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juce::ValueTreeSynchroniser Class Referenceabstract

#include <juce_ValueTreeSynchroniser.h>

Inheritance diagram for juce::ValueTreeSynchroniser:
juce::ValueTree::Listener

Public Member Functions

 ValueTreeSynchroniser (const ValueTree &tree)
 
 ~ValueTreeSynchroniser () override
 
virtual void stateChanged (const void *encodedChange, size_t encodedChangeSize)=0
 
void sendFullSyncCallback ()
 
const ValueTreegetRoot () noexcept
 

Static Public Member Functions

static bool applyChange (ValueTree &target, const void *encodedChangeData, size_t encodedChangeDataSize, UndoManager *undoManager)
 

Detailed Description

This class can be used to watch for all changes to the state of a ValueTree, and to convert them to a transmittable binary encoding.

The purpose of this class is to allow two or more ValueTrees to be remotely synchronised by transmitting encoded changes over some kind of transport mechanism.

To use it, you'll need to implement a subclass of ValueTreeSynchroniser and implement the stateChanged() method to transmit the encoded change (maybe via a network or other means) to a remote destination, where it can be applied to a target tree.

Definition at line 46 of file juce_ValueTreeSynchroniser.h.

Constructor & Destructor Documentation

◆ ValueTreeSynchroniser()

juce::ValueTreeSynchroniser::ValueTreeSynchroniser ( const ValueTree tree)

Creates a ValueTreeSynchroniser that watches the given tree.

After creating an instance of this class and somehow attaching it to a target tree, you probably want to call sendFullSyncCallback() to get them into a common starting state.

Definition at line 96 of file juce_ValueTreeSynchroniser.cpp.

◆ ~ValueTreeSynchroniser()

juce::ValueTreeSynchroniser::~ValueTreeSynchroniser ( )
override

Destructor.

Definition at line 101 of file juce_ValueTreeSynchroniser.cpp.

Member Function Documentation

◆ applyChange()

bool juce::ValueTreeSynchroniser::applyChange ( ValueTree target,
const void encodedChangeData,
size_t  encodedChangeDataSize,
UndoManager undoManager 
)
static

Applies an encoded change to the given destination tree.

When you implement a receiver for changes that were sent by the stateChanged() message, this is the function that you'll need to call to apply them to the target tree that you want to be synced.

Definition at line 162 of file juce_ValueTreeSynchroniser.cpp.

◆ getRoot()

const ValueTree & juce::ValueTreeSynchroniser::getRoot ( )
inlinenoexcept

Returns the root ValueTree that is being observed.

Definition at line 85 of file juce_ValueTreeSynchroniser.h.

◆ sendFullSyncCallback()

void juce::ValueTreeSynchroniser::sendFullSyncCallback ( )

Forces the sending of a full state message, which may be large, as it encodes the entire ValueTree.

This will internally invoke stateChanged() with the encoded version of the state.

Definition at line 106 of file juce_ValueTreeSynchroniser.cpp.

◆ stateChanged()

virtual void juce::ValueTreeSynchroniser::stateChanged ( const void encodedChange,
size_t  encodedChangeSize 
)
pure virtual

This callback happens when the ValueTree changes and the given state-change message needs to be applied to any other trees that need to stay in sync with it. The data is an opaque blob of binary that you should transmit to wherever your target tree lives, and use applyChange() to apply this to the target tree.

Referenced by sendFullSyncCallback().


The documentation for this class was generated from the following files: