/**
* Construct a preference screen corresponding to a configured parser category
*
* @param parserCategory parser category
* @param screen preference screen being set up
* @param multi true if we are setting up a mutiple location selection menu
* @param locMgr Location manager
*/
private void buildLocationMenu(
ParserCategory parserCategory,
PreferenceScreen screen,
boolean multi,
LocationManager locMgr) {
for (ParserEntry entry : parserCategory.getParserList()) {
if (!entry.isCategory())
throw new RuntimeException(
"Top level parser entry " + entry.getParserName() + " must be a category");
Preference pref = buildLocationItem(entry.getCategory(), screen, multi, locMgr);
screen.addPreference(pref);
}
}
/**
* Construct a prefence item corresponding to a single parser entry
*
* @param category root preference category
* @param parent parent preference screen
* @param multi true if we are setting up multiple location selection menu
* @param locMgr location manager
* @return constructed preference
*/
private Preference buildLocationItem(
ParserCategory category, PreferenceScreen parent, boolean multi, LocationManager locMgr) {
// Current rules are that category must contain only subcategory or only parser entries. See
// which this is
String catName = category.getName();
ParserEntry[] entries = category.getParserList();
boolean subcat = false;
boolean plist = false;
for (ParserEntry entry : entries) {
if (entry.isCategory()) subcat = true;
else plist = true;
}
if (subcat && plist)
throw new RuntimeException("Parser group " + catName + " mixes parser and category entries");
if (!subcat && !plist) throw new RuntimeException("Parser group " + catName + " is empty");
// If it only contains subcategories, build a new preference screen with them
if (subcat) {
PreferenceScreen sub = getPreferenceManager().createPreferenceScreen(this);
sub.setTitle(catName);
buildLocationMenu(category, sub, multi, locMgr);
return sub;
}
// Otherwise we are handing a parser list
// What we do next depends on whether this is a single or multiple selection menu
// If we are doing multiple selections, create a new preference screen and fill it
// a location checkbox for each parser entry
if (multi) {
PreferenceScreen sub = getPreferenceManager().createPreferenceScreen(this);
sub.setTitle(catName);
for (ParserEntry entry : entries) {
sub.addPreference(
new LocationCheckBoxPreference(
this, entry.getParserName(), stripStateAbbrv(entry.getLocName()), locMgr));
}
return sub;
}
// If we are doing single location selections, build a list preference
// that can select from any of the parsers in this category
LocationListPreference list = new LocationListPreference(this, locMgr, parent);
list.setTitle(catName);
list.setDialogTitle(catName);
String[] values = new String[entries.length];
String[] names = new String[entries.length];
for (int ndx = 0; ndx < entries.length; ndx++) {
ParserEntry entry = entries[ndx];
values[ndx] = entry.getParserName();
names[ndx] = stripStateAbbrv(entry.getLocName());
}
list.setEntryValues(values);
list.setEntries(names);
return list;
}