Retain mouse coordinates after Zoom in/out.

[rohit1729]

I've a central widget with scaled axes . I'm getting the coordinates by using:

x = (event->pos().x());
y = (event->pos().y());

This is working fine. After zooming in or out, the coordinates still remain same. But from the point of view of central widget, it should get changed. How do I achieve this?

[mrjj]

Hi
Well how do you zoom the central widget ?
You have to apply the same math to the mouse coordinates to
calculate a zoomed point.

[Chris Kawa]

What @mrjj said. In (pseudo) code it's simply:

QPoint newCursorPos = oldCursorPos / oldZoomFactor * newZoomFactor;

[rohit1729]

I'll restate the problem:
When I zoomed in and hover on the upper left corner, the location should NOT be 0,0 (the QMouseMouseEvent just gives me this point). I want the coordinates relative to the central widget.