Troubleshooting guide

29
1: Creating UIs
Create custom layout managers
Task Steps
Create a custom layout manager. > Extend the Manager class or one of its subclasses.
class DiagonalManager extends Manager {
public DiagonalManager(long style){
super(style);
}
...
}
Return a preferred field width. >Override getPreferredWidth() so that it returns the preferred field width for the manager.
public int getPreferredWidth() {
int width = 0;
int numberOfFields = getFieldCount();
for (int i=0; i<numberOfFields; ++i) {
width += getField(i).getPreferredWidth();
}
return width;
}
Organize more than one TextField or
Manager object.
> Override the respective getPreferredWidth() methods for the TextField or Manager
objects.
Organize multiple TextFields
horizontally.
>Override layout().
Return a preferred field height. >Override getPreferredHeight() so that it returns the preferred field height for the
manager.
public int getPreferredHeight() {
int height = 0;
int numberOfFields = getFieldCount();
for (int i=0; i<numberOfFields; ++i) {
height += getField(i).getPreferredHeight();
}
return height;
}