/// <summary>
/// Creates a new tool tip and attaches it to the given control.
/// </summary>
/// <param name="windowManager">The window manager.</param>
/// <param name="masterControl">The control to attach the tool tip to.</param>
public ToolTip(WindowManager windowManager, XNAControl masterControl) : base(windowManager)
{
this.masterControl = masterControl ?? throw new ArgumentNullException("masterControl");
masterControl.MouseEnter += MasterControl_MouseEnter;
masterControl.MouseLeave += MasterControl_MouseLeave;
masterControl.MouseMove += MasterControl_MouseMove;
masterControl.EnabledChanged += MasterControl_EnabledChanged;
InputEnabled = false;
DrawOrder = int.MinValue;
// TODO: adding tool tips as root-level controls might be CPU-intensive.
// instead we could find out the root-level parent and only have the tooltip
// in the window manager's list when the root-level parent is visible.
WindowManager.AddControl(this);
Visible = false;
}