The provided skeleton code has the necessary event handling structures in
place; you'll just need to fill in the code inside the event-handling setup.
Do not concern yourself with the event-handling mechanism; just fill in the
requested code.
Draw a picture! While looking at the expected output, draw pictures that
represent what your screen should look like.
Annotate your picture with the expansion behavior. Define how you think the
GUI should expand and contract when the window size changes.
Starting with the skeleton code provided,
define the three selection buttons at the top of the GUI and a
CardLayout-managed panel for the center section. Create
three labels, one for each sub-GUI, just listing the name of the sub GUI.
Try adding these labels as the components of the CardLayout.
Lastly, add a call to create the window in the main() routine.
For these selection buttons, use the buttons already defined and created
in the skeleton. They are predefined so the included event handlers have
something to attach to.
You are doing this to get your initial CardLayout panel working
properly, although the code to make the CardLayout panel swap
cards is not present yet.
When finished, compile and test your code to see if it looks right
Fill in the CardLayout-switching code in the selection button
event handlers. This will set up the actions to swap cards.
When finished, compile and test your code to see if the buttons switch labels.
Define the menus and menu items. Do not worry about enabling and disabling
them yet.
At this point, just compile and check to see that they appear properly.
Set the enable/disable behavior of the menu items. Initially, the
Open, Save and Save As items should be disabled,
as they do not apply to the calculator sub-GUI. All others should be enabled.
Add code to the event handlers that switch between sub-GUIs to enable and
disable those three options as necessary.
Compile and test your program.
Replace the NotePad label with a TextArea. That's really all
that sub-GUI is.
Compile and test your program.
Define the To-Do List GUI.
This GUI should contain a List, a TextField and
two Button components. Don't worry about event handing—the
buttons won't do anything.
Replace the To-Do List label with this new sub-GUI.
Compile and test your program.
Define the Calculator GUI.
This GUI should a label for its display and a keypad of calulator keys.
Note that the example changed the foreground color, background color, and
font of the Label. You do not have to do this to complete the
exercise.
Replace the Calculator label with this new sub-GUI.
Compile and test your program.
