/**
* This function sets the view data. Any changes between the old and the new data is applied as a
* diff in an efficient way.
*/
private synchronized void setData(Chat chat) {
if (!viewCreated.get()) {
return;
}
messageAdapter.setNotifyOnChange(false);
messageAdapter.clear();
messageAdapter.addAll(chat.messages);
messageAdapter.notifyDataSetChanged();
setSelection(messageAdapter.getCount() - 1);
Log.v(TAG, "updated view with: " + messageAdapter.getCount() + " messages");
// todo: implement in place updates as below as an optimization
// boolean notifyDataSetChanged = false;
//
// // apply changes to existing messages in case any of them was changed
// // diffing here is easy as we're always using immutable objects, we can just compare
// references to get changed ones
// for (int i = 0; i < messages.size(); i++) {
// if (messages.get(i) != chat.messages.get(i)) {
// // update the check mark on the updated item only as per:
// //
// http://stackoverflow.com/questions/3724874/how-can-i-update-a-single-row-in-a-listview
// View v = messageListView.getChildAt(location -
// messageListView.getFirstVisiblePosition());
// if (v != null) {
// if (msg.status == Message.Status.SENT_TO_SERVER) {
// ((TextView)v.findViewById(R.id.check)).setText("✓");
// }
// v.findViewById(R.id.check).setVisibility(View.VISIBLE);
// }
//
// }
// }
}
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
viewCreated.set(true);
setSelection(messageAdapter.getCount() - 1);
}
