This sample demonstrates the different values of ToolManager.gestureBehavior.

• ToolManager,GestureZoom is the default value: Pinch gestures will zoom the Diagram（图形缩放）.
• ToolManager,GestureNone: Pinch gestures zoom the browser page instead of the Diagram（整个页面缩放）.
• ToolManager,GestureCancel: Pinch gestures will do nothing（不做任何响应）.

Set the value for the Diagram below:

go.ToolManager.GestureZoom;

go.ToolManager.GestureCancel;

go.ToolManager.GestureNone;