Luna::Window::window_touch_event_handler_t

using window_touch_event_handler_t =  void(IWindow* window, Span<WindowEventTouchPoint> touches, u32 changed_mask)

The handler for touch event.

Parameters

• in touches

  The span that includes all touch points for this event.

• in changed_mask

  A bit-combined mask to identify whether every touch point is changed between multiple touch events. Use (changed_mask & (1 << i)) to test the touch point i, where i is the index of touches.