get
fun getSelectionFromDrag(dragX: Float, dragY: Float, centerAngle: Float, itemCount: Int, spreadDegrees: Float = RadialMenuDefaults.ICON_SPREAD_DEGREES, deadZonePx: Float = RadialMenuDefaults.DEAD_ZONE_PX, selectionDeadZoneDeg: Float = RadialMenuDefaults.SELECTION_DEAD_ZONE_DEG): Int?(source)
Determines which item index the user is dragging toward.
The algorithm computes the angle of the drag vector and finds the closest menu item. If the angular distance exceeds selectionDeadZoneDeg, no item is selected.
Return
Index of the selected item, or null if in dead zone or no match.
Parameters
drag
Horizontal drag delta from touch origin in pixels.
drag
Vertical drag delta from touch origin in pixels.
center
The menu's center angle from calculateCenterAngle.
item
Number of items in the menu.
spread
Angular spacing between items.
dead
Minimum drag distance to register.
selection
Maximum angle from nearest item to count as selected.