Error: No match for call to '(QPoint)()'

[GT Development]

Please find the code below

void testtab::mousePressEvent(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton)
    {
        //QMouseEvent *e=static_cast<QMouseEvent *>(event);
        startPos = event->pos();
        if(isWindow())
        {
            p = event->globalPos() - startPos();
             msgBox.setText("is window");
             msgBox.exec();
        }
        else
        {
             p = event->pos();
             msgBox.setText("not window");
             msgBox.exec();
        }
    }
}

void testtab::mousePressEvent(QMouseEvent *event)
{
    if(event->button() == Qt::LeftButton)
    {
        //QMouseEvent *e=static_cast<QMouseEvent *>(event);
        startPos = event->pos();
        if(isWindow())
        {
            p = event->globalPos() - startPos();
             msgBox.setText("is window");
             msgBox.exec();
        }
        else
        {
             p = event->pos();
             msgBox.setText("not window");
             msgBox.exec();
        }
    }
}

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[ChrisW67]

It is usually helpful to tell us which line is causing grief. We can guess but it is helpful not to have to.

Where is startPos declared? What type is it? Can you call it as a function like you do in this line.. ?

p = event->globalPos() - startPos();

p = event->globalPos() - startPos();

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[GT Development]

oh sorry...

void testtab::mousePressEvent(QMouseEvent *event)
{
if(event->button() == Qt::LeftButton)
{
//QMouseEvent *e=static_cast<QMouseEvent *>(event);
startPos = event->pos();
if(isWindow())
{
p = event->globalPos() - startPos();  //<-Error : No match for call to '(QPoint)()'
msgBox.setText("is window");
msgBox.exec();
}
else
{
p = event->pos();   //<- Error : No match for call to '(QPoint)()'
msgBox.setText("not window");
msgBox.exec();
}
}
}

void testtab::mousePressEvent(QMouseEvent *event)
{
if(event->button() == Qt::LeftButton)
{
//QMouseEvent *e=static_cast<QMouseEvent *>(event);
startPos = event->pos();
if(isWindow())
{
p = event->globalPos() - startPos();  //<-Error : No match for call to '(QPoint)()'
msgBox.setText("is window");
msgBox.exec();
}
else
{
p = event->pos();   //<- Error : No match for call to '(QPoint)()'
msgBox.setText("not window");
msgBox.exec();
}
}
}

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[wysota]

Why don't you compare your code to the one from the [wiki]Moving widgets[/wiki] article? Differences are kind of obvious.