A Read-Only Combo with Selectable Text

#ifndef ReadOnlyComboHandler_h
#define ReadOnlyComboHandler_h 1

/*-----------------------------------------------------------------------
| ReadOnlyComboHandler.h: a plug-in handler to make a combo read-only.
|
| Version 1.1 20 November 2004. 
| - Converted combo class into handler, added support for drop-list type
| Version 1.2 24 November 2004. 
| - Subsumed combo edit class functionality into handler.
| - Added notification for parent of changed HWND
| - Fixed minor bug with border in XP
| Version 1.3
| - Altered combo arrow drawing to simply mask arrow when read-only.
| - Figured out a much easier (and more accurate) way to get the arrow
|	 dimensions (duh!).
| - Added "drop-list" mode to implement drop-list combos with drop-down 
|   combos and thus allow selection.
|
| Copyright David Pritchard 2005. davidpritchard@ctv.es
|
| You can use this class freely, but please keep my ego happy 
| by leaving this comment in place.
|
------------------------------------------------------------------------*/

#define NEW_READONLY_COMBO

static LRESULT CALLBACK		NewComboProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam);
static LRESULT CALLBACK		NewComboEditProc ( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam );


class CReadOnlyComboHandler 
{
  public:
      CReadOnlyComboHandler();

      virtual ~CReadOnlyComboHandler();

      bool Init (IN const HWND hWndCombo);
      void SetReadOnly (IN const bool bReadOnly);
      void OnNcDestroy (WPARAM wParam, LPARAM lParam);
      void OnPaint (WPARAM wParam, LPARAM lParam);
      void OnPrint (WPARAM wParam, LPARAM lParam);
      WNDPROC GetOldWndProc ();
      WNDPROC GetOldEditWndProc ();
      void OnNcDestroyComboEdit (WPARAM wParam, LPARAM lParam);
      void OnKeyDownInEdit (UINT message,WPARAM wParam, LPARAM lParam);
      void OnClipboardEdit (UINT message,WPARAM wParam, LPARAM lParam);
      bool IsReadOnly ();
      bool SubclassComboEdit (IN CEdit* pWndEdit);
      bool UnsubclassComboEdit (IN CEdit* pWndEdit);
      bool UnhookEditProc ();
      bool HookEditProc ();
		int  GetEditHeight();
		void SetDropListMode(IN const bool bSet);

	  void OnLeftClick(UINT message,WPARAM wParam,LPARAM lParam);

  protected:

      void DrawDisabledDropArrow (CDC* pDC);
      bool FindAndStoreComboEdit ();
      HWND GetComboEditWindow ();
      HWND GetComboChildWindowFromClass (IN LPCTSTR sClassName);
      bool HasEditControl ();
      bool RemoveCustomEditWndProc ();
      bool RemoveCustomComboWndProc ();
      bool AttachCustomEditWndProc ();
      bool AttachCustomComboWndProc ();
      CRect GetComboArrowRect ();
      void MaskComboArrow (CDC& dc);

  private:
//      CComboBox* m_pCombo;
      HWND		m_hWndCombo;
      WNDPROC	m_wndProcOld;
      WNDPROC	m_wndProcEditOld;
      HWND		m_hWndEdit;
      bool		m_bReadOnly;
		bool		m_bDropListMode;

  private:
};

#endif