Qt中QEvent的过滤和分发

绘制窗体为400*300大小的窗口，标题栏为“My Window"。实现如下效果：

#include "useevent.h"
#include <QtGui/QMouseEvent>
#include <QtGui/QMessageBox>
#include <QtGlobal>

UseEvent::UseEvent(QWidget *parent, Qt::WFlags flags)
	: QMainWindow(parent, flags)
{
	setWindowTitle(QString("My Window"));
	setFixedWidth(400);
	setFixedHeight(300);
	installEventFilter(this);
}

bool UseEvent::event(QEvent* e)
{
	if (!e->isAccepted() && e->type() == QEvent::MouseButtonPress)
	{
		QMessageBox::information(NULL, QString("tips"), QString("right click ignored!"));
		return true;
	}
	return false;
}

bool UseEvent::eventFilter(QObject* o, QEvent *e)
{
	if (e->type() == QEvent::MouseButtonPress)
	{
		QMouseEvent* mouseEvent = dynamic_cast<QMouseEvent*>(e);
		if (mouseEvent->button() == Qt::RightButton)
		{
			e->ignore();
		}
	}
	return false;
}

UseEvent::~UseEvent()
{

}