JUCE: Value::ValueSource Class Reference

JUCE

Public Member Functions | Protected Attributes | List of all members
Value::ValueSource Class Referenceabstract
juce_data_structures » values

Used internally by the Value class as the base class for its shared value objects. More...

`#include <juce_Value.h>`

Inheritance diagram for Value::ValueSource:

## Public Member Functions
| ValueSource ()
| ~ValueSource () override
virtual var | getValue () const =0
| Returns the current value of this object. More...
virtual void | setValue (const var &newValue)=0
| Changes the current value. More...
void | sendChangeMessage (bool dispatchSynchronously)
| Delivers a change message to all the listeners that are registered with this value. More...
Public Member Functions inherited from ReferenceCountedObject
void | incReferenceCount () noexcept
| Increments the object's reference count. More...
void | decReferenceCount () noexcept
| Decreases the object's reference count. More...
bool | decReferenceCountWithoutDeleting () noexcept
| Decreases the object's reference count. More...
int | getReferenceCount () const noexcept
| Returns the object's current reference count. More...

## Protected Attributes
SortedSet< Value * > | valuesWithListeners

## Additional Inherited Members
Protected Member Functions inherited from ReferenceCountedObject
| ReferenceCountedObject ()=default
| Creates the reference-counted object (with an initial ref count of zero). More...
| ReferenceCountedObject (const ReferenceCountedObject &) noexcept
| Copying from another object does not affect this one's reference-count. More...
| ReferenceCountedObject (ReferenceCountedObject &&) noexcept
| Copying from another object does not affect this one's reference-count. More...
ReferenceCountedObject & | operator= (const ReferenceCountedObject &) noexcept
| Copying from another object does not affect this one's reference-count. More...
ReferenceCountedObject & | operator= (ReferenceCountedObject &&) noexcept
| Copying from another object does not affect this one's reference-count. More...
virtual | ~ReferenceCountedObject ()
| Destructor. More...
void | resetReferenceCount () noexcept
| Resets the reference count to zero without deleting the object. More...

## Detailed Description

Used internally by the Value class as the base class for its shared value objects.

The Value class is essentially a reference-counted pointer to a shared instance of a ValueSource object. If you're feeling adventurous, you can create your own custom ValueSource classes to allow Value objects to represent your own custom data items.

## Constructor & Destructor Documentation

## ◆ ValueSource()

Value::ValueSource::ValueSource | ( |  | ) |

## ◆ ~ValueSource()

Value::ValueSource::~ValueSource | ( |  | ) |
| override

## Member Function Documentation

## ◆ getValue()

virtual var Value::ValueSource::getValue | ( |  | ) | const
| pure virtual

Returns the current value of this object.

## ◆ setValue()

virtual void Value::ValueSource::setValue | ( | const var & | newValue | ) |
| pure virtual

Changes the current value.

This must also trigger a change message if the value actually changes.

## ◆ sendChangeMessage()

void Value::ValueSource::sendChangeMessage | ( | bool | dispatchSynchronously | ) |

Delivers a change message to all the listeners that are registered with this value.

If dispatchSynchronously is true, the method will call all the listeners before returning; otherwise it'll dispatch a message and make the call later.

## Member Data Documentation

## ◆ valuesWithListeners

SortedSet<Value*> Value::ValueSource::valuesWithListeners
| protected

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

- juce_Value.h