dropdown_helper.h

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#ifndef _DROPDOWN_HELPER_H_
#define _DROPDOWN_HELPER_H_


class cfg_dropdown_history
{
        enum {separator = '\n'};
        cfg_string data;
        unsigned max;
        void build_list(pfc::ptr_list_t<char> & out);
        void parse_list(const pfc::ptr_list_t<char> & src);
public:
        cfg_dropdown_history(const GUID & p_guid,unsigned p_max = 10,const char * init_vals = "") : data(p_guid,init_vals) {max = p_max;}
        void setup_dropdown(HWND wnd);
        void setup_dropdown(HWND wnd,UINT id) {setup_dropdown(GetDlgItem(wnd,id));}
        void add_item(const char * item);
        bool is_empty();
        void on_context(HWND wnd,LPARAM coords);
};

// ATL-compatible message map entry macro for installing dropdown list context menus.
#define DROPDOWN_HISTORY_HANDLER(ctrlID,var) \
        if(uMsg == WM_CONTEXTMENU) { \
                const HWND source = (HWND) wParam; \
                if (source != NULL && source == GetDlgItem(ctrlID)) { \
                        var.on_context(source,lParam);  \
                        lResult = 0;    \
                        return TRUE;    \
                }       \
        }

#endif //_DROPDOWN_HELPER_H_

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