c++ - 打开应用程序主窗口 在系统托盘图标的其他应用程序之上

Question

Qt 应用程序最小化。 以 ApplicationWindow 作为主窗口在 QML 上实现的 UI。

当我右键单击托盘中的应用程序图标时，会显示一个菜单。菜单项之一是“打开”。单击它时，将调用此代码(很可能是多余的):

mainWidget->activateWindow();
window->showNormal();
Qt::WindowState newWindowState = (Qt::WindowState)((window->windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
window->setWindowState(newWindowState);

如果双击托盘图标时调用相同的代码，则应用程序窗口打开，但仍保留在其他应用程序下。

如何解决这个问题？

qDebug() << "GetCurrentThreadId: " << GetCurrentThreadId();
qDebug() << "windowFlags: " << mainWidget->windowFlags();
qDebug() << "windowState: " << window->windowState();

mainWidget->activateWindow();
window->showNormal();
Qt::WindowState newWindowState = (Qt::WindowState)((mainWindow()->windowState() & ~Qt::WindowMinimized) | Qt::WindowActive);
window->setWindowState(newWindowState);

qDebug() << "GetCurrentThreadId: " << GetCurrentThreadId();
qDebug() << "windowFlags: " << mainWidget->windowFlags();
qDebug() << "windowState: " << window->windowState();

应用成功打开时的输出:

[16:00:17]  [D]  GetCurrentThreadId:  1092
[16:00:17]  [D]  windowFlags:  QFlags<Qt::WindowType>(Popup|WindowTitleHint|WindowSystemMenuHint|WindowMinMaxButtonsHint|WindowCloseButtonHint|WindowFullscreenButtonHint)
[16:00:17]  [D]  windowState:  Qt::WindowState(WindowMinimized)
[16:00:17]  [W]  QWindow::setWindowState does not accept Qt::WindowActive
[16:00:17]  [D]  GetCurrentThreadId:  1092
[16:00:17]  [D]  windowFlags:  QFlags<Qt::WindowType>(Popup|WindowTitleHint|WindowSystemMenuHint|WindowMinMaxButtonsHint|WindowCloseButtonHint|WindowFullscreenButtonHint)
[16:00:17]  [D]  windowState:  Qt::WindowState(WindowNoState)

当窗口停留在其他应用程序下时的输出:

[16:00:23]  [D]  GetCurrentThreadId:  1092
[16:00:23]  [D]  windowFlags:  QFlags<Qt::WindowType>(Popup|WindowTitleHint|WindowSystemMenuHint|WindowMinMaxButtonsHint|WindowCloseButtonHint|WindowFullscreenButtonHint)
[16:00:23]  [D]  windowState:  Qt::WindowState(WindowMinimized)
[16:00:23]  [W]  QWindow::setWindowState does not accept Qt::WindowActive
[16:00:23]  [D]  GetCurrentThreadId:  1092
[16:00:23]  [D]  windowFlags:  QFlags<Qt::WindowType>(Popup|WindowTitleHint|WindowSystemMenuHint|WindowMinMaxButtonsHint|WindowCloseButtonHint|WindowFullscreenButtonHint)
[16:00:23]  [D]  windowState:  Qt::WindowState(WindowNoState)

Answer 1

找到了可行的解决方案 https://stackoverflow.com/a/41565553/3569069

for ( QWindow* appWindow : qApplication.allWindows() )
{
  appWindow->show(); //bring window to top on OSX
  appWindow->raise(); //bring window from minimized state on OSX

  appWindow->requestActivate(); //bring window to front/unminimize on windows
}

edit 1. 上述方法在 Windows 行为方面存在一些小问题。最后是这样的:

QWindow* mainWindow = qApp->topLevelWindows()[0];
mainWindow->show();
mainWindow->raise();
mainWindow->requestActivate();