/**
* Refreshes the content of the parent list view while maintaining the current vertical position
* in the list view.
*/
private void refreshListView(ViewGroup parent, Group updatedGroup) {
// Get position of first and last visible list items
AbsListView parentListView = (AbsListView) parent.findViewById(android.R.id.list);
int firstVisible = parentListView.getFirstVisiblePosition();
int lastVisible = parentListView.getLastVisiblePosition();
// Populate list view
mItems.clear();
List<Group> groups = Group.getAllSortedByDisplayOrder();
for (Group group : groups) {
mItems.add(group.name);
}
notifyDataSetChanged();
// Handle case where item is at visible top and moved up.
if (firstVisible >= updatedGroup.getDisplayOrder()) {
parentListView.setSelection(updatedGroup.getDisplayOrder() - 1);
// Handle case where item is at visible bottom and moved down.
} else if (lastVisible < updatedGroup.getDisplayOrder()) {
parentListView.setSelection(firstVisible + 1);
// Handle move cases in the middle of viewable listview.
} else {
parentListView.setSelection(firstVisible);
}
}
/** Sets up the buttons for changing the display order. TODO Replace with drag and drop handles */
private void setupMoveButtons(int position) {
// Stop buttons from preventing list item click event
mMoveDown.setFocusable(false);
mMoveDown.setFocusableInTouchMode(false);
mMoveUp.setFocusable(false);
mMoveUp.setFocusableInTouchMode(false);
// Disable move down buttons for first list items.
if (position == 0) {
mMoveUp.setEnabled(false);
mMoveUp.setVisibility(View.INVISIBLE);
}
// Disable move up button for last list item
int last = Group.getLast().getDisplayOrder();
if (position + 1 == last) {
mMoveDown.setEnabled(false);
mMoveDown.setVisibility(View.INVISIBLE);
if (last == 2) mMoveDown.setVisibility(View.GONE);
}
}
private void setupTextLabels(int position) {
mGroupName.setText(mItems.get(position));
// Hide default label for non-default groups
Group current = Group.getByDisplayOrder(position + 1);
if (!current.isDefault()) mDefaultGroup.setVisibility(View.GONE);
}