Lasso Selection Demo

This demo shows how to configure LassoSelectionInputMode for lasso selection mode. In this mode, graph items can be selected by dragging a lasso line around them.

Things to Try

Switch between the selection styles:
- Free-hand lasso selection will create a curved line while dragging and select the items when releasing the mouse button
- Polyline lasso selection will start a segment while dragging and create a bend when releasing the mouse button. The selection is finished when the mouse button is released within the radius around the start point or on double-click.
- Marquee selection is the default selection style in yFiles for HTML. It is used as a reference here.
Adjust the finish radius: When the mouse-button is released at the start point, the selection is finished. The finish radius determines how close to the start point this must happen.
Select different conditions to select nodes:
- Select Intersected Nodes: Nodes will end up in the selection if the lasso contains or at least intersects with their layout.
- Select Complete Nodes: Nodes will only be selected if the lasso completely contains them.
- Select Node's Center: The selection will only contain nodes whose center is inside the lasso line.

Note that on touch devices the selection gesture starts with a long press.