be docked in in any tab well.
return true;
}
else
{
return TargetTabManager != FGlobalTabmanager::Get();
}
}
else if (TabBeingDragged->GetTabRole() == ETabRole::MajorTab)
{
// Major tabs can only be stacked; they should not
// be allowed to split areas. They are also confined to their
// tab manager of origin.
// The only exception is an empty area, where docking the tab should be really easy.
const bool bTabManagerMatches = TargetTabManager == TabManagerOfOrigin;
const bool bCanDockInEmptyArea = DockNode->GetNodeType() == SDockingNode::DockArea && StaticCastSharedRef<SDockingArea>(DockNode)->GetChildNodes().Num() == 0;
return bTabManagerMatches && (IsDockingViaTabwell == FDockingDragOperation::DockingViaTabWell || bCanDockInEmptyArea);
}
else
{
// Most commonly, tabs are confined to their tab manager of origin.
return (TargetTabManager == TabManagerOfOrigin);
}
}
/**
* DragTestArea widgets invoke this method when a drag enters them
*
* @param ThePanel That tab well that we just dragged something into.
*/
void FDockingDragOperation::OnTabWellEntered( const TSharedRef<class SDockingTabWell>& ThePanel )
{
// We just pulled the tab into some TabWell (in some DockNode).
// Hide our decorator window and let the DockNode handle previewing what will happen if we drop the node.
HoveredTabPanelPtr = ThePanel;
CursorDecoratorWindow->HideWindow();
TabBeingDragged->SetDraggedOverDockArea( ThePanel->GetDockArea() );
}
