DisplayEvent class. It adds
information specific to events occuring on PixelCanvases, viz.
a pointer to the PixelCanvas itself.
Example
Motivation
It is desirable to locate in a single place the information which
is common to all events occuring on PixelCanvases.
Thrown Exceptions
To Do
Member Description
Constructor, taking a pointer to a PixelCanvas.
Destructor.
Return a pointer to the PixelCanvas on which the event occurred.
(Required) default constructor.
(Required) copy constructor.
PixelCanvasEvent &operator=(const PixelCanvasEvent &other)
(Required) copy assignment.