Dynamically creating controls in MFC (Collection question)

I have some custom control inside of which i should create radiobuttons or checkboxes. The count of child controls is available only at runtime (it loads some file from which it gets this count). So i need to create variable number of controls. Which collection i should use for this purpose?

Solution 1: simply use std::vector<HWND> (or CArray<HWND>) - not suitable because i want use MFC (CButton). Of course i can Attach() and later Detach() handle to window each time i need this window, but it will give big overhead.

Solution 2: use std::vector<CButton*> or CArray<CButton*> or CList<CButton*> or... In this case i take care about making 'new' and appropriate 'delete' when control is unneeded. I am forgetful :)

MFC handle map contains pointer to CButton and i can't use simple CArray<CButton>, because it will move my objects each time when his size will grow.

... and the question is: Which collection i should开发者_JS百科 use for containing variable count of MFC control classes?

If you only want to read your file with the Count parameter, create your buttons, work with them and later delete them all then CArray<CButton*> is fine in my opinion. To make sure the buttons get deleted you could wrap the CArray into a helper like:

class CMyButtonArrayWrapper
{
public:
    CMyButtonArrayWrapper();
    virtual ~CMyButtonArrayWrapper();

    void ClearArray();
    void Add(CButton* theButton);

private:
    CArray<CButton*> m_Array;
}

CMyButtonArrayWrapper::CMyButtonArrayWrapper()
{
}

CMyButtonArrayWrapper::~CMyButtonArrayWrapper()
{
    ClearArray();
}

void CMyButtonArrayWrapper::ClearArray()
{
    for (int i=0; i<m_Array.GetSize(); i++)
    {
        CButton* aButton=m_Array.GetAt(i);
        if (aButton)
            delete aButton;
    }
    m_Array.RemoveAll();
}

void CMyButtonArrayWrapper::Add(CButton* theButton)
{
    m_Array.Add(theButton);
}

Then add an object of this class as a member to your custom control (m_MyButtonArrayWrapper) and add your buttons with:

CButton* aButton=new CButton;
aButton->Create( ... );
m_MyButtonArrayWrapper.Add(aButton);

If you need to add and remove buttons randomly a CList might be better suited for performance reasons. (But you won't probably notice a performance difference using InsertAt/RemoveAt of CArray, except your UI has several thousands of buttons. I guess this would be more an artwork than a user interface :))