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winop - Perform assorted window operations
winop
lower ?window?...
winop map ?window?...
winop move window x y
winop raise ?window?...
winop snap window photoName
winop unmap ?window?...
winop warpto ?window?
The winop command performs various window operations on Tk windows
using low-level Xlib function calls to work around window manager pecularities.
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.
window, map, raise, lower, pointer, warp
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