blob: e4129c67b23e35541143addbfa39d2170b8d192a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
|
#include <vector>
class Observer
{
public:
virtual void update(double timestamp, double value) = 0;
};
class Subject
{
double timestamp_;
double value_;
std::vector<Observer*> m_views;
public:
void attach(Observer *obs)
{
m_views.push_back(obs);
}
void set_val(double timestamp, double value)
{
timestamp_ = timestamp;
value_ = value;
notify();
}
void notify()
{
for (int i = 0; i < m_views.size(); ++i)
m_views[i]->update(timestamp_, value_);
}
};
|
