qt - Incompatible type in custom QGraphicsPixmapItem -


i have following code returns "assigning 'graphicspixmapitem *' incompatible type 'graphicspixmapitem *' compiler error.

can me?

here code:

the main file:

#include "graphicsscene.h" #include <qapplication> #include <qgraphicsview>  int main(int argc, char *argv[]) {     qapplication a(argc, argv);      graphicsscene scene;     scene.setscenerect(0, 0, 318, 458);     qgraphicsview view(&scene);     view.setbackgroundbrush(qpixmap(":/images/background.jpg"));     view.show();     return a.exec(); }

the custom graphicsscene header:

#ifndef graphicsscene_h #define graphicsscene_h  #include <qgraphicsscene>  #include "graphicspixmapitem.h"  class graphicsscene : public qgraphicsscene {     q_object public:     explicit graphicsscene(qwidget *parent = 0);     qgraphicspixmapitem *logo; };  #endif // graphicsscene_h

the custom graphicsscene cpp:

#include "graphicsscene.h"  graphicsscene::graphicsscene(qwidget *parent) :     qgraphicsscene() {     qpixmap contactinfo(":/images/screencontacts.png");     graphicspixmapitem *buf = new graphicspixmapitem;     buf = addpixmap(contactinfo);     buf->setpos(0, 40);     buf->setflags(qgraphicsitem::itemismovable | qgraphicsitem::itemsendsscenepositionchanges); }

the custom qgraphicspixmapitem header:

#ifndef graphicspixmapitem_h #define graphicspixmapitem_h  #include <qobject> #include <qgraphicspixmapitem>  class graphicspixmapitem : public qobject, public qgraphicspixmapitem {     q_object public:   graphicspixmapitem(qgraphicsitem *parent = 0, qgraphicsscene *scene = 0);  protected:      qvariant itemchange(graphicsitemchange change, const qvariant &value); };  #endif // graphicspixmapitem_h

and custom qgraphicspixmapitem cpp:

#include "graphicspixmapitem.h"  graphicspixmapitem::graphicspixmapitem(qgraphicsitem *parent, qgraphicsscene *scene)   : qgraphicspixmapitem(parent, scene) { }  #include <qdebug> qvariant graphicspixmapitem::itemchange(graphicsitemchange change, const qvariant &value) {     qdebug() << "itemchange triggered";     if (change == itempositionchange) {             qdebug() << "position changed";         }     return qgraphicsitem::itemchange(change, value); }

qgraphicsscene::addpixmap() returns qgraphicspixmapitem. you're trying assign pointer qgraphicspixmapitem pointer graphicspixmapitem, different types.

also note assigning buf using new, , calling qgraphicsscene::addpixmap(), you're creating 2 distinct objects, namely 1 graphicspixmapitem (from new) , 1 qgraphicspixmap (from addpixmap) item.

what want buf->setpixmap(contactinfo); , call additem(buf); scene constructor, , eliminate addpixmap() call.


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