使用 Qt5 在 Windows 上获取 HWND(来自 WId)

2021-12-09 00:00:00 windows user-interface qt5 qt c++

我正在尝试将 Qt4 应用程序转换为 Qt5.我唯一想不通的是如何获得小部件的HWND.该程序使用 EcWin7 在 win 7+ 的任务栏图标上显示进度，但需要 HWND.将 Q_WS_WIN 更改为 Q_OS_WIN 后，lib 本身似乎可以正常编译)在 Windows 上的 Qt4 中，WId 只是 HWND 的 typedef，所以这没问题.在 Qt5 中，情况不再如此.我发现了一些 邮件列表发布 可以提供线索，但它似乎 QPlatformNativeInterface 不再是 Qt5 公共 API 的一部分.

I am trying to convert a Qt4 Application to Qt5. The only thing I couldn't figure out is how to get the HWND of a Widget. The program uses EcWin7 to show the progress on the taskbar icon on win 7+ but expects a HWND. The lib itself seems to compile fine after changing Q_WS_WIN to Q_OS_WIN) In Qt4 on Windows WId was just a typedef for HWND, so this was no problem. In Qt5 this is not the case anymore. I found some mailing list posting that could give a clue but it seems QPlatformNativeInterface is not part of the public API of Qt5 anymore.

程序调用 EcWin7.init(this->winId()); 并且我需要某种方式将此 ID 转换为 HWND id 或其他方式得到这个.

The program calls EcWin7.init(this->winId()); and I need to some way to convert this ID into the HWND id or some other way to get this.

推荐答案

在 Qt5 中 winEvent 被 nativeEvent 取代:

In Qt5 winEvent was replaced by nativeEvent:

bool winEvent(MSG* pMsg, long* result)

现在

bool nativeEvent(const QByteArray & eventType, void * message, long *result)

并且在 EcWin7::winEvent 中，您必须将 void 转换为 MSG:

And in EcWin7::winEvent you have to cast void to MSG:

bool EcWin7::winEvent(void * message, long * result)
{
    MSG* msg = reinterpret_cast<MSG*>(message);
    if (msg->message == mTaskbarMessageId)
    {
      ...

我能够让应用程序运行！只需替换:

I was able to get the application to work! Just replace:

 mWindowId = wid;

与

 mWindowId = (HWND)wid;

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