sdalistbox.java

很好的UI界面源码..还有自己的输入法,可以更换风格.可以学习和使用

package cn.sda.ui;

import cn.sda.event.KeybordEvent;
import cn.sda.event.PointerEvent;
import javax.microedition.lcdui.Graphics;
import java.util.Vector;
import javax.microedition.lcdui.Image;

/**
 * @author not attributable
 * @version 1.0
 */
public class SDAListBox extends SDABaseControl {
    //边框
    private int borderStyle = SDAConsts.bsFixedSingle;
    //隐藏选定内容
    private boolean hideSelection = true;
    //滚动边框(多行)
    private int scrollBars = SDAConsts.srVertical;
    private int barwidth = 10;
    //边框线颜色
    private int borderColor = SDAConsts.clBlack;
    //滚动条颜色
    private int scrollBarColor = SDAConsts.clBtnFace;
    //选中后字体颜色
    private int selectedForeColor = SDAConsts.clWhite;
    private int selectedBackColor = SDAConsts.clFocusShadow;
    //内部变量
    //行数，行最大长度
    private int maxLineLenght = 0;
    private int maxLineNum = 0;
    //最大可见完整行数
    private int maxVisibleLineNum = 0;
    //垂直开始显示行
    private int startLine = 0;
    //水平开始显示位置
    private int startLeft = 0;
    //变动前位置
    private int oldStartLine = 0;
    private int oldStartLeft = 0;
    //水平滚条位置
    private int HSLeft = 0;
    private int HSTop = 0;
    private int HSWidth = 0;
    private int HSHeight = 0;
    //垂直滚动条位置
    private int VSLeft = 0;
    private int VSTop = 0;
    private int VSWidth = 0;
    private int VSHeight = 0;
    //点击的滚动条的位置
    private int oldScrollPointx = 0;
    private int oldScrollPointy = 0;
    //按下滚动条
    private boolean isscrollbarpointdown = false;
    //记录按下的滚动条0:水平，1：垂直的
    private byte scrollbardownHV = 0;
    //行的列表
    private Vector itemList;
    //当前选择行
    private int itemIndex = -1;
    //显示选择框
    private boolean showCheckBox = false;
    //显示图
    private boolean showItemImage = false;

    public SDAListBox() {
        super();
        internalSDAListBox();
    }

    private void internalSDAListBox() {
        itemList = new Vector();
        this.setVisible(true);
        setLeft(0);
        setTop(0);
        setBorderStyle(SDAConsts.bsFixedSingle);
        super.setWidth(160);
        setHeight(100);
        super.setBackColor(SDAConsts.clWhite);
        this.onPointerPressed = new PointerEvent() {

            public void Event(SDABaseControl ctrl, int x, int y) {
                doPointerPressed(x, y);
            }
        };
        this.onPointerReleased = new PointerEvent() {

            public void Event(SDABaseControl ctrl, int x, int y) {
                doPointerReleased(x, y);
            }
        };
        this.onKeyUp = new KeybordEvent() {

            public void Event(SDABaseControl ctrl, int keyCode) {
                doKeyUp(keyCode);
            }
        };
    }
    //增加项
    public SDAListItem addItem(String itemString, Image image, boolean isChecked) {
        return internalAddItem(itemString, image, isChecked);
    }

    private SDAListItem internalAddItem(String itemString, Image image, boolean isChecked) {
        SDAListItem listitem = new SDAListItem();
        listitem.setImage(image);
        listitem.setChecked(isChecked);
        listitem.setItemString(itemString);
        itemList.addElement(listitem);
        if (itemIndex == -1) {
            itemIndex = 0;
        }
        internalPaint();
        return listitem;
    }
    //删除项
    public void deleteItem(int itemIndex) {
        internalDeleteItem(itemIndex);
    }

    private void internalDeleteItem(int itemIndex) {
        if (itemList.size() > itemIndex) {
            itemList.removeElementAt(itemIndex);
            if (itemList.size() == 0) {
                itemIndex = -1;
            }
            internalPaint();
            System.gc();
        }

    }
    //清除所有项目
    public void clear() {
        internalClear();
    }

    private void internalClear() {
        itemList.removeAllElements();
        itemIndex = -1;
        System.gc();
        internalPaint();
    }
    //获取项
    public Image getItemImage(int itemIndex) {
        return internalGetItemImage(itemIndex);
    }

    private Image internalGetItemImage(int itemIndex) {
        if (itemList.size() > itemIndex) {
            SDAListItem listitem = (SDAListItem) itemList.elementAt(itemIndex);
            return listitem.getImage();
        } else {
            return null;
        }
    }

    public String getItemString(int itemIndex) {
        return internalGetItemString(itemIndex);
    }

    private String internalGetItemString(int itemIndex) {
        if (itemList.size() > itemIndex) {
            SDAListItem listitem = (SDAListItem) itemList.elementAt(itemIndex);
            return listitem.getItemString();
        } else {
            return null;
        }
    }
    //查找判断是否有指定内容的项
    public boolean findItem(String itemValue) {
        return getItem(itemValue) == null ? false : true;
    }

    public SDAListItem getItem(String itemValue) {
        return internalGetItem(itemValue);
    }

    public SDAListItem getItem() {
        return (SDAListItem) itemList.elementAt(itemIndex);
    }

    public SDAListItem getItem(int Index) {
        return (SDAListItem) itemList.elementAt(Index);
    }

    private SDAListItem internalGetItem(String itemValue) {
        SDAListItem item = null;
        SDAListItem result = null;
        for (int i = 0; i < itemList.size(); i++) {
            item = (SDAListItem) itemList.elementAt(i);
            if (item.getItemString().equals(itemValue)) {
                result = item;
                break;
            }
        }
        return result;
    }

    public boolean getItemChecked(int itemIndex) {
        return internalGetItemChecked(itemIndex);
    }

    private boolean internalGetItemChecked(int itemIndex) {
        if (itemList.size() > itemIndex) {
            SDAListItem listitem = (SDAListItem) itemList.elementAt(itemIndex);
            return listitem.isChecked();
        } else {
            return false;
        }
    }

    public int getItemCount() {
        return itemList.size();
    }

    public boolean isShowCheckBox() {
        return showCheckBox;
    }

    public void setShowCheckBox(boolean showCheckBox) {
        this.showCheckBox = showCheckBox;
        internalPaint();
    }

    public boolean isShowItemImage() {
        return showItemImage;
    }

    public void setShowItemImage(boolean showItemImage) {
        this.showItemImage = showItemImage;
    }

    public void setItemChecked(int itemIndex, boolean Checked) {
        internalSetItemChecked(itemIndex, Checked);
    }

    private void internalSetItemChecked(int itemIndex, boolean Checked) {
        if (itemList.size() > itemIndex) {
            SDAListItem listitem = (SDAListItem) itemList.elementAt(itemIndex);
            listitem.setChecked(Checked);
            internalPaint();
        }
    }

    public void setItemImage(int itemIndex, Image image) {
        internalSetItemImage(itemIndex, image);
    }

    private void internalSetItemImage(int itemIndex, Image image) {
        if (itemList.size() > itemIndex) {
            SDAListItem listitem = (SDAListItem) itemList.elementAt(itemIndex);
            listitem.setImage(image);
            internalPaint();
        }
    }

    public void setItemString(int itemIndex, String itemString) {
        internalSetItemString(itemIndex, itemString);
    }

    private void internalSetItemString(int itemIndex, String itemString) {
        if (itemList.size() > itemIndex) {
            SDAListItem listitem = (SDAListItem) itemList.elementAt(itemIndex);
            listitem.setItemString(itemString);
            internalPaint();
        }
    }

    //画
    public void paint() {
        internalPaint();
    }

    private void internalPaint() {
        if (!IsCanPaint()) {
            return;
        }
        Graphics g = form.getGraphics();
        InternalPaint(g);
        PaintChilds();
    }

    protected void InternalPaint(Graphics g) {
        //可视下才画
        if (isVisible()) {
            //初始化引用变量
            int thisWidth = getWidth();
            int thisHeight = getHeight();
            int HBarWidth = getHBarWidth();
            int VBarHeight = getVBarHeight();
            //对齐方式处理后，画组件
            //设置字体
            g.setFont(getFont());
            //外框
            SetClip(g);
            //透明
            if (!isTransparent()) {
                g.setColor(backColor);
                fillRect(g, 0, 0, thisWidth, thisHeight);
            }
            if (borderStyle == SDAConsts.bsFixed3D) {
                g.setColor(SDAConsts.clGray);
                drawLine(g, 0, 0, thisWidth, 0);
                drawLine(g, 0, 0, 0, thisHeight);
                g.setColor(SDAConsts.clBlack);
                drawLine(g, 1, 1, thisWidth - 1, 1);
                drawLine(g, 1, 1, 1, thisHeight - 1);
                g.setColor(SDAConsts.clBtnFace);
                drawLine(g, 2, thisHeight - 1, thisWidth - 2, thisHeight - 1);
                drawLine(g, thisWidth - 1, 2, thisWidth - 1, thisHeight - 1);
                g.setColor(SDAConsts.clWhite);
                drawLine(g, 1, thisHeight, thisWidth, thisHeight);
                drawLine(g, thisWidth, 1, thisWidth, thisHeight);
                if (isFoucsed()) {