Mouse Tracking doesnt work from QCanvasView?

I'm trying to get mousetracking in a window containing a QCanvasView derived widget, but no matter from where I call setMousetracking(true), I only get called in mouseMoveEvent() if I hold down one of the mouse buttons.

I tried calling setMousetracking() from the myview class, and from the MainWindow class, but neither work. I also tried implementing the MainWindow::mouseMoveEvent(), but it still doesnt work.

If I just create the MainWindow (and not the myview class), and implement MainWindow::mouseMoveEvent(), calling setMouseTracking from MainWindow, then it works fine.

Can anyone help?

Here's my entire test app (qt 3.3.7):

Code:

//main.cpp
 
#include <qapplication.h>
#include "mainwindow.h"
 
QApplication *pApp;
 
int main(int argc, char *argv[])
{
     QApplication app(argc, argv);
     pApp = &app;
     MainWindow mainWin(0);
     app.setMainWidget(&mainWin);
     mainWin.show();
     //mainWin.initCanvas();
     app.connect( &app, SIGNAL( lastWindowClosed() ), &app, SLOT( quit() ) );
     return app.exec();
}
 
 
////////////////////////////////////////////////////////////////////////////////////////////
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
 
#include <qobject.h>
#include <qmainwindow.h>
#include <qcanvas.h>
 
#include "myview.h"
 
class MainWindow : public QMainWindow
{
	Q_OBJECT
 
public:
	MainWindow(QWidget *parent);
	void initCanvas();
	myview *pmyview;
	QCanvas *pcanvas;
 
protected:
	virtual void closeEvent(QCloseEvent *event);
};
#endif
/////////////////////////////////////////////////////////////////////////////////////////////////////////////
//mainwindow.cpp
#include <iostream>
#include <qapplication.h>
#include <qcanvas.h>
 
#include "mainwindow.h"
#include "myview.h"
 
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
	initCanvas();
}
 
void MainWindow::initCanvas()
{
	pmyview = new myview(this);
	pcanvas = new QCanvas(640,480);
	pmyview->setCanvas(pcanvas);  
	setCentralWidget(pmyview);
	pmyview->show();
 
	//this->pmyview->viewport()->setMouseTracking(true);
	//this->pmyview->setMouseTracking(true);
	//this->setMouseTracking(true);
 	//setMouseTracking(true);
}
 
 
void MainWindow::closeEvent(QCloseEvent *event)
{
	event->accept();
	close();
}
////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
#ifndef MYVIEW_H
#define MYVIEW_H
 
#include <qobject.h>
#include <qcanvas.h>
 
class myview : public QCanvasView
{
	Q_OBJECT
 
public:
	myview(QWidget *parent);
 
protected:
	virtual void mouseMoveEvent( QMouseEvent * e);
 
};
///////////////////////////////////////////////////////////////////////////////////////////////////////////
 
//myview.cpp
#include <iostream>
#include "myview.h"
 
myview::myview(QWidget *parent) : QCanvasView(parent)
{
	setMouseTracking(true);	
}
 
void myview::mouseMoveEvent( QMouseEvent * e)
{
	std::cout << "moving" << std::endl;
}