Blackberry 1 picture extreme left and 1 button extreme right - layout

Question

I'm making a blackberry app, I just want to know how can I align the buttons in such a way that 1 is extreme right and the picture is extreme left. I have tried horizontal manager but it's not supporting Field.Field_RIGHT and Field.Field_Left.

Answer 1

try this-
HorizontalFieldManager hfm=new HorizontalFieldManager(FIELD_HCENTER);
ButtonField left=new ButtonField("Left");
ButtonField right=new ButtonField("Right");
JustifiedHorizontalFieldManager j=new JustifiedHorizontalFieldManager(left,right, true);
hfm.add(j);
add(hfm);
The JustifiedHorizontalFieldManager class is given below -
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 );
}
}

Answer 2

Even simpler if you want:
yourHorizontalFieldManager.add(leftButton);
rightButton.setPosition(Display.getWidth()-leftButton.getPrefferedWidth()-rightButton.getPreferredWidth());
yourHorizontalFieldManager.add(rightButton);
See also this