黑莓在水平管理器焦點上改變子域的顏色

Question

我有一個由editfield，下拉菜單，標籤和一個按鈕組成的水平管理器陣列。我將所有這些水平域管理器放在一個垂直管理器中，以製作一個像網格一樣的表格。我可以做到，但如果我們專注於水平管理器，那麼我想這樣做，那麼橫向經理中的所有組件都應該給出相同的顏色，我不知道如何做到這一點。

Answer 1

如果在4.5和更低，延長Horizo​​ntalFieldManager，添加顏色屬性，使用油漆事件和無效的焦點變化：

class Scr extends MainScreen { 
HorizontalFieldManager mMainPanel; 
VerticalFieldManager mVerticalPanel; 

public Scr() { 
    mMainPanel = new HorizontalFieldManager(); 
    add(mMainPanel); 

    mVerticalPanel = new VerticalFieldManager(USE_ALL_HEIGHT 
    | USE_ALL_WIDTH); 
    mMainPanel.add(mVerticalPanel); 
    for (int i = 0; i < 5; i++) { 
    HFMHighlight hfm = new HFMHighlight(); 
    hfm.setHightlightColor(Color.GRAY); 
    hfm.add(new LabelField("Label " + i, FIELD_LEFT)); 
    hfm.add(new BasicEditField(FIELD_RIGHT)); 
    mVerticalPanel.add(hfm); 
    } 
} 
} 

class HFMHighlight extends HorizontalFieldManager { 

int mHColor = -1; 

public void setHightlightColor(int color) { 
    mHColor = color; 
} 

protected void onFocus(int direction) { 
    invalidate(); 
    super.onFocus(direction); 
} 

protected void onUnfocus() { 
    invalidate(); 
    super.onUnfocus(); 
} 

public void paint(Graphics graphics) { 
    if (-1 != mHColor && isFocus()) { 
    graphics.setBackgroundColor(mHColor); 
    graphics.clear(); 
    } 
    super.paint(graphics); 
} 
} 

如果您在4.6及更高版本，使用的setBackground爲可視狀態FOCUS：

class Scr extends MainScreen { 
    HorizontalFieldManager mMainPanel; 
    VerticalFieldManager mVerticalPanel; 

    public Scr() { 
     RadioInfo.isDataServiceOperational(); 
     CoverageInfo.isOutOfCoverage(); 
     WLANInfo.getWLANState(); 

     mMainPanel = new HorizontalFieldManager(); 
     add(mMainPanel); 
     mVerticalPanel = new VerticalFieldManager(USE_ALL_HEIGHT 
       | USE_ALL_WIDTH); 
     mMainPanel.add(mVerticalPanel); 
     for (int i = 0; i < 5; i++) { 
      HFMHighlight hfm = new HFMHighlight(Color.GRAY); 
      hfm.add(new LabelField("Label " + i, FIELD_LEFT)); 
      hfm.add(new BasicEditField(FIELD_RIGHT)); 
      mVerticalPanel.add(hfm); 
     } 
    } 
} 

class HFMHighlight extends HorizontalFieldManager { 

    public HFMHighlight(int color) { 
     Background focusedBG = BackgroundFactory.createSolidBackground(color); 
     setBackground(VISUAL_STATE_FOCUS, focusedBG); 
    } 

    protected void onFocus(int direction) { 
     invalidate(); 
     super.onFocus(direction); 
    } 

    protected void onUnfocus() { 
     invalidate(); 
     super.onUnfocus(); 
    } 
} 

這裏是如果你想突出，如果水平經理集中所有控件（按鈕，複選框，選擇和編輯）的情況下：

class Scr extends MainScreen { 
    HorizontalFieldManager mMainPanel; 
    VerticalFieldManager mVerticalPanel; 

    public Scr() { 
     mMainPanel = new HorizontalFieldManager(); 
     add(mMainPanel); 
     mVerticalPanel = new VerticalFieldManager(USE_ALL_HEIGHT 
       | USE_ALL_WIDTH); 
     mMainPanel.add(mVerticalPanel); 
     for (int i = 0; i < 5; i++) { 
      HHorizontalFieldManager hfm = new HHorizontalFieldManager(); 
      mVerticalPanel.add(hfm); 
      HButtonField button = new HButtonField("btn"); 
      button.setHightlightColor(Color.GRAY); 
      hfm.add(button); 
      HCheckboxField checkbox = new HCheckboxField("chk box", false); 
      checkbox.setHightlightColor(Color.GRAY); 
      hfm.add(checkbox); 
      String choiceItems[] = { "one", "two", "three" }; 
      HObjectChoiceField dropdown = new HObjectChoiceField("choice", 
        choiceItems); 
      dropdown.setHightlightColor(Color.GRAY); 
      hfm.add(dropdown);   
      HEditField edit = new HEditField("edit", "___"); 
      edit.setHightlightColor(Color.GRAY); 
      hfm.add(edit); 
     } 
    } 
} 

class HHorizontalFieldManager extends HorizontalFieldManager { 
    public HHorizontalFieldManager() { 
     super(); 
    } 

    public HHorizontalFieldManager(long style) { 
     super(style); 
    } 

    protected void onFocus(int direction) { 
     invalidate(); 
     super.onFocus(direction); 
    } 

    protected void onUnfocus() { 
     invalidate(); 
     super.onUnfocus(); 
    } 

    public void paint(Graphics graphics) { 
     if (isFocus()) { 
      graphics.setBackgroundColor(Color.GRAY); 
      graphics.clear(); 
     } 
     super.paint(graphics); 
    } 
} 

class HEditField extends EditField { 

    public HEditField() { 
     super(); 
    } 

    public HEditField(long style) { 
     super(style); 
    } 

    public HEditField(String label, String initialValue, int maxNumChars, 
      long style) { 
     super(label, initialValue, maxNumChars, style); 
    } 

    public HEditField(String label, String initialValue) { 
     super(label, initialValue); 
    } 

    private int mHColor = -1; 

    public void setHightlightColor(int color) { 
     mHColor = color; 
    } 

    protected void onFocus(int direction) { 
     invalidate(); 
     super.onFocus(direction); 
    } 

    protected void onUnfocus() { 
     invalidate(); 
     super.onUnfocus(); 
    } 

    public void paint(Graphics graphics) { 
     if (-1 != mHColor && getManager().isFocus()) { 
      graphics.setBackgroundColor(mHColor); 
      graphics.clear(); 
     } 
     super.paint(graphics); 
    } 
} 

class HButtonField extends ButtonField { 

    public HButtonField() { 
     super(); 
    } 

    public HButtonField(long style) { 
     super(style); 
    } 

    public HButtonField(String label, long style) { 
     super(label, style); 
    } 

    public HButtonField(String label) { 
     super(label); 
    } 

    private int mHColor = -1; 

    public void setHightlightColor(int color) { 
     mHColor = color; 
    } 

    protected void onFocus(int direction) { 
     invalidate(); 
     super.onFocus(direction); 
    } 

    protected void onUnfocus() { 
     invalidate(); 
     super.onUnfocus(); 
    } 

    public void paint(Graphics graphics) { 
     if (-1 != mHColor && getManager().isFocus()) { 
      graphics.setBackgroundColor(mHColor); 
      graphics.clear(); 
     } 
     super.paint(graphics); 
    } 
} 

class HCheckboxField extends CheckboxField { 

    public HCheckboxField() { 
     super(); 
    } 

    public HCheckboxField(String label, boolean checked, long style) { 
     super(label, checked, style); 
    } 

    public HCheckboxField(String label, boolean checked) { 
     super(label, checked); 
    } 

    private int mHColor = -1; 

    public void setHightlightColor(int color) { 
     mHColor = color; 
    } 

    protected void onFocus(int direction) { 
     invalidate(); 
     super.onFocus(direction); 
    } 

    protected void onUnfocus() { 
     invalidate(); 
     super.onUnfocus(); 
    } 

    public void paint(Graphics graphics) { 
     if (-1 != mHColor && getManager().isFocus()) { 
      graphics.setBackgroundColor(mHColor); 
      graphics.clear(); 
     } 
     super.paint(graphics); 
    } 
} 

class HObjectChoiceField extends ObjectChoiceField { 
    public HObjectChoiceField() { 
     super(); 
    } 

    public HObjectChoiceField(String label, Object[] choices, 
     int initialIndex, long style) { 
     super(label, choices, initialIndex, style); 
    } 

    public HObjectChoiceField(String label, Object[] choices, 
      int initialIndex) { 
     super(label, choices, initialIndex); 
    } 

    public HObjectChoiceField(String label, Object[] choices, 
      Object initialObject) { 
     super(label, choices, initialObject); 
    } 

    public HObjectChoiceField(String label, Object[] choices) { 
     super(label, choices); 
    } 

    private int mHColor = -1; 

    public void setHightlightColor(int color) { 
     mHColor = color; 
    } 

    protected void onFocus(int direction) { 
     invalidate(); 
     super.onFocus(direction); 
    } 

    protected void onUnfocus() { 
     invalidate(); 
     super.onUnfocus(); 
    } 

    public void paint(Graphics graphics) { 
     if (-1 != mHColor && getManager().isFocus()) { 
      graphics.setBackgroundColor(mHColor); 
      graphics.clear(); 
     } 
     super.paint(graphics); 
    } 
}