why node-editor source can not detect header files QGraphicsPixmapItem?

[stackprogramer]

i downloaded project node-editor from link below:
http://nukengine.com/qt-node-editor/

when i built it it had errors !!

F:\Users\ROOT\Desktop\work\nodeeditor\dwNodeEditor1.bak5.0_before_refact1\src\Impl\NodeItem.h:5: 
error: QGraphicsPixmapItem: No such file or directory
 #include<QGraphicsPixmapItem>
                            

why it can not detect header file????????

[SGaist]

Hi,

It's a Qt 4 project so you have to at least add QT += widgets in the .pro file and you may need to either remove all the modules from the includes or change the one from QtGui to QtWidget where appropriate.