winop

The winop command performs various window operations on Tk windows using low-level Xlib function calls to work around window manager pecularities.

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.

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.

Winop

Name

Synopsis

Description

Introduction

Operations