1

我想在 Horizo​​ntalFieldManager 中添加两个标签字段，我想将两个标签显示为一个左对齐，另一个像这样右对齐

在此处输入图像描述

hfm1 = new HorizontalFieldManager(Manager.USE_ALL_WIDTH);
        hfm1.setMargin(10,0,10,0);
        l1 = new LabelField("Weight:");
        l2 = new LabelField("20");
        l1.setMargin(0,10,0,0);
        l2.setMargin(0,5,0,0);
        hfm1.add(l1);
        hfm1.add(l2);
4

3 回答 3

6

试试这个代码

LabelField labl1=new LabelField("weight");
LabelField labl2=new LabelField("20");
JustifiedHorizontalFieldManager JustifiedHorizontalFieldManager=new JustifiedHorizontalFieldManager(labl1,labl2,true);
add(JustifiedHorizontalFieldManager);

JustifiedHorizo​​ntalFieldManager 类如下 -

import net.rim.device.api.ui.Field;
import net.rim.device.api.ui.Manager;

public class JustifiedHorizontalFieldManager extends Manager
{
    private static final int SYSTEM_STYLE_SHIFT = 32;

    public Field _leftField;
    public Field _rightField;

    private boolean _giveLeftFieldPriority;

    public JustifiedHorizontalFieldManager( Field leftField, Field rightField, boolean giveLeftFieldPriority )
    {
        this( leftField, rightField, giveLeftFieldPriority, Field.USE_ALL_WIDTH );
    }

    public JustifiedHorizontalFieldManager( Field leftField, Field rightField, boolean giveLeftFieldPriority, long style )
    {
        super( style );

        _leftField = leftField;
        _rightField = rightField;

        add( _leftField );
        add( _rightField );

        _giveLeftFieldPriority = giveLeftFieldPriority;
    }

    public JustifiedHorizontalFieldManager( boolean giveLeftFieldPriority, long style )
    {
        super( style );
        _giveLeftFieldPriority = giveLeftFieldPriority;
    }

    public void addLeftField( Field field )
    {
        if( _leftField != null ) {
            throw new IllegalStateException();
        }
        _leftField = field;
        add( _leftField );
    }

    public void addRightField( Field field )
    {
        if( _rightField != null ) {
            throw new IllegalStateException();
        }
        _rightField = field;
        add( _rightField );
    }

    public int getPreferredWidth()
    {
        return _leftField.getPreferredWidth() + _rightField.getPreferredWidth();
    }

    public int getPreferredHeight()
    {
        return Math.max( _leftField.getPreferredHeight(), _rightField.getPreferredHeight() );
    }

    protected void sublayout( int width, int height )
    {
        Field firstField;
        Field secondField;
        if( _giveLeftFieldPriority ) {
            firstField = _leftField;
            secondField = _rightField;
        } else {
            firstField = _rightField;
            secondField = _leftField;
        }

        int maxHeight = 0;

        int availableWidth = width;
        availableWidth -= _leftField.getMarginLeft();
        availableWidth -= Math.max( _leftField.getMarginRight(), _rightField.getMarginLeft() );
        availableWidth -= _rightField.getMarginRight();

        layoutChild( firstField, availableWidth, height - firstField.getMarginTop() - firstField.getMarginBottom() );
        maxHeight = Math.max( maxHeight, firstField.getMarginTop() + firstField.getHeight() + firstField.getMarginBottom() );
        availableWidth -= firstField.getWidth();

        layoutChild( secondField, availableWidth, height - secondField.getMarginTop() - secondField.getMarginBottom() );
        maxHeight = Math.max( maxHeight, secondField.getMarginTop() + secondField.getHeight() + secondField.getMarginBottom() );
        availableWidth -= secondField.getWidth();

        if( !isStyle( Field.USE_ALL_HEIGHT ) ) {
            height = maxHeight;
        }
        if( !isStyle( Field.USE_ALL_WIDTH ) ) {
            width -= availableWidth;
        }

        setPositionChild( _leftField, _leftField.getMarginLeft(), getFieldY( _leftField, height ) );
        setPositionChild( _rightField, width - _rightField.getWidth() - _rightField.getMarginRight(), getFieldY( _rightField, height ) );

        setExtent( width, height );
    }

    private int getFieldY( Field field, int height )
    {
        switch( (int)( ( field.getStyle() & FIELD_VALIGN_MASK ) >> SYSTEM_STYLE_SHIFT ) ) {
            case (int)( FIELD_BOTTOM >> SYSTEM_STYLE_SHIFT ):
                return height - field.getHeight() - field.getMarginBottom();
            case (int)( FIELD_VCENTER >> SYSTEM_STYLE_SHIFT ):
                return field.getMarginTop() + ( height - field.getMarginTop() - field.getHeight() - field.getMarginBottom() ) / 2;
            default:
                return field.getMarginTop();
        }
    }


    public Field getLeftField()
    {
        return _leftField;
    }

    public Field getRightField()
    {
        return _rightField;
    }

    public void replace( Field oldField, Field newField )
    {
        if( oldField == newField ) {
            // Nothing to do
            return;
        }

        if( oldField == _leftField ) {
            _leftField = newField;
        } else if( oldField == _rightField ) {
            _rightField = newField;
        }
        add( newField );
        delete( oldField );
    }

}
于 2012-04-17T06:09:56.900 回答
5

恕我直言，最优雅的解决方案是

HorizontalFieldManager hfm = new HorizontalFieldManager(Manager.USE_ALL_WIDTH);
hfm.setMargin(10,0,10,0);

LabelField l1 = new LabelField("Weight:");
l1.setMargin(0,10,0,0);
hfm.add(l1);

VerticalFieldManager vfm = new VerticalFieldManager(Manager.USE_ALL_WIDTH);
LabelField l2 = new LabelField("20", Field.FIELD_RIGHT);
l2.setMargin(0,5,0,0);
vfm.add(l2);
hfm.add(vfm);

add(hfm);

和结果

在此处输入图像描述

于 2012-04-17T18:44:15.423 回答
0

另一种方法是，您可以使用两个标签制作一个自定义标签字段并将其添加到您想要的位置。就像

public class LableFieldWithTwoLable extends LabelField {

private final String lbl2;
private final String lbl1;

public LableFieldWithTwoLable(String lbl1,String lbl2) {
    super();
    this.lbl1 = lbl1;
    this.lbl2 = lbl2;
}


public int getPreferredWidth() {
        return super.getPreferredWidth();

}
protected void layout(int width, int height) {
    super.layout(width, height);
    setExtent(getPreferredWidth(), getPreferredHeight());
}

protected void paint(Graphics graphics) {
int ypos = getContentHeight()/2;
graphics.drawText(lbl1, 0, ypos ,DrawStyle.LEFT | DrawStyle.VCENTER);
graphics.drawText(lbl2, 0, ypos ,DrawStyle.RIGHT | DrawStyle.VCENTER);
super.paint(graphics);
}

}

现在您只需在经理中添加此标签字段，例如

HorizontalFieldManager hfm = new HorizontalFieldManager();
hfm.add(new LableFieldWithTwoLable("name","13") );

如果您想要任何其他功能，请根据需要在 LableFieldWithTwoLable() 类中添加构造函数。

于 2012-04-17T12:08:22.837 回答