QT下使用方向键控制按键的移动

[qq_35090619]

大家好，小弟是新手，现在有个问题需要请教，是在嵌入式平台下，UI中有6个菜单，使用Qpushbutton控件，无触摸屏，使用物理按键（使用keys-gpio已实现键盘功能）我想使用Key_Right和Key_Left来控制按键焦点的移动，在网上参考网友的代码，现在按下Key_Right焦点乱跑，请各位高手，如何控制焦点的移动，谢谢！

#include "widget.h"
#include "ui_widget.h"

Widget::Widget(QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget)
{
    ui->setupUi(this);

    ui->btn0->installEventFilter(this);
    ui->btn1->installEventFilter(this);
    ui->btn2->installEventFilter(this);
    ui->btn3->installEventFilter(this);
    ui->btn4->installEventFilter(this);
    ui->btn5->installEventFilter(this);
}

Widget::~Widget()
{
    delete ui;
}

bool Widget::eventFilter(QObject *watched, QEvent *event)
{
    if(watched == ui->btn0 || watched == ui->btn1 || watched == ui->btn2
      || watched == ui->btn3 || watched == ui->btn4 || watched == ui->btn5){
        if(event->type() == QEvent::KeyPress){
            bool  b0 = ui->btn0->hasFocus();
            bool  b1 = ui->btn1->hasFocus();
            bool  b2 = ui->btn2->hasFocus();
            bool  b3 = ui->btn3->hasFocus();
            bool  b4 = ui->btn4->hasFocus();
            bool  b5 = ui->btn5->hasFocus();

            QKeyEvent *key_event = static_cast<QKeyEvent *>(event);
            if(key_event->key() == Qt::Key_Right){
                if(b0){
                    qWarning()<<"----btn0";
                    focusNextChild();
                    ui->btn1->setFocus();
                }
                if(b1){
                    qWarning()<<"----btn1";
                    focusNextChild();
                    ui->btn2->setFocus();
                }
                if(b2){
                    qWarning()<<"----btn2";
                    focusNextChild();
                    ui->btn3->setFocus();
                }
                if(b3){
                    qWarning()<<"----btn3";
                    focusNextChild();
                    ui->btn4->setFocus();
                }
                if(b4){
                    qWarning()<<"----btn4";
                    focusNextChild();
                    ui->btn5->setFocus();
                }
                if(b5){
                    qWarning()<<"----btn5";
                    focusNextChild();
                    ui->btn0->setFocus();
                }
            }

            if (watched==ui->btn0){
                if (event->type()==QEvent::FocusIn){
                    qWarning()<<"btn0 focus in";
                }
                else if (event->type()==QEvent::FocusOut){
                    qWarning()<<"btn0 focus out";
                }
            }
            if (watched==ui->btn1){
                if (event->type()==QEvent::FocusIn){
                    qWarning()<<"btn1 focus in";
                }
                else if (event->type()==QEvent::FocusOut){
                    qWarning()<<"btn1 focus out";
                }
            }
            if (watched==ui->btn2){
                if (event->type()==QEvent::FocusIn){
                    qWarning()<<"btn2 focus in";
                }
                else if (event->type()==QEvent::FocusOut){
                    qWarning()<<"btn2 focus out";
                }
            }
            if (watched==ui->btn3){
                if (event->type()==QEvent::FocusIn){
                    qWarning()<<"btn3 focus in";
                }
                else if (event->type()==QEvent::FocusOut){
                    qWarning()<<"btn3 focus out";
                }
            }
            if (watched==ui->btn4){
                if (event->type()==QEvent::FocusIn){
                    qWarning()<<"btn4 focus in";
                }
                else if (event->type()==QEvent::FocusOut){
                    qWarning()<<"btn4 focus out";
                }
            }
            if (watched==ui->btn5){
                if (event->type()==QEvent::FocusIn){
                    qWarning()<<"btn5 focus in";
                }
                else if (event->type()==QEvent::FocusOut){
                    qWarning()<<"btn5 focus out";
                }
            }
        }
    }
    return QWidget::eventFilter(watched,event);
}