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спецификации, руководства, описания, API
Spec-Zone .ru
спецификации, руководства, описания, API
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wm(n)                                       Tk Built-In Commands                                       wm(n)



____________________________________________________________________________________________________________

NAME
       wm - Communicate with window manager

SYNOPSIS
       wm option window ?args?
____________________________________________________________________________________________________________

DESCRIPTION
       The  wm command is used to interact with window managers in order to control such things as the title
       for a window, its geometry, or the increments in terms of which it may be resized.   The  wm  command
       can  take  any  of  a  number of different forms, depending on the option argument.  All of the forms
       expect at least one additional argument, window, which must be the path name of a top-level window.

       The legal forms for the wm command are:

       wm aspect window ?minNumer minDenom maxNumer maxDenom?
              If minNumer, minDenom, maxNumer, and maxDenom are all specified, then they will be  passed  to
              the  window  manager  and  the window manager should use them to enforce a range of acceptable
              aspect ratios for window.  The aspect ratio of window (width/length) will  be  constrained  to
              lie  between  minNumer/minDenom  and maxNumer/maxDenom.  If minNumer etc. are all specified as
              empty strings, then any existing aspect ratio restrictions are removed.  If minNumer etc.  are
              specified,  then  the  command returns an empty string.  Otherwise, it returns a Tcl list con-taining containing
              taining four elements, which are the current values of minNumer, minDenom, maxNumer, and  max-Denom maxDenom
              Denom (if no aspect restrictions are in effect, then an empty string is returned).

       wm attributes window

       wm attributes window ?option?

       wm attributes window ?option value option value...?
              This  subcommand  returns  or  sets platform specific attributes associated with a window. The
              first form returns a list of the platform specific flags and their  values.  The  second  form
              returns  the value for the specific option. The third form sets one or more of the values. The
              values are as follows:

              All platforms support the following attributes (though X11 users should see the notes below):

              -fullscreen
                     Places the window in a mode that takes up the entire screen, has no borders, and covers
                     the  general use area (i.e. Start menu and taskbar on Windows, dock and menubar on OSX,
                     general window decorations on X11).

              -topmost
                     Specifies whether this is a topmost window (displays above all other windows).

              On Windows, the following attributes may be set.

              -alpha Specifies the alpha transparency level of the toplevel.  It accepts a  value  from  0.0 |
                     (fully  transparent)  to  1.0 (opaque).  Values outside that range will be constrained. |
                     This is supported on Windows 2000/XP+.  Where not supported, the -alpha  value  remains |
                     at 1.0.

              -disabled
                     Specifies whether the window is in a disabled state.

              -toolwindow
                     Specifies a toolwindow style window (as defined in the MSDN).

              -transparentcolor
                     Specifies  the  transparent  color  index  of  the  toplevel.  It takes any color value |
                     accepted by Tk_GetColor.  If the empty string is specified  (default),  no  transparent |
                     color  is  used.   This  is  supported  on  Windows 2000/XP+.  Where not supported, the |
                     -transparentcolor value remains at {}.

              On Mac OS X, the following attributes may be set.

              -alpha Specifies the alpha transparency level of the window.  It  accepts  a  value  from  0.0
                     (fully transparent) to 1.0 (opaque), values outside that range will be constrained.

              -modified
                     Specifies  the  modification  state  of the window (determines whether the window close
                     widget contains the modification indicator and whether the proxy icon is draggable).

              -notify
                     Specifies process notification state (bouncing of the application dock icon).

              -titlepath
                     Specifies the path of the file referenced as  the  window  proxy  icon  (which  can  be
                     dragged and dropped in lieu of the file's finder icon).

              -transparent
                     Makes  the  window  content  area  transparent and turns off the window shadow. For the
                     transparency to be effecive, the toplevel background needs to be set to  a  color  with
                     some alpha, e.g.  "systemTransparent".

              On  X11, the following attributes may be set.  These are not supported by all window managers,
              and will have no effect under older WMs.

              -zoomed
                     Requests that the window should be maximized.  This is the same as wm state  zoomed  on
                     Windows and Mac OS X.

              On  X11,  changes to window attributes are performed asynchronously.  Querying the value of an
              attribute returns the current state, which will not be the same as the value most recently set
              if  the  window  manager  has  not  yet  processed  the  request or if it does not support the
              attribute.

       wm client window ?name?
              If name is specified, this command stores name (which should be the name of the host on  which
              the  application  is  executing)  in window's WM_CLIENT_MACHINE property for use by the window
              manager or session manager.  The command returns an empty string in this case.  If name is not
              specified,  the  command returns the last name set in a wm client command for window.  If name
              is specified as an empty string, the command deletes the WM_CLIENT_MACHINE property from  win-dow. window.
              dow.

       wm colormapwindows window ?windowList?
              This  command  is used to manipulate the WM_COLORMAP_WINDOWS property, which provides informa-tion information
              tion to the window managers about windows that have private colormaps.

              If windowList is not specified, the command returns a list whose elements are the names of the
              windows  in  the  WM_COLORMAP_WINDOWS  property.  If windowList is specified, it consists of a
              list of window path names;  the command overwrites the WM_COLORMAP_WINDOWS property  with  the
              given  windows  and returns an empty string.  The WM_COLORMAP_WINDOWS property should normally
              contain a list of the internal windows within window whose colormaps differ  from  their  par-ents. parents.
              ents.

              The  order  of the windows in the property indicates a priority order: the window manager will
              attempt to install as many colormaps as possible from the head of this list when  window  gets
              the  colormap focus.  If window is not included among the windows in windowList, Tk implicitly
              adds it at the end of the WM_COLORMAP_WINDOWS property, so that its colormap is lowest in pri-ority. priority.
              ority.   If wm colormapwindows is not invoked, Tk will automatically set the property for each
              top-level window to all the internal windows whose colormaps differ from their  parents,  fol-lowed followed
              lowed by the top-level itself;  the order of the internal windows is undefined.  See the ICCCM
              documentation for more information on the WM_COLORMAP_WINDOWS property.

       wm command window ?value?
              If value is specified, this command stores value in window's WM_COMMAND property  for  use  by
              the  window  manager  or  session manager and returns an empty string.  Value must have proper
              list structure;  the elements should contain the words of  the  command  used  to  invoke  the
              application.   If  value  is not specified then the command returns the last value set in a wm
              command command for window.  If value is specified as an empty string, the command deletes the
              WM_COMMAND property from window.

       wm deiconify window
              Arrange  for  window  to be displayed in normal (non-iconified) form.  This is done by mapping
              the window.  If the window has never been mapped then this command will not  map  the  window,
              but  it  will ensure that when the window is first mapped it will be displayed in de-iconified
              form.  On Windows, a deiconified window will also be raised and be given the focus  (made  the
              active window).  Returns an empty string.

       wm focusmodel window ?active|passive?
              If active or passive is supplied as an optional argument to the command, then it specifies the
              focus model for window.  In this case the command returns an empty string.  If  no  additional
              argument is supplied, then the command returns the current focus model for window.

              An  active  focus model means that window will claim the input focus for itself or its descen-dants, descendants,
              dants, even at times when the focus is currently in some  other  application.   Passive  means
              that  window  will never claim the focus for itself:  the window manager should give the focus
              to window at appropriate times.  However, once the focus has been given to window  or  one  of
              its  descendants,  the  application  may  re-assign the focus among window's descendants.  The
              focus model defaults to passive, and Tk's focus command assumes a passive model of focusing.

       wm forget window
              The window will be unmapped from the screen and will no longer be managed by wm.  Windows cre-ated created
              ated with the toplevel command will be treated like frame windows once they are no longer man-aged managed
              aged by wm, however, the -menu configuration will be remembered and the menus will return once
              the widget is managed again.

       wm frame window
              If  window  has  been  reparented  by  the window manager into a decorative frame, the command
              returns the platform specific window identifier for the outermost frame that  contains  window
              (the  window  whose parent is the root or virtual root).  If window has not been reparented by
              the window manager then the command returns the platform specific window identifier  for  win-dow. window.
              dow.

       wm geometry window ?newGeometry?
              If  newGeometry  is  specified,  then the geometry of window is changed and an empty string is
              returned.  Otherwise the current geometry for window is returned  (this  is  the  most  recent
              geometry  specified  either  by manual resizing or in a wm geometry command).  NewGeometry has
              the form =widthxheight+-x+-y, where any of =, widthxheight, or +-x+-y may be  omitted.   Width
              and  height  are  positive integers specifying the desired dimensions of window.  If window is
              gridded (see GRIDDED GEOMETRY MANAGEMENT below) then the  dimensions  are  specified  in  grid
              units;  otherwise they are specified in pixel units.

              X  and y specify the desired location of window on the screen, in pixels.  If x is preceded by
              +, it specifies the number of pixels between the left edge of the screen and the left edge  of
              window's  border;   if  preceded  by - then x specifies the number of pixels between the right
              edge of the screen and the right edge of window's border.  If y is preceded by + then it spec-ifies specifies
              ifies the number of pixels between the top of the screen and the top of window's border;  if y
              is preceded by - then it specifies the number of pixels between the bottom of window's  border
              and the bottom of the screen.

              If  newGeometry  is specified as an empty string then any existing user-specified geometry for
              window is cancelled, and the window will revert to the size requested internally by  its  wid-gets. widgets.
              gets.

       wm grid window ?baseWidth baseHeight widthInc heightInc?
              This  command  indicates  that window is to be managed as a gridded window.  It also specifies
              the relationship between grid units and pixel units.  BaseWidth  and  baseHeight  specify  the
              number  of  grid  units  corresponding  to the pixel dimensions requested internally by window
              using Tk_GeometryRequest.  WidthInc and heightInc specify the number of pixels in  each  hori-zontal horizontal
              zontal  and  vertical  grid unit.  These four values determine a range of acceptable sizes for
              window, corresponding to grid-based widths and heights that  are  non-negative  integers.   Tk
              will  pass this information to the window manager;  during manual resizing, the window manager
              will restrict the window's size to one of these acceptable sizes.

              Furthermore, during manual resizing the window manager will display the window's current  size
              in  terms  of  grid  units  rather  than pixels.  If baseWidth etc. are all specified as empty
              strings, then window will no longer be managed as a gridded window.   If  baseWidth  etc.  are
              specified then the return value is an empty string.

              Otherwise the return value is a Tcl list containing four elements corresponding to the current
              baseWidth, baseHeight, widthInc, and heightInc;  if window is not currently gridded,  then  an
              empty string is returned.

              Note: this command should not be needed very often, since the Tk_SetGrid library procedure and
              the setGrid option provide easier access to the same functionality.

       wm group window ?pathName?
              If pathName is specified, it gives the path name for the leader of a group of related windows.
              The  window  manager  may  use this information, for example, to unmap all of the windows in a
              group when the group's leader is iconified.  PathName may be specified as an empty  string  to
              remove  window  from any group association.  If pathName is specified then the command returns
              an empty string;  otherwise it returns the path name of window's current group leader,  or  an
              empty string if window is not part of any group.

       wm iconbitmap window ?bitmap?
              If  bitmap  is specified, then it names a bitmap in the standard forms accepted by Tk (see the
              Tk_GetBitmap manual entry for details).  This bitmap is passed to the  window  manager  to  be
              displayed  in  window's  icon, and the command returns an empty string.  If an empty string is
              specified for bitmap, then any current icon bitmap is cancelled  for  window.   If  bitmap  is
              specified then the command returns an empty string.  Otherwise it returns the name of the cur-rent current
              rent icon bitmap associated with window, or an empty string if window has no icon bitmap.   On
              the Windows operating system, an additional flag is supported:

              wm iconbitmap window ?-default? ?image?
                     If  the  -default  flag is given, the icon is applied to all toplevel windows (existing
                     and future) to which no other specific icon has yet been applied.  In addition to  bit-map bitmap
                     map  image  types, a full path specification to any file which contains a valid Windows
                     icon is also accepted (usually .ico or .icr files), or any file for which the shell has
                     assigned  an icon.  Tcl will first test if the file contains an icon, then if it has an
                     assigned icon, and finally, if that fails, test for a bitmap.

       wm iconify window
              Arrange for window to be iconified.  It window has not yet been mapped  for  the  first  time,
              this  command  will  arrange  for  it  to  appear in the iconified state when it is eventually
              mapped.

       wm iconmask window ?bitmap?
              If bitmap is specified, then it names a bitmap in the standard forms accepted by Tk  (see  the
              Tk_GetBitmap  manual  entry  for  details).  This bitmap is passed to the window manager to be
              used as a mask in conjunction with the iconbitmap option:  where the mask has zeroes  no  icon
              will be displayed;  where it has ones, the bits from the icon bitmap will be displayed.  If an
              empty string is specified for bitmap then any current icon mask is cancelled for window  (this
              is  equivalent  to  specifying a bitmap of all ones).  If bitmap is specified then the command
              returns an empty string.  Otherwise it returns the name of the current  icon  mask  associated
              with window, or an empty string if no mask is in effect.

       wm iconname window ?newName?
              If  newName  is specified, then it is passed to the window manager;  the window manager should
              display newName inside the icon associated with window.  In  this  case  an  empty  string  is
              returned  as  result.   If  newName is not specified then the command returns the current icon
              name for window, or an empty string if no icon name has been specified (in this case the  win-dow window
              dow manager will normally display the window's title, as specified with the wm title command). |

       wm iconphoto window ?-default? image1 ?image2                                                         |
       ...?                                                    |                                             |
              Sets  the titlebar icon for window based on the named photo images.  If -default is specified, |
              this is applied to all future created toplevels as well.  The data in the images is taken as a |
              snapshot at the time of invocation.  If the images are later changed, this is not reflected to |
              the titlebar icons.  Multiple images are accepted to allow different images sizes (e.g., 16x16 |
              and 32x32) to be provided. The window manager may scale provided icons to an appropriate size. |

              On Windows, the images are packed into a Windows icon structure.  This will  override  an  ico |
              specified to wm iconbitmap, and vice versa.                                                    |

              On  X, the images are arranged into the _NET_WM_ICON X property, which most modern window man- |
              agers support.  A wm iconbitmap may exist simultaneously.  It is recommended to use  not  more |
              than 2 icons, placing the larger icon first.                                                   |

              On Macintosh, this currently does nothing.

       wm iconposition window ?x y?
              If x and y are specified, they are passed to the window manager as a hint about where to posi-tion position
              tion the icon for window.  In this case an empty string is returned.  If x and y are specified
              as  empty  strings  then  any existing icon position hint is cancelled.  If neither x nor y is
              specified, then the command returns a Tcl list containing two values, which  are  the  current
              icon position hints (if no hints are in effect then an empty string is returned).

       wm iconwindow window ?pathName?
              If  pathName  is  specified,  it is the path name for a window to use as icon for window: when
              window is iconified then pathName will be mapped to serve as icon,  and  when  window  is  de-iconified deiconified
              iconified  then  pathName will be unmapped again.  If pathName is specified as an empty string
              then any existing icon window association for window will be cancelled.  If the pathName argu-ment argument
              ment  is  specified  then an empty string is returned.  Otherwise the command returns the path
              name of the current icon window for window, or an empty string if there is no icon window cur-rently currently
              rently  specified for window.  Button press events are disabled for window as long as it is an
              icon window;  this is needed in order to allow window managers to "own" those  events.   Note:
              not all window managers support the notion of an icon window.

       wm manage widget
              The widget specified will become a stand alone top-level window.  The window will be decorated
              with the window managers title bar, etc. Only frame, labelframe and toplevel  widgets  can  be
              used with this command. Attempting to pass any other widget type will raise an error. Attempt-ing Attempting
              ing to manage a toplevel widget is benign and achieves nothing. See also GEOMETRY  MANAGEMENT.

       wm maxsize window ?width height?
              If  width  and  height are specified, they give the maximum permissible dimensions for window.
              For gridded windows the dimensions are specified in grid units;  otherwise they are  specified
              in  pixel  units.  The window manager will restrict the window's dimensions to be less than or
              equal to width and height.  If width and height are specified, then  the  command  returns  an
              empty  string.  Otherwise it returns a Tcl list with two elements, which are the maximum width
              and height currently in effect.  The maximum size defaults to the size of the screen.  See the
              sections on geometry management below for more information.

       wm minsize window ?width height?
              If  width  and  height are specified, they give the minimum permissible dimensions for window.
              For gridded windows the dimensions are specified in grid units;  otherwise they are  specified
              in  pixel  units.  The window manager will restrict the window's dimensions to be greater than
              or equal to width and height.  If width and height are specified, then the command returns  an
              empty  string.  Otherwise it returns a Tcl list with two elements, which are the minimum width
              and height currently in effect.  The minimum size defaults to one  pixel  in  each  dimension.
              See the sections on geometry management below for more information.

       wm overrideredirect window ?boolean?
              If boolean is specified, it must have a proper boolean form and the override-redirect flag for
              window is set to that value.  If boolean is not specified then 1 or 0 is returned to  indicate
              whether  or not the override-redirect flag is currently set for window.  Setting the override-redirect overrideredirect
              redirect flag for a window causes it to be ignored by the window manager;  among other things,
              this means that the window will not be reparented from the root window into a decorative frame
              and the user will not be able to manipulate the window using the normal window manager  mecha-nisms. mechanisms.
              nisms.

       wm positionfrom window ?who?
              If  who  is  specified,  it must be either program or user, or an abbreviation of one of these
              two.  It indicates whether window's current position was requested by the program  or  by  the
              user.   Many  window  managers  ignore program-requested initial positions and ask the user to
              manually position the window;  if user is specified then the window  manager  should  position
              the  window at the given place without asking the user for assistance.  If who is specified as
              an empty string, then the current position source is cancelled.  If who is specified, then the
              command  returns an empty string.  Otherwise it returns user or program to indicate the source
              of the window's current position, or an empty string if no  source  has  been  specified  yet.
              Most  window  managers  interpret "no source" as equivalent to program.  Tk will automatically
              set the position source to user when a wm geometry command is invoked, unless the  source  has
              been set explicitly to program.

       wm protocol window ?name? ?command?
              This command is used to manage window manager protocols such as WM_DELETE_WINDOW.  Name is the
              name of an atom corresponding to a  window  manager  protocol,  such  as  WM_DELETE_WINDOW  or
              WM_SAVE_YOURSELF  or  WM_TAKE_FOCUS.   If both name and command are specified, then command is
              associated with the protocol specified by name.  Name will be added to  window's  WM_PROTOCOLS
              property  to tell the window manager that the application has a protocol handler for name, and
              command will be invoked in the future whenever the window  manager  sends  a  message  to  the
              client for that protocol.  In this case the command returns an empty string.  If name is spec-ified specified
              ified but command is not, then the current command for name is returned, or an empty string if
              there  is  no  handler  defined for name.  If command is specified as an empty string then the
              current handler for name is deleted and it is removed from the WM_PROTOCOLS property  on  win-dow; window;
              dow;  an empty string is returned.  Lastly, if neither name nor command is specified, the com-mand command
              mand returns a list of all the protocols for which handlers are currently defined for  window.

              Tk  always defines a protocol handler for WM_DELETE_WINDOW, even if you have not asked for one
              with wm protocol.  If a WM_DELETE_WINDOW message arrives when you have not defined a  handler,
              then Tk handles the message by destroying the window for which it was received.

       wm resizable window ?width height?
              This command controls whether or not the user may interactively resize a top-level window.  If
              width and height are specified, they are boolean values that determine whether the  width  and
              height  of  window  may  be  modified  by the user.  In this case the command returns an empty
              string.  If width and height are omitted then the command returns a list with two 0/1 elements
              that  indicate  whether  the  width and height of window are currently resizable.  By default,
              windows are resizable in both dimensions.  If resizing is disabled,  then  the  window's  size
              will be the size from the most recent interactive resize or wm geometry command.  If there has
              been no such operation then the window's natural size will be used.

       wm sizefrom window ?who?
              If who is specified, it must be either program or user, or an abbreviation  of  one  of  these
              two.   It indicates whether window's current size was requested by the program or by the user.
              Some window managers ignore program-requested sizes and ask the user to manually size the win-dow; window;
              dow;   if  user is specified then the window manager should give the window its specified size
              without asking the user for assistance.  If who is specified as an empty string, then the cur-rent current
              rent size source is cancelled.  If who is specified, then the command returns an empty string.
              Otherwise it returns user or window to indicate the source of the window's current size, or an
              empty  string if no source has been specified yet.  Most window managers interpret "no source"
              as equivalent to program.

       wm stackorder window ?isabove|isbelow window?
              The stackorder command returns a list of toplevel windows in stacking order,  from  lowest  to
              highest.  When  a single toplevel window is passed, the returned list recursively includes all
              of the window's children that are toplevels. Only those toplevels that are currently mapped to
              the screen are returned.  The stackorder command can also be used to determine if one toplevel
              is positioned above or below a second toplevel.  When two window arguments separated by either
              isabove  or  isbelow are passed, a boolean result indicates whether or not the first window is
              currently above or below the second window in the stacking order.

       wm state window ?newstate?
              If newstate is specified, the window will be set to the new state, otherwise  it  returns  the
              current  state  of  window:  either  normal, iconic, withdrawn, icon, or (Windows and Mac OS X
              only) zoomed.  The difference between iconic and icon is that iconic refers to a  window  that
              has  been  iconified  (e.g.,  with the wm iconify command) while icon refers to a window whose
              only purpose is to serve as the icon for some other window (via the  wm  iconwindow  command).
              The icon state cannot be set.

       wm title window ?string?
              If  string is specified, then it will be passed to the window manager for use as the title for
              window (the window manager should display this string in window's title bar).   In  this  case
              the  command returns an empty string.  If string is not specified then the command returns the
              current title for the window.  The title for a window defaults to its name.

       wm transient window ?master?
              If master is specified, then the window manager is informed that window is a transient  window
              (e.g.  pull-down  menu)  working on behalf of master (where master is the path name for a top-level toplevel
              level window).  If master is specified as an empty string then window is marked as not being a
              transient  window  any  more.  Otherwise the command returns the path name of window's current
              master, or an empty string if window is not currently a transient window.  A transient  window
              will  mirror  state  changes  in the master and inherit the state of the master when initially
              mapped. It is an error to attempt to make a window a transient of itself.

       wm withdraw window
              Arranges for window to be withdrawn from the screen.  This causes the window  to  be  unmapped
              and  forgotten  about  by  the window manager.  If the window has never been mapped, then this
              command causes the window to be mapped in the withdrawn state.  Not all window managers appear
              to  know  how  to  handle  windows that are mapped in the withdrawn state.  Note: it sometimes
              seems to be necessary to withdraw a window and then re-map it (e.g. with wm deiconify) to  get
              some window managers to pay attention to changes in window attributes such as group.

GEOMETRY MANAGEMENT
       By  default a top-level window appears on the screen in its natural size, which is the one determined
       internally by its widgets and geometry managers.  If the natural size of a top-level window  changes,
       then the window's size changes to match.  A top-level window can be given a size other than its natu-ral natural
       ral size in two ways.  First, the user can resize the window manually using  the  facilities  of  the
       window  manager, such as resize handles.  Second, the application can request a particular size for a
       top-level window using the wm geometry command.  These two cases are handled identically by  Tk;   in
       either case, the requested size overrides the natural size.  You can return the window to its natural
       by invoking wm geometry with an empty geometry string.

       Normally a top-level window can have any size from one pixel in each dimension up to the size of  its
       screen.   However, you can use the wm minsize and wm maxsize commands to limit the range of allowable
       sizes.  The range set by wm minsize and wm maxsize applies to all forms of  resizing,  including  the
       window's  natural  size  as well as manual resizes and the wm geometry command.  You can also use the
       command wm resizable to completely disable interactive resizing in one or both dimensions.

       The wm manage and wm forget commands may be used to perform undocking and docking of windows.   After
       a widget is managed by wm manage command, all other wm subcommands may be used with the widget.  Only
       widgets created using the toplevel command may have an attached menu via the -menu configure  option.
       A  toplevel  widget  may be used as a frame and managed with any of the other geometry managers after
       using the wm forget command.  Any menu associated with a toplevel widget will be hidden when  managed
       by  another geometry managers.  The menus will reappear once the window is managed by wm.  All custom
       bindtags for widgets in a subtree that have their top-level widget changed via a wm manage or wm for-get forget
       get  command,  must be redone to adjust any top-level widget path in the bindtags. Bindtags that have
       not been customized do not have to be redone.

GRIDDED GEOMETRY MANAGEMENT
       Gridded geometry management occurs when one of the widgets of an application supports a range of use-ful useful
       ful  sizes.  This occurs, for example, in a text editor where the scrollbars, menus, and other adorn-ments adornments
       ments are fixed in size but the edit widget can support any number of lines of text or characters per
       line.   In  this case, it is usually desirable to let the user specify the number of lines or charac-ters-per-line, characters-per-line,
       ters-per-line, either with the wm geometry command or by interactively resizing the window.   In  the
       case of text, and in other interesting cases also, only discrete sizes of the window make sense, such
       as integral numbers of lines and characters-per-line;  arbitrary pixel sizes are not useful.

       Gridded geometry management provides support for this kind of application.  Tk (and the  window  man-ager) manager)
       ager) assume that there is a grid of some sort within the application and that the application should
       be resized in terms of grid units rather than  pixels.   Gridded  geometry  management  is  typically
       invoked  by turning on the setGrid option for a widget;  it can also be invoked with the wm grid com-mand command
       mand or by calling Tk_SetGrid.  In each of these approaches the particular widget (or sometimes  code
       in  the application as a whole) specifies the relationship between integral grid sizes for the window
       and pixel sizes.  To return to non-gridded geometry management, invoke wm grid  with  empty  argument
       strings.

       When  gridded geometry management is enabled then all the dimensions specified in wm minsize, wm max-size, maxsize,
       size, and wm geometry commands are treated as grid units rather than pixel units.  Interactive resiz-ing resizing
       ing is also carried out in even numbers of grid units rather than pixels.

BUGS
       Most  existing  window managers appear to have bugs that affect the operation of the wm command.  For
       example, some changes will not take effect if the window is already active:  the window will have  to
       be withdrawn and de-iconified in order to make the change happen.

EXAMPLES
       A fixed-size window that says that it is fixed-size too:
              toplevel .fixed
              wm title     .fixed "Fixed-size Window"
              wm resizable .fixed 0 0

       A simple dialog-like window, centred on the screen:
              # Create and arrange the dialog contents.
              toplevel .msg
              label  .msg.l  -text "This is a very simple dialog demo."
              button .msg.ok -text OK -default active -command {destroy .msg}
              pack .msg.ok -side bottom -fill x
              pack .msg.l  -expand 1    -fill both

              # Now set the widget up as a centred dialog.

              # But first, we need the geometry managers to finish setting
              # up the interior of the dialog, for which we need to run the
              # event loop with the widget hidden completely...
              wm withdraw .msg
              update
              set x [expr {([winfo screenwidth .]-[winfo width .msg])/2}]
              set y [expr {([winfo screenheight .]-[winfo height .msg])/2}]
              wm geometry  .msg +$x+$y
              wm transient .msg .
              wm title     .msg "Dialog demo"
              wm deiconify .msg

SEE ALSO
       toplevel(n), winfo(n)

KEYWORDS
       aspect  ratio,  deiconify,  focus  model, geometry, grid, group, icon, iconify, increments, position,
       size, title, top-level window, units, window manager



Tk                                                   8.5                                               wm(n)

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