Qt QGraphicsSceneMouseEvent access into incomplete type

Question

I somehow cannot access the class QGraphicsSceneMouseEvent. I don't get what the problem is.

The error occurs when I want to access the mouseEvent.

HEADER

#ifndef SCHAAKBORDUI_H
#define SCHAAKBORDUI_H

#include <QGraphicsScene>
#include "schaakbordvakjeui.h"


class QGraphicsSceneMouseEvent;

class SchaakbordUi : public QGraphicsScene {
public:
    SchaakbordUi();

private:
    bool vakjeGeselecteerd;
    schaakbordVakjeUi *geselecteerd = nullptr;

    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
};

#endif // SCHAAKBORDUI_H

SOURCE

#include "schaakbordui.h"

#define BREEDTE_BORD 8

SchaakbordUi::SchaakbordUi() {
    vakjeGeselecteerd = false;

    for (int i = 0; i < BREEDTE_BORD; i++) {
        for (int j = 0; j < BREEDTE_BORD; j++) {
            this->addItem(new schaakbordVakjeUi(i * 100, j * 100));
        }
    }
}

void SchaakbordUi::mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent) {
   if (mouseEvent->button == Qt::LeftButton);
}

Jesper Juhl · Accepted Answer · 2019-04-22T15:17:43.607

2

You need to

#include <QGraphicsSceneMouseEvent>

for the type to be defined.

Do this in the implementation file when possible, not the header. There's no need to import more code broader than necessary.

edited Apr 22 '19 at 15:17

answered Apr 22 '19 at 14:14

Jesper Juhl

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1

I recommend doing this in the cpp file not the header. – drescherjm Apr 22 '19 at 14:39

Qt QGraphicsSceneMouseEvent access into incomplete type

1 Answers1