Right way to include Qtxxx/private headers in Qt5 ?

Dana Yan

I am trying to move a project from Qt4.x to Qt5.x. The project is built with Visual Studio 2013.
At present, I met a problem. Since Qt 5, some APIs/classes are changed. I need to use some classes in QtGui/private, QtGui/qpa, QtCore/private. Like these

#include <QtGui/private/qguiapplication_p.h>
#include <QtGui/qpa/qplatformintegration.h>
#include <QtGui/qpa/qplatforminputcontext.h>

For this purpose, I need to add these to Include path

$(QTDIR)/include/QtCore/5.5.1
$(QTDIR)/include/QtGui/5.5.1

Some people say that add QT += gui-private to the .pro would work. This makes me confused, Because my project is built with Visual Studio.
What's more, we can include all QtWidgets header by using

#include <QtWidgets/QtWidgets>

Is there a way to include all private headers. Is there a configure param( If I build Qt from source myself). Such as

#include <QtGui/private>
#include <QtGui/qpa>

Or I need to make the file private/qpa myselft ?

SGaist

Hi and welcome to devnet,

No there's no global private nor qpa include.

What private API do you need ? Especially from QPA ?

Dana Yan

@SGaist Thanks for reply.
I have code like this

// inputContext is from QWidget
QInputContext* ic = inputContext();
if (ic)
{
    ic->reset();
    ic->update();
}

In Qt5, inputContext seems being removed, and QInputContext either.
After making the changes, the code as below

QPlatformInputContext* ic = QGuiApplicationPrivate::platformIntegration()->inputContext();
if (ic)
{
    ic->reset();
   // some other code
   ic->update(Qt::ImAbsolutePosition);  // In order to Adjust position of IME
}

API from QtGui/private and QtGui/qpa.

SGaist

What about QGuiApplication::inputMethod and QInputMethod::update ? Both are public API

Dana Yan

@SGaist Thanks. I will have a try.