multiply the coordinates by the screen resolutions ratio?

multiply the coordinates by the screen resolutions ratio?

that would give us percentage rates, which is not accurate.

Do you want the retain the absolute coordinates (i.e. x:60,y:10 on machine1 is x:60,y:10 on machine2) or relative coordinates (i.w. x:25%,y50% on machine1 is x:25%,y50% on machine 2)? I'm assuming the latter so I'm not sure what the issue is with the thrust of 3TATUK2's suggestion. Working with coordinates in normalized form (i.e. [0,1] or [-1,+1]) would be the obvious solution as you can map these values to whatever size/resolution you want with more than enough accuracy but I guess I must be missing something?

I don't think so, what I was afraid of, and what the fellows told me was if the resolution and monitor sizes differ, relative or percentage values could not be accurate.

for example, x:60 y:10 on a machine one with resolution: 1024:768 19 inch may not absolutely refer to the same point on machine 2 with resolution: 1360:768 same size.

By the way, we came to an agreement to use the same widget size and resolution for two machines. However, I still like to know if the relative case can also direct me towards accurate results.

it'll be accurate. monitor size doesn't matter.

(60,10) on 1024x768 will be (80,10) on 1360x768

At most you'll have a pixel offset of inaccuracy due to fractional component... but that shouldn't matter in practice, unless you could cook up some amazingly superb reason which would just happen to not based on practical experience :)

it'll be accurate. monitor size doesn't matter.

(60,10) on 1024x768 will be (80,10) on 1360x768

At most you'll have a pixel offset of inaccuracy due to fractional component... but that shouldn't matter in practice, unless you could cook up some amazingly superb reason which would just happen to not based on practical experience

How do you calculate it?

I am looking for a general conversion function, is the below correct?

QPoint point = event->globalPos();
QSize size = qApp->desktop()->screen()->size();
point.setX(100 * point.x() / size.width());
point.setY(100 * point.y() / size.height());

reverse:

    QPoint point;
    // receive point
     
    QSize size = qApp->desktop()->screen()->size();
    point.setX(size.width() * point.x() / 100);
    point.setY(size.height() * point.y() / 100);
     
    //use the point

// Assumes all values are floats so cast appropriately if not...
float relativeX = mouseX / screenWidth;
float relativeY = mouseY / screenHeight;

float absoluteX = relativeX * screenWidth;
float absoluteY = relativeY * screenHeight;