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/*
* Copyright © 2002 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has
* intellectual property rights relating to technology embodied in the product
* that is described in this document. In particular, and without limitation,
* these intellectual property rights may include one or more of the U.S.
* patents listed at http://www.sun.com/patents and one or more additional
* patents or pending patent applications in the U.S. and in other countries.
* U.S. Government Rights - Commercial software. Government users are subject
* to the Sun Microsystems, Inc. standard license agreement and applicable
* provisions of the FAR and its supplements. Use is subject to license terms.
* Sun, Sun Microsystems, the Sun logo and Java are trademarks or registered
* trademarks of Sun Microsystems, Inc. in the U.S. and other countries. This
* product is covered and controlled by U.S. Export Control laws and may be
* subject to the export or import laws in other countries. Nuclear, missile,
* chemical biological weapons or nuclear maritime end uses or end users,
* whether direct or indirect, are strictly prohibited. Export or reexport
* to countries subject to U.S. embargo or to entities identified on U.S.
* export exclusion lists, including, but not limited to, the denied persons
* and specially designated nationals lists is strictly prohibited.
*/
import java.awt.*;
public class CalcGUI extends Frame implements CalcInputParserConstants {
/**
* A button object is created for each calculator button. Since
* there is going to be only one calculator GUI, these objects can
* be static.
*/
static Button one = new Button("1");
static Button two = new Button("2");
static Button three = new Button("3");
static Button four = new Button("4");
static Button five = new Button("5");
static Button six = new Button("6");
static Button seven = new Button("7");
static Button eight = new Button("8");
static Button nine = new Button("9");
static Button zero = new Button("0");
static Button dot = new Button(".");
static Button equal = new Button("=");
static Button add = new Button("+");
static Button sub = new Button("-");
static Button mul = new Button("*");
static Button div = new Button("/");
static Button quit = new Button("QUIT");
/**
* The display window with its initial setting.
*/
static Label display = new Label("0 ");
/**
* Constructor that creates the full GUI. This is called by the
* main program to create one calculator GUI.
*/
public CalcGUI() {
super("Calculator");
GridBagLayout gb = new GridBagLayout();
setLayout(gb);
GridBagConstraints gbc = new GridBagConstraints();
display.setFont(new Font("TimesRoman", Font.BOLD, 18));
display.setAlignment(Label.RIGHT);
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.fill = GridBagConstraints.BOTH;
gbc.weightx = 1.0;
gbc.weighty = 0.0;
gb.setConstraints(display, gbc);
add(display);
Panel buttonPanel = new Panel();
buttonPanel.setFont(new Font("TimesRoman", Font.BOLD, 14));
buttonPanel.setLayout(new GridLayout(4,4));
buttonPanel.add(one); buttonPanel.add(two); buttonPanel.add(three); buttonPanel.add(four);
buttonPanel.add(five); buttonPanel.add(six); buttonPanel.add(seven); buttonPanel.add(eight);
buttonPanel.add(nine); buttonPanel.add(zero); buttonPanel.add(dot); buttonPanel.add(equal);
buttonPanel.add(add); buttonPanel.add(sub); buttonPanel.add(mul); buttonPanel.add(div);
gbc.weighty = 1.0;
gb.setConstraints(buttonPanel, gbc);
add(buttonPanel);
quit.setFont(new Font("TimesRoman", Font.BOLD, 14));
gbc.gridheight = GridBagConstraints.REMAINDER;
gbc.weighty = 0.0;
gb.setConstraints(quit, gbc);
add(quit);
pack();
show();
}
/**
* Note how handleEvent creates tokens and sends them to the parser
* through the producer-consumer.
*/
public boolean handleEvent(Event evt) {
Token t;
if (evt.id != Event.ACTION_EVENT) {
return false;
}
if (evt.target == one) {
t = new Token();
t.kind = DIGIT;
t.image = "1";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == two) {
t = new Token();
t.kind = DIGIT;
t.image = "2";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == three) {
t = new Token();
t.kind = DIGIT;
t.image = "3";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == four) {
t = new Token();
t.kind = DIGIT;
t.image = "4";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == five) {
t = new Token();
t.kind = DIGIT;
t.image = "5";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == six) {
t = new Token();
t.kind = DIGIT;
t.image = "6";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == seven) {
t = new Token();
t.kind = DIGIT;
t.image = "7";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == eight) {
t = new Token();
t.kind = DIGIT;
t.image = "8";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == nine) {
t = new Token();
t.kind = DIGIT;
t.image = "9";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == zero) {
t = new Token();
t.kind = DIGIT;
t.image = "0";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == dot) {
t = new Token();
t.kind = DOT;
t.image = ".";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == equal) {
t = new Token();
t.kind = EQ;
t.image = "=";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == add) {
t = new Token();
t.kind = ADD;
t.image = "+";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == sub) {
t = new Token();
t.kind = SUB;
t.image = "-";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == mul) {
t = new Token();
t.kind = MUL;
t.image = "*";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == div) {
t = new Token();
t.kind = DIV;
t.image = "/";
ProducerConsumer.pc.addToken(t);
return true;
}
if (evt.target == quit) {
System.exit(0);
}
return false;
}
public static void print(double value) {
display.setText(Double.toString(value) + " ");
}
public static void print(String image) {
display.setText(image + " ");
}
}
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