这次是一个简单的问题，但我没有在搜索中看到：我有一个列表视图控件，状态图像应显示在一列中。在wine，Windows Vista，Windows 7和Windows 8.1中，事情看起来是正确的。但在Windows XP中，状态图像不会显示，只显示图像所在的空白区域。需要Common Controls版本6。我做错了什么？
以下是演示此内容的示例程序。
// 17 august 2014
// scratch Windows program by pietro gagliardi 17 april 2014
// fixed typos and added toWideString() 1 may 2014
// borrows code from the scratch GTK+ program (16-17 april 2014) and from code written 31 march 2014 and 11-12 april 2014
#define _UNICODE
#define UNICODE
#define STRICT
#define _GNU_SOURCE // needed to declare asprintf()/vasprintf()
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <windows.h>
#include <commctrl.h> // needed for InitCommonControlsEx() (thanks Xeek in irc.freenode.net/#winapi for confirming)
#ifdef _MSC_VER
#error sorry! the scratch windows program relies on mingw-only functionality! (specifically: asprintf())
#endif
HMODULE hInstance;
HICON hDefaultIcon;
HCURSOR hDefaultCursor;
HFONT controlfont;
void panic(char *fmt, ...);
TCHAR *toWideString(char *what);
void init(void);
LRESULT CALLBACK wndproc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
NMHDR *nmhdr = (NMHDR *) lparam;
NMLVDISPINFOW *fill = (NMLVDISPINFO *) lparam;
switch (msg) {
case WM_NOTIFY:
if (nmhdr->code == LVN_GETDISPINFO) {
if (fill->item.iSubItem == 0) {
fill->item.state = INDEXTOSTATEIMAGEMASK(fill->item.iItem + 1);
fill->item.stateMask = LVIS_STATEIMAGEMASK;
} else
fill->item.pszText = L"No State Image Here";
return 0;
}
return DefWindowProc(hwnd, msg, wparam, lparam);
case WM_CLOSE:
PostQuitMessage(0);
return 0;
default:
return DefWindowProc(hwnd, msg, wparam, lparam);
}
panic("oops: message %ud does not return anything; bug in wndproc()", msg);
}
HWND makeMainWindow(void)
{
WNDCLASS cls;
HWND hwnd;
ZeroMemory(&cls, sizeof (WNDCLASS));
cls.lpszClassName = L"mainwin";
cls.lpfnWndProc = wndproc;
cls.hInstance = hInstance;
cls.hIcon = hDefaultIcon;
cls.hCursor = hDefaultCursor;
cls.hbrBackground = (HBRUSH) (COLOR_BTNFACE + 1);
if (RegisterClass(&cls) == 0)
panic("error registering window class");
hwnd = CreateWindowEx(0,
L"mainwin", L"Main Window",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
300, 300,
NULL, NULL, hInstance, NULL);
if (hwnd == NULL)
panic("opening main window failed");
return hwnd;
}
void buildUI(HWND mainwin)
{
#define CSTYLE (WS_CHILD | WS_VISIBLE)
#define CXSTYLE (0)
#define SETFONT(hwnd) SendMessage(hwnd, WM_SETFONT, (WPARAM) controlfont, (LPARAM) TRUE);
HWND lv;
LVCOLUMN column;
HIMAGELIST imglist;
lv = CreateWindowEx(WS_EX_CLIENTEDGE | CXSTYLE,
WC_LISTVIEW, L"",
LVS_REPORT | LVS_OWNERDATA | LVS_NOSORTHEADER | LVS_SHOWSELALWAYS | WS_HSCROLL | WS_VSCROLL | WS_TABSTOP | CSTYLE,
10, 10, 250, 250,
mainwin, (HMENU) 100, hInstance, NULL);
if (lv == NULL)
panic("error making list view");
SETFONT(lv);
SendMessageW(lv, LVM_SETEXTENDEDLISTVIEWSTYLE,
LVS_EX_FULLROWSELECT | LVS_EX_SUBITEMIMAGES,
LVS_EX_FULLROWSELECT | LVS_EX_SUBITEMIMAGES);
// error checking elided from this point to where otherwise noted
imglist = ImageList_Create(
GetSystemMetrics(SM_CXSMICON),
GetSystemMetrics(SM_CYSMICON),
ILC_COLOR32, 20, 20);
ImageList_AddIcon(imglist, LoadIconW(NULL, IDI_ERROR));
ImageList_AddIcon(imglist, LoadIconW(NULL, IDI_QUESTION));
ImageList_AddIcon(imglist, LoadIconW(NULL, IDI_WARNING));
SendMessageW(lv, LVM_SETIMAGELIST, LVSIL_STATE, (LPARAM) imglist);
ZeroMemory(&column, sizeof (LVCOLUMN));
column.mask = LVCF_FMT | LVCF_TEXT | LVCF_SUBITEM | LVCF_ORDER;
column.fmt = LVCFMT_LEFT;
column.pszText = L"State Image";
column.iSubItem = 0;
column.iOrder = 0;
SendMessageW(lv, LVM_INSERTCOLUMN, 0, (LPARAM) (&column));
ZeroMemory(&column, sizeof (LVCOLUMN));
column.mask = LVCF_FMT | LVCF_TEXT | LVCF_SUBITEM | LVCF_ORDER;
column.fmt = LVCFMT_LEFT;
column.pszText = L"No State Image";
column.iSubItem = 1;
column.iOrder = 1;
SendMessageW(lv, LVM_INSERTCOLUMN, 1, (LPARAM) (&column));
// end of error eliding
if (SendMessageW(lv, LVM_SETITEMCOUNT, 3, 0) == 0)
panic("error setting number of items in list view");
}
void firstShowWindow(HWND hwnd);
int main(void)
{
HWND mainwin;
MSG msg;
init();
mainwin = makeMainWindow();
buildUI(mainwin);
firstShowWindow(mainwin);
for (;;) {
BOOL gmret;
gmret = GetMessage(&msg, NULL, 0, 0);
if (gmret == -1)
panic("error getting message");
if (gmret == 0)
break;
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}
DWORD iccFlags =
// ICC_ANIMATE_CLASS | // animation control
// ICC_BAR_CLASSES | // toolbar, statusbar, trackbar, tooltip
// ICC_COOL_CLASSES | // rebar
// ICC_DATE_CLASSES | // date and time picker
// ICC_HOTKEY_CLASS | // hot key
// ICC_INTERNET_CLASSES | // IP address entry field
// ICC_LINK_CLASS | // hyperlink
ICC_LISTVIEW_CLASSES | // list-view, header
// ICC_NATIVEFNTCTL_CLASS | // native font
// ICC_PAGESCROLLER_CLASS | // pager
// ICC_PROGRESS_CLASS | // progress bar
// ICC_STANDARD_CLASSES | // "one of the intrinsic User32 control classes"
// ICC_TAB_CLASSES | // tab, tooltip
// ICC_TREEVIEW_CLASSES | // tree-view, tooltip
// ICC_UPDOWN_CLASS | // up-down
// ICC_USEREX_CLASSES | // ComboBoxEx
// ICC_WIN95_CLASSES | // some of the above
0;
void init(void)
{
INITCOMMONCONTROLSEX icc;
NONCLIENTMETRICS ncm;
hInstance = GetModuleHandle(NULL);
if (hInstance == NULL)
panic("error getting hInstance");
hDefaultIcon = LoadIcon(NULL, MAKEINTRESOURCE(IDI_APPLICATION));
if (hDefaultIcon == NULL)
panic("error getting default window class icon");
hDefaultCursor = LoadCursor(NULL, MAKEINTRESOURCE(IDC_ARROW));
if (hDefaultCursor == NULL)
panic("error getting default window cursor");
icc.dwSize = sizeof (INITCOMMONCONTROLSEX);
icc.dwICC = iccFlags;
if (InitCommonControlsEx(&icc) == FALSE)
panic("error initializing Common Controls");
ncm.cbSize = sizeof (NONCLIENTMETRICS);
if (SystemParametersInfo(SPI_GETNONCLIENTMETRICS,
sizeof (NONCLIENTMETRICS), &ncm, 0) == 0)
panic("error getting non-client metrics for getting control font");
controlfont = CreateFontIndirect(&ncm.lfMessageFont);
if (controlfont == NULL)
panic("error getting control font");
}
void panic(char *fmt, ...)
{
char *msg;
TCHAR *lerrmsg;
char *fullmsg;
va_list arg;
DWORD lasterr;
DWORD lerrsuccess;
lasterr = GetLastError();
va_start(arg, fmt);
if (vasprintf(&msg, fmt, arg) == -1) {
fprintf(stderr, "critical error: vasprintf() failed in panic() preparing panic message; fmt = \"%s\"\n", fmt);
abort();
}
// according to http://msdn.microsoft.com/en-us/library/windows/desktop/ms680582%28v=vs.85%29.aspx
lerrsuccess = FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, lasterr,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lerrmsg, 0, NULL);
if (lerrsuccess == 0) {
fprintf(stderr, "critical error: FormatMessage() failed in panic() preparing GetLastError() string; panic message = \"%s\", last error in panic(): %ld, last error from FormatMessage(): %ld\n", msg, lasterr, GetLastError());
abort();
}
// note to self: use %ws instead of %S (thanks jon_y in irc.oftc.net/#mingw-w64)
if (asprintf(&fullmsg, "panic: %s\nlast error: %ws\n", msg, lerrmsg) == -1) {
fprintf(stderr, "critical error: asprintf() failed in panic() preparing full report; panic message = \"%s\", last error message: \"%ws\"\n", msg, lerrmsg);
abort();
}
fprintf(stderr, "%s\n", fullmsg);
va_end(arg);
exit(1);
}
void firstShowWindow(HWND hwnd)
{
// we need to get nCmdShow
int nCmdShow;
STARTUPINFO si;
nCmdShow = SW_SHOWDEFAULT;
GetStartupInfo(&si);
if ((si.dwFlags & STARTF_USESHOWWINDOW) != 0)
nCmdShow = si.wShowWindow;
ShowWindow(hwnd, nCmdShow);
if (UpdateWindow(hwnd) == 0)
panic("UpdateWindow(hwnd) failed in first show");
}
TCHAR *toWideString(char *what)
{
TCHAR *buf;
int n;
size_t len;
len = strlen(what);
if (len == 0) {
buf = (TCHAR *) malloc(sizeof (TCHAR));
if (buf == NULL)
goto mallocfail;
buf[0] = L'\0';
} else {
n = MultiByteToWideChar(CP_UTF8, 0, what, -1, NULL, 0);
if (n == 0)
panic("error getting number of bytes to convert \"%s\" to UTF-16", what);
buf = (TCHAR *) malloc((n + 1) * sizeof (TCHAR));
if (buf == NULL)
goto mallocfail;
if (MultiByteToWideChar(CP_UTF8, 0, what, -1, buf, n) == 0)
panic("erorr converting \"%s\" to UTF-16", what);
}
return buf;
mallocfail:
panic("error allocating memory for UTF-16 version of \"%s\"", what);
}
答案 0 :(得分：1)
listview控件使用LVM_SETCALLBACKMASK通过LVN_GETDISPINFO将其作为请求项状态数据。
我只能猜测，在Windows 7及更高版本中，对于所有者数据控件已删除此要求 - 文档不会说 - 但在XP / Vista中，您需要发送此消息以使其具有请求项状态。< / p>