c++ - C++中工厂方法模式的使用

Question

我正在寻找在 C++ 中使用工厂方法模式的实际示例。是否有任何源代码示例可以很好地说明。

Answer 1

我喜欢 Codeproject 教授的内容:

http://www.codeproject.com/KB/architecture/FactoryPattBasics.aspx

class CUIFrameWork 
{
public:
    // Instead of hard coding we write factory methods which
    // perform the task of object creation.
    virtual CDataComponent* MakeDataComp()
    {
        return new CDataComponent(); 
    }

    virtual CUIComponent* MakeUIComp()
    {
        return new CUIComponent();
    } 

    virtual CToolBarComponent* MakeToolBarComp( UINT nID )
    {
        return new CToolBarComponent( nID );
    } 

    CUITemplate* CreateUI()
    {
        CDataComponent* pData = MakeDataComp();
        CUIComponent* pUI = MakeUIComp();
        CToolBarComponent* pTooBar1 = MakeToolBarComp( ID_STANDARD );
        CToolBarComponent* pTooBar2 = MakeToolBarComp( ID_CUSTOM );
        pTooBar2->AddDropDownButton();
        pTooBar2->AddComboBox();

        pUI->AddToolBar(pTooBar1);
        pUI->AddToolBar(pTooBar2);

        return new CUITemplate( pData, pUI );
    }
};