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107 lines (84 loc) · 2.27 KB
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/********************************************************************
created: 2006/07/20
filename: Composite.cpp
author: 李创
http://www.cppblog.com/converse/
purpose: Composite模式的演示代码
*********************************************************************/
#include "Composite.h"
#include <iostream>
#include <algorithm>
/*-------------------------------------------------------------------
Component成员函数的实现
-------------------------------------------------------------------*/
void Component::Add(Component* pChild)
{
}
void Component::Remove(Component* pChild)
{
}
Component* Component::GetChild(int nIndex)
{
return NULL;
}
/*-------------------------------------------------------------------
Leaf成员函数的实现
-------------------------------------------------------------------*/
void Leaf::Operation()
{
std::cout << "Operation by leaf\n";
}
/*-------------------------------------------------------------------
Composite成员函数的实现
-------------------------------------------------------------------*/
Composite::~Composite()
{
std::list<Component*>::iterator iter1, iter2, temp;
for (iter1 = m_ListOfComponent.begin(), iter2 = m_ListOfComponent.end();
iter1 != iter2;
)
{
temp = iter1;
++iter1;
delete (*temp);
}
}
void Composite::Add(Component* pChild)
{
m_ListOfComponent.push_back(pChild);
}
void Composite::Remove(Component* pChild)
{
std::list<Component*>::iterator iter;
iter = find(m_ListOfComponent.begin(), m_ListOfComponent.end(), pChild);
if (m_ListOfComponent.end() != iter)
{
m_ListOfComponent.erase(iter);
}
}
Component* Composite::GetChild(int nIndex)
{
if (nIndex <= 0 || nIndex > m_ListOfComponent.size())
return NULL;
std::list<Component*>::iterator iter1, iter2;
int i;
for (i = 1, iter1 = m_ListOfComponent.begin(), iter2 = m_ListOfComponent.end();
iter1 != iter2;
++iter1, ++i)
{
if (i == nIndex)
break;
}
return *iter1;
}
void Composite::Operation()
{
std::cout << "Operation by Composite\n";
std::list<Component*>::iterator iter1, iter2;
for (iter1 = m_ListOfComponent.begin(), iter2 = m_ListOfComponent.end();
iter1 != iter2;
++iter1)
{
(*iter1)->Operation();
}
}