courseitem.java

一款Java版的课程表软件

package ui.unit;

import javax.microedition.lcdui.Canvas;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CustomItem;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.ItemCommandListener;

import clasAn.core.GUIInfo;

import ui.TextInput;

/**
 * 
 * @version 2.0
 */
public class CourseItem extends CustomItem implements ItemCommandListener,
		Runnable {

	private static final Command CMD_EDIT = new Command(GUIInfo.COMMAND_EDIT, Command.ITEM, 1);
	private static final int UPPER = 0;
	private static final int IN = 1;
	private static final int LOWER = 2;
	// private static final String[8]={"第一节","第二节","第二节"}
	private Display display;
	private int maxSize = 4;

	private Font font;
	private int fontHeight;
	private int width;

	private String time;
	private String content = "空";
	private String rollingContent;
	private int location = UPPER;
	private int frameDelay = 1000;
	boolean sleeping = true;
	private Thread t = null;
	private boolean isEdited = false;

	// 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 CourseItem(String title, String time, String content, int maxSize,
			Display d) {
		super(title);
		this.display = d;
		this.time = time;
		this.content = content;
		this.maxSize = this.maxSize <= maxSize ? maxSize : this.maxSize;
		this.rollingContent = contentAddBlank();
		font = Font.getDefaultFont();
		fontHeight = font.getHeight();

		width = font.charWidth('我') * this.maxSize;
		System.out.println(width);

		setDefaultCommand(CMD_EDIT);
		setItemCommandListener(this);

		int interactionMode = getInteractionModes();// 获得可实现的交互模式
		horz = ((interactionMode & CustomItem.TRAVERSE_HORIZONTAL) != 0);
		vert = ((interactionMode & CustomItem.TRAVERSE_VERTICAL) != 0);

	}

	protected int getMinContentHeight() {
		return fontHeight;

	}

	protected int getMinContentWidth() {
		return font.stringWidth(this.getLabel()) + 3;
	}

	protected int getPrefContentHeight(int width) {
		return fontHeight * 2 + 2;
	}

	// 获得首选宽度
	protected int getPrefContentWidth(int height) {
		return this.width + 3;
	}

	private String rollString(String s, int offset) {
		String tmpsString;
		tmpsString = s.substring(offset, s.length());
		System.out.println(tmpsString
				+ s.substring(s.length() - tmpsString.length(), s.length()));
		return tmpsString + s.substring(0, offset);
	}

	// 画图
	protected void paint(Graphics g, int w, int h) {
		int dy = 0;
		g.setColor(0xffffff);
		g.fillRect(0, 0, width + 3, 2 * font.getHeight());

		if (location != IN)
			g.setColor(0x000000);
		else
			g.setColor(0x0000ff);
		g.drawString(this.time, 2, dy, Graphics.TOP | Graphics.LEFT);
		dy += font.getHeight();
		g.drawString(this.rollingContent, 2, dy, Graphics.TOP | Graphics.LEFT);
		g.setStrokeStyle(Graphics.DOTTED);
		g.drawRect(0, 0, width + 2, dy + font.getHeight());
	}

	// 横贯来回移动 //动作

	protected boolean traverse(int dir, int viewportWidth, int viewportHeight,
			int[] visRect_inout) {
		if (font.stringWidth(content) > width)
			this.start();
		// 可以水平和纵向移动
		if (horz && vert) {
			switch (dir) {
			case Canvas.DOWN:

				if (location == UPPER) {// 如果选择框在Table的上方
					location = IN;// 位置为进入
					repaint();
				} else if (location == IN) {
					location = LOWER;
					return false;
				}
				break;

			case Canvas.UP:

				if (location == LOWER) {
					location = IN;
					repaint();
				} else if (location == IN) {
					location = UPPER;
					return false;
				}

				break;

			case Canvas.LEFT:
				// System.out.println("内容左移");
				if (font.stringWidth(content) > width)
					this.rollingContent = this.rollString(rollingContent, 1);
				repaint();
				break;

			case Canvas.RIGHT:
				// System.out.println("内容 右移");
			}
		} else {// 不能水平和纵向移动
			// In case of no Traversal at all: (horz|vert) == 0
		}
		// visRect_inout[0]=0;
		// visRect_inout[1]=12;
		// visRect_inout[2]=32;
		// visRect_inout[3]=32;
		return true;
	}

	public void start() {
		this.sleeping = false;
		t = new Thread(this);
		t.start();
	}

	public void stop() {
		sleeping = true;
	}

	public void run() {
		// TODO Auto-generated method stub

		while (!sleeping) {

			try {
				Thread.sleep(frameDelay);
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
			if (!sleeping)
				this.rollingContent = rollString(rollingContent, 1);
			repaint();

		}
	}

	protected void traverseOut() {
		this.stop();
		t = null;
		this.rollingContent = contentAddBlank();
		repaint();
	}

	// 设置表格内容
	public void setContent(String text) {
		//如果输入的文本不为空
		if (text.length() != 0) {
			//如果输入的文本与原课程内容不一致
			if (!text.endsWith(this.content)) {
				this.setEdited(true);
				this.content = text;
			}

		} else {
			this.setEdited(false);
		}

		rollingContent = contentAddBlank();
		repaint();

	}

	// 获得课程内容
	public String getContent() {
		return this.content;
	}

	private String contentAddBlank() {
		return this.content + "         ";
	}

	// 获取是否编辑过标志
	public boolean isEdited() {
		return this.isEdited;
	}

	// 设置是否编辑过标志
	private void setEdited(boolean e) {
		this.isEdited = e;
	}

	public void commandAction(Command c, Item i) {
		if (c == CMD_EDIT) {
			TextInput textInput = new TextInput(this.content, this, display);
			display.setCurrent(textInput);
		}
	}
}