Nebula Gallery Explained
The Nebula Gallery widget
Gallery is the main widget, which can contain 2 levels of items (GalleryItem). First level ones are called groups and are drawn by the GroupRenderer. Others are items and drawn by the Item Renderer.
The widget draws group one after another, either vertically or horizontally (and never both).
The Gallery widget comes with 4 renderers :
Drag and Drop
The Gallery Widget supports drag and drop and provides a dedicated drag and drop effect. GalleryDragSourceEffect