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Tk_WindowId(3)	      Tk Library Procedures	   Tk_WindowId(3)

_________________________________________________________________

NAME
       Tk_WindowId,    Tk_Parent,   Tk_Display,	  Tk_DisplayName,
       Tk_ScreenNumber,	  Tk_Screen,   Tk_X,   Tk_Y,	Tk_Width,
       Tk_Height,    Tk_Changes,    Tk_Attributes,   Tk_IsMapped,
       Tk_IsTopLevel, Tk_ReqWidth, Tk_ReqHeight,  Tk_InternalBor-
       derWidth,  Tk_Visual,  Tk_Depth,	 Tk_Colormap   - retrieve
       information from Tk's local data structure

SYNOPSIS
       #include <tk.h>

       Window
       Tk_WindowId(tkwin)

       Tk_Window
       Tk_Parent(tkwin)

       Display *
       Tk_Display(tkwin)

       char *
       Tk_DisplayName(tkwin)

       int
       Tk_ScreenNumber(tkwin)

       Screen *
       Tk_Screen(tkwin)

       int
       Tk_X(tkwin)

       int
       Tk_Y(tkwin)

       int
       Tk_Width(tkwin)

       int
       Tk_Height(tkwin)

       XWindowChanges *
       Tk_Changes(tkwin)

       XSetWindowAttributes *
       Tk_Attributes(tkwin)

       int
       Tk_IsMapped(tkwin)

       int
       Tk_IsTopLevel(tkwin)

Tk								1

Tk_WindowId(3)	      Tk Library Procedures	   Tk_WindowId(3)

       int
       Tk_ReqWidth(tkwin)

       int
       Tk_ReqHeight(tkwin)

       int
       Tk_InternalBorderWidth(tkwin)

       Visual *
       Tk_Visual(tkwin)

       int
       Tk_Depth(tkwin)

       Colormap
       Tk_Colormap(tkwin)

ARGUMENTS
       Tk_Window   tkwin   (in)	     Token for window.
_________________________________________________________________

DESCRIPTION
       Tk_WindowID and the  other  names  listed  above	 are  all
       macros  that  return fields from Tk's local data structure
       for tkwin.  None of these macros requires any  interaction
       with  the server;  it is safe to assume that all are fast.

       Tk_WindowId returns the X identifier for tkwin, or NULL if
       no X window has been created for tkwin yet.

       Tk_Parent  returns  Tk's	 token	for the logical parent of
       tkwin.  The parent is the token that  was  specified  when
       tkwin was created, or NULL for main windows.

       Tk_Display returns a pointer to the Xlib display structure
       corresponding to tkwin.	Tk_DisplayName returns	an  ASCII
       string	identifying   tkwin's  display.	  Tk_ScreenNumber
       returns the index of tkwin's screen among all the  screens
       of  tkwin's  display.   Tk_Screen returns a pointer to the
       Xlib structure corresponding to tkwin's screen.

       Tk_X, Tk_Y, Tk_Width,  and  Tk_Height  return  information
       about  tkwin's  location	 within	 its parent and its size.
       The location information refers to the upper-left pixel in
       the  window, or its border if there is one.  The width and
       height information refers to the interior size of the win-
       dow,  not  including  any  border.   Tk_Changes	returns a
       pointer to a structure containing all of the above  infor-
       mation  plus  a few other fields.  Tk_Attributes returns a
       pointer to an  XSetWindowAttributes  structure  describing
       all of the attributes of the tkwin's window, such as back-
       ground pixmap, event mask, and so on (Tk	 keeps	track  of

Tk								2

Tk_WindowId(3)	      Tk Library Procedures	   Tk_WindowId(3)

       all this information as it is changed by the application).
       Note: it is essential that applications use Tk  procedures
       like  Tk_ResizeWindow  instead  of  X procedures like XRe-
       sizeWindow, so that Tk can keep its data structures up-to-
       date.

       Tk_IsMapped  returns  a	non-zero value if tkwin is mapped
       and zero if tkwin isn't mapped.

       Tk_IsTopLevel returns a non-zero value if tkwin is a  top-
       level  window  (its  X  parent  is  the root window of the
       screen) and zero if tkwin isn't a top-level window.

       Tk_ReqWidth and Tk_ReqHeight return information about  the
       window's	 requested  size.  These values correspond to the
       last call to Tk_GeometryRequest for tkwin.

       Tk_InternalBorderWidth returns the width of internal  bor-
       der that has been requested for tkwin, or 0 if no internal
       border was requested.  The return value is simply the last
       value passed to Tk_SetInternalBorder for tkwin.

       Tk_Visual,  Tk_Depth,  and  Tk_Colormap return information
       about the visual characteristics of a  window.	Tk_Visual
       returns	the  visual type for the window, Tk_Depth returns
       the number of bits per pixel, and Tk_Colormap returns  the
       current	colormap for the window.  The visual characteris-
       tics are normally set from the defaults for  the	 window's
       screen,	but  they may be overridden by calling Tk_SetWin-
       dowVisual.

KEYWORDS
       attributes, colormap,  depth,  display,	height,	 geometry
       manager,	 identifier, mapped, requested size, screen, top-
       level, visual, width, window, x, y

Tk								3

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