How to Automatically Scroll the View During Mouse Drag Gestures

Class AutoDragViewMode is a ViewMode implementation that automatically scrolls the current view when the cursor is moved outside of the view's bounds during a mouse drag gesture. In particular, this covers the following mouse gestures:

• moving selected graph elements
• creating an edge
• resizing nodes
• moving a label to another label position

AutoDragViewMode can be registered alongside any other view mode as shown in the following sample code snippet.

// Get the view instance.
Graph2DView view = getTheCurrentViewOfMyApplication();

// Create the view mode.
AutoDragViewMode advm = new AutoDragViewMode();

// Register it with the view.
view.addViewMode(advm);