xmonad：浮动窗口的默认大小

Question

To have a window placed on the floating layer as soon as it appears, one can use the doFloat function from ManageHooks . In addition there are some additional functions, like doCenterFloat for instance, that are provided by ManageHelpers .

But is there any way to specify a specific size for a window?

Right now I have an application and it just takes the whole window space. I'd like to specify a more comfortable size.

ManageHelpers does have a function called doRectFloat which takes a RationalRect . In the description for doRectFloat it states the following:

The rectangle to float the window in. 0 to 1; x, y, w, h.

But I don't know how to use this.

Answer 1

ManageHelpers does have a function called doRectFloat [...] But I don't know how to use this.

The type of doRectFloat is...

doRectFloat :: RationalRect -> ManageHook

... so you need to pass it a RationalRect (following the links in the docs usually helps in figuring out such things):

doRectFloat (RationalRect (1 % 4) (1 % 4) (1 % 2) (1 % 2))

This should produce a centered rectangle with half of the full width and length. % is used to build Rational (a type for exact fractions) values. To use it, you will need to add import Data.Ratio to the imports at the top of your xmonad.hs file.