ManageGeom man page on OSF1

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Tk_ManageGeometry(3)	     Tk Library Procedures	  Tk_ManageGeometry(3)

______________________________________________________________________________

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 man‐
						aged.

       Tk_GeomMgr	 *mgrPtr      (in)	Pointer to data structure con‐
						taining	 information about the
						geometry manager, or  NULL  to
						indicate that tkwin's geometry
						shouldn't 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 call‐
						backs.
_________________________________________________________________

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 geom‐
       etry manager:
	      typedef struct {
		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 man‐
       ager.

       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  cur‐
       rent 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

Tk				      4.0		  Tk_ManageGeometry(3)
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