問題描述

我正在嘗試將 Qt4 應用程序轉換為 Qt5.我唯一想不通的是如何獲得小部件的HWND.該程序使用 EcWin7 在 win 7+ 的任務欄圖標上顯示進度，但需要 HWND.將 Q_WS_WIN 更改為 Q_OS_WIN 后，lib 本身似乎可以正常編譯)在 Windows 上的 Qt4 中，WId 只是 HWND 的 typedef，所以這沒問題.在 Qt5 中，情況不再如此.我發現了一些 郵件列表發布 可以提供線索，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.

程序調用 EcWin7.init(this->winId()); 并且我需要某種方式將此 ID 轉換為 HWND id 或其他方式得到這個.

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.

推薦答案

在 Qt5 中 winEvent 被 nativeEvent 取代:

In Qt5 winEvent was replaced by nativeEvent:

bool winEvent(MSG* pMsg, long* result)

現在

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

并且在 EcWin7::winEvent 中，您必須將 void 轉換為 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)
    {
      ...

我能夠讓應用程序運行！只需替換:

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

 mWindowId = wid;

與

 mWindowId = (HWND)wid;

這篇關于使用 Qt5 在 Windows 上獲取 HWND(來自 WId)的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！