Thread: std::sort and listview_sortitems

  1. #1
    Registered User
    Join Date
    Oct 2005

    std::sort and listview_sortitems

    Ok, i have a list view control that holds data like, artist names, music names, etc... and i have a std::vector<std::string>, that holds all the paths for the files that have X artist name or X music name. When, i sort the listview, std::vector canīt sort itself. So i tryed std::sort, but when i did that, i realized that i was sorting the name of the paths, not the name of the paths according (donīt know how to write this in english) to their respective artist names or music names. What could i do?

    int CALLBACK ListViewCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
    	cString String;
    	static WCHAR szBuf1[50], szBuf2[50];
    	ListView_GetItemText(Cont.ContainerhWnd, lParam1, lParamSort, szBuf1, sizeof(szBuf1));
    	ListView_GetItemText(Cont.ContainerhWnd, lParam2, lParamSort, szBuf2, sizeof(szBuf2));
    	return(strcmp(String.ToMultibyte(szBuf1, CP_ACP,0).c_str(), String.ToMultibyte(szBuf2, CP_ACP,0).c_str()));//DESCENDING ORDER
    Thank you

  2. #2
    Yes, my avatar is stolen anonytmouse's Avatar
    Join Date
    Dec 2002
    Firstly, ListView_SortItemsEx must be used rather than ListView_SortItems.

    And the function can look something like:
    #include <wchar.h> /* Need this for wcscmp, could also use lstrcmp from windows.h */
    int CALLBACK ListViewCompareProc(LPARAM lParam1, LPARAM lParam2, LPARAM lParamSort)
    	WCHAR szBuf1[50], szBuf2[50]; /* No need for static */
    	/* Get the text of the two items. Note that buffer size is in characters, not bytes. */
    	ListView_GetItemText(Cont.ContainerhWnd, lParam1, lParamSort, szBuf1, sizeof(szBuf1) / sizeof(szBuf1[0]);
    	ListView_GetItemText(Cont.ContainerhWnd, lParam2, lParamSort, szBuf2, sizeof(szBuf2) / sizeof(szBuf2[0]);
    	return wcscmp(szBuf1, szBuf2);//DESCENDING ORDER

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