Event system

Nodeeditor uses its own events (and tries to avoid using pyqtSignal) to handle logic happening inside the Scene. If a class does handle some events, they are usually described at the top of the page in this documentation.

Any of the events is subscribable to and the methods for registering callback are called:

add<EventName>Listener(callback)

You can register to any of these events any time.

Events used in NodeEditor:

Scene

Has Been Modified

when something has changed in the Scene

Item Selected

when Node or Edge is selected

Items Deselected

when deselect everything appears

Drag Enter

when something is Dragged onto the Scene. Here we do allow or deny the drag

Drop

when we Drop something into the Scene

SceneHistory

History Modified

after History Stamp has been stored or restored

History Stored

after History Stamp has been stored

History Restored

after History Stamp has been restored