QPushbutton movable Dynamically

[mrjj]

@Apeksha
you can use
const QSize &QResizeEvent::oldSize() const
const QSize &QResizeEvent::size() const
to check what size window has and had.

Based on those numbers , you can do the right thing, store button pos
or to restore the button to old pos.

you can use qDebug() << "size" << event.oldSize() << " to " << event.Size();

to get an idea of what numbers you will see.

You can use
http://doc.qt.io/qt-5/qdesktopwidget.html#availableGeometry

to get how big screen is.

[Apeksha]

@mrjj

I understood saving of old position and new position, but how to restore i.e hoe to set button old position to restore?

[jsulm]

@Apeksha Like this maybe?

ui->pushButton->move(oldX, oldY);

[Apeksha]

@jsulm

I have used the same, but it's not working.

void MainWindow::resizeEvent(QResizeEvent* event)
{
qDebug() << "old size" << event->oldSize() << " to " << event->size();
int oldx,oldy;
oldpos=ui->pushButton->geometry();
oldx=oldpos.x();
oldy=oldpos.y();
qDebug()<<"oldpos x is"<<oldx<<"oldpos y is:"<<oldy;
if (!firstTime) {
ui->pushButton->move(50,100);
}

    else {
         ui->pushButton->move(oldx,oldy);
           firstTime = false;

    }

    QMainWindow::resizeEvent(event);

}

[jsulm]

@Apeksha "it's not working" doesn't help to solve the problem.
Did you analyse why it is not working? You can print out the values oldX, oldY for example.

[Apeksha]

@jsulm

void MainWindow::resizeEvent(QResizeEvent* event)
{
qDebug() << "old size" << event->oldSize() << " to " << event->size();
int oldx,oldy;
oldpos=ui->pushButton->geometry();
oldx=oldpos.x();
oldy=oldpos.y();
qDebug()<<"oldpos x is"<<oldx<<"oldpos y is:"<<oldy;
if (!firstTime) {
ui->pushButton->move(50,100);
}

else {
     ui->pushButton->move(oldx,oldy);
       firstTime = false;

}

QMainWindow::resizeEvent(event);

}

[Apeksha]

Hi,

please can anybody help me to solve this issue?

Thanks in advance.

[jsulm]

@Apeksha Your current resizeEvent is wrong: you read CURRENT button geometry and use it as OLD geometry! You need to store the old posx/posy before and restore it later when needed.

[Apeksha]

@jsulm

K i uderstood , Initially I will save oldx and oldy in constructor and where actually i have to use this oldx and oldy to restore. In above code If I use this oldx and oldy , its not restoring. I am attaching code:

void MainWindow::resizeEvent(QResizeEvent* event)
{
if (!firstTime) {
ui->pushButton->move(50,100);
}

    else {             
        ui->pushButton->move(oldx,oldy);  ---->This oldx and oldy Iam  storing in constructor.
           firstTime = false;
    }

    QMainWindow::resizeEvent(event);

}

[jsulm]

@Apeksha Did you verify the else block was executed? Did you check the oldx/oldy values?

[Apeksha]

@jsulm

Very first time it was executing, when I am resizing it was not executing.

[dsba]

@Apeksha

I think, Problem seems to be with enabling of flag "firsttime".

CAN YOU TRY THIS?

int oldX,oldY,fstFlag=1;

void MainWindow::resizeEvent(QResizeEvent *event)
{
if(!fstFlag)
{
oldX=0;
oldY=0;
fstFlag=1;
}
else
{
fstFlag=0;
oldX=50;
oldY=100;
}
ui->pushbutton->move(oldX,oldY);
}

[Apeksha]

@dsba

Thanks a lot.
Its fine, but when I am resizing my app slowly button is blinking.