---
name: "tlp_Observable"
section: "3tulip"
platform: "linux"
package: "tulip-doc"
version: "3.1.2-2.3"
release: "Debian 6.0 (Squeeze)"
platforms: ["linux"]
url: "https://new.carta.tech/tlp_Observable"
---

# tlp\_Observable(3tulip)

## NAME

tlp::Observable -

## SYNOPSIS

`#include <Observable.h>`

Inherited by **tlp::ColorScale**, **tlp::Graph**, and **tlp::PropertyInterface**.

### Public Member Functions

virtual **~Observable** ()\
 void **addObserver** (**Observer** \*)\
 unsigned int **countObservers** ()\
 void **removeObserver** (**Observer** \*)\
 void **removeObservers** ()\
 void **notifyObservers** ()\
 void **notifyDestroy** ()\

### Static Public Member Functions

static void **holdObservers** ()\
 static void **unholdObservers** ()\

### Protected Attributes

stdext::slist\< **Observer** \* \> **observersList**\

### Static Protected Attributes

static int **holdCounter**\
 static **ObserverMap** **holdMap**\

## Detailed Description

All instances of that class can be observed by by an instance of the **Observer** class.

## Constructor & Destructor Documentation

### virtual tlp::Observable::~Observable ()` [inline, virtual]`

## Member Function Documentation

### void tlp::Observable::addObserver (Observer \* obs)` [inline]` Register a new observer

### unsigned int tlp::Observable::countObservers ()` [inline]` Returns the number of observers

### static void tlp::Observable::holdObservers ()` [static]` Queue notifications

### void tlp::Observable::notifyDestroy () Notify all the observers that the object will be destroyed. Need to be call into the dstructor of the observable.

### void tlp::Observable::notifyObservers () Notify all the observers

### void tlp::Observable::removeObserver (Observer \* item)` [inline]` Remove an observer

### void tlp::Observable::removeObservers ()` [inline]` Remove all observers

### static void tlp::Observable::unholdObservers ()` [static]` UnQueue notifications

## Member Data Documentation

### int tlp::Observable::holdCounter` [static, protected]`

### ObserverMap tlp::Observable::holdMap` [static, protected]`

### stdext::slist\<Observer\*\> tlp::Observable::observersList` [protected]`

## Author

Generated automatically by Doxygen for Tulip Graph Library from the source code.