如何同步ListView的checkbox和selection？(WIN32)

Question

我正在编写一个简单的 Win32 程序，它有一个带有复选框和启用多行选择的 ListView。 :

复选框检查和行选择似乎是两种截然不同的行为。有没有一种方法可以同步这两种行为，只要选中一个复选框，就会选中该行，而只要选中一行，就会选中相应的复选框？

Answer 1

"whenever a row is selected, the corresponding checkbox will be checked"

选中 WM_NOTIFY and LVIS_SELECTED flag to detect when user selects a row. And use ListView_SetCheckState 以选中复选框：

BOOL CALLBACK DialogProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    static HWND hListView;
    switch (msg)
    {
    case WM_INITDIALOG:
        hListView = GetDlgItem(hWnd, IDC_LIST1);
        break;

    case WM_NOTIFY:
    {
        NMHDR* header = (NMHDR*)lParam;
        NMLISTVIEW* nmlist = (NMLISTVIEW*)lParam;
        if (header && header->idFrom == IDC_LIST1 && header->code == LVN_ITEMCHANGED)
            if (nmlist->uNewState & LVIS_SELECTED)
                ListView_SetCheckState(hListView, nmlist->iItem, 1);
        break;
    }
    ...
}

"whenever a check box is checked that row will be selected"

检查 WM_NOTIFY 和 LVIS_STATEIMAGEMASK 标志以检测复选框何时被选中，然后使用 ListView_SetItemState 到 select 该行。

这也可能导致递归调用，因为我们更改行以响应复选框，我们更改复选框以响应行 selection。使用 busy 变量停止递归调用。

case WM_NOTIFY:
    if (lParam)
    {
        NMHDR* header = (NMHDR*)lParam;
        NMLISTVIEW* nmlist = (NMLISTVIEW*)lParam;

        //use `busy` as a flag to prevent recursive calls:
        static BOOL busy = FALSE;
        if (!busy && header->hwndFrom == hListView && header->code == LVN_ITEMCHANGED)
        {
            busy = TRUE;
            if (nmlist->uNewState & LVIS_SELECTED)
            {
                //row has been selected => check the checkbox
                ListView_SetCheckState(hListView, nmlist->iItem, 1);
            }
            else if (nmlist->uNewState & LVIS_STATEIMAGEMASK)
            {
                //checkbox has been changed => select/unselect the row
                BOOL checked = ListView_GetCheckState(hListView, nmlist->iItem);
                ListView_SetItemState(hListView, nmlist->iItem,
                     checked ? LVIS_SELECTED : 0, LVIS_SELECTED);
            }
            busy = FALSE;
        }
    }
    break;

如何同步ListView的checkbox和selection？(WIN32)

How to sync ListView checkbox with selection?(WIN32)

c

windows

winapi

listview

win32gui