#TTP 334976 - BLUEPRINTS: Drag-dropping can still create nodes in read-only graphs (e.g., during PIE or when viewing an anim parent graph)
#Branch UE4
#Proj GraphEditor
#Add added SGraphPanel::IsGraphEditable so nodes and objects placed in the graph can easily determine if the graph is read only.
#Change Modified SGraphPanel::OnDragLeave to restore the tooltip if a FDecoratedDragDropOp has been modified to indicate that the graph is read only.
#Change Modified SGraphPanel::OnDragOver to change the icon on the tooltip to a lined circle if the graph is read only.
#Change Modified SGraphPanel::OnDrop to exit without changes if the graph is read only.
#Change Modified FGraphEditorDragDropAction to present feedback to the user if the drag drop target is invalid. this is activated by setting FGraphEditorDragDropAction::SetDropTargetValid, this just collpases the active icon and displays a lined circle with the same tooltip when set to false.
#Add added SGraphNode::IsNodeEditable to determine if the node is currently editable, based on an evaluation of the IsEditable attribute and the parent graphs IsGraphEditable.
#Change modified SGraphNode::OnDragOver to display a lined circle if the parent graph or the node is read only.
#Change modified SGraphNode::OnDrop to exit without changes if the parent graph or the node is read only.
#Change modified SGraphPin::OnDrop to exit without changes if the parent graph or the owner node is read only.
ReviewedBy Chris.Wood, Nick.Whiting
[CL 2109030 by Ben Cosh in Main branch]
Settings specific to Anim, Blueprint and Material Editor should probably be broken out into their own settings classes in the respective modules at some point. It feels a little strange that the GraphEditor needs to be aware of specific pin and node title types. At this time I did not want to refactor the existing graph editors though, and since many of the properties are currently being shared, pulling these settings out of UEditorUserSettings is at least a good first step. In the future I would like to see settings sections for specific graph based editors instead of having a generic 'Graph Editor' section that is shared by some or all editors.
I exposed various color settings in the UI as many users seem to be quite excited about customizing their Editor. If you think that some settings should be added or removed, please feel free to make any desired changes or let me know. Thanks!
#CodeReview: nick.whiting
[CL 2079703 by Max Preussner in Main branch]
- Clean up FDragConnection construction and add a factory function in SGraphPin to extend it for some pins
- Clean up arguments to FOnGetContextMenuFor in SGraphPanel
- Various modifications to SGraphPin to permit implementation of wire knots/reroute nodes
#codereview nick.whiting
[CL 2074801 by Michael Noland in Main branch]
#summary Replaced instances of DragDrop::IsTypeMatch with FDragDropEvent::GetOperationAs()
#note Please change any instances of DragDrop::IsTypeMatch for the templated FDragDropEvent::GetOperationAs<>() or FDragDropOperation::IsOfType<>() where necessary
#proj Editor
#branch UE4
#reviewedby Nick.Atamas
[CL 2042222 by Andrew Rodham in Main branch]
