// This is the method defined for the MoveLeft event. Mark this event as private
// if you will never override it. Otherwise mark it as protected virtual.
/// <summary>
/// Raises the <see cref="MoveLeft"/> event.
/// </summary>
protected virtual void OnMoveLeft(MovedLeftEventArgs e)
{
// Check to see if the event is handled anywhere (in simple terms).
// This is where you send data to event handlers.
// Send the object related to the event as first argument (in my case this control).
// Send in e which is the event args passed in from onMouseMove with the moveAmountData.
MoveLeft?.Invoke(this, e);
}
// Use the Move event in conjunction with our own.
protected override void OnMove(EventArgs e)
{
base.OnMove(e);
// If this control has moved left.
if (lastXPos > Location.X)
{
int moveAmount = lastXPos - Location.X;
// Construct event args which are defined below.
MovedLeftEventArgs eventArgs = new MovedLeftEventArgs(moveAmount);
// Raise event and pass in our event args.
// Event args will be available to any object that has
// registered to the MoveLeft event.
OnMoveLeft(eventArgs);
}
// When were done calculating, save the last x position to contrast
// with the current position the next time the mouse move event is raised.
lastXPos = Location.X;
}
private void specialControl_MoveLeft(object sender, MovedLeftEventArgs e)
{
// Add amount moved to total before displaying
moveLeftAmount += e.MoveAmount;
Text = moveLeftAmount.ToString();
}
