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# tlp::PropertyObserver Class Reference [Properties] `#include <ObservableProperty.h>` Inherited by tlp::DoubleProperty, tlp::GraphProperty, tlp::IntegerProperty, tlp::LayoutProperty, and tlp::SizeProperty. Inheritance diagram for tlp::PropertyObserver: [legend] List of all members. ## Detailed Description Observer for Property. The Observer pattern is described in the lecture notes and pp293-304 of Design Patterns by Gamma, Helm, Johnson, and Vlissides. It is a framework for handling state dependency between observer and observed object. ## Public Member Functions PropertyObserver (bool manageObservables=true) virtual ~PropertyObserver () virtual void beforeSetNodeValue (PropertyInterface *, const node) virtual void afterSetNodeValue (PropertyInterface *, const node) virtual void beforeSetEdgeValue (PropertyInterface *, const edge) virtual void afterSetEdgeValue (PropertyInterface *, const edge) virtual void beforeSetAllNodeValue (PropertyInterface *) virtual void afterSetAllNodeValue (PropertyInterface *) virtual void beforeSetAllEdgeValue (PropertyInterface *) virtual void afterSetAllEdgeValue (PropertyInterface *) virtual void destroy (PropertyInterface *) void addObservable (ObservableProperty *) void removeObservable (ObservableProperty *) ## Constructor & Destructor Documentation
tlp::PropertyObserver::PropertyObserver | ( | bool | manageObservables = `true` | ) | `[inline]`
virtual tlp::PropertyObserver::~PropertyObserver | ( |  | ) | `[virtual]`
## Member Function Documentation
void tlp::PropertyObserver::addObservable | ( | ObservableProperty * |  | ) |
virtual void tlp::PropertyObserver::afterSetAllEdgeValue | ( | PropertyInterface * |  | ) | `[inline, virtual]`
virtual void tlp::PropertyObserver::afterSetAllNodeValue | ( | PropertyInterface * |  | ) | `[inline, virtual]`
| Reimplemented in tlp::GraphProperty.
virtual void tlp::PropertyObserver::afterSetEdgeValue | ( | PropertyInterface * | ,
|  | const | edge
| ) | `[inline, virtual]`
virtual void tlp::PropertyObserver::afterSetNodeValue | ( | PropertyInterface * | ,
|  | const node |
| ) | `[inline, virtual]`
| Reimplemented in tlp::GraphProperty.
virtual void tlp::PropertyObserver::beforeSetAllEdgeValue | ( | PropertyInterface * |  | ) | `[inline, virtual]`
| Reimplemented in tlp::DoubleProperty, tlp::IntegerProperty, tlp::LayoutProperty, and tlp::SizeProperty.
virtual void tlp::PropertyObserver::beforeSetAllNodeValue | ( | PropertyInterface * |  | ) | `[inline, virtual]`
| Reimplemented in tlp::DoubleProperty, tlp::GraphProperty, tlp::IntegerProperty, tlp::LayoutProperty, and tlp::SizeProperty.
virtual void tlp::PropertyObserver::beforeSetEdgeValue | ( | PropertyInterface * | ,
|  | const edge |
| ) | `[inline, virtual]`
| Reimplemented in tlp::DoubleProperty, tlp::IntegerProperty, tlp::LayoutProperty, and tlp::SizeProperty.
virtual void tlp::PropertyObserver::beforeSetNodeValue | ( | PropertyInterface * | ,
|  | const node |
| ) | `[inline, virtual]`
| Reimplemented in tlp::DoubleProperty, tlp::GraphProperty, tlp::IntegerProperty, tlp::LayoutProperty, and tlp::SizeProperty.
virtual void tlp::PropertyObserver::destroy | ( | PropertyInterface * |  | ) | `[inline, virtual]`
void tlp::PropertyObserver::removeObservable | ( | ObservableProperty * |  | ) |

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