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diff --git a/doc/getOpenFile.n b/doc/getOpenFile.n new file mode 100644 index 0000000..f8a8b72 --- /dev/null +++ b/doc/getOpenFile.n @@ -0,0 +1,155 @@ +'\" +'\" Copyright (c) 1996 Sun Microsystems, Inc. +'\" +'\" See the file "license.terms" for information on usage and redistribution +'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. +'\" +'\" SCCS: @(#) getOpenFile.n 1.8 96/12/08 21:14:31 +'\" +.so man.macros +.TH tk_getOpenFile n 4.2 Tk "Tk Built-In Commands" +.BS +'\" Note: do not modify the .SH NAME line immediately below! +.SH NAME +tk_getOpenFile, tk_getSaveFile \- pop up a dialog box for the user to select a file to open or save. +.PP +.PP +.SH SYNOPSIS +\fBtk_getOpenFile \fR?\fIoption value ...\fR? +.br +\fBtk_getSaveFile \fR?\fIoption value ...\fR? +.BE + +.SH DESCRIPTION +.PP +The procedures \fBtk_getOpenFile\fR and \fBtk_getSaveFile\fR pop up a +dialog box for the user to select a file to open or save. The +\fBtk_getOpenFile\fR command is usually associated with the \fBOpen\fR +command in the \fBFile\fR menu. Its purpose is for the user to select an +existing file \fIonly\fR. If the user enters an 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 \fBNew\fR menu command. +.PP +The \fBtk_getSaveFile\fR command is usually associated with the \fBSave +as\fR command in the \fBFile\fR 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. +.PP +The following \fIoption\-value\fR pairs are possible as command line +arguments to these two commands: +.TP +\fB\-defaultextension\fR \fIextension\fR +Specifies a string that will be appended to the filename if the user +enters a filename without an extension. The defaut value is the empty +string, which means no extension will be appended to the filename in +any case. This option is ignored on the Macintosh platform, which +does not require extensions to filenames. +.TP +\fB\-filetypes\fR \fIfilePatternList\fR +If a \fBFile types\fR listbox exists in the file dialog on the particular +platform, this option gives the \fIfiletype\fRs 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 \fBFile types\fR listbox is not supported by the +particular platform then all files are listed regardless of their +types. See the section SPECIFYING FILE PATTERNS below for a +discussion on the contents of \fIfilePatternList\fR. +.TP +\fB\-initialdir\fR \fIdirectory\fR +Specifies that the files in \fIdirectory\fR should be displayed +when the dialog pops up. If this parameter is not specified, then +the files in the current working directory are displayed. This +option may not always work on the Macintosh. This is not a bug. +Rather, the \fIGeneral Controls\fR control panel on the Mac allows the +end user to override the application default directory. +.TP +\fB\-initialfile\fR \fIfilename\fR +Specifies a filename to be displayed in the dialog when it pops +up. This option is ignored by the \fBtk_getOpenFile\fR command. +.TP +\fB\-parent\fR \fIwindow\fR +Makes \fIwindow\fR the logical parent of the file dialog. The file +dialog is displayed on top of its parent window. +.TP +\fB\-title\fR \fItitleString\fR +Specifies a string to display as the title of the dialog box. If this +option is not specified, then a default title is displayed. This +option is ignored on the Macintosh platform. +.PP +If the user selects a file, both \fBtk_getOpenFile\fR and +\fBtk_getSaveFile\fR return the full pathname of this file. If the +user cancels the operation, both commands return the empty string. +.SH "SPECIFYING FILE PATTERNS" + +The \fIfilePatternList\fR value given by the \fB\-filetypes\fR option +is a list of file patterns. Each file pattern is a list of the +form +.CS +\fItypeName\fR {\fIextension\fR ?\fIextension ...\fR?} ?{\fImacType\fR ?\fImacType ...\fR?}? +.CE +\fItypeName\fR is the name of the file type described by this +file pattern and is the text string that appears in the \fBFile types\fR +listbox. \fIextension\fR is a file extension for this file pattern. +\fImacType\fR is a four-character Macintosh file type. The list of +\fImacType\fRs is optional and may be omitted for applications that do +not need to execute on the Macintosh platform. +.PP +Several file patterns may have the same \fItypeName,\fR 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 patterns for one +type of file is necessary on the Macintosh platform only. +.PP +On the Macintosh platform, a file matches a file pattern if its +name matches at least one of the \fIextension\fR(s) AND it +belongs to at least one of the \fImacType\fR(s) of the +file pattern. For example, the \fBC Source Files\fR file pattern in the +sample code matches with files that have a \fB\.c\fR extension AND +belong to the \fImacType\fR \fBTEXT\fR. To use the OR rule instead, +you can use two file patterns, one with the \fIextensions\fR only and +the other with the \fImacType\fR only. The \fBGIF Files\fR file type +in the sample code matches files that EITHER have a \fB\.gif\fR +extension OR belong to the \fImacType\fR \fBGIFF\fR. +.PP +On the Unix and Windows platforms, a file matches a file pattern +if its name matches at at least one of the \fIextension\fR(s) of +the file pattern. The \fImacType\fRs are ignored. +.SH "SPECIFYING EXTENSIONS" +.PP +On the Unix and Macintosh platforms, extensions are matched using +glob-style pattern matching. On the Windows platforms, 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 ?). +.PP +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. + +.SH EXAMPLE +.CS +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 ... +} +.CE + +.SH KEYWORDS +file selection dialog |