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CentOS 7.0 - man page for tk_createwindowfrompath (centos section 3)

Tk_CreateWindow(3)		      Tk Library Procedures		       Tk_CreateWindow(3)


       Tk_CreateWindow, Tk_CreateWindowFromPath, Tk_DestroyWindow, Tk_MakeWindowExist - create or
       delete window

       #include <tk.h>

       Tk_CreateWindow(interp, parent, name, topLevScreen)

       Tk_CreateAnonymousWindow(interp, parent, topLevScreen)

       Tk_CreateWindowFromPath(interp, tkwin, pathName, topLevScreen)



       Tcl_Interp *interp (out) 	      Tcl interpreter to use for error reporting.  If  no
					      error occurs, then *interp is not modified.

       Tk_Window parent (in)		      Token  for the window that is to serve as the logi-
					      cal parent of the new window.

       const char *name (in)		      Name to use for this window.  Must be unique  among
					      all children of the same parent.

       const char *topLevScreen (in)	      Has  same  format as screenName.	If NULL, then new
					      window is created as an internal window.	 If  non-
					      NULL,  new  window is created as a top-level window
					      on screen  topLevScreen.	 If  topLevScreen  is  an
					      empty  string  ("")  then  new window is created as
					      top-level window of parent's screen.

       Tk_Window tkwin (in)		      Token for window.

       const char *pathName (in)	      Name of new window, specified as path  name  within
					      application (e.g. .a.b.c).

       The  procedures Tk_CreateWindow, Tk_CreateAnonymousWindow, and Tk_CreateWindowFromPath are
       used to create new windows for use in  Tk-based	applications.	Each  of  the  procedures
       returns	a  token  that	can  be  used  to  manipulate the window in other calls to the Tk
       library.  If the window could not be created  successfully,  then  NULL	is  returned  and
       interp->result is modified to hold an error message.

       Tk  supports  two different kinds of windows:  internal windows and top-level windows.  An
       internal window is an interior window of a Tk application, such as a scrollbar or menu bar
       or  button.   A top-level window is one that is created as a child of a screen's root win-
       dow, rather than as an interior window, but which is logically part of some existing  main
       window.	Examples of top-level windows are pop-up menus and dialog boxes.

       New  windows  may  be created by calling Tk_CreateWindow.  If the topLevScreen argument is
       NULL, then the new window will be an internal window.  If topLevScreen is  non-NULL,  then
       the new window will be a top-level window: topLevScreen indicates the name of a screen and
       the new window will be created as a child of the root window of topLevScreen.   In  either
       case  Tk  will consider the new window to be the logical child of parent: the new window's
       path name will reflect this fact, options may be specified for the new window  under  this
       assumption,  and  so  on.  The only difference is that new X window for a top-level window
       will not be a child of parent's X window.  For example, a pull-down menu's parent would be
       the  button-like  window used to invoke it, which would in turn be a child of the menu bar
       window.	A dialog box might have the application's main window as its parent.

       Tk_CreateAnonymousWindow differs from Tk_CreateWindow in that it creates an  unnamed  win-
       dow.   This window will be manipulable only using C interfaces, and will not be visible to
       Tcl scripts.  Both interior windows and top-level windows  may  be  created  with  Tk_Cre-

       Tk_CreateWindowFromPath	offers	an  alternate  way of specifying new windows.  In Tk_Cre-
       ateWindowFromPath the new window is specified with a token for any window  in  the  target
       application  (tkwin), plus a path name for the new window.  It produces the same effect as
       Tk_CreateWindow and allows both top-level and internal windows to be created, depending on
       the  value  of  topLevScreen.  In calls to Tk_CreateWindowFromPath, as in calls to Tk_Cre-
       ateWindow, the parent of the new window must exist at the time of the call,  but  the  new
       window must not already exist.

       The  window creation procedures do not actually issue the command to X to create a window.
       Instead, they create a local data structure associated with the window and defer the  cre-
       ation  of  the X window.  The window will actually be created by the first call to Tk_Map-
       Window.	Deferred window creation allows various aspects of the window (such as its  size,
       background  color,  etc.) to be modified after its creation without incurring any overhead
       in the X server.  When the window is finally mapped all of the window  attributes  can  be
       set while creating the window.

       The  value  returned  by a window-creation procedure is not the X token for the window (it
       cannot be, since X has not been asked to create the window yet).  Instead, it is  a  token
       for  Tk's  local  data  structure  for the window.  Most of the Tk library procedures take
       Tk_Window tokens, rather than X identifiers.   The  actual  X  window  identifier  can  be
       retrieved from the local data structure using the Tk_WindowId macro;  see the manual entry
       for Tk_WindowId for details.

       Tk_DestroyWindow deletes a window and all the data structures associated with it,  includ-
       ing  any event handlers created with Tk_CreateEventHandler.  In addition, Tk_DestroyWindow
       will delete any children of tkwin recursively (where children are defined in the Tk sense,
       consisting of all windows that were created with the given window as parent).  If tkwin is
       an internal window, then event handlers interested in destroy events are  invoked  immedi-
       ately.	If  tkwin  is a top-level or main window, then the event handlers will be invoked
       later, after X has seen the request and returned an event for it.

       If a window has been created but has not been mapped, so no X window exists, it is  possi-
       ble  to	force the creation of the X window by calling Tk_MakeWindowExist.  This procedure
       issues the X commands to instantiate the window given by tkwin.

       create, deferred creation, destroy, display, internal window,  screen,  top-level  window,

Tk					       4.2			       Tk_CreateWindow(3)

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