Java Reference
In-Depth Information
out
, with the components in the
NORTH
region, the main drawing panel in the
CENTER
region, and a
status bar in the
SOUTH
region, as in Fig. 12.49. In the top panel, create the components listed
below. Each component's event handler should call the appropriate method in class
DrawPanel
.
a) A button to undo the last shape drawn.
b) A button to clear all shapes from the drawing.
c) A combo box for selecting the color from the 13 predefined colors.
d) A combo box for selecting the shape to draw.
e) A checkbox that specifies whether a shape should be filled or unfilled.
Declare and create the interface components in
DrawFrame
's constructor. You'll need to create
the status bar
JLabel
before you create the
DrawPanel
, so you can pass the
JLabel
as an argument
to
DrawPanel
's constructor. Finally, create a test class that initializes and displays the
DrawFrame
to
execute the application.
Fig. 12.49
|
Interface for drawing shapes.
12.18
(GUI-Based Version of the ATM Case Study)
Reimplement the Optional ATM Case Study
of Chapters 33-34 as a GUI-based application. Use GUI components to approximate the ATM
user interface shown in Fig. 33.1. For the cash dispenser and the deposit slot use
JButton
s labeled
Remove Cash
and
Insert Envelope
. This will enable the application to receive events indicating when
the user takes the cash and inserts a deposit envelope, respectively.
Making a Difference
erlands-based company)—is a free, open-source computer font designed to reduce by as much as
20% the amount of ink used for printing, thus reducing also the number of ink cartridges used and
the environmental impact of the manufacturing and shipping processes (using less energy, less fuel
for shipping, and so on). The font, based on sans-serif Verdana, has small circular “holes” in the
letters that are not visible in smaller sizes—such as the 9- or 10-point type frequently used. Down-
load Ecofont, then install the font file
Spranq_eco_sans_regular.ttf
using the instructions from
the Ecofont website. Next, develop a GUI-based program that allows you to type in a text string to
be displayed in the Ecofont. Create
Increase Font Size
and
Decrease Font Size
buttons that allow you
