Reimplemented resizeEvent() is not called

Please check the following implementation:

BoardView.h

#include <QGraphicsView>

class BoardView : public QGraphicsView
{
protected:
    void        resizeEvent(QResizeEvent* event);

public:
    BoardView();
};

BoardView.cpp

BoardView::BoardView()
{
}

void BoardView::resizeEvent(QResizeEvent* event)
{
    QGraphicsView::resizeEvent(event);

    double wd = width();
    double ht = height();
    double min_wh = min(wd, ht);

    qDebug() << min_wh;

    QTransform transform;
    transform.scale(min_wh / Options::getMainBoardMinSize(), min_wh / Options::getMainBoardMinSize());
    setTransform(transform);
}

The above two files are directly copied from an existing project, say P1. The purpose of this code is to handle resizeEvent() and scale the view according to widget size.

The problem is, this works exactly as it should in project P1. Everything is scaled as expected. But resizeEvent() is not called from the new project at all, when the view is resized by resizing main window, on which it is a widget.

The BoardView object d开发者_运维百科oes everything else as expected. It shows the scene. It captures and passes mouse events to the scene etc. Only the resizeEvent() is not called.

What am I doing wrong?

I'm using Qt Creator 2.0.1, Qt 4.7 32 bit on Windows 7 Ultimate 32 bit.

Hmm... Are you missing some code here? Or your class declaration is incorrect - you should change it to

class BoardView : public QGraphicsView
{
    Q_OBJECT
...
public:
    BoardView(QWidget* parent);
};
...
BoardView::BoardView(QWidget* parent):QGraphicsView(parent)
{
}

Sorry if this is omitted by you because of triviality, but I don't know your QT experience level. This might be why QT events works incorrectly with your class...

Why a BoardView::resizeEvent() is not called, yet the QGraphicsView was showing the QGraphicsScene correctly? The reason is a silly mistake, instead of

BoardView _board_view;

I wrote

QGraphicsView _board_view;

Sorry for posting such a silly question!