[Tcl-bugs] [ tktoolkit-Patches-1162739 ] Use StaticGravity for win_ and bit_ gravity

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Patches item #1162739, was opened at 2005-03-13 18:52
Message generated for change (Tracker Item Submitted) made by Item Submitter
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Category: 67. Unix Window Operations
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Joe English (jenglish)
Assigned to: Joe English (jenglish)
Summary: Use StaticGravity for win_ and bit_ gravity

Initial Comment:
Tk currently uses NorthWestGravity for the win_gravity
and bit_gravity window attributes.  This makes
interactive resizing less smooth than it ought to be.

The problem is most visible in panedwindows with
'-opaqueresize true' -- as you drag the sash up and
down, the opposite border and window contents may
jiggle, shake, and jump around.

What's happening is: when the panedwindow sets the new
geometry of the slave, the X server shifts the existing
contents according to the bit_gravity and/or
win_gravity attributes (depending on whether the window
is directly managed by the panedwindow or is a
descendant of the pane slave).   Then a split-second
later, the window redraws itself, this time with the
correct geometry.

Attached patch changes Tk to use StaticGravity for both
attributes; this hint tells the X server to leave the
pixels where they are when the window is resized.

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https://sourceforge.net/tracker/?func=detail&atid=312997&aid=1162739&group_id=12997