<原创>自定义的一个文本显示框（自定义分行，滚动条）

package com.yj.menu; import com.yj.util.Platform; import com.yj.util.Util; import java.util.Vector; import javax.bluetooth.DeviceClass; import javax.microedition.lcdui.Graphics; import javax.microedition.lcdui.Image; /** * * @author 尹佳 * QQ:387687685 * email:387687685@qq.com */ public class UI_TextArea { private String title; private String content; private Image titleImage; private UI_Scroll scroll; private Vector vector = new Vector(); /**定制的文本显示区域坐标参数值*/ private int contentX = 0, contentY = 70; //文本显示区域起点X,Y坐标 private int contentWidth = 220, contentHeight = 225; //文本显示区域的宽度和高度 private int space = 5; //文本离边框的距离 /**定制的滚动条坐标参数值*/ private int scrollX = 220; private int scrollY = 70; private int scrollWidth = 20; private int scrollHeight = 225; /**关于文本显示以及滚动定义的一些数值*/ private int rowSpace = 0; //行与行之间的间隙 private int alreaView = 0; //已经显示的 private int movePlex = 15; //竖直方向 每次移动的像素 private int allView = 0; private int canView = contentHeight - 10; private int startView = contentY + space; public UI_TextArea(String title, String content) { this.title = title; this.content = content; titleImage = Util.getImage("back_title"); scroll = new UI_Scroll(scrollX, scrollY, scrollWidth, scrollHeight); vector = com.yj.util.Util.textToRows(contentWidth - 2 * space, content); allView = vector.size() * Platform.FONT_HEIGHT; } public void paint(Graphics g) { //画顶部title图片 g.drawImage(titleImage, 0, 0, 0); //标题栏 g.setColor(0x292929); g.fillRect(0, 40, 240, 30); g.setColor(0xFFFFFF); g.drawString("文本框测试", 10, 45, 0); //画背景美女 g.drawImage(Util.getImage("back_pic_girl"), 150, 80, 0); //文本绘制 paintContent(g); //滚动条 scroll.setRect(contentY + space + canView - startView, canView, allView); scroll.paint(g); } private void paintContent(Graphics g) { g.setClip(contentX, contentY, contentWidth, contentHeight); int y = startView; for (int i = 0; i < vector.size(); i++) { g.drawString(vector.elementAt(i).toString(), contentX + space, y, 0); y += Platform.FONT_HEIGHT; } g.setClip(0, 0, Platform.FULL_SCREEN_WIDTH, Platform.FULL_SCREEN_HEIGHT); } //************按键事件处理区***********开始************** public void keyPress(int keyCode) { switch (keyCode) { case Platform.KEY_UP: keyUp(); break; case Platform.KEY_DOWN: keyDown(); break; default: return; } } private void keyUp() { if (startView >= contentY + space) { return; } if (allView <= canView) { return; } if (contentY + space - startView < movePlex) { startView = contentY + space; } else { startView += movePlex; } } private void keyDown() { if (allView <= canView) { return; } if (startView + allView - contentY - space - canView < movePlex) { startView = contentY + space + canView - allView; } else { startView -= movePlex; } } //************按键事件处理区***********结束************** private void setContent(String content) { this.content = content; } private void setTitle(String title) { this.title = title; } }