Hi all, pls note that the Labtest 05 Package that was distributed has a problem. In the class PolkaDot, if the method is invoked to change the fill setting (true or false), the line that notifies the listeners was missing. Below is the corrected version.
-mb


public void setFilled(boolean isFilled) {
this.isFilled = isFilled;
dataModel.notifyModelHasChanged();
}

-be familiar with workings of MVC as demonstrated in the lt05_pkg

-be able to use classes in the lt05_pkg to implement variants of the basic app, such as

-change way polka dots are drawn.  For instance: 
     -different stroke
     -filled/unfilled

-if user clicks on dot, change its appearance.  For instance:
     -change colour to black
     -increase size by 10%
     -decrease size by 10%
     -toggle between filled and unfilled

-if user clicks on point that does not have a dot already in that position
     -create a polka dot (e.g., with assigned or random colour; random position or upper left anchor position equivalent to the mouse click)
     -conditionally create a polka dot (depending on quadrant)
     -create a polka dot with conditional attributes (e.g., clicks in each of the form quadrants have different appearances)