dropdown_helper.h

Go to the documentation of this file.

#ifdef _WIN32

#ifndef _DROPDOWN_HELPER_H_
#define _DROPDOWN_HELPER_H_

class _cfg_dropdown_history_base
{
    const unsigned m_max;
    void build_list(pfc::ptr_list_t<char> & out);
    void parse_list(const pfc::ptr_list_t<char> & src);
public:
    enum {separator = '\n'};
    virtual void set_state(const char * val) = 0;
    virtual void get_state(pfc::string_base & out) const = 0;
    _cfg_dropdown_history_base(unsigned p_max) : m_max(p_max) {}
    void on_init(HWND ctrl, const char * initVal) {
        add_item(initVal); setup_dropdown(ctrl); uSetWindowText(ctrl, initVal);
    }
    void setup_dropdown(HWND wnd);
    void setup_dropdown(HWND wnd,UINT id) {setup_dropdown(GetDlgItem(wnd,id));}
    bool add_item(const char * item); //returns true when the content has changed, false when not (the item was already on the list)
    bool add_item(const char * item, HWND combobox); //immediately adds the item to the combobox
    bool is_empty();
    bool on_context(HWND wnd,LPARAM coords); //returns true when the content has changed
};

class cfg_dropdown_history : public _cfg_dropdown_history_base {
public:
    cfg_dropdown_history(const GUID & p_guid,unsigned p_max = 10,const char * init_vals = "") : _cfg_dropdown_history_base(p_max), m_state(p_guid, init_vals) {}
    void set_state(const char * val) {m_state = val;}
    void get_state(pfc::string_base & out) const {out = m_state;}
private:
    cfg_string m_state;
};

class cfg_dropdown_history_mt : public _cfg_dropdown_history_base {
public:
    cfg_dropdown_history_mt(const GUID & p_guid,unsigned p_max = 10,const char * init_vals = "") : _cfg_dropdown_history_base(p_max), m_state(p_guid, init_vals) {}
    void set_state(const char * val) {m_state.set(val);}
    void get_state(pfc::string_base & out) const {m_state.get(out);}
private:
    cfg_string_mt m_state;
};

// 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 == CWindow(hWnd).GetDlgItem(ctrlID)) { \
            var.on_context(source,lParam);  \
            lResult = 0;    \
            return TRUE;    \
        }   \
    }

#endif //_DROPDOWN_HELPER_H_

#endif // _WIN32