How to mapToGlobal a QRect?

[medyakovvit]

@Sriu1 said in How to mapToGlobal a QRect?:

mouseMoveEvent

is it parent's mouseMoveEvent?

[Sriu1]

@medyakovvit
No its child's

[SGaist]

Can you show the complete code ?

[Sriu1]

@SGaist

void ChildWidget::mouseMoveEvent(QMouseEvent* event)
{

if (event->buttons() & Qt::LeftButton)
{
QRect r=this->geometry();

   if(r.contains(event->globalPos()))//Also tried event->pos()
    {
        qDebug()<<"point inside";
    }
    else
    {
      qDebug()<<"point outside";
    }

}

QWidget::mouseMoveEvent(event);

}

If the child widget starts at 0,0 works fine...If child widget is not at origin "point outside" will be printed even if the pos is inside.Tried making point global.

[J.Hilk]

@Sriu1 said in How to mapToGlobal a QRect?:

If the child widget starts at 0,0 works fine...If child widget is not at origin "point outside" will be printed even if the pos is inside.Tried making point global.

It's been a while since I used this, but mapToGlobal should work just fine!?

> void ChildWidget::mouseMoveEvent(QMouseEvent* event)
 {
 
   if (event->buttons() & Qt::LeftButton)
   {
        qDebug() << "Position relative to ChildWidget:" << objectName() << event->pos();
        qDebug() << "Position relative to physical screen:" << objectName() << mapToGlobal(event->pos());
   }

 }

[Sriu1]

@J.Hilk Hi,
event()->globalPos() and mapToGlobal(event->pos()) both give same.My problem was with rect.contains().how to map the rect of childWidget to global? So that even if event is occuring anywhere in the screen I should be able to know if its inside the qrect or outside

[J.Hilk]

@Sriu1 said in How to mapToGlobal a QRect?:

@J.Hilk Hi,
event()->globalPos() and mapToGlobal(event->pos()) both give same.My problem was with rect.contains().how to map the rect of childWidget to global? So that even if event is occuring anywhere in the screen I should be able to know if its inside the qrect or outside

Well, the same way.

QRect r=this->geometry();
QRect globalRect(mapToGlobal( r.pos() ), r.size() );

[Sriu1]

@J.Hilk Hi,
I tried this
QRect r=this->geometry();
QPoint p(r.x(),r.y());
QRect globalRect(mapToGlobal(p, r.size());

getting error
no matching function for call to ‘ChildWidget::mapToGlobal(QPoint&, QSize)’
QRect globalRect(mapToGlobal(p, r.size());

[J.Hilk]

@Sriu1 there was a )missing in my example,

[Sriu1]

@J.Hilk
Still getting....
error: no matching function for call to ‘ChildWidget::mapToGlobal(QPoint&, QSize)’
QRect globalRect(mapToGlobal(p, r.size()));

QRect r=this->geometry();
QPoint p(r.x(),r.y());
QRect globalRect(mapToGlobal(p, r.size()));

if(!r.contains(event->globalPos()))

[J.Hilk]

@Sriu1 again,
look at the parenthesis, mapToGlobal expects 1 argument, a Qpoint, and returns the maped point, you try to pass it a Qpoint and QSize!

[Sriu1]

@J-Hilk
Compiled.. But still I'm getting "point outside" event if its inside.