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When I create classes which implement QWidget, QGraphicsView, QGraphicsItem etc… I always just include QtGui instead of QtWidget, QGraphicsView etc… is this bad practice? Is there any performance cost? Is build time longer because of this?
If the
QtGuiheader includes all other headers, then compile time will be longer, as the compilers pre-processor has to read more files and the compiler itself will have more classes/structures to parse and keep track of. However, linking time and more importantly runtime will not be affected.