Centering child window in parent

[squidge]

When opening a child window, I want the default behavior to open the window in the center of the parent window. Research suggests that I would have to calculate the childs position based on the parent geometry, but I'm sure there must be an easier way (and I'm not sure how this would work when the parent is on a different monitor to which the child opens on by default)

[Dong Back Kim]

(as a novice) I wonder whether Qt provides an interface to deal with multiple monitors and their properties (i.e. resolution and geometric relationships). If there is then it must not be that hard I believe.

[mattc]

If the child window is a QDialog, then it will be centered on the parent (exact wording from the docs is "it is centered on top of the parent's top-level widget")

For other windows, I am using the following code:

move(
    parentWidget()->window()->frameGeometry().topLeft() +
    parentWidget()->window()->rect().center() -
    rect().center());

move(
    parentWidget()->window()->frameGeometry().topLeft() +
    parentWidget()->window()->rect().center() -
    rect().center());

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