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Bug
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Resolution: Unresolved
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P3: Somewhat important
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None
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5.9.1
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None
Hi, below is the code that is used in my project.
- When the login window is displayed, click in one of the input fields to show the virtual keyboard.
- Hide the virtual keyboard.
- Press escape to close the login window. The application will crash with "QPixmap: Must construct a QGuiApplication before a QPixmap".
#include <QApplication> #include <SingleApplication.h> #include <QDialog> #include <QtCore/QCoreApplication> #include <QtWidgets/QApplication> #include <VLCQtCore/Common.h> #include "logging.h" #include "login.h" #include "pvmswindow.h" int main(int argc, char *argv[]) { int currentExitCode = 0; do { qputenv("QT_IM_MODULE", QByteArray("qtvirtualkeyboard")); QCoreApplication::setApplicationName("VLC-Qt Simple Player"); QCoreApplication::setAttribute(Qt::AA_X11InitThreads); SingleApplication app(argc, argv); VlcCommon::setPluginPath(app.applicationDirPath() +"/plugins"); Login login; login.showFullScreen(); if(login.exec() == QDialog::Accepted) { PvmsWindow w; //("admin", "123456", "admin right"); QObject::connect( &app, &SingleApplication::instanceStarted, [ &w ]() \{ w.raise(); w.activateWindow(); }); w.showFullScreen(); currentExitCode = app.exec(); } }while (currentExitCode == PvmsWindow::EXIT_CODE_REBOOT); return currentExitCode; }
1 qt_message_fatal qlogging.cpp 1684 0x52a9262b 2 QMessageLogger::fatal qlogging.cpp 796 0x52a90e52 3 qt_pixmap_thread_test qpixmap.cpp 75 0x7ffac1108041 4 QPixmap::QPixmap qpixmap.cpp 110 0x7ffac1104608 5 QCursorData::QCursorData qcursor.cpp 624 0x7ffac102da76 6 QCursorData::initialize qcursor.cpp 655 0x7ffac102dba1 7 QCursor::QCursor qcursor.cpp 471 0x7ffac102cbf9 8 QWindowPrivate::setCursor qwindow.cpp 2706 0x7ffac102595c 9 QWindow::unsetCursor qwindow.cpp 2680 0x7ffac1023204 10 QQuickItemPrivate::derefWindow qquickitem.cpp 3042 0x7ffab5188110 11 QQuickItemPrivate::derefWindow qquickitem.cpp 3063 0x7ffab5188268 12 QQuickItemPrivate::derefWindow qquickitem.cpp 3063 0x7ffab5188268 13 QQuickItemPrivate::derefWindow qquickitem.cpp 3063 0x7ffab5188268 14 QQuickItem::setParentItem qquickitem.cpp 2731 0x7ffab5179132 15 QQuickItem::~QQuickItem qquickitem.cpp 2374 0x7ffab517873e 16 QQmlPrivate::QQmlElement<QQuickItem>::~QQmlElement<QQuickItem> qqmlprivate.h 104 0x7ffab521544d 17 QQmlPrivate::QQmlElement<QQuickItem>::`scalar deleting destructor' Qt5Quickd 0x7ffab5218657 18 QQuickView::~QQuickView qquickview.cpp 208 0x7ffab52f1f06 19 QtVirtualKeyboard::InputView::~InputView qtvirtualkeyboardplugind 0x7ffac02a2e24 20 QtVirtualKeyboard::InputView::`scalar deleting destructor' qtvirtualkeyboardplugind 0x7ffac02a2e57 21 QScopedPointerDeleter<QtVirtualKeyboard::InputView>::cleanup qscopedpointer.h 60 0x7ffac02a2aaa 22 QScopedPointer<QtVirtualKeyboard::InputView,QScopedPointerDeleter<QtVirtualKeyboard::InputView>>::~QScopedPointer<QtVirtualKeyboard::InputView,QScopedPointerDeleter<QtVirtualKeyboard::InputView>> qscopedpointer.h 108 0x7ffac02a26f0 23 QtVirtualKeyboard::DesktopInputPanelPrivate::~DesktopInputPanelPrivate qtvirtualkeyboardplugind 0x7ffac02a275a 24 QtVirtualKeyboard::DesktopInputPanelPrivate::`scalar deleting destructor' qtvirtualkeyboardplugind 0x7ffac02a29c7 25 QScopedPointerDeleter<QObjectData>::cleanup qscopedpointer.h 60 0x52ede179 26 QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData>>::~QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData>> qscopedpointer.h 107 0x52edc899 27 QObject::~QObject qobject.cpp 1032 0x52ece73f 28 QtVirtualKeyboard::AbstractInputPanel::~AbstractInputPanel abstractinputpanel.cpp 77 0x7ffac0293bd3 29 QtVirtualKeyboard::AppInputPanel::~AppInputPanel appinputpanel.cpp 46 0x7ffac02a2fa2 30 QtVirtualKeyboard::DesktopInputPanel::~DesktopInputPanel desktopinputpanel.cpp 98 0x7ffac02a1342 31 QtVirtualKeyboard::DesktopInputPanel::`scalar deleting destructor' qtvirtualkeyboardplugind 0x7ffac02a2977 32 QObjectPrivate::deleteChildren qobject.cpp 1992 0x52ed45b6 33 QObject::~QObject qobject.cpp 1022 0x52ece6c0 34 QPlatformInputContext::~QPlatformInputContext qplatforminputcontext.cpp 92 0x7ffac0fd0683 35 QtVirtualKeyboard::PlatformInputContext::~PlatformInputContext platforminputcontext.cpp 63 0x7ffac02647c9 36 QtVirtualKeyboard::PlatformInputContext::`scalar deleting destructor' qtvirtualkeyboardplugind 0x7ffac0266e07 37 QScopedPointerDeleter<QPlatformInputContext>::cleanup qscopedpointer.h 60 0x7ffac05fae5a 38 QScopedPointer<QPlatformInputContext,QScopedPointerDeleter<QPlatformInputContext>>::~QScopedPointer<QPlatformInputContext,QScopedPointerDeleter<QPlatformInputContext>> qscopedpointer.h 108 0x7ffac05fa510 39 QWindowsIntegrationPrivate::~QWindowsIntegrationPrivate qwindowsintegration.cpp 246 0x7ffac05f8502 40 QWindowsIntegrationPrivate::`scalar deleting destructor' qwindowsd 0x7ffac05faad7 41 QScopedPointerDeleter<QWindowsIntegrationPrivate>::cleanup qscopedpointer.h 60 0x7ffac05fadf4 42 QScopedPointer<QWindowsIntegrationPrivate,QScopedPointerDeleter<QWindowsIntegrationPrivate>>::~QScopedPointer<QWindowsIntegrationPrivate,QScopedPointerDeleter<QWindowsIntegrationPrivate>> qscopedpointer.h 108 0x7ffac05fa4e0 43 QWindowsIntegration::~QWindowsIntegration qwindowsintegration.cpp 263 0x7ffac05f6784 44 QWindowsGdiIntegration::~QWindowsGdiIntegration qwindowsgdiintegration.cpp 62 0x7ffac0696863 45 QWindowsGdiIntegration::`scalar deleting destructor' qwindowsd 0x7ffac0696bd7 46 QGuiApplicationPrivate::~QGuiApplicationPrivate qguiapplication.cpp 1540 0x7ffac1003951 47 QApplicationPrivate::~QApplicationPrivate qapplication.cpp 189 0x51bba31a 48 QApplicationPrivate::`vector deleting destructor' Qt5Widgetsd 0x51bc9c99 49 QScopedPointerDeleter<QObjectData>::cleanup qscopedpointer.h 60 0x52ede179 50 QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData>>::~QScopedPointer<QObjectData,QScopedPointerDeleter<QObjectData>> qscopedpointer.h 107 0x52edc899 51 QObject::~QObject qobject.cpp 1032 0x52ece73f 52 QCoreApplication::~QCoreApplication qcoreapplication.cpp 882 0x52e76cd5 53 QGuiApplication::~QGuiApplication qguiapplication.cpp 649 0x7ffac1001911 54 QApplication::~QApplication qapplication.cpp 870 0x51bb3f5c 55 SingleApplication::~SingleApplication singleapplication.cpp 416 0x7ff7c408a84e 56 main main.cpp 44 0x7ff7c40838c0 57 WinMain qtmain_win.cpp 104 0x7ff7c4092a1d 58 invoke_main exe_common.inl 107 0x7ff7c40904fd 59 __scrt_common_main_seh exe_common.inl 283 0x7ff7c40903b7 60 __scrt_common_main exe_common.inl 326 0x7ff7c409027e 61 WinMainCRTStartup exe_winmain.cpp 17 0x7ff7c4090589 62 BaseThreadInitThunk KERNEL32 0x7ffb06f01fe4 63 RtlUserThreadStart ntdll 0x7ffb079defb1