QT direction key to move focus

problem

qt Use at The built-in direction key , Moving focus is limited , In some cases , The arrow keys move the position of some parts . For example, this one qt in example, By moving the focus up and down , You cannot move the right column from the left column . Unless used tab key .

How to solve ：

        Scheme 1 ：

Give each control an index , Index by operation （ Addition and subtraction ）, Determine the position of the current part . But when the control changes , For example, a part is hidden , Judgment operation is required . Different interface changes , It's hard to adapt to .

Option two ：

Give each control an index , Index by operation （ Addition and subtraction ）, Determine the position of the current part , meanwhile Operate controls on an interface , Create a linked list , Linked list members have focus control pointers , The focus controls are sequentially indexed to form , The focus control pointer corresponds to the focus control sequence index one by one .

How does that change with the interface , Through the interface control visible attribute , Control is hidden , Skip the control directly , Look up the next one in the linked list .

Example （ Option two ）：

Header file definition ：

struct MovableWidget
    {
        MovableWidget(QWidget * widget,int pos_index)
        {
            widget_ = widget;
            pos_index_ = pos_index_;
        }
        QWidget * widget_;
        int pos_index_;
    };
    QList<MovableWidget> movable_widget_list;
    int pos;

keyPressEvent rewrite 

void Widget::keyPressEvent(QKeyEvent *e)
{
    qDebug() << "keyPressEvent" << e <<e->key()<< Qt::Key_A << endl;
    if(e->key() == Qt::Key_A) //right
    {
        int temp_pos = pos ;
        int size = movable_widget_list.size();

        for(int i =0; i < size;i++ )
        {
            pos = pos + 1;
            pos = pos % size;
            if(pos == temp_pos)
            {
                break;
            }
            else if(movable_widget_list.at(pos).widget_ == NULL)
            {
                continue;
            }
            else if(movable_widget_list.at(pos).widget_->isVisible())
            {
                qDebug() << "pos:" << pos;
                movable_widget_list.at(pos).widget_->setFocus();
                break;
            }
            else
            {
                continue;
            }
        }
    }
    //keyPressEvent(e);
}

The constructor in the interface part adds the sub part to the linked list .

movable_widget_list.append(MovableWidget(ui->toolButton,1));
movable_widget_list.append(MovableWidget(ui->toolButton_2,2));
movable_widget_list.append(MovableWidget(ui->toolButton_3,3));
movable_widget_list.append(MovableWidget(ui->toolButton_4,4));
movable_widget_list.append(MovableWidget(ui->toolButton_5,5));
movable_widget_list.append(MovableWidget(ui->toolButton_6,6));
movable_widget_list.append(MovableWidget(ui->toolButton_7,7));
movable_widget_list.append(MovableWidget(ui->toolButton_8,8));
movable_widget_list.append(MovableWidget(ui->toolButton_9,9));

effect ：