602b22964099001b17aef781993f096e

《J2ME实用教程》 源文件下载 本书没有仅仅局限于J2ME单机游戏的开发

import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
public class CustomItemDemo extends MIDlet implements CommandListener {
private final static Command CMD_EXIT = new Command("Exit", Command.EXIT, 1);
private Display display;
private boolean firstTime;
private Form mainForm;
public CustomItemDemo() {
firstTime = true;
mainForm = new Form("Custom Item");
}
protected void startApp() {
if(firstTime) {
display = Display.getDisplay(this);
mainForm.append(new TextField("Upper Item", null, 10, 0));
mainForm.append(new Table("Table", Display.getDisplay(this)));
mainForm.append(new TextField("Lower Item", null, 10, 0));
mainForm.addCommand(CMD_EXIT);
mainForm.setCommandListener(this);
firstTime = false;
}
display.setCurrent(mainForm);
}
public void commandAction(Command c, Displayable d) {
if (c == CMD_EXIT) {
destroyApp(false);
notifyDestroyed();
}
}
protected void destroyApp(boolean unconditional) {
}
protected void pauseApp() {
}
}
import javax.microedition.lcdui.*;
public class Table
extends CustomItem
implements ItemCommandListener {
private final static Command CMD_EDIT = new Command("Edit",
Command.ITEM, 1);
private Display display;
private int rows = 5;
private int cols = 3;
private int dx = 50;
private int dy = 20;
private final static int UPPER = 0;
private final static int IN = 1;
private final static int LOWER = 2;
private int location = UPPER;
private int currentX = 0;
private int currentY = 0;
private String[][] data = new String[rows][cols];
// Traversal stuff
//indicating support of horizontal traversal internal to the CustomItem
boolean horz;
//indicating support for vertical traversal internal to the CustomItem.
boolean vert;
public Table(String title, Display d) {
super(title);
display = d;
setDefaultCommand(CMD_EDIT);
setItemCommandListener(this);
int interactionMode = getInteractionModes();
horz = ((interactionMode & CustomItem.TRAVERSE_HORIZONTAL) != 0);
vert = ((interactionMode & CustomItem.TRAVERSE_VERTICAL) != 0);
}
protected int getMinContentHeight() {
return (rows * dy) + 1;
}
protected int getMinContentWidth() {
return (cols * dx) + 1;
}
protected int getPrefContentHeight(int width) {
return (rows * dy) + 1;
}
protected int getPrefContentWidth(int height) {
return (cols * dx) + 1;
}
protected void paint(Graphics g, int w, int h) {
for (int i = 0; i <= rows; i++) {
g.drawLine(0, i * dy, cols * dx, i * dy);
}
for (int i = 0; i <= cols; i++) {
g.drawLine(i * dx, 0, i * dx, rows * dy);
}
int oldColor = g.getColor();
g.setColor(0x00D0D0D0);
g.fillRect((currentX * dx) + 1, (currentY * dy) + 1, dx - 1, dy - 1);
g.setColor(oldColor);
for (int i = 0; i < rows; i++) {
for (int j = 0; j < cols; j++) {
if (data[i][j] != null) {
// store clipping properties
int oldClipX = g.getClipX();
int oldClipY = g.getClipY();
int oldClipWidth = g.getClipWidth();
int oldClipHeight = g.getClipHeight();
g.setClip((j * dx) + 1, i * dy, dx - 1, dy - 1);
g.drawString(data[i][j], (j * dx) + 2, ((i + 1) * dy) - 2,
Graphics.BOTTOM | Graphics.LEFT);
// restore clipping properties
g.setClip(oldClipX, oldClipY, oldClipWidth, oldClipHeight);
}
}
}
}
protected boolean traverse(int dir, int viewportWidth, int viewportHeight,
int[] visRect_inout) {
if (horz && vert) {
switch (dir) {
case Canvas.DOWN:
if (location == UPPER) {
location = IN;
} else {
if (currentY < (rows - 1)) {
currentY++;
repaint(currentX * dx, (currentY - 1) * dy, dx, dy);
repaint(currentX * dx, currentY * dy, dx, dy);
} else {
location = LOWER;
return false;
}
}
break;
case Canvas.UP:
if (location == LOWER) {
location = IN;
} else {
if (currentY > 0) {
currentY--;
repaint(currentX * dx, (currentY + 1) * dy, dx, dy);
repaint(currentX * dx, currentY * dy, dx, dy);
} else {
location = UPPER;
return false;
}
}
break;
case Canvas.LEFT:
if (currentX > 0) {
currentX--;
repaint((currentX + 1) * dx, currentY * dy, dx, dy);
repaint(currentX * dx, currentY * dy, dx, dy);
}
break;
case Canvas.RIGHT:
if (currentX < (cols - 1)) {
currentX++;
repaint((currentX - 1) * dx, currentY * dy, dx, dy);
repaint(currentX * dx, currentY * dy, dx, dy);
}
}
} else if (horz || vert) {
switch (dir) {
case Canvas.UP:
case Canvas.LEFT:
if (location == LOWER) {
location = IN;
} else {
if (currentX > 0) {
currentX--;
repaint((currentX + 1) * dx, currentY * dy, dx, dy);
repaint(currentX * dx, currentY * dy, dx, dy);
} else if (currentY > 0) {
currentY--;
repaint(currentX * dx, (currentY + 1) * dy, dx, dy);
currentX = cols - 1;
repaint(currentX * dx, currentY * dy, dx, dy);
} else {
location = UPPER;
return false;
}
}
break;
case Canvas.DOWN:
case Canvas.RIGHT:
if (location == UPPER) {
location = IN;
} else {
if (currentX < (cols - 1)) {
currentX++;
repaint((currentX - 1) * dx, currentY * dy, dx, dy);
repaint(currentX * dx, currentY * dy, dx, dy);
} else if (currentY < (rows - 1)) {
currentY++;
repaint(currentX * dx, (currentY - 1) * dy, dx, dy);
currentX = 0;
repaint(currentX * dx, currentY * dy, dx, dy);
} else {
location = LOWER;
return false;
}
}
}
} else {
//In case of no Traversal at all: (horz|vert) == 0
}
visRect_inout[0] = currentX;
visRect_inout[1] = currentY;
visRect_inout[2] = dx;
visRect_inout[3] = dy;
return true;
}
public void setText(String text) {
data[currentY][currentX] = text;
repaint(currentY * dx, currentX * dy, dx, dy);
}
public void commandAction(Command c, Item i) {
if (c == CMD_EDIT) {
TextInput textInput = new TextInput(data[currentY][currentX], this,
display);
display.setCurrent(textInput);
}
}
}