BlackBerry - 以编程方式显示打字模式指示灯

Question

您知道某种方式让programmaticaly在屏幕上显示不同的typing indicators？
我知道我可以简单地绘制位图，但我想为任何RIM操作系统版本通用。
此外，还有一个setMode(int)功能4.2.1，但4.3，它已经过时......

任何建议会有所帮助，谢谢！

Answer 1

，因为没有替代品，我做了provided images样本：

alt text http://img42.imageshack.us/img42/6692/typeindicator.jpg alt text http://img3.imageshack.us/img3/5259/inputind.jpg

自定义标题字段类代码：

class TITitleField extends Field implements DrawStyle { 
    static final boolean mIsDimTheme = Integer.parseInt(DeviceInfo 
      .getDeviceName().substring(0, 4)) < 8900; 
    static final Bitmap ALT = Bitmap.getBitmapResource(mIsDimTheme ? 
      "typ_ind_alt_mode_Gen_Zen_328560_11.jpg" : 
      "typ_ind_alt_mode_Precsn_Zen_392908_11.jpg"); 
    static final Bitmap MULTITAP = Bitmap.getBitmapResource(mIsDimTheme ? 
    "typ_ind_mltap_mode_Gen_Zen_328975_11.jpg" : 
    "typ_ind_mutlitap_mode_Precsn_Zen_452907_11.jpg"); 
    static final Bitmap NUMLOCK = Bitmap 
     .getBitmapResource(mIsDimTheme ? 
      "typ_ind_num_lock_Gen_Zen_328568_11.jpg" : 
      "typ_ind_num_lock_Precsn_Zen_392925_11.jpg"); 
    static final Bitmap SHIFT = Bitmap.getBitmapResource(mIsDimTheme ? 
      "typ_ind_shift_mode_Gen_Zen_328574_11.jpg" : 
      "typ_ind_shift_mode_Precsn_Zen_392931_11.jpg"); 

    public static final int MODE_NONE = 0; 
    public static final int MODE_ALT = 1; 
    public static final int MODE_MULTITAP = 2; 
    public static final int MODE_NUMLOCK = 3; 
    public static final int MODE_SHIFT = 4; 

    public void setTypingIndicatorMode(int mode) { 
     mMode = mode; 
     updateLayout(); 
    } 

    public int getTypingIndicatorMode() 
    { 
     return mMode;  
    } 

    int mWidth = 0; 
    int mMode = 0; 
    String mTitle = ""; 
    XYRect mIndicatorDestRect = new XYRect(); 

    public TITitleField() { 
     this(""); 
    } 

    public TITitleField(String title) { 
     mTitle = title; 
    } 

    protected void paint(Graphics graphics) { 
     graphics.drawText(mTitle, 0, 0, LEFT | ELLIPSIS, mWidth); 
     if (0 != mMode) { 
      graphics.drawBitmap(mIndicatorDestRect,getIndicator(mMode),0,0); 
     } 
    } 

    private static Bitmap getIndicator(int mode) { 
     Bitmap result = null; 
     switch (mode) { 
     case MODE_ALT: 
      result = ALT; 
      break; 
     case MODE_MULTITAP: 
      result = MULTITAP; 
      break; 
     case MODE_NUMLOCK: 
      result = NUMLOCK; 
      break; 
     case MODE_SHIFT: 
      result = SHIFT; 
      break; 
     case MODE_NONE: 
      break; 
     default: 
      break; 
     } 
     return result; 
    } 

    protected void layout(int width, int height) { 
     mWidth = width; 
     if (0 != mMode) { 
      Bitmap indicator = getIndicator(mMode); 
      mIndicatorDestRect.width = indicator.getWidth(); 
      mIndicatorDestRect.height = indicator.getHeight(); 
      mIndicatorDestRect.y = 0; 
      mIndicatorDestRect.x = mWidth - mIndicatorDestRect.width; 
     } 
     setExtent(width, getPreferredHeight()); 
    } 

    public int getPreferredHeight() { 
     int height = getFont().getHeight() + 4; 
     if (0 != mMode) { 
      int indicatorHeight = getIndicator(mMode).getHeight(); 
      height = Math.max(height, indicatorHeight); 
     } 
     return height; 
    } 
} 

的使用代码示例：

class Scr extends MainScreen { 
    static final TITitleField mTitle = new TITitleField("Start"); 

    public Scr() { 
     this.setTitle(mTitle); 
    } 

    protected void makeMenu(Menu menu, int instance) { 
     super.makeMenu(menu, instance); 

     int typingIndicatorMode = mTitle.getTypingIndicatorMode(); 

     if(typingIndicatorMode != mTitle.MODE_NONE) 
     menu.add(new MenuItem("None Mode", 0, 0) { 
      public void run() { 
       mTitle.setTypingIndicatorMode(mTitle.MODE_NONE); 
      } 
     }); 

     if(typingIndicatorMode != mTitle.MODE_ALT) 
     menu.add(new MenuItem("Alt Mode", 0, 0) { 
      public void run() { 
       mTitle.setTypingIndicatorMode(mTitle.MODE_ALT); 
      } 
     }); 

     if(typingIndicatorMode != mTitle.MODE_MULTITAP) 
     menu.add(new MenuItem("Multitap Mode", 0, 0) { 
      public void run() { 
       mTitle.setTypingIndicatorMode(mTitle.MODE_MULTITAP); 
      } 
     }); 

     if(typingIndicatorMode != mTitle.MODE_NUMLOCK) 
     menu.add(new MenuItem("NumLock Mode", 0, 0) { 
      public void run() { 
       mTitle.setTypingIndicatorMode(mTitle.MODE_NUMLOCK); 
      } 
     }); 

     if(typingIndicatorMode != mTitle.MODE_SHIFT) 
     menu.add(new MenuItem("Shift Mode", 0, 0) { 
      public void run() { 
       mTitle.setTypingIndicatorMode(mTitle.MODE_SHIFT); 
      } 
     }); 
    } 
}