To the original question:
You don't need all that complicated code to work. Rely on the BlackBerry primitives - they are written in the native code and are much more efficient at what they do, not to mention work well together.
So, you want a horizontally scrollable EditField which will never go to the second line on its own. Since Fields do not scroll by themselves (they might, but the documentation does not mention that, so assume they don't), you need something horizontally scrollable. Hey - isn't HorizontalFieldManager what you are looking for?
HorizontalFieldManager myHfm = new HorizontalFieldManager(HorizontalFieldManager.HORIZONTAL_SCROLL);
You may add HORIZONTAL_SCROLLBAR or NO_HORIZONTAL_SCROLLBAR if you like.
Now, since this Manager will let the fields inside have virtually infinite horizontal space (0x3FFFFFFF pixels), your EditField should never wrap on its own. So a regular EditField will do. Something like this:
EditField myEditField = new EditField("My label: ", "my initial text", EditField.DEFAULT_MAXCHARS, EditField.FOCUSABLE);
Add the edit field to your Manager and your Manager to your screen (or another Manager which will contain that)
myHfm.add(myEditField);
add(myHfm);
Isn't it simpler?
Of course, your label will scroll away if you type too many characters. If you want it to stay, move it out into a LabelField; create an additional, non-scrollable HorizontalFieldManager; add your LabelField and your scrollable HorizontalFieldManager to it; add your EditField to your scrollable HorizontalFieldManager; and finally, add your non-scrollable HorizontalFieldManager to your Screen.
That works like a charm, behaves much better on Storm devices (because RIM internal classes are supplied by the OS which has device-specific versions) and is overall faster and easier to debug.
Oh, one last thing: if you want your EditField to always be on one line, disable ENTER key processing (which inserts new line and re-layouts your EditField). Like this:
EditField myEditField = new EditField(...) {
protected boolean keyChar(char c, int status, int time) {
if (c == Characters.ENTER) {
return true;
}
return super.keyChar(c, status, time);
}
};
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