Provided by: tk8.5-doc_8.5.15-2ubuntu3_all bug


       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
                                              logical 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
       window, 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
       window.   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_CreateWindowFromPath   offers   an   alternate  way  of  specifying  new  windows.   In
       Tk_CreateWindowFromPath 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_CreateWindow, 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
       creation  of  the  X  window.   The  window  will actually be created by the first call to
       Tk_MapWindow.  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,
       including   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 immediately.  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
       possible  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,