// ------------------------------------------------------------------
/// <summary>
/// Handles the mouse move event
/// </summary>
/// <param name="e">The <see cref=
/// "T:System.Windows.Forms.MouseEventArgs"/> instance containing
/// the event data.</param>
// ------------------------------------------------------------------
public void MouseMove(MouseEventArgs e)
{
if (!IsSuspended && this.Enabled)
{
IHoverListener listener = null;
CollectionBase <IDiagramEntity> paintables =
this.Controller.Model.Paintables;
IDiagramEntity entity;
if (paintables.Count == 0)
{
return;
}
//going from top to the bottom of the z-order
for (int k = paintables.Count - 1; k >= 0; k--)
{
entity = paintables[k];
if (entity.Hit(e.Location)) //we caught an entity
{
//unhover the previous, if any
if (previousHovered != null)
{
previousHovered.Hovered = false;
}
//tell the current one it's being hovered
entity.Hovered = true;
//fetch the hovering service, if defined
listener = entity.GetService(
typeof(IHoverListener)) as IHoverListener;
if (listener != null) //the caught entity does listen
{
if (currentListener == listener) //it's the same as the previous time
{
listener.MouseHover(e);
}
else //we moved from one entity to another listening entity
{
if (currentListener != null) //tell the previous entity we are leaving
{
currentListener.MouseLeave(e);
}
listener.MouseEnter(e); //tell the current one we enter
currentListener = listener;
}
}
else //the caught entity does not listen
{
if (currentListener != null)
{
currentListener.MouseLeave(e);
currentListener = null;
}
}
previousHovered = entity; //remember, for the next time
return; //if another entity is listening underneath this entity it will not receive the notification
}
}
if (currentListener != null)
{
currentListener.MouseLeave(e);
currentListener = null;
}
//unhover the previous, if any
if (previousHovered != null)
{
previousHovered.Hovered = false;
}
}
}
