BlackBerry custom button field -2

final class CustomButtonField extends Field {

 private int backgroundColor = Color.LIGHTGREY;
 private int backgroundBorder = Color.LIGHTGREY;
 private int textColor=Color.CORNFLOWERBLUE;
 // Focus color of the button
 private int color;
 // Field width and height are calculated
 private int fieldWidth;
 private int fieldHeight;
 // Text to be displayed in the button
 private String text;
 private int padding = 15;
 private int arc = 20;
 //width - ratio of screen width
 public static final int SCREEN_WIDTH=1;
 public  static  final int ONE_THIRD_SCREEN_WIDTH=2;
 public  static final int TWO_THIRD_SCREEN_WIDTH=3;
 public  static  final int THREE_FOURTH_SCREEN_WIDTH=4;
 public  static  final int HALF_SCREEN_WIDTH=5;

public CustomButtonField(String label, int color) {
 super(Field.FOCUSABLE | Field.FIELD_HCENTER);
 // Text on the button
 text = label;
 this.color = color;
 Font defaultFont = Font.getDefault();

// Height and width of the field
 fieldHeight = defaultFont.getHeight() + padding;
 fieldWidth = defaultFont.getAdvance(text) + (padding * 2);
 this.setPadding(2, 2, 2, 2);
 }
 public CustomButtonField(String label, int color, long style)
 {
 super(Field.FOCUSABLE | style);
 // Text on the button
 text = label;
 this.color = color;
 Font defaultFont = Font.getDefault();

// Height and width of the field
 fieldHeight = defaultFont.getHeight() + padding;
 fieldWidth = defaultFont.getAdvance(text) + (padding * 2);
 this.setPadding(2, 2, 2, 2);
 }
 //newly added
 public CustomButtonField(String label, int color,int maxWidthScreenRatio)
 {
 super(Field.FOCUSABLE | Field.FIELD_HCENTER);
 // Text on the button
 text = label;
 this.color = color;
 Font defaultFont = Font.getDefault();
 this.setPadding(2, 2, 2, 2);
 // Height and width of the field
 fieldHeight = defaultFont.getHeight() + padding;
 //fieldWidth = defaultFont.getAdvance(text) + (padding * 2);
 switch(maxWidthScreenRatio)
 {
 case SCREEN_WIDTH:
 //left-right margin
 fieldWidth = Display.getWidth()-10*2;
 break;
 case ONE_THIRD_SCREEN_WIDTH:
 //fieldWidth = ((Graphics.getScreenWidth() * 1) / 3)+ (padding * 2);
 fieldWidth = ((Display.getWidth() * 1) / 3)+ (padding * 2);
 break;
 case TWO_THIRD_SCREEN_WIDTH:
 //fieldWidth = ((Graphics.getScreenWidth() * 2) / 3)+ (padding * 2);
 fieldWidth = ((Display.getWidth() * 2) / 3)+ (padding * 2);
 break;
 case THREE_FOURTH_SCREEN_WIDTH:
 fieldWidth = ((Display.getWidth() * 3) / 4) + (padding * 2);
 break;
 case HALF_SCREEN_WIDTH:
 //fieldWidth = (Graphics.getScreenWidth()  / 2) - (padding * 2);
 fieldWidth = (Display.getWidth()  / 2) - (padding * 2);
 break;
 default:
 fieldWidth = defaultFont.getAdvance(text) + (padding * 2);
 }

}
 protected void onFocus(int direction) {
 // Color set
 backgroundColor = color;
 textColor = Color.WHITE;
 invalidate();
 super.onFocus(direction);
 }

protected void onUnfocus() {
 // Color set to dim gray
 backgroundColor = Color.LIGHTGREY;
 textColor = Color.CORNFLOWERBLUE;
 invalidate();
 super.onUnfocus();
 }

protected boolean navigationClick(int status, int time) {
 // Field change notify
 fieldChangeNotify(1);
 return false;
 }

public int getPreferredWidth() {
 return fieldWidth;
 }

public int getPreferredHeight()
 {
 return fieldHeight;
 }

protected void layout(int arg0, int arg1) {
 setExtent(getPreferredWidth(), getPreferredHeight());
 }

protected void drawFocus(Graphics graphics, boolean on) {
 }

protected void fieldChangeNotify(int context) {
 try
 {
 // Alert the change listener
 this.getChangeListener().fieldChanged(this, context);
 }
 catch (Exception e)
 {
 System.out.println("CustomButton.fieldChangeNotify():ex - "+ e.getMessage());
 }
 }

protected void paint(Graphics graphics) {
 graphics.setColor(backgroundBorder);
 // Fill a white rectangle
 graphics.fillRoundRect(0, 0, fieldWidth, fieldHeight, arc, arc);
 // Draw a white rectangle - (this will give a white ring like effect)
 graphics.drawRoundRect(0, 0, fieldWidth, fieldHeight, arc, arc);
 graphics.setColor(backgroundColor);
 // Fill with the background color
 graphics.fillRoundRect(1, 1, fieldWidth-2, fieldHeight-2, arc, arc);
 //
 graphics.setColor(textColor);
 graphics.setFont(graphics.getFont().derive(Font.BOLD));
 //graphics.drawText(text, padding - 1, padding / 2 - 1);
 int x = (fieldWidth/2)-(graphics.getFont().getAdvance(text)/2);
 graphics.drawText(text, x , padding/2-1);
 }
 }//end of class