NAME

       Tk_ManageGeometry - arrange to handle geometry requests for a window

SYNOPSIS

       #include <tk.h>

       Tk_ManageGeometry(tkwin, mgrPtr, clientData)

ARGUMENTS

       Tk_Window tkwin (in)                     Token for window to be managed.

       const Tk_GeomMgr *mgrPtr (in)            Pointer  to data structure containing information
                                                about the geometry manager, or NULL  to  indicate
                                                that  tkwin's  geometry  should  not  be  managed
                                                anymore.  The data structure pointed to by mgrPtr
                                                must  be  static:  Tk  keeps a reference to it as
                                                long as the window is managed.

       ClientData clientData (in)               Arbitrary one-word  value  to  pass  to  geometry
                                                manager callbacks.
_________________________________________________________________

DESCRIPTION

       Tk_ManageGeometry  arranges  for  a  particular  geometry manager, described by the mgrPtr
       argument, to control the geometry of a particular slave window, given by tkwin.  If  tkwin
       was  previously managed by some other geometry manager, the previous manager loses control
       in favor of the new one.  If mgrPtr is NULL, geometry management is cancelled for tkwin.

       The structure pointed to by mgrPtr contains information about the geometry manager:
              typedef struct {
                  const char *name;
                  Tk_GeomRequestProc *requestProc;
                  Tk_GeomLostSlaveProc *lostSlaveProc;
              } Tk_GeomMgr;
       The name field is the textual name for the geometry manager, such as pack or place;   this
       value will be returned by the command winfo manager.

       requestProc  is  a  procedure  in  the  geometry  manager  that  will  be invoked whenever
       Tk_GeometryRequest is called by the slave to change  its  desired  geometry.   requestProc
       should have arguments and results that match the type Tk_GeomRequestProc:
              typedef void Tk_GeomRequestProc(
                  ClientData clientData,
                  Tk_Window tkwin);
       The  parameters to requestProc will be identical to the corresponding parameters passed to
       Tk_ManageGeometry.  clientData usually points to a data structure containing  application-
       specific information about how to manage tkwin's geometry.

       The lostSlaveProc field of mgrPtr points to another procedure in the geometry manager.  Tk
       will invoke lostSlaveProc if some other manager calls  Tk_ManageGeometry  to  claim  tkwin
       away from the current geometry manager.  lostSlaveProc is not invoked if Tk_ManageGeometry
       is called with a NULL value for mgrPtr (presumably the current geometry manager  has  made
       this  call, so it already knows that the window is no longer managed), nor is it called if
       mgrPtr is the same as the window's current geometry manager.   lostSlaveProc  should  have
       arguments and results that match the following prototype:
              typedef void Tk_GeomLostSlaveProc(
                  ClientData clientData,
                  Tk_Window tkwin);
       The  parameters  to lostSlaveProc will be identical to the corresponding parameters passed
       to Tk_ManageGeometry.

KEYWORDS

       callback, geometry, managed, request, unmanaged