listview 样式 LVS_REPORT 与 LVS_EDITLABELS 编辑单元格时，当前行第一列内容不显示

今天想做一个可编辑单元格的 listview，样式是 LVS_REPORT 与 LVS_EDITLABELS

网上搜索了一些相关资料，照葫芦画瓢写了一个，可测试的时候发现，当从第2列开始编辑的时候，第1列的内容就显示不出来。

网上搜索了一下，有一个网友和我遇到的问题一样： https://stackoverflow.com/questions/8658128/subclassing-list-view-to-edit-only-its-subitems?rq=1

下面是他贴出来的代码：

WNDPROC     wpOrigEditProc;
RECT        rcSubItem;

LRESULT CALLBACK WndProcEditList(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    switch (uMsg) {
        case WM_WINDOWPOSCHANGING:
            {
                WINDOWPOS *pos = (WINDOWPOS*) lParam;

                pos->x  = rcSubItem.left; // 定位 listview 编辑框的位置
                pos->cx = rcSubItem.right;
            }
            break;
        default:
            return CallWindowProc(wpOrigEditProc, hWnd, uMsg, wParam, lParam);
    }
    return 1;
} 

LRESULT CALLBACK WndProcList(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    static HWND             hEdit;
    static RECT             rc;
    static LVITEM           lvI;
    static unsigned char    bEditing = 0;
    switch (uMsg) {
        case WM_NOTIFY:
            switch (((NMHDR*) lParam)->code) {
                case NM_CLICK:
                    lvI.iItem       = ((NMITEMACTIVATE*) lParam)->iItem;
                    lvI.iSubItem    = ((NMITEMACTIVATE*) lParam)->iSubItem;
                    break;
                case NM_DBLCLK:
                    SendMessage(hWnd, LVM_EDITLABEL, lvI.iItem, 0);
                    break;
                case LVN_BEGINLABELEDIT:
                    {
                        char    text[32];
                        bEditing        = 1;
                        hEdit           = (HWND) SendMessage(hWnd, LVM_GETEDITCONTROL, 0, 0);
                        rcSubItem.top   = lvI.iSubItem;
                        rcSubItem.left  = LVIR_LABEL;
                        SendMessage(hWnd, LVM_GETSUBITEMRECT, lvI.iItem, (long) &rcSubItem);
                        rcSubItem.right = SendMessage(hWnd, LVM_GETCOLUMNWIDTH, lvI.iSubItem, 0);
                        wpOrigEditProc  = (WNDPROC) SetWindowLong(hEdit, GWL_WNDPROC, (long) WndProcEditList);
                        lvI.pszText     = text;
                        lvI.cchTextMax  = 32;
                        SendMessage(hWnd, LVM_GETITEMTEXT, lvI.iItem, (long) &lvI);
                        SetWindowText(hEdit, lvI.pszText);
                    }
                    break;
                case LVN_ENDLABELEDIT:
                    bEditing = 0;
                    SetWindowLong(hEdit, GWL_WNDPROC, (long) wpOrigEditProc);
                    if (!lvI.iSubItem) return 1;
                    lvI.pszText = ((NMLVDISPINFO*) lParam)->item.pszText;
                    if (!lvI.pszText) return 1;
                    SendMessage(hWnd, LVM_SETITEMTEXT, lvI.iItem, (long) &lvI);
                    break;
                default:
                    return CallWindowProc((WNDPROC) GetClassLong(hWnd, GCL_WNDPROC), hWnd, uMsg, wParam, lParam);
            }
            break;
        case WM_PAINT:
            if (bEditing) {
                RECT rcItem;
                if (lvI.iSubItem > 0) {
                    rcItem.left = LVIR_LABEL;
                    if (SendMessage(hWnd, LVM_GETITEMRECT, lvI.iItem, (long) &rcItem))
                        ValidateRect(hWnd, &rcItem);
                }
            }
        default:
            return CallWindowProc((WNDPROC) GetClassLong(hWnd, GCL_WNDPROC), hWnd, uMsg, wParam, lParam);
    }
    return 0;
}

LRESULT CALLBACK WndProcMain(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    static HWND hList;
    static RECT rc;
    switch (uMsg) {
        case WM_NOTIFY:
            switch (((NMHDR*) lParam)->code) {
                case NM_CLICK:
                case NM_DBLCLK:
                case LVN_BEGINLABELEDIT:
                case LVN_ENDLABELEDIT:
                    return CallWindowProc(WndProcList, ((NMHDR*) lParam)->hwndFrom, uMsg, wParam, lParam);
            }
            break;
        case WM_CREATE:
            {
                LVCOLUMN        lvc;
                LVITEM          lvI;
                unsigned int    i;
                float           vertex;
                char            text[32];

                hList = CreateWindow(WC_LISTVIEW, 0, WS_CHILD | WS_VISIBLE | LVS_REPORT | LVS_EDITLABELS, rc.left, rc.top, rc.right, rc.bottom, hWnd, 0, hInstance, 0);
                SendMessage(hList, LVM_SETEXTENDEDLISTVIEWSTYLE, 0, LVS_EX_FULLROWSELECT | LVS_EX_GRIDLINES);
                SetWindowLong(hList, GWL_WNDPROC, (long) WndProcList);

                lvc.mask    = LVCF_WIDTH;
                lvc.cx      = 30;
                SendMessage(hList, LVM_INSERTCOLUMN, 0, (LPARAM) &lvc);

                lvc.mask    = LVCF_TEXT;
                lvc.pszText = "Vertex";
                SendMessage(hList, LVM_INSERTCOLUMN, 1, (LPARAM) &lvc);
                SendMessage(hList, LVM_SETCOLUMNWIDTH, 1, LVSCW_AUTOSIZE_USEHEADER);

                lvI.mask    = LVIF_TEXT;
                lvI.pszText = text;

                for (i = 0; i < 10; i++) {
                    vertex = (float) i;
                    lvI.iItem       = i;
                    lvI.iSubItem    = 0;    
                    sprintf(text, "%d", i);
                    SendMessage(hList, LVM_INSERTITEM, 0, (LPARAM) &lvI);
                    lvI.iSubItem    = 1;    
                    sprintf(text, "%f, %f, %f", vertex - 1, vertex, vertex + 1);
                    SendMessage(hList, LVM_SETITEM, 0, (LPARAM) &lvI);
                }
            }
            break;
        case WM_SIZE:
            GetClientRect(hWnd, &rc);
            MoveWindow(hList, rc.left, rc.top, rc.right, rc.bottom, 1);
            SendMessage(hList, LVM_SETCOLUMNWIDTH, 1, LVSCW_AUTOSIZE_USEHEADER);
            break;
        case WM_DESTROY:
            PostQuitMessage(0);
            break;
        default:
            return DefWindowProc(hWnd, uMsg, wParam, lParam);
    }
    return 0;
}

 

至于为什么当编辑第2,3,... 列时，当前行的第1列的内容不显示的原因，我还是没找到。

不过我找到了一个解决办法： 就是给 listview 添加一个空白列, 宽度设置为 0

lvc.mask = LVCF_TEXT | LVCF_WIDTH | LVCF_FMT;

lvc.pszText = "";
lvc.cx = 0; //宽度设置为 0
lvc.fmt = LVCFMT_CENTER;

这也是不是办法的办法了，反正我没有更好的解决方案。