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.