OwnerDrawn CComboBoxEx

[cbpetro]

I want to owner draw a CComboBoxEx m_ctlCombo with text and images.
I create the image list and create COMBOBOXEXITEM and insert them into m_ctlCombo. It's all good.

		// Add strings to the combo box. 
		for (int idx = 0; idx < 3; idx++)
		{
			// Each item has text, an lParam with extra data, and an image.
			cbI.mask			= CBEIF_TEXT | CBEIF_IMAGE | CBEIF_SELECTEDIMAGE;		
			cbI.pszText			= _T("test");  // this will be different for each item
			cbI.cchTextMax		= sizeof(_T("test"));
			cbI.iItem			= idx;	// Add the item to the end of the list.
			cbI.iImage			= idx;	// Image to display.
			cbI.iSelectedImage	= idx;
			cbI.iOverlay		= 2;
			cbI.iIndent			= 0; 

			// Add the item to the combo box drop-down list.
			int test = m_ctlCombo.InsertItem(&cbI); // works!
		}

My question is how do I get the COMBOBOXEXITEM items in my ownerdrawn function from which I can extract the text "test" to draw.

   // COwnerDraw
	LRESULT DrawItem(UINT /*uMsg*/, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
	{
		LPDRAWITEMSTRUCT lpDrawItemStruct = (LPDRAWITEMSTRUCT) lParam;

		if( lpDrawItemStruct->itemID == -1 )
			return 0;

		CDCHandle dc = lpDrawItemStruct->hDC;

		const int nIndex = lpDrawItemStruct->itemID;
		COMBOBOXEXITEM cbei;
		GetItem(&cbei);          // this Does Not work to get items with text
		LPCTSTR lpszText = cbei.pszText; // How?

		RECT rc = lpDrawItemStruct->rcItem;   // this works to get rect
		CImageList pImageList = GetImageList();  // this works to get image list

     // ...
     // code to draw text and images
     // ...
}

I'm using WTL but I think it does not matter. TIA

[VictorN]

   // COwnerDraw
	LRESULT DrawItem(UINT /*uMsg*/, WPARAM wParam, LPARAM lParam, BOOL& /*bHandled*/)
	{
		LPDRAWITEMSTRUCT lpDrawItemStruct = (LPDRAWITEMSTRUCT) lParam;

		if( lpDrawItemStruct->itemID == -1 )
			return 0;

		CDCHandle dc = lpDrawItemStruct->hDC;

		const int nIndex = lpDrawItemStruct->itemID;
		COMBOBOXEXITEM cbei;
		GetItem(&cbei);          // this Does Not work to get items with text
		LPCTSTR lpszText = cbei.pszText; // How?

		RECT rc = lpDrawItemStruct->rcItem;   // this works to get rect
		CImageList pImageList = GetImageList();  // this works to get image list
}

Why don't you use DRAWITEMSTRUCT itemData to get the item text?
Have a look at the owner draw comobox example.

[cbpetro]

I'm working with the CComboBoxEx class which uses strings and images stored in COMBOBOXEXITEM items. The CComboBox class which you referenced just uses strings.

I want to be able to access the COMBOBOXEXITEMS in my owner draw function to get the images and strings which I inserted into my owner drawn control using ...

m_ctlCombo.InsertItem(&cbI)

[VictorN]

Again:
1. Did you try to use DRAWITEMSTRUCT itemData to get the item text?
2. Did you look at the owner draw combobox example from MSDN?

[cbpetro]

Yes, I checked out the MSDN example and tried...

		CDCHandle dc = lpDrawItemStruct->hDC;
//		COMBOBOXEXITEM cbei = (COMBOBOXEXITEM) lpDrawItemStruct->itemData;  // Won't compile
		LPCTSTR lpszText  = (LPCTSTR) lpDrawItemStruct->itemData;     // does't access strings - gives junk

I don't think that's the solution. I scoured the net for a solution/example and haven't found out how to do this. Thanks for your ideas.

[cbpetro]

I figured it out.

You have to 'prep' COMBOBOXEXITEM prior to calling GetITem.

		const int nIndex = lpDrawItemStruct->itemID;

		TCHAR tstr[20];

		COMBOBOXEXITEM cbei;
		ZeroMemory( &cbei, sizeof( COMBOBOXEXITEM ) );

		cbei.mask = CBEIF_TEXT;
		cbei.iItem = nIndex;
		cbei.pszText = tstr;
		cbei.cchTextMax = 20;

		GetItem(&cbei);   // now it works !
                                     // tstr is the assigned string