Gravity - Afterstep Gravity
- Center
-
when window decorations are added to client window - window is
moved so that center of the resulting framed window will be in the same
location as the center of mapped client window without decorations.
- East
-
Decorated window is moved so that its right side is located at
same position as right side of undecorated client window.
- North
-
Decorated window is moved so that its top side is located at
same position as top side of undecorated client window.
- NorthEast
-
Decorated window is moved so that its right-top corner is
located at same position as right-top corner of undecorated client
window.
- NorthWest
-
Decorated window is moved so that its left-top corner is
located at same position as left-top corner of undecorated client
window.
- South
-
Decorated window is moved so that its bottom side is located
at same position as bottom side of undecorated client window.
- SouthEast
-
Decorated window is moved so that its right-bottom corner is
located at same position as right-bottom corner of undecorated client
window.
- SouthWest
-
Decorated window is moved so that its left-bottom corner is
located at same position as left-bottom corner of undecorated client
window.
- Static
-
when window decorations are added to client window - frame
window is moved so that client window remains in exact position it was
mapped at.
- West
-
Decorated window is moved so that its left side is located at
same position as left side of undecorated client window.
When client window is mapped on screen - Window Manager draws some frame
decorations around it, such as Titlebar, resize handles, etc. As such
decorations take additional space, it is nesseccary to specify if resulting
larger window should be moved on screen in any particular direction in order
to compensate for discrepancy in size. This is determined by Gravity hint.
Usually Gravity is set by client itself, depending on geometry
specified by the user. For example geometry -10+100 will set gravity to
NorthEast, while +10+100 will set gravity to NorthWest. Sometimes this
gravity setting requested by application is incorrect though, due to
longstanding tradition of misinterpretation of its meaning. In this cases it
may be desired to override gravity. AfterStep users can accomplish that
using database file, and definig new Style for specific application with
Gravity attribute set. For example it is recommended to set gravity of
popular image viewver XV to be Static, as it tends to move self assuming
that it knows everything.
Below are the list of possible gravity values with explanation of
its meaning.