OpenShot Audio Library | OpenShotAudio 0.3.2
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juce_ChangeBroadcaster.cpp
1/*
2 ==============================================================================
3
4 This file is part of the JUCE library.
5 Copyright (c) 2017 - ROLI Ltd.
6
7 JUCE is an open source library subject to commercial or open-source
8 licensing.
9
10 The code included in this file is provided under the terms of the ISC license
11 http://www.isc.org/downloads/software-support-policy/isc-license. Permission
12 To use, copy, modify, and/or distribute this software for any purpose with or
13 without fee is hereby granted provided that the above copyright notice and
14 this permission notice appear in all copies.
15
16 JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
17 EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
18 DISCLAIMED.
19
20 ==============================================================================
21*/
22
23namespace juce
24{
25
27{
28 broadcastCallback.owner = this;
29}
30
34
36{
37 // Listeners can only be safely added when the event thread is locked
38 // You can use a MessageManagerLock if you need to call this from another thread.
39 JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
40
41 changeListeners.add (listener);
42 anyListeners = true;
43}
44
46{
47 // Listeners can only be safely removed when the event thread is locked
48 // You can use a MessageManagerLock if you need to call this from another thread.
49 JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
50
51 changeListeners.remove (listener);
52 anyListeners = changeListeners.size() > 0;
53}
54
56{
57 // Listeners can only be safely removed when the event thread is locked
58 // You can use a MessageManagerLock if you need to call this from another thread.
59 JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
60
61 changeListeners.clear();
62 anyListeners = false;
63}
64
66{
67 if (anyListeners)
68 broadcastCallback.triggerAsyncUpdate();
69}
70
72{
73 // This can only be called by the event thread.
74 JUCE_ASSERT_MESSAGE_MANAGER_IS_LOCKED
75
76 broadcastCallback.cancelPendingUpdate();
77 callListeners();
78}
79
81{
82 broadcastCallback.handleUpdateNowIfNeeded();
83}
84
85void ChangeBroadcaster::callListeners()
86{
87 changeListeners.call ([this] (ChangeListener& l) { l.changeListenerCallback (this); });
88}
89
90//==============================================================================
91ChangeBroadcaster::ChangeBroadcasterCallback::ChangeBroadcasterCallback()
92 : owner (nullptr)
93{
94}
95
96void ChangeBroadcaster::ChangeBroadcasterCallback::handleAsyncUpdate()
97{
98 jassert (owner != nullptr);
99 owner->callListeners();
100}
101
102} // namespace juce
int size() const noexcept
Definition juce_Array.h:215
void remove(int indexToRemove)
Definition juce_Array.h:767
void add(const ElementType &newElement)
Definition juce_Array.h:418
void clear()
Definition juce_Array.h:188
void addChangeListener(ChangeListener *listener)
void removeChangeListener(ChangeListener *listener)