mirror of
https://github.com/nextcloud/talk-android
synced 2025-07-27 06:35:37 +01:00
8a316d94f5
Instead of explicitly calling "notifyDataSetChanged" after setting values on a ParticipantDisplayItem now the adapter observes all its items and calls "notifyDataSetChanged" automatically when any of them changes. Although this adds some boilerplate code it will make possible to update the ParticipantDisplayItems and automatically propagate the changes to the adapter when a model changes, rather than having to explicitly do it from the CallActivity. Signed-off-by: Daniel Calviño Sánchez <danxuliu@gmail.com>
56 lines
2.0 KiB
Java
56 lines
2.0 KiB
Java
/*
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* Nextcloud Talk application
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*
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* @author Daniel Calviño Sánchez
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* Copyright (C) 2022 Daniel Calviño Sánchez <danxuliu@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.nextcloud.talk.adapters;
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import com.nextcloud.talk.signaling.SignalingMessageReceiver;
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import java.util.ArrayList;
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import java.util.LinkedHashSet;
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import java.util.Set;
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/**
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* Helper class to register and notify ParticipantDisplayItem.Observers.
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*
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* This class is only meant for internal use by ParticipantDisplayItem; observers must register themselves against a
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* ParticipantDisplayItem rather than against a ParticipantDisplayItemNotifier.
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*/
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class ParticipantDisplayItemNotifier {
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private final Set<ParticipantDisplayItem.Observer> participantDisplayItemObservers = new LinkedHashSet<>();
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public synchronized void addObserver(ParticipantDisplayItem.Observer observer) {
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if (observer == null) {
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throw new IllegalArgumentException("ParticipantDisplayItem.Observer can not be null");
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}
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participantDisplayItemObservers.add(observer);
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}
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public synchronized void removeObserver(ParticipantDisplayItem.Observer observer) {
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participantDisplayItemObservers.remove(observer);
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}
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public synchronized void notifyChange() {
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for (ParticipantDisplayItem.Observer observer : new ArrayList<>(participantDisplayItemObservers)) {
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observer.onChange();
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}
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}
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}
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