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Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type

5 years 3 months ago #1 by James
Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type was created by James
Compiling QTitanRibbon 5.0.1 with Visual Studio 2017 (32-bit config) and Qt 5.12.4. Seeing this compile time error:

qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type 'QScreen'

I'm prepared to go hack the code, but I'd like to know if there's something wrong with my build configuration before I do.

Has anyone else seen the problem?

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5 years 3 months ago #2 by Developer Machines
Replied by Developer Machines on topic Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type
Please add #include <QScreen> line to the header of QtnWindowTitleBar.cpp and try to rebuild.

P.S. A strange problem, since we are developing in Qt 5.12 and Qt5.13 and there is no such issue.

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5 years 3 months ago #3 by James
Replied by James on topic Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type
I did add the #include to the file in order to continue with progress.

I noticed that the #include was not required when building the demos directly from the QTitanRibbon installation.

This error occurs only when building the code directly into my application. Not sure why this is happening. It might have to do with the #if on line 1145:

#if (QT_VERSION >= QT_VERSION_CHECK(5, 0, 0))
QSize size = QGuiApplication::primaryScreen()->virtualSize();

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5 years 3 months ago #4 by Developer Machines
Replied by Developer Machines on topic Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type
>>This error occurs only when building the code directly into my application.

How you add the code to your app? Can you provide more details?

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5 years 3 months ago #5 by James
Replied by James on topic Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type
We add QTitanRibbon as a VC++ project. The project is part of a larger solution. The build flags for the project are: /D QTITAN_LIBRARY_STATIC /D QTN_NAMESPACE

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5 years 3 months ago #6 by Developer Machines
Replied by Developer Machines on topic Compile Error qtnwindowtitlebar.cpp(1146): error C2027: use of undefined type
Please note, you can build component library statically, in this case all defines will be added automatically. To build it statically pass "qtitan_staticlib" switch to the qmake:

qmake.exe -staticlib -r -platform <platform>
or
qmake.exe CONFIG+=qtitan_staticlib -r -platform <platform>

www.devmachines.com/documentation/Qtitan...mponent-from-sources

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