ui_textarea.java

手机文本浏览器

package com.cnxinshe.noteview;

import java.util.Vector;

import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Image;



/**
 * 
 * 文本区域类
 */
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 */
	
	// 文本显示区域起点X,Y坐标
	private int contentX = 0, contentY = 20; 
	// 文本显示区域的宽度和高度
	private int contentWidth = 225, contentHeight = 250;
	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 = 219;
	private int scrollY = 20;
	private int scrollWidth = 20;
	private int scrollHeight = 270;
	/** 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 =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, 0, 240, 20);
		g.setColor(0xFFFFFF);
		g.drawString("超级阅读", 5, 2, 0);

		// 画背景美女
		// g.drawImage(util.Util.getImage("back_pic_girl"), 150, 80, 0);
		// 文本绘制
		g.setColor(0xffffff);
		g.drawString("返回", 0,290, 0);
//		g.drawRect(0, 290, 10, 10);
		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;
		case Platform.KEY_LEFT:
			
			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;
	}
}