tk_getOpenFile man page on AIX

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tk_getOpenFile(n)	     Tk Built-In Commands	     tk_getOpenFile(n)

______________________________________________________________________________

NAME
       tk_getOpenFile,	tk_getSaveFile	-  pop up a dialog box for the user to
       select a file to open or save.

SYNOPSIS
       tk_getOpenFile ?option value ...?
       tk_getSaveFile ?option value ...?
_________________________________________________________________

DESCRIPTION
       The procedures tk_getOpenFile and tk_getSaveFile pop up	a  dialog  box
       for  the user to select a file to open or save. The tk_getOpenFile com‐
       mand is usually associated with the Open command in the File menu.  Its
       purpose	is  for	 the user to select an existing file only. If the user
       enters a non-existent file, the dialog box  gives  the  user  an	 error
       prompt  and  requires  the user to give an alternative selection. If an
       application allows the user to create new files, it  should  do	so  by
       providing a separate New menu command.

       The  tk_getSaveFile command is usually associated with the Save as com‐
       mand in the File menu. If the user enters a file that  already  exists,
       the  dialog  box prompts the user for confirmation whether the existing
       file should be overwritten or not.

       The following option-value pairs are possible as command line arguments
       to these two commands:

       -defaultextension extension
	      Specifies	 a string that will be appended to the filename if the
	      user enters a filename without an extension. The	default	 value
	      is  the  empty string, which means no extension will be appended
	      to the filename in any case. This option is ignored on Mac OS X,
	      which  does  not	require	 extensions to filenames, and the UNIX
	      implementation guesses  reasonable  values  for  this  from  the
	      -filetypes option when this is not supplied.

       -filetypes filePatternList
	      If a File types listbox exists in the file dialog on the partic‐
	      ular platform, this option gives the filetypes in this  listbox.
	      When  the	 user choose a filetype in the listbox, only the files
	      of that type are listed. If this option is unspecified, or if it
	      is  set  to  the empty list, or if the File types listbox is not
	      supported by the particular platform then all files  are	listed
	      regardless  of their types. See the section SPECIFYING FILE PAT‐
	      TERNS below for a discussion on the contents of filePatternList.

       -initialdir directory
	      Specifies that the files in directory should be  displayed  when
	      the dialog pops up. If this parameter is not specified, then the
	      files in the current working directory  are  displayed.  If  the
	      parameter	 specifies a relative path, the return value will con‐
	      vert the relative path to an absolute path.

       -initialfile filename
	      Specifies a filename to be displayed in the dialog when it  pops
	      up.

       -message string
	      Specifies a message to include in the client area of the dialog.
	      This is only available on Mac OS X.

       -multiple boolean
	      Allows the user to choose multiple files from the Open dialog.

       -parent window
	      Makes window the logical parent of the  file  dialog.  The  file
	      dialog  is  displayed  on top of its parent window. On Mac OS X,
	      this turns the file dialog into a sheet attached to  the	parent
	      window.

       -title titleString
	      Specifies a string to display as the title of the dialog box. If
	      this option is not specified, then a default title is displayed.

       -typevariable variableName
	      The global variable variableName is used to preselect which fil‐
	      ter is used from filterList when the dialog box is opened and is
	      updated when the dialog box is closed, to the last selected fil‐
	      ter.  The	 variable  is read once at the beginning to select the
	      appropriate filter. If the variable does not exist, or its value
	      does not match any filter typename, or is empty ({}), the dialog
	      box will revert to the default behavior of selecting  the	 first
	      filter  in  the list. If the dialog is canceled, the variable is
	      not modified.

       If the user selects a  file,  both  tk_getOpenFile  and	tk_getSaveFile
       return  the  full pathname of this file. If the user cancels the opera‐
       tion, both commands return the empty string.

SPECIFYING FILE PATTERNS
       The filePatternList value given by the -filetypes option is a  list  of
       file patterns. Each file pattern is a list of the form
	      typeName {extension ?extension ...?} ?{macType ?macType ...?}?
       typeName	 is  the  name of the file type described by this file pattern
       and is the text string that appears in the File types  listbox.	exten‐
       sion  is	 a  file  extension for this file pattern.  macType is a four-
       character Macintosh file type. The list of macTypes is optional and may
       be  omitted  for applications that do not need to execute on the Macin‐
       tosh platform.

       Several file patterns may have the same typeName, in  which  case  they
       refer  to  the  same file type and share the same entry in the listbox.
       When the user selects an entry in the listbox, all the files that match
       at  least  one  of  the	file  patterns corresponding to that entry are
       listed. Usually, each file pattern corresponds to a  distinct  type  of
       file.  The  use	of  more than one file pattern for one type of file is
       only necessary on the Macintosh platform.

       On the Macintosh platform, a file matches a file pattern	 if  its  name
       matches at least one of the extension(s) AND it belongs to at least one
       of the macType(s) of the file pattern. For example, the C Source	 Files
       file  pattern  in  the  sample  code  matches with files that have a .c
       extension AND belong to the macType TEXT. To use the OR	rule  instead,
       you  can	 use  two  file patterns, one with the extensions only and the
       other with the macType only. The GIF Files file type in the sample code
       matches	files  that either have a .gif extension OR belong to the mac‐
       Type GIFF.

       On the Unix and Windows platforms, a file matches a file pattern if its
       name  matches at least one of the extension(s) of the file pattern. The
       macTypes are ignored.

SPECIFYING EXTENSIONS
       On the Unix and Macintosh platforms, extensions are matched using glob-
       style pattern matching. On the Windows platform, extensions are matched
       by the underlying operating system. The types  of  possible  extensions
       are:

       (1)    the special extension “*” matches any file;

       (2)    the  special  extension  matches	any  files that do not have an
	      extension (i.e., the filename contains no full stop character);

       (3)    any character  string  that  does	 not  contain  any  wild  card
	      characters (* and ?).

       Due  to	the different pattern matching rules on the various platforms,
       to ensure portability, wild card characters  are	 not  allowed  in  the
       extensions, except as in the special extension “*”.  Extensions without
       a full stop character (e.g.  “~”) are allowed but may not work  on  all
       platforms.

EXAMPLE
	      set types {
		  {{Text Files}	      {.txt}	    }
		  {{TCL Scripts}      {.tcl}	    }
		  {{C Source Files}   {.c}	TEXT}
		  {{GIF Files}	      {.gif}	    }
		  {{GIF Files}	      {}	GIFF}
		  {{All Files}	      *		    }
	      }
	      set filename [tk_getOpenFile -filetypes $types]

	      if {$filename != ""} {
		  # Open the file ...
	      }

SEE ALSO
       tk_chooseDirectory

KEYWORDS
       file selection dialog

Tk				      4.2		     tk_getOpenFile(n)
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