HandleManagement

This documentation is for a much older version of cornerstone-tools. While it may still loosely apply, more recent information can be found at https://tools.cornerstonejs.org

Another common scenario is for a tool to support moving or repositioning itself. For example, a user may want to adjust one end of the length measurement by dragging it to a new location. Cornerstone calls these draggable points handles and provides the following helper functions:

• findHandleNear() - Given an array of handles and a pixel point, returns a handle that the pixel point is inside of or undefined if none.
• handleCursorNearHandle() - Given an array of handles and a pixel point, starts moving the handle if the pixel point is inside a handle.
• drawHandles - Given an array of handles, draws them on the screen using a line width of 1 screen pixel.
• activateNearbyHandle - Given an array of handles and a pixel point, activates handles that the pixel point is inside of.