Window aspect ratio varies depending on window size-CodePudding

I'm trying to understand how a program is determining the new width/height when resizing it.

One would think it's merely an aspect ratio like 4:3 (which would lead to a 1.333333 ish value) however as you can see in this gif, the divition width/height throws a very different result depending on the window size.

https://gyazo.com/f3d514b9bf51f49899612090868ec140

I have seen many programs behave like this. Any idea what the algorithm is behind this?

Thanks!

CodePudding user response：

A specific window size can be forced by handling the WM_WINDOWPOSCHANGING message. You get to decide the new width and height by any algorithm you desire when the user resizes the window.

CodePudding user response：

The thing that was screwing the ratio width/height was the title, that no matter the new size, was the same height, thus ruining the ratio for every new size, on taking into account the -30 px the ratio now alwasy gives the same value.

Cheers!