NAME¶
winop - Perform assorted window operations
SYNOPSIS¶
winop lower ?
window?...
winop map ?
window?...
winop move window x y
winop raise ?
window?...
winop snap window photoName
winop unmap ?
window?...
winop warpto ?
window?
DESCRIPTION¶
The
winop command performs various window operations on Tk windows using
low-level Xlib function calls to work around window manager peculiarities.
INTRODUCTION¶
Tk has several commands for manipulating its windows:
raise,
lower,
wm, etc. These commands ask the window manager to perform
operations on Tk windows. In some cases, a particular window manager won't
perform the operation as expected.
For example, if you positioned a toplevel window using
wm geometry, the
window may not actually be at those particular coordinates. The position of
the window may be offset by dimensions of the title bar added by the window
manager.
In situations like these, the
winop command can be used to workaround
these difficulties. Instead, it makes low-level Xlib (such
XRaiseWindow
and
XMapWindow) calls to perform these operations.
toplevel .top
wm withdraw .top
# Set the geometry to make the window manager
# place the window.
wm geometry .top +100+100
# Move the window to the desired location
# and "update" to force the window manager
# to recognize it.
winop move .top 100 100
update
wm deiconify .top
winop move .top 100 100
OPERATIONS¶
The following operations are available for the
winop command:
- winop lower ?window?...
- Lowers window to the bottom of the X window stack.
Window is the path name of a Tk window.
- winop map ?window?...
- Maps window on the screen. Window is the path
name of a Tk window. If window is already mapped, this command has
no effect.
- winop move window x y
- Move window to the screen location specified by
x and y. Window is the path name of a Tk window,
while x and y are screen coordinates. This command returns
the empty string.
- winop raise ?window?...
- Raises window to the top of the X window stack.
Window must be a valid path name of a Tk window. This command
returns the empty string.
- winop snap window photoName
- Takes a snapshot of the window and stores the
contents in the photo image photoName. Window is the valid
path name of a Tk window which must be totally visible (unobscured).
PhotoName is the name of a Tk photo image which must already exist.
This command can fail if the window is obscured in any fashion, such as
covered by another window or partially offscreen. In that case, an error
message is returned.
- winop unmap ?window?...
- Unmaps window from the screen. Window is the
path name of a Tk window.
- winop warpto ?window?
- Warps the pointer to window. Window is the
path name of a Tk window which must be mapped. If window is in the
form @x,y, where x and y are root screen coordinates,
the pointer is warped to that location on the screen.
[ I've never heard a good case for warping the pointer in an
application. It can be useful for testing, but in applications,
it's always a bad idea. Simply stated, the user owns the pointer,
not the application. If you have an application that needs it, I'd
like to hear about it.]
If no window argument is present the current location of the pointer
is returned. The location is returned as a list in the form " x
y", where x and y are the current coordinates of
the pointer.
KEYWORDS¶
window, map, raise, lower, pointer, warp