Hi
If you changed to
Dialog::Dialog(QStringList listToLoad, QWidget *parent = 0) ;

Make sure to change it both in .h file and .cpp file so they match.

Dear All: here is my situation

The class which cause compile Error is PropertyColumnMapping in DynamicObjectCore.pro Then CommonBusiness.pro using this class And Presentation linked to both CommonBusiness.pro & DynamicObjectCore.pro

Clean + QMake + Rebuild doesn't work.

Here is my Project Structure.

Application.pro
TEMPLATE = subdirs
CONFIG += ordered

SUBDIRS +=
Framework
Services
Business
Presentation
Updater

QT += qml quick widgets network sql xml

Business.pro
TEMPLATE = subdirs

SUBDIRS +=
CommonBusiness
ServiceBusiness

//Link to Framework.System

CommonBusiness.pro
QT -= gui
QT += qml quick sql xml xmlpatterns network

TARGET = CommonBusiness
TEMPLATE = lib
CONFIG += staticlib c++11

SOURCES += commonbusiness.cpp
...

HEADERS += commonbusiness.h
...

//# Link to FrameWork.DynamicObjectCore

DynamicObjectCore.pro
QT -= gui
QT += qml

TARGET = DynamicObjectCore
TEMPLATE = lib
CONFIG += staticlib c++11
#DEFINES += DYNAMICOBJECTCORE_LIBRARY

SOURCES +=
MetadataModel/propertycolumnmapping.cpp
...

HEADERS +=
MetadataModel/propertycolumnmapping.h
...
unix {
target.path = /usr/lib
INSTALLS += target
}

Presentation.pro
TEMPLATE = app

TARGET = [ApplicationName]

QT += qml quick widgets network sql xml xmlpatterns

//# for QT 5.4
qtHaveModule(webengine) {
QT += webengine
DEFINES += QT_WEBVIEW_WEBENGINE_BACKEND
}

qtHaveModule(webkitwidgets) {
QT += webkitwidgets
}

//# for QT 5.7
equals(QT_VERSION, QT_VERSION_CHECK(5, 7, 0)) {
QT += webview
DEFINES += QT_WEBVIEW_CONTROL_BACKEND
}

CONFIG += c++11

CONFIG(release, debug|release) {
CONFIG += release force_debug_info
}
RESOURCES += qml.qrc
shared.qrc

//# Link to DynamicObjectCore
//# Link to CommonBusiness

Hi,

QObject is a non copyable type. See here for more information.

Hi,

Since you marked it solved, can you share what you did to fix your code ?

@alogim
Hello,
Unfortunately, no. To make use of the parent-child mechanism your object must derive from QObject at least. Search through the forum for "QObject" and "RAII", Here is a thread where I've put some effort in explaining the QObject ownership. Back to your question:

class Object : public QObject { public: Object(QWidget * parent = 0) : QObject(parent) { } };

Will do what you want, i.e. delete the Object when the parent is destroyed. Then you indeed create your object like this:

Object * obj = new Object(this);

and it's sufficient to ensure proper cleanup.

Kind regards.

@Wieland Thank you, I guessed the first was some kind of copy constructor.
As concerns the second, it was just a curiosity of mine. Thank you :)

I solved my problem with not calling parseFunction in its own class constructor but with signals and slots in mainwindow.cpp file:

connect(xml, SIGNAL(started()), first, SLOT(parseFunction()));