how to add any field to custom verticalfieldmanager in blackberry? -


my custom verticalfieldmanger

public class custom_topfield extends verticalfieldmanager { private static final int field_height = 70; private labelfield maintitle;  private string _text;  custom_topfield(int color, string text) {     super(manager.no_vertical_scroll);     _text = text;     background background = backgroundfactory.createsolidbackground(color);     setbackground(background);     maintitle = new labelfield(_text, field.field_vcenter | field.field_hcenter);     font font = font.getdefault().derive(font.bold, 35);     maintitle.setfont(font);     add(maintitle); }  protected void sublayout(int width, int height) {     width = math.min(width, getpreferredwidth());     height = math.min(height, getpreferredheight());     setextent(width, height); }  public int getpreferredheight() {     return field_height; }  public int getpreferredwidth() {     return display.getwidth(); }  public void paint(graphics graphics) {     int rectheight = getpreferredheight();     int rectwidth = getpreferredwidth();         graphics.drawrect(0, 0, rectwidth, rectheight);          super.paint(graphics); } }

although add(maintitle) did not come out middle of verticalfield.

you can try this:

add flags constructor:

super(manager.no_vertical_scroll | manager.use_all_width);

also field:

maintitle = new labelfield(drawstyle.hcenter | field.field_hcenter);

this should center horizontally field. can try adding flags center vertically, won't work, because vfm's have issues vertical scrolling. rule is: center horizontally, use verticalfieldmanager, center vertically, use horizontalfieldmanager. how can center in vertical:

    horizontalfieldmanager hfm = new horizontalfieldmanager(manager.use_all_height);     field tocenter = new <field>(drawstyle.vcenter | field.field_vcenter );     hfm.add(tocenter);

you theoretically work out solution combining both approaches, , nesting 1 manager inside other one.


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