TopPart 1Part 2

Part 2

Once you get the basic version working, we would like you to jazz it up a bit. Here are the extensions we would like you to make:
  1. Add labels (Text items) at the bottom of the picture showing the number of correct and incorrect placements. This makes it clearer when the student succeeds in placing the item correctly. They should read something like "correct = nn", "incorrect = mm". The value in the first Text item will be formed by concatenating the string "correct =" with an integer instance variable which keeps track of the number of correct answers. The other is similar.
  2. Users should drag the items to the correct laundry basket rather than just clicking on the basket. Recall from the example in class that you will need an instance variable to label the last mouse position before the drag so you can determine how far to drag the item.
  3. Assign the item a randomly generated color by randomly choosing integers redNum, greenNum, and blueNum between 0 and 255 for each of the red, blue, and green components of the color. You can create a color from those components by writing new Color(redNum,greenNum,blueNum)).

    Now define criteria for determining where each color should go. The simplest criterion is based on the sum of the three color components. If the sum of the component numbers is less than 230, decide it is dark, if it is greater than 600, decide it is white. Otherwise it is colored. After you get the program working you might want to experiment with other criteria.

We will let you figure out most of the details of how to add the features for the more advanced versions. One piece of advice is that for the second enhancement you will be dropping the onMouseClick method in favor of using the three methods:


The image above will be a working version of the simple laundry sorter if your web browser supports Java 1.1. Unfortunately, for now this means that you will not see our demonstration program unless you are running Internet Explorer (at least if you are on a Mac). You should experiment with this demonstration version to make sure you understand exactly what we have in mind.

Grading guidelines

As with last week's lab, your grade will have components based on style and on correctness. Please note that each week we will likely be adding new style guidelines that we will be looking for in your programs.
Grading Point Allocations

Value

Feature
Style, Design, and Efficiency (10 pts total)
2 pts. comments
2 pts. good names.
2 pts. constants.
2 pts. appropriate formatting.
1 pt. generates new objects unnecessarily
1 pts. design issues
Correctness (10 pts)
2 pts. generates a new color swatch only if previous one placed correctly
2 pts. swatch displayed in the correct initial position; returns to original location if incorrectly sorted
2 pts. updates # correct and # incorrect appropriately
2 pts. drags swatch properly (-1 pt if use clicking instead of dragging)
2 pts. appropriate behavior if user does unexpected things like starting to drag outside the laundry item

Final remarks

Be sure to do the basic version of the lab before attempting the more advanced features. Just work on adding one feature at a time, testing each thoroughly before working on the next.

Turning in your program

Your program is due next Monday by noon. I will describe in lab how to turn in your program.

Good luck and have fun!

TopPart 1Part 2