/usr/share/gnudatalanguage/coyote/cgpickfile.pro is in gdl-coyote 2016.11.13-2.
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;
; NAME:
; cgPickfile
;
; PURPOSE:
; This is a utility program for selecting data files. It is a wrapper for DIALOG_PICKFILE,
; with the additional functionality of being able to "remember" the name and directory of
; the last file selected by the program. It basically allows you to start the next file
; selection from the location of the previous file selection.
;******************************************************************************************;
; ;
; Copyright (c) 2011, by Fanning Software Consulting, Inc. All rights reserved. ;
; ;
; Redistribution and use in source and binary forms, with or without ;
; modification, are permitted provided that the following conditions are met: ;
; ;
; * Redistributions of source code must retain the above copyright ;
; notice, this list of conditions and the following disclaimer. ;
; * Redistributions in binary form must reproduce the above copyright ;
; notice, this list of conditions and the following disclaimer in the ;
; documentation and/or other materials provided with the distribution. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''AS IS'' AND ANY ;
; EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES ;
; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT ;
; SHALL FANNING SOFTWARE CONSULTING, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, ;
; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED ;
; TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; ;
; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ;
; ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT ;
; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS ;
; SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. ;
;******************************************************************************************;
;
;+
; This is a utility program for selecting data files. It is a wrapper for DIALOG_PICKFILE,
; with the additional functionality of being able to "remember" the name and directory of
; the last file selected by the program. It basically allows you to start the next file
; selection from the location of the previous file selection.
;
; :Categories:
; Utility
;
; :Returns:
; The fully-qualified name of the selected file or a null string if the CANCEL
; button was selected.
;
; :Keywords:
; datadir: in, optional, type=string
; Set this keyword to the name of the data directory. If not set, the program
; assumes the data directory is rooted in the directory that holds this program
; file, or the directory directly above it. If it can't find a "data" directory
; in either of these two locations, the current directory is used as the "data"
; directory. The data directory is ONLY used if there is no "current" last
; directory. In other words, it is only used if cgPickfile has not been called
; in the current IDL session.
; demo: in, optional, type=boolean, default=0
; If set, starts in the !DIR/examples/data directory.
; jpeg: in, optional, type=boolean, default=0
; If set, starts in the "jpeg" directory. It assumes the jpeg directory is rooted
; in the "data" directory.
; hdf: in, optional, type=boolean, default=0
; If set, starts in the "hdf" directory. It assumes the hdf directory is rooted
; in the "data" directory.
; last_file: in, optional, type=boolean, default=0
; If set, the name of the last file opened is placed in the filename widget.
; lidar: in, optional, type=boolean, default=0
; If set, starts in the "lidar" directory. It assumes the lidar directory is
; rooted in the "data" directory.
; ncdf: in, optional, type=boolean, default=0
; If set, starts in the "ncdf" directory. It assumes the ncdf directory is
; rooted in the "data" directory.
; png: in, optional, type=boolean, default=0
; If set, starts in the "png" directory. It assumes the png directory is
; rooted in the "data" directory.
; tiff: in, optional, type=boolean, default=0
; If set, starts in the "tiff" directory. It assumes the tiff directory is
; rooted in the "data" directory.
; title: in, optional, type=string, default="Please Select a File"
; The title for the selection dialog window. If the `Write` keyword is set,
; the default title becomes "Please Select a File for Writing".
; write: in, optional, type=boolean, default=0
; Set this keyword to change the default title to "Please Select a File for Writing".
; _ref_extra: in, optional
; Accepts any input keywords to DIALOG_PICKFILE (e.g., FILTER).
;
; :Author:
; FANNING SOFTWARE CONSULTING::
; David W. Fanning
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com
;
; :History:
; Change History::
; Adapted from FSC_PICKFILE to be a Coyote Graphics routine by David W. Fanning, 4 Aug 2011.
; Added keywords TITLE and WRITE to work around a bug in Dialog_Pickfile that clips the
; input filenames. 25 Feb 2012. DWF.
; Swithched from ProgramRootDir to cgSourceDir. 27 Jan 2014. DWF.
;
; :Copyright:
; Copyright (c) 2011-2014, Fanning Software Consulting, Inc.
;-
FUNCTION cgPickfile, $
DATADIR=datadir, $
DEMO=demo, $
JPEG=jpeg, $
HDF=hdf, $
LAST_FILE=last_file, $
LIDAR=lidar, $
NCDF=ncdf, $
PNG=png, $
TIFF=tiff, $
TITLE=title, $
WRITE=write, $
_REF_EXTRA=extra
On_Error, 2 ; Return to caller.
Compile_Opt idl2
; Check keywords to see if anything is set.
demo = Keyword_Set(demo)
jpeg = Keyword_Set(jpeg)
hdf = Keyword_Set(hdf)
lidar = Keyword_Set(lidar)
ncdf = Keyword_Set(ncdf)
png = Keyword_Set(png)
tiff = Keyword_Set(tiff)
keywordsAreSet = Total(demo+jpeg+hdf+lidar+ncdf+png+tiff) GT 0
; There is a bug in Windows that causes Dialog_Pickfile to clip the
; input filename unless the WRITE keyword is set. So, in this program
; the WRITE keyword is *always* set. But this means we have to pay attention
; to the TITLE, too. This is where we do all of that.
IF N_Elements(title) EQ 0 THEN BEGIN
IF Keyword_Set(write) $
THEN title = "Please Select a File for Writing" $
ELSE title = "Please Select a File"
ENDIF
; Find the "data" subdirectory. If it can't be found, then the
; current directory is the data directory.
IF N_Elements(dataDir) EQ 0 THEN BEGIN
dataDir = cgSourceDir() + 'data'
IF ~File_Test(dataDir, /DIRECTORY) THEN BEGIN
dataDir = cgSourceDir(/ONEUP) + 'data'
IF ~File_Test(dataDir, /DIRECTORY) THEN CD, CURRENT=dataDir
ENDIF
ENDIF
; Be sure the dataDir exists.
IF ~File_Test(dataDir, /DIRECTORY) THEN BEGIN
Message, 'Specified data directory cannot be found. Using current directory.', /Informational
CD, CURRENT=dataDir
ENDIF
; If a keyword is set, define the image directory.
IF keywordsAreSet THEN BEGIN
CASE 1 OF
jpeg: imageDir = 'jpeg'
hdf: imageDir = 'hdf'
lidar: imageDir = 'lidar'
ncdf: imageDir = 'netCDF'
png: imageDir = 'png'
tiff: imageDir = 'tiff'
ELSE:
ENDCASE
; If imageDir is defined, use it. Otherwise, use the dataDir.
IF N_Elements(imageDir) NE 0 THEN BEGIN
checkDir = dataDir + Path_Sep() + imageDir
ENDIF ELSE BEGIN
checkDir = dataDir
ENDELSE
; Did the user chose a demo directory?
IF Keyword_Set(demo) THEN BEGIN
checkDir= File_DirName(Filepath(SUBDIRECTORY=['examples','data'], '*'))
ENDIF
IF ~File_Test(checkDir, /DIRECTORY) THEN fileDir = dataDir ELSE fileDir = checkDir
ENDIF ELSE BEGIN
; If the lastDir was saved, use it. Otherwise, the dataDir.
DEFSYSV, '!cgPickfile_LastDir', EXISTS=exists
IF ~exists THEN fileDir = dataDir ELSE fileDir = !cgPickfile_LastDir
ENDELSE
; Should we use the last file?
IF Keyword_Set(last_file) THEN BEGIN
; If the last file was saved, use it. Otherwise, the nothing to use.
DEFSYSV, '!cgPickfile_LastFile', EXISTS=exists
IF exists THEN lastFile = !cgPickfile_LastFile
ENDIF
; Has the fileDir been defined. If not, use the dataDir.
IF N_Elements(fileDir) EQ 0 THEN fileDir = dataDir
file = Dialog_Pickfile(PATH=fileDir, GET_PATH=selectedDir, $
FILE=lastFile, _STRICT_EXTRA=extra, /WRITE, TITLE=title)
; Save the last directory and filename. Make sure you are working
; with a scalar.
IF file[0] NE "" THEN BEGIN
DEFSYSV, '!cgPickfile_LastDir', EXISTS=exists
IF (exists AND (N_Elements(selectedDir) NE 0)) THEN BEGIN
!cgPickfile_LastDir = selectedDir
ENDIF ELSE BEGIN
IF N_Elements(selectedDir) NE 0 THEN DEFSYSV, '!cgPickfile_LastDir', selectedDir
ENDELSE
DEFSYSV, '!cgPickfile_LastFile', EXISTS=exists
IF exists THEN BEGIN
!cgPickfile_LastFile = File_BaseName(file[0])
ENDIF ELSE BEGIN
DEFSYSV, '!cgPickfile_LastFile', File_BaseName(file[0])
ENDELSE
ENDIF
RETURN, file
END
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