diff --git a/src/plugins/platforms/windows/qwindowscontext.cpp b/src/plugins/platforms/windows/qwindowscontext.cpp index 38b9823d6b..5c1b00a1c9 100644 --- a/src/plugins/platforms/windows/qwindowscontext.cpp +++ b/src/plugins/platforms/windows/qwindowscontext.cpp @@ -273,6 +273,8 @@ struct QWindowsContextPrivate { const HRESULT m_oleInitializeResult; QWindow *m_lastActiveWindow = nullptr; bool m_asyncExpose = false; + HPOWERNOTIFY m_powerNotification = nullptr; + HWND m_powerDummyWindow = nullptr; }; QWindowsContextPrivate::QWindowsContextPrivate() @@ -313,6 +315,13 @@ QWindowsContext::~QWindowsContext() #if QT_CONFIG(tabletevent) d->m_tabletSupport.reset(); // Destroy internal window before unregistering classes. #endif + + if (d->m_powerNotification) + UnregisterPowerSettingNotification(d->m_powerNotification); + + if (d->m_powerDummyWindow) + DestroyWindow(d->m_powerDummyWindow); + unregisterWindowClasses(); if (d->m_oleInitializeResult == S_OK || d->m_oleInitializeResult == S_FALSE) OleUninitialize(); @@ -380,6 +389,55 @@ bool QWindowsContext::initPointer(unsigned integrationOptions) return true; } +extern "C" LRESULT QT_WIN_CALLBACK qWindowsPowerWindowProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) +{ + if (message != WM_POWERBROADCAST || wParam != PBT_POWERSETTINGCHANGE) + return DefWindowProc(hwnd, message, wParam, lParam); + + static bool initialized = false; // ignore the initial change + if (!initialized) { + initialized = true; + return DefWindowProc(hwnd, message, wParam, lParam); + } + + auto setting = reinterpret_cast(lParam); + if (setting) { + auto data = reinterpret_cast(&setting->Data); + if (*data == 1) { + // Repaint the windows when returning from sleeping display mode. + const auto tlw = QGuiApplication::topLevelWindows(); + for (auto w : tlw) { + if (w->isVisible() && w->windowState() != Qt::WindowMinimized) { + if (auto tw = QWindowsWindow::windowsWindowOf(w)) { + if (HWND hwnd = tw->handle()) { + InvalidateRect(hwnd, nullptr, false); + } + } + } + } + } + } + return DefWindowProc(hwnd, message, wParam, lParam); +} + +bool QWindowsContext::initPowerNotificationHandler() +{ + if (d->m_powerNotification) + return false; + + d->m_powerDummyWindow = createDummyWindow(QStringLiteral("QtPowerDummyWindow"), L"QtPowerDummyWindow", qWindowsPowerWindowProc); + if (!d->m_powerDummyWindow) + return false; + + d->m_powerNotification = RegisterPowerSettingNotification(d->m_powerDummyWindow, &GUID_MONITOR_POWER_ON, DEVICE_NOTIFY_WINDOW_HANDLE); + if (!d->m_powerNotification) { + DestroyWindow(d->m_powerDummyWindow); + d->m_powerDummyWindow = nullptr; + return false; + } + return true; +} + void QWindowsContext::setTabletAbsoluteRange(int a) { #if QT_CONFIG(tabletevent) diff --git a/src/plugins/platforms/windows/qwindowscontext.h b/src/plugins/platforms/windows/qwindowscontext.h index 4908f14629..04290379db 100644 --- a/src/plugins/platforms/windows/qwindowscontext.h +++ b/src/plugins/platforms/windows/qwindowscontext.h @@ -176,6 +176,8 @@ public: bool initTablet(unsigned integrationOptions); bool initPointer(unsigned integrationOptions); + bool initPowerNotificationHandler(); + int defaultDPI() const; QString registerWindowClass(const QWindow *w); diff --git a/src/plugins/platforms/windows/qwindowsintegration.cpp b/src/plugins/platforms/windows/qwindowsintegration.cpp index 5c1fa00088..849e6cf2d0 100644 --- a/src/plugins/platforms/windows/qwindowsintegration.cpp +++ b/src/plugins/platforms/windows/qwindowsintegration.cpp @@ -256,6 +256,8 @@ QWindowsIntegrationPrivate::QWindowsIntegrationPrivate(const QStringList ¶mL m_context.initTouch(m_options); QPlatformCursor::setCapability(QPlatformCursor::OverrideCursor); + + m_context.initPowerNotificationHandler(); } QWindowsIntegrationPrivate::~QWindowsIntegrationPrivate()