netdataform.java

这是一款功能完备的横版闯关手机游戏

//package bushfighting;

import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Canvas;
import com.nokia.mid.ui.FullCanvas;

//NetDataForm用于管理排行榜的上传和下载的工作
public class NetDataForm extends FullCanvas
{
    public static final int STATE_MSGDISPLAY = 5; //其他情形，用于显示基本信息，作用等同MsgForm
    private int mCurrentState; //当前窗口的状态
    protected Score mScore = null;
    private String mNickName, mPhone;
    protected String mTitle = ""; //消息框的标题
    protected String mMessage = ""; //消息框的内容
    protected String mRightBar, mLeftBar; //状态栏显示的信息
    protected int mCanvasWidth, mCanvasHeight; //屏幕的大小
    protected DisplayManager mDisplayManager = null;
    private Image mBufferImage = null; //双缓冲的图片
    private Graphics mBGraphics = null;
    private int mScrollIndex = 0; //为了支持滚动而设置的，标识当前的开始行
    private boolean mIsNeedScrolled = false; //当前的显示是否需要滚动

    public NetDataForm(DisplayManager manager, Score score, Image bufferImg)
    {
        mDisplayManager = manager;
        mCanvasWidth = getWidth();
        mCanvasHeight = getHeight();
        mScore = score;
        mBufferImage = bufferImg;
        mBGraphics = mBufferImage.getGraphics();
        mCurrentState = STATE_MSGDISPLAY;
    }

    //设置当前的窗口状态
    public void setState(int state)
    {
        if (state < 1 || state > 5)
            return; //防止一些不正确的状态值
        mCurrentState = state;
        mIsNeedScrolled = false;
        mScrollIndex = 0; //重置当前的滚动行为0
    }

    //处理按键事件
    public void keyPressed(int keyCode)
    {
        if (keyCode == -6) { //右上角的按键
            back(); //返回上一级显示
            return;
        }
        else {
            int action = getGameAction(keyCode);
            switch (action) {
                case DOWN:
                    if (mIsNeedScrolled == true) {
                        mScrollIndex = mScrollIndex + 1;
                        repaint(0, 0, mCanvasWidth, mCanvasHeight);
                    }
                    break;
                case UP:
                    if (mScrollIndex > 0) {
                        mScrollIndex = mScrollIndex - 1;
                        repaint(0, 0, mCanvasWidth, mCanvasHeight);
                    }
                    break;
            }
        }
    }

    public void showLocalRolls()
    {
        mScrollIndex = 0; //重置当前的滚动行为0
        mCurrentState = STATE_MSGDISPLAY;
        String[] nickNames = mScore.mNickNames;
        int[] scores = mScore.mRecordScores;
        StringBuffer strBuf = new StringBuffer(60);
        for (int i = 0; i < scores.length; i++) {
            strBuf.append("第");
            strBuf.append(i + 1);
            strBuf.append("名    ");
            strBuf.append(nickNames[i]);
            strBuf.append("    ");
            strBuf.append(scores[i]);
            if (i != scores.length - 1)
                strBuf.append("&");
        }
        set("本地排行榜", strBuf.toString());
    }

    //根据不同状态绘制界面
    protected void paint(Graphics g)
    {
        clearScreen(g, HF.COLOR_WHITE);
        if (mCurrentState == STATE_MSGDISPLAY) {
            drawHeader(g);
            drawMessage(g);
            setStatusBar("返回", "");
            drawStatusBar(g);
        }
    }

    //设置显示的标题和显示的信息
    public void set(String title, String msg)
    {
        mTitle = title;
        mMessage = msg;
    }

    public void setStatusBar(String l_Bar, String r_Bar)
    {
        mLeftBar = l_Bar;
        mRightBar = r_Bar;
    }

    //绘制标题栏
    protected void drawHeader(Graphics g)
    {
        int color = HF.COLOR_WHITE;
        for (int j = 10; j >= 0; j--) {
            g.setColor(color);
            color -= 0x191900;
            g.fillRect(j * (mCanvasWidth / 10), HF.LARGE_FONT.getHeight(), (j + 1) * (mCanvasWidth / 10), 7);
        }
        g.setColor(HF.COLOR_RED);
        g.setFont(HF.LARGE_FONT);
        g.drawString(mTitle, mCanvasWidth / 2, 0, Graphics.HCENTER | Graphics.TOP);
    }

    //绘制信息区,如果需要分行的话，就用&作为分隔符
    protected void drawMessage(Graphics g)
    {
        if (mMessage == null)
            return;
        g.setFont(HF.MEDIUM_FONT);
        g.setColor(HF.COLOR_BLACK);
        int offset = HF.MEDIUM_FONT.getHeight();
        int x = 2, y = 30;
        int pos1 = 0, pos2 = 0;
        int count = 0;
        do {
            pos1 = mMessage.indexOf("&", pos2);
            count++;
            if (count > mScrollIndex) { //当前位置是需要显示的
                if (y >= 0 && y < mCanvasHeight)
                    g.drawSubstring(mMessage, pos2, pos1 != -1 ? pos1 - pos2 : mMessage.length() - pos2, x, y,
                                    Graphics.LEFT | Graphics.TOP);
                y += offset;
            }
            pos2 = pos1 + 1;
        }
        while (pos1 != -1);
        if (y > mCanvasHeight - 14) {
            mIsNeedScrolled = true;
        }
        else{
            mIsNeedScrolled = false;
        }
    }

    //绘制状态栏
    public static void drawStatusBar(Graphics g, int barColor, String leftBar, String rightBar, int screenWidth, int screenHeight)
    {
        int fontHeight = g.getFont().getHeight();
        int length = g.getFont().stringWidth(rightBar);
        g.setColor(barColor);
        g.fillRect(0, screenHeight - fontHeight - 2, screenWidth, fontHeight + 2);
        g.setColor(HF.COLOR_BLACK);
        g.drawString(leftBar, 1, screenHeight - fontHeight + 1, Graphics.LEFT | Graphics.TOP);
        g.drawString(rightBar, screenWidth - length - 4, screenHeight - fontHeight + 1, Graphics.LEFT | Graphics.TOP);
    }

    protected void drawStatusBar(Graphics g)
    {
        g.setFont(HF.MEDIUM_FONT);
        drawStatusBar(g, HF.COLOR_LIGHTBLUE, mLeftBar, mRightBar, mCanvasWidth, mCanvasHeight);
    }

    //使用指定的颜色清屏
    public void clearScreen(Graphics g, int bgColor)
    {
        g.setColor(bgColor);
        g.fillRect(0, 0, mCanvasWidth, mCanvasHeight);
    }

    //绘制方框
    public static void drawFrame(Graphics g, int color, int x, int y, int width, int height)
    {
        g.setColor(color);
        g.fillRect(x, y, width, height);
    }

    //后退到上一级的显示
    protected void back()
    {
        mDisplayManager.back();
    }
}