listshow.java

MoMEUnit是一个单元测试的J2ME的应用程序xUnit架构实例。这是来自JUnit框架

package mome.ext;

import java.util.Vector;

import javax.microedition.lcdui.Font;
import javax.microedition.lcdui.Graphics;

/**
 * @author Sergio Morozov
 * @version 0.9
 */
public class ListShow
{

  /**
   * @since 0.9
   */
  public static final int DEFAULT_SELECTED_BGCOLOR = 0xFFFFFF;

  /**
   * @since 0.9
   */
  public static final int DEFAULT_SELECTED_FGCOLOR = 0x0;

  /**
   * @since 0.9
   */
  public static final int DEFAULT_FGCOLOR = 0xFFFFFF;

  public static final int DEFAULT_BGCOLOR = 0x0;

  private int x = 0;

  private int y = 0;

  private int width = 0;

  private int height = 0;

  private Vector items = new Vector();

  private Vector itemFonts = new Vector();

  private int selected = 0;

  private int bgColor = DEFAULT_BGCOLOR;

  private int fgColor = DEFAULT_FGCOLOR;

  private int selectedBGColor = DEFAULT_SELECTED_BGCOLOR;

  private int selectedFGColor = DEFAULT_SELECTED_FGCOLOR;

  private int startPageItem = 0;

  private int endPageItem = 0;

  private boolean paintDown = true;

  public ListShow(int x, int y, int width, int height)
  {
    this.x = x;
    this.y = y;
    this.width = width;
    this.height = height;
  }

  public ListShow(int x, int y, int width, int height, String[] items,
      Font[] fonts)
  {
    this(x, y, width, height);
    if (items == null) throw new NullPointerException("items");
    if (fonts == null) throw new NullPointerException("itemFonts");
    int length = items.length;
    int fontsLength = fonts.length;
    if (fontsLength > length) throw new IllegalArgumentException(
        "size of fonts > size of items: " + fontsLength + " > " + length);
    for (int i = 0; i < length; i++)
      if (i < fontsLength) this.append(items[i], fonts[i]);
      else this.append(items[i]);
  }

  public void setBGColor(int color)
  {
    this.bgColor = color;
  }

  public void setFGColor(int color)
  {
    this.fgColor = color;
  }

  public void setSelectedBGColor(int color)
  {
    this.selectedBGColor = color;
  }

  public void setSelectedFGColor(int color)
  {
    this.selectedFGColor = color;
  }

  public void append(String item, Font font)
  {
    if (item == null) throw new NullPointerException("item");
    if (font == null) font = Font.getDefaultFont();
    this.items.addElement(item);
    this.itemFonts.addElement(font);
  }

  public void append(String item)
  {
    this.append(item, null);
  }

  public void delete(int pos)
  {
    this.items.removeElementAt(pos);
    this.itemFonts.removeElementAt(pos);
    if (pos <= this.startPageItem)
    {
      this.startPageItem--;
      this.paintDown = true;
    }
    if (pos <= this.selected)
    {
      this.selected--;
      this.paintDown = true;
    }
    if (pos <= this.endPageItem)
    {
      this.endPageItem--;
      this.paintDown = true;
    }
  }

  public void deleteAll()
  {
    this.items.removeAllElements();
    this.itemFonts.removeAllElements();
    this.selected = 0;
    this.startPageItem = 0;
    this.endPageItem = 0;
    this.paintDown = true;
  }

  public void set(int pos, String item, Font font)
  {
    if (item == null) throw new NullPointerException("item");
    if (font == null) font = Font.getDefaultFont();
    this.items.setElementAt(item, pos);
    this.itemFonts.setElementAt(font, pos);
  }

  public boolean isSelected(int pos)
  {
    return pos == this.selected;
  }

  public int getSelectedIndex()
  {
    return (this.items.size() > 0) ? this.selected : -1;
  }

  public String getSelected()
  {
    return (this.items.size() > 0) ? (String) this.items
        .elementAt(this.selected) : null;
  }

  public boolean next()
  {
    boolean res = false;
    if (this.selected < this.items.size() - 1)
    {
      res = true;
      if (++this.selected > this.endPageItem)
      {
        this.paintDown = false;
        this.endPageItem = this.selected;
      }
    }
    return res;
  }

  public boolean prev()
  {
    boolean res = false;
    if (this.selected > 0)
    {
      res = true;
      if (--this.selected < this.startPageItem)
      {
        this.paintDown = true;
        this.startPageItem = this.selected;
      }
    }
    return res;
  }

  public void previous()
  {
    if (this.selected > 0) this.selected--;
  }

  public void show(Graphics g)
  {
    int clipX = g.getClipX();
    int clipY = g.getClipY();
    int clipW = g.getClipWidth();
    int clipH = g.getClipHeight();
    g.setClip(this.x, this.y, this.width, this.height);
    int itemHeight;
    g.setColor(this.bgColor);
    g.fillRect(this.x, this.y, this.width, this.height);
    g.setColor(this.fgColor);
    if (this.paintDown)
    {
      int iLenght = this.items.size();
      int curY = this.y;
      for (int i = this.startPageItem; (i < iLenght)
          && (curY - this.y
              + (itemHeight = ((Font) this.itemFonts.elementAt(i)).getHeight()) <= this.height); i++)
      {
        String item = (String) this.items.elementAt(i);
        Font font = (Font) this.itemFonts.elementAt(i);
        g.setFont(font);
        int itemWidth = font.stringWidth(item);
        if (i == this.selected)
        {
          g.setColor(this.selectedBGColor);
          g.fillRect(this.x, curY, itemWidth + 4, itemHeight);
          g.setColor(this.selectedFGColor);
          g.drawString(item, this.x + 2, curY, Graphics.TOP | Graphics.LEFT);
          g.setColor(this.fgColor);
        } else g.drawString((String) this.items.elementAt(i), this.x + 2, curY,
            Graphics.TOP | Graphics.LEFT);
        curY += itemHeight;
        this.endPageItem = i;
      }
      if (this.endPageItem < this.items.size() - 1) g.drawString(
          (String) this.items.elementAt(this.endPageItem + 1), this.x + 2,
          curY, Graphics.TOP | Graphics.LEFT);

    } else
    {
      int curY = this.y + this.height;
      for (int i = this.endPageItem; i >= 0
          && curY
              - (itemHeight = ((Font) this.itemFonts.elementAt(i)).getHeight()) >= this.y; i--)
      {
        String item = (String) this.items.elementAt(i);
        Font font = (Font) this.itemFonts.elementAt(i);
        g.setFont(font);
        int itemWidth = font.stringWidth(item);
        if (i == this.selected)
        {
          g.setColor(this.selectedBGColor);
          g.fillRect(this.x, curY - itemHeight, itemWidth + 4, itemHeight);
          g.setColor(this.selectedFGColor);
          g.drawString((String) this.items.elementAt(i), this.x + 2, curY,
              Graphics.BOTTOM | Graphics.LEFT);
          g.setColor(this.fgColor);
        } else g.drawString((String) this.items.elementAt(i), this.x + 2, curY,
            Graphics.BOTTOM | Graphics.LEFT);
        curY -= itemHeight;
        this.startPageItem = i;
      }
      if (this.startPageItem > 0) g.drawString((String) this.items
          .elementAt(this.startPageItem - 1), this.x + 2, curY, Graphics.BOTTOM
          | Graphics.LEFT);
    }
    g.setClip(clipX, clipY, clipW, clipH);
  }

  /**
   * @return the y
   * @since 0.9
   */
  public int getY()
  {
    return this.y;
  }

  /**
   * @param y
   *          the y to set
   * @since 0.9
   */
  public void setY(int y)
  {
    this.y = y;
  }

  /**
   * @return the height
   * @since 0.9
   */
  public int getHeight()
  {
    return this.height;
  }

  /**
   * @return the width
   * @since 0.9
   */
  public int getWidth()
  {
    return this.width;
  }

  /**
   * @return the x
   * @since 0.9
   */
  public int getX()
  {
    return this.x;
  }
}