EpicsQt and Qtdesigner with Qt 5.7

[<rory.clarke@stfc.ac.uk>]

Hello,

 

I thought your EpicsQt team may be interested in a strange bug with designer’s UI files when I compiled under Qt5.7 (everything else seemed to work just fine). This does not happen with Qt5.5 which, I believe, is the current version.

 

My workflow is as follows:

 

I use designer to layout EqpicsQt widgets and save the ui file

I add the ui form to my .pro. Qmake then generates a .h file

I include that .h form in my code, etc, etc

 

When I compiled my forms on a machine with Qt5.7, they crashed. The error was from the converted designer file:

ui_mv2_epicsDisplay.h:184:106:   required from here
	C:\Qt\Qt5.5.1min\5.5\mingw492_32\include/QtCore/qglobal.h:703:85: error: invalid application of 'sizeof' to incomplete type 'QStaticAssertFailure<false>'
	enum {Q_STATIC_ASSERT_PRIVATE_JOIN(q_static_assert_result, __COUNTER__) = sizeof(QStaticAssertFailure<!!(Condition)>)}
	^
	C:\Qt\Qt5.5.1min\5.5\mingw492_32\include/QtCore/qglobal.h:708:47: note: in expansion of macro 'Q_STATIC_ASSERT'
	#define Q_STATIC_ASSERT_X(Condition, Message) Q_STATIC_ASSERT(Condition)

 

 

I looked and this is caused by QeSimpleShape function QESimpleShape::Never and QVariant

 

qesimpleshape_13->setProperty("displayAlarmStateOption", QVariant(QESimpleShape::Never));

 

This is fine in 5.5 but 5.7 wants you to add Q_DECLARE_METATYPE() information

 

Hope this is useful.

 

Regards,

 

Rory

 

 

Rory Clarke

Electrical and Controls Systems Group

Daresbury Laboratory

Keckwick Lane

Warrington

Cheshire

WA4 4AD

 

E: rory.clarke@stfc.ac.uk

T: 01925 60 Ext. 3172