这样处理键盘消息对不对？ [复制链接]

这个是main.cpp文件：
#include <QApplication>
#include"KeyMove.h"
int main(int argc, char **argv)
{
  QApplication   app(argc, argv);
  KeyMove keymove;
  keymove.show();
  return app.exec();
}

这个是KeyMove.h文件：
#include<QWidget>
#include<QLabel>
#include<QLineEdit>
#include<QKeyEvent>
class KeyMove:public QWidget
{
public:
  KeyMove();
  void keyPressEvent(QEvent *event);
private:
  QLabel *left;
  QLineEdit *keyleft;
};

这个是KeyMove.cpp文件：
#include"KeyMove.h"
#include<QtGui>

KeyMove::KeyMove()
{
  left=new QLabel(tr("Left"));
  keyleft=new QLineEdit;

  QGridLayout* centerlayout=new QGridLayout;
  centerlayout->addWidget(left,0,0,Qt::AlignLeft);
  centerlayout->addWidget(keyleft,1,0,Qt::AlignLeft);

  setLayout(centerlayout);
}

void KeyMove::keyPressEvent(QEvent *event)
{
  if(event->type()==QEvent::KeyPress)
  {
    QKeyEvent *ke=static_cast<QKeyEvent *>(event);
    if(ke->key()==Qt::Key_Left)
          {
            keyleft->setText(tr("left key has been pressed"));
          }

  }
}