Node Selection Resizing

This demo shows how to implement resizing handles for a selection of nodes. When multiple nodes are selected, dragging the reshape handles will resize the selection as a whole. This demo supports two modes:

• Resize Nodes: Scales the selected items uniformly by scaling both the locations and the node sizes.
• Scale Locations: Scales the item locations while preserving node sizes.

Things to Try

• Select a single item to get the default move and resize behavior.
• Select multiple nodes and drag the handles to resize the selection.
• Hold down the Shift key while resizing to preserve the aspect ratio. Hold down the Ctrl key to resize around the center. You can do both at the same time.
• Switch between the two resize modes in the toolbar to see their effect.
• Turn on orthogonal edge editing in the toolbar to see how it affects bend movement.
• Turn on snapping in the toolbar to let the selected nodes snap to other items in the graph.
• Make the selection rectangle very small or very large to see how resizing respects size constraints.

This feature is implemented as custom IInputMode that can be added to a GraphEditorInputMode.