Swipe Gesture

[HollyJ]

Hi:
Well, I´m new in this forum but some of the topics that are in the site have been so helpful. Just like this one:
Re: Qt Swipe Gesture not working
I´ve already follow all the instruccions and it work!! But i´ve been wondering if you can do it backwards I mean, that the swipe move to left to right like if you wanted to go back to the last stacked page you saw.
Somebody could help me with this?
Thanks.

[J.Hilk]

@HollyJ
hi,
I made a full single finger swipe-Stackwidget a while ago, sadly I'm not allowed to share it.

But that doesn't stop me from giving help, when its needed :-)

Why don't you post what you have, what is working and where you have problems? As a code example, makes it easier for everyone to help/understand.

[HollyJ]

I´ve this swipe menu:

bool Data1::eventFilter(QObject *, QEvent *event)
{
static bool Start = False;
static int xpos_start=0;
int xpos;
int diff_xpos;
static qint64 mSec;
int TotalPages;

QMouseEvent mouseevent = static_cast<QMouseEvent>(mouseevent);

if((event->type()==QEvent::MouseButtonPress)&&(Start==False))
{
    Start = True;
    timer.restart();
    xpos_start=mouseevent.pos().x();
}
else if((event->type()==QEvent::MouseButtonRelease)&&(Start==True))
{
    Start=False;
    xpos=mouseevent.pos().x();
    diff_xpos=xpos_start-xpos;
    mSec=timer.elapsed();
    if((abs(diff_xpos)>300)&&(mSec<200))
    {
       if(diff_xpos<0)
       {
           TotalPages=ui->stackedWidget_2->count();
           if(mindex<TotalPages-1)
               mindex++;
           else
               mindex=0;
           ui->stackedWidget_2->setCurrentIndex(mindex);
       }
       else
       {
           TotalPages=ui->stackedWidget_2->count();
           if(mindex==0)
           {
               mindex--;
           }
           ui->stackedWidget_2->setCurrentIndex(mindex);
       }
    }
}
else if(event->type()==QEvent::MouseMove)
{
    //QStatusBar().showMessage(QString("Mouse move (%1,%2)").arg(mouseevent.pos().x()).arg(mouseevent.pos().y()));
    qDebug()<<QString::number(mouseevent.pos().x());
    qDebug()<<QString::number(mouseevent.pos().y());
}

return false;

}

And it works when I click on everywhere on the right. And displace the pages from left to right. I want something to do this but backwards (right to left)cor that you can return.
Thank you for helping me

[J.Hilk]

@HollyJ
ah, the eventFilter approach, interesting:

From what I see, the swipe back functionality is this part

else
       {
           TotalPages=ui->stackedWidget_2->count();
           if(mindex==0)
           {
               mindex--;
           }
           ui->stackedWidget_2->setCurrentIndex(mindex);
       }

and you would have to change that.

You will have to remember the previous index bevor you change inte index and fall back to that
e.g:

else if((event->type()==QEvent::MouseButtonRelease)&&(Start==True))
{
    Start=False;
    xpos=mouseevent.pos().x();
    diff_xpos=xpos_start-xpos;
    mSec=timer.elapsed();
    if((abs(diff_xpos)>300)&&(mSec<200))
    {
       if(diff_xpos<0)
       {
           TotalPages=ui->stackedWidget_2->count();
           if(mindex<TotalPages-1)
               mindex++;
           else
               mindex=0;
           lastIndex = ui->stackedWidget_2->currentIndex();
           ui->stackedWidget_2->setCurrentIndex(mindex);
       }
       else
       {
           ui->stackedWidget_2->setCurrentIndex(lastIndex);
       }
    }
}

[HollyJ]

Hi @J-Hilk
Thank you so much for answer me too soon. I´ve already try all what you wrote but it still working in the same way. Any suggestions? Or what I´m doing wrong?

[J.Hilk]

@HollyJ
well, I could only guess :-)

Post what you wrote, hand how it behaves differently from what you want it to do.

[HollyJ]

Hi, sorry for the late respond but if some wants to do a swipe on stacked widget with buttons this is the code that works for me:
On right button:
curr = this->ui->YourSwipedpage->currentIndex();
this->ui->YouSwipepage->setCurrentIndex(curr+1);
On Left Button:
curr = this->ui->YourSwipePage->currentIndex();
this->ui->YourSwipePage->setCurrentIndex(curr-1);

Thanks to J.Hilk for all his help