qt 4.8.5 程序运行时随机出错

weixin_38079044 2019-09-19 12:40:05

我的一个应用由于没有鼠标，在界面上的pushbutton qlineedit 等用左右键切换，重载了qlineedit类，但反复切换一段时间后，当光标进行qlineedit 中后，无法在把焦点切出来了。centos5的控制台没有报错信息，其他线程也正常工作，就是重载了qlineedit类无法接收到key event了。也不是一直错，跑一段时间后不好用。求大家帮我看看#ifndef DEMOEDIT_H#define DEMOEDIT_H#include<QLineEdit>#include<QKeyEvent>class DemoEdit : public QLineEdit{ public: DemoEdit(QWidget *p=NULL); protected: virtual void keyPressEvent(QKeyEvent *e);};#endif // DEMOEDIT_H#include "demoedit.h"#include<QDebug>DemoEdit::DemoEdit(QWidget * p):QLineEdit(p){}void DemoEdit::keyPressEvent(QKeyEvent *e){int key=e->key();if(key==Qt::Key_Right){ focusNextChild(); e->accept(); qDebug()<<"focusNextChild";}else if(key==Qt::Key_Down){ focusNextChild(); qDebug()<<"focusPreviousChild"; e->accept();}else if(key==Qt::Key_Left){ focusPreviousChild(); qDebug()<<"focusPreviousChild"; e->accept();}else if(key==Qt::Key_Up){ focusPreviousChild(); qDebug()<<"focusPreviousChild"; e->accept();}else if(key==Qt::Key_Escape)//Qt:Key_Escape{ this->setText(""); e->accept();}else if(key==Qt::Key_F12)//Qt:Key_Escape{ this->setText((this->text()+".")); e->accept();}else{ QLineEdit::keyPressEvent(e); qDebug()<<" QLineEdit::keyPressEvent(e);";}}

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