sintax

hello guys; Can anyone learn me what is the "#if 1, #else, #endif" meant? Thanks

Code:

---

void myLabel::mousePressEvent(QMouseEvent* e) {
	printf("press\n");
   QDragObject *drobj;
    if ( pixmap() ) {
	drobj = new QImageDrag( pixmap()->convertToImage(), this );
#if 1
	QPixmap pm;
	pm.convertFromImage(pixmap()->convertToImage().smoothScale(
	    pixmap()->width()/3,pixmap()->height()/3));
	drobj->setPixmap(pm,QPoint(-5,-7));
#else
	// Try it.
	(void)new DragMoviePlayer(drobj);
#endif
    } else {
	drobj = new QTextDrag( text(), this );
    }
    drobj->dragCopy();
}

---

Those are precompiler constructs. The compiler checks the condition (which, I think, is always true in this case) and decides which code to parse and compile.

I don't understand why they're there, though. They don't seem to do anything useful.

sorry, I modified it; now, I'll know where it is!