Re: ccombobox

I would do something like the code below.  It simply uses CContainedWindowT to subclass the edit control and process it's messages in the message map of the parent (the combobox).



class CComboView : public CWindowImpl<CComboView, CComboBox>
{
	CContainedWindowT<CEdit> m_Edit;
public:
	============================================================
	CComboView() : m_Edit(this, 1)
	{
	}
	============================================================
	~CComboView()
	{
	}
	
protected:
	BEGIN_MSG_MAP(CComboView)
		MSG_WM_CREATE(OnCreate)
		ALT_MSG_MAP(1) // edit control
			MSG_WM_CHAR(OnEditChar)
		REFLECT_NOTIFICATIONS()
	END_MSG_MAP()
	
	============================================================
	LRESULT OnCreate(LPCREATESTRUCT /*lpCreateStruct*/)
	{
		HWND hwndEdit = GetDlgItem(1001);
		if(hwndEdit == NULL)
		{
			CPoint pt(::GetSystemMetrics(SM_CXFIXEDFRAME), ::GetSystemMetrics(SM_CYFIXEDFRAME));
			hwndEdit = ChildWindowFromPoint(pt);
		}
		ATLASSERT(hwndEdit != NULL);
		ATLVERIFY(m_Edit.SubclassWindow(hwndEdit));
                return 0;
	}
	============================================================
	LRESULT OnChar(TCHAR ch, UINT /*cRepeat*/, UINT /*flags*/)
	{
		switch(ch){
			case _T('\r'):
			// process when the enter key is pressed, return 0 if processed message
		}
		SetMsgHandled(FALSE);
                return 0;
	}
};

--- In [email protected], "jan702189" <stetka@...> wrote:
>
> The problem I'm having with the following code is that I can't enter any text into the edit control. CComboView.Create(...) is called from my app.
> 
> 
> WNDPROC lpfnEditWndProc; // original wndproc for the combo box 
> // Prototypes
> LRESULT CALLBACK SubClassProc( HWND, UINT, WPARAM, LPARAM );
> 
> 
> template< class T, class TBase = CWindow, class TWinTraits = CControlWinTraits >
> class ATL_NO_VTABLE CComboImpl : 
>    public CWindowImpl< T, TBase, TWinTraits >
> 
> {
> public:
> 	CComboBox ctl;
> 
> 
> 	BEGIN_MSG_MAP(CComboView)	
> 	
> 		MESSAGE_HANDLER(WM_CREATE, OnCreate)
> END_MSG_MAP()
> 
>    LRESULT OnCreate(UINT /*uMsg*/, WPARAM /*wParam*/, LPARAM /*lParam*/, BOOL&
> /*bHandled*/)
> 	{
> 
> 		//ModifyStyle(WS_CLIPCHILDREN, SS_NOTIFY);
> 		
> 		RECT rfc;
> 	rfc.bottom=200;
> 	rfc.left=rfc.top=0;
> 	rfc.right=800;
> 		ctl.Create(m_hWnd, rfc, NULL, WS_CHILD | WS_VISIBLE|CBS_DROPDOWN);
> 	
> 	lpfnEditWndProc = (WNDPROC) ::SetWindowLong(hEdit, 
>                 GWL_WNDPROC, (DWORD) SubClassProc); 
> 
> 	return 0;
> 	}
> 
> };
> 
> 
> class CComboView : public CComboImpl<CComboView>
> {
> public:
> 	//DECLARE_WND_SUPERCLASS(NULL, CComboBox::GetWndClassName())
> 	//DECLARE_WND_CLASS(NULL)
> 	BEGIN_MSG_MAP(CComboView)
> 			CHAIN_MSG_MAP(CComboImpl<CComboView>);
> 	END_MSG_MAP()
> };
> LRESULT CALLBACK SubClassProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam) 
> { 		
>     switch (msg) 
>     {         
> 		case WM_CHAR: 
> 			//{
> 				
>             switch (wParam) 
>             { 
> 
>                 case VK_RETURN: 
> 
> 					/*TODO: work out what to do with combobox text*/
>                     return 0; 
>             }
> 			//}
>     } 
>  
>     // Call the original window procedure for default processing. 
>  
>     return CallWindowProc(lpfnEditWndProc, hwnd, 
>         msg, wParam, lParam); 
> }
>



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