/// <summary>
/// Handle user input.
/// </summary>
/// <param name="input">The helper for reading input from the user.</param>
public override void HandleInput(InputState input)
{
//The inherited method.
base.HandleInput(input);
//If the component is not active nor visible, stop here.
if (!IsActive || !IsVisible) { return; }
//If the component has focus.
if (HasFocus)
{
//Delete text.
if (input.IsKeyDown(Keys.Delete) && !_UsedKeys.ContainsKey(Keys.Delete)) { DeleteText(true); }
else if (input.IsKeyDown(Keys.Back) && !_UsedKeys.ContainsKey(Keys.Back)) { DeleteText(false); }
//Unfocus the textbox.
else if (input.IsKeyDown(Keys.Enter) && !_UsedKeys.ContainsKey(Keys.Enter)) { FocusChangeInvoke(false); }
//If the marker should be moved.
if (input.IsKeyDown(Keys.Left) && !_UsedKeys.ContainsKey(Keys.Left)) { MoveMarkerLeft(); }
if (input.IsKeyDown(Keys.Right) && !_UsedKeys.ContainsKey(Keys.Right)) { MoveMarkerRight(); }
//If a key has been pressed, write to the textbox.
if (input.IsAnyKeyPress()) { InsertText(input, 0, _MarkerIndex); }
}
}
