sbox-public/engine/Sandbox.Engine/Systems/UI/Panel/Event/DragEvent.cs

namespace Sandbox.UI;

public class DragEvent : PanelEvent
{
	/// <summary>
	/// For ondrag event - the delta of the mouse movement
	/// </summary>
	public Vector2 MouseDelta;

	/// <summary>
	/// The position on the Target panel where the drag started
	/// </summary>
	public Vector2 LocalGrabPosition;

	/// <summary>
	/// The position relative to the screen where the drag started
	/// </summary>
	public Vector2 ScreenGrabPosition;

	/// <summary>
	/// The current mouse position relative to target
	/// </summary>
	public Vector2 LocalPosition;

	/// <summary>
	/// The current position relative to the screen
	/// </summary>
	public Vector2 ScreenPosition;

	public DragEvent( string event_name, Panel active, Vector2 localDragStart, Vector2 globalDragStart ) : base( event_name, active )
	{
		Name = event_name;
		Target = active;

		LocalGrabPosition = localDragStart;
		ScreenGrabPosition = globalDragStart;

		LocalPosition = Target.MousePosition + Target.ScrollOffset;
		ScreenPosition = Mouse.Position;

	}
}