qt界面收缩

void onemaingui::shrink()
{
    if(shrink_bool == false)
    {
        this->setFixedSize(this->size().width()-20,this->size().height());
        shrinkButton->setGeometry(QRect(shrinkButton->x()-20, 5, 26, 31));
        if(this->size().width()<=shrinkButton->width()+2)
        {
            widget->hide();
            timer_shrink->stop();
            shrink_bool=true;
            shrinkButton->setStyleSheet(QString(".QPushButton{border-image: url(./images/show.png);}"));
            if(!splitScreen->isHidden())
            {
                splitScreen->hide();
            }
            else
            {
                operate->hide();
            }
        }
    }
    else
    {
        widget->show();
        splitScreen->show();
        if(this->size().width()<=810)
        {
            this->setFixedSize(this->size().width()+20,this->size().height());
            shrinkButton->setGeometry(QRect(shrinkButton->x()+20, 5, 26, 31));
        }
        else
        {
             shrinkButton->setStyleSheet(QString(".QPushButton{border-image: url(./images/shrink.png);}"));
            timer_shrink->stop();
            shrink_bool=false;
            lock_bool=true;
            this->setFixedSize(830,this->size().height());
        }
    }
}
//向左缩进timer_shrink= new QTimer(this);
 connect(timer_shrink, SIGNAL(timeout()), this, SLOT(shrink()));
timer_shrink->start(10);