/usr/share/gnudatalanguage/coyote/cgsymbol.pro is in gdl-coyote 2016.11.13-2.
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;
; NAME:
; cgSymbol
;
; PURPOSE:
; This function provides a device-independent way to ask for commonly-used
; symbols (e.g., less than or equal to, Angstrom, degree symbol, etc.),
; including all 24 Greek symbols in upper and lower case, to display with text.
;
;******************************************************************************************;
; ;
; 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 function provides a device-independent way to ask for commonly-used
; symbols (e.g., less than or equal to, Angstrom, degree symbol, subscripts, superscripts, etc.),
; including all 24 Greek symbols in upper and lower case, to display with text.
;
; For this program to work correctly on your graphics display, you should be using
; Hershey fonts (!P.Font=-1). It will work correctly in PostScript with either
; hardware fonts (!P.Font=0) or True-Type fonts (!P.Font=1).
;
; `Greek Symbols <http://www.idlcoyote.com/ps_tips/greeksym.html>` are created by
; calling the Coyote Library routine `cgGreek <http://www.idlcoyote.com/programs/cggreek.pro>'
; from this program.
;
; .. image:: cgsymbol.png
;
; Normally, rather than calling cgSymbol, the symbols are embedded in Coyote Graphics
; text that are used for axis annotation and so forth. See `Embedding Symbols in Coyote
; Graphics Output <http://www.idlcoyote.com/cg_tips/embedsymbols.php>`. Embedded subscripts
; and superscripts are implemented like this::
; $\upTEXT$ : Raise the text in TEXT to superscript level and reduce character size by 62%.
; $\expTEXT$ : Raise the text in TEXT to superscript level and reduce character size by 44%.
; $\downTEXT$ : Lower the text in TEXT to subscript level and reduce character size by 62%.
; $\subTEXT$ : Lower the text in TEXT to subscript level and reduce character size by 44%.
;
; :Categories:
; Graphics
;
; :Returns:
; A string variable that represents the requested symbol and can be used
; in a textual context.
;
; :Examples:
; To create a lowercase Greek psi symbol::
;
; IDL> cgPlot, findgen(11), XTitle='This title contains ' + $
; cgSymbol('psi') + ' as a Greek letter'
; IDL> cgPlot, findgen(11), XTitle='This title contains $\psi$ as a Greek letter'
;
; To create an Angstrom sign::
;
; IDL> cgPlot, findgen(11), XTitle='This title contains (' + $
; cgSymbol('Angstrom') + ') an Angstrom sign.'
; IDL> cgPlot, findgen(11), XTitle='This title contains ($\Angstrom$) an Angstrom sign.'
;
; To create subscripts or superscripts::
;
; IDL> cgPlot, findgen(11), XTitle='E=mc$\up2$'
; IDL> cgPlot, findgen(11), XTitle='H$\sub2$O'
; IDL> cgPlot, findgen(11), XTitle='H$\upSuper$MT $\Omega$$\subSubscript$', Charsize=2.0
;
; It is possible to use Greek characters as superscripts and subscripts. Do so by
; prepending the Greek character with "\\" inside the normal superscript or subscript
; notation. For example, to use lambda as an exponent to the Greek character Omega, you
; can type this::
;
; IDL> cgPlot, cgDemoData(1), XTitle='$\Omega$$\exp\\lambda$', Charsize=2.0
;
; To use lambda as a subscript, type this::
;
; IDL> cgPlot, cgDemoData(1), XTitle='$\Omega$$\sub\\lambda$', Charsize=2.0
;
; You would do the same thing if you wanted, say, the Sun symbol to be a subscript::
;
; IDL> cgSet_TTFont, 'dejavusans'
; IDL> cgPlot, cgDemoData(1), XTitle='R$\sub\\sun$', Charsize=2.0, Output='test.png'
;
; :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::
; Written by: David W. Fanning, 2 September 2011.
; Added plus-minus symbol. 2 Nov 2011. DWF.
; Added "up", "down", "exp" "sub" and "n" symbols for subscripting and superscripting. 9 Nov 2012. DWF.
; Added "division" and "times" signs. 24 Nov 2012. DWF.
; Updated UNICODE values to display capital letters correctly. 23 Dec 2012. DWF.
; Change to allow for astronomically correct Sun symbol in DejaVuSans font when in the PostScript
; device, using True-Type fonts. 5 Dec 2014. DWF.
;
; :Copyright:
; Copyright (c) 2011, Fanning Software Consulting, Inc.
;-
;+
; Displays the symbols and their names in a graphics window.
;
; :Keywords:
; ps: in, optional, type=boolean, default=0
; Normally, the PostScript version of the symbol is returned automatically if
; the current device is PostScript and !P.Font is 0 or 1. But, the PostScript version
; of the symbol can be obtained at any time and in any device, by setting this keyword.
; unicode: in, optional, type=boolean, default=0
; If this keyword is set, the function returns the Unicode value for the symbol.
;
;-
PRO cgSymbol_Example, PS=ps, UNICODE=unicode
Forward_Function cgSymbol
Compile_Opt hidden
; The symbols..
symbol = [ 'alpha', 'beta', 'gamma', 'delta', 'epsilon', 'zeta', $
'eta', 'theta', 'iota', 'kappa', 'lambda', 'mu', $
'nu', 'xi', 'omicron', 'pi', 'rho', 'sigma', 'tau', $
'upsilon', 'phi', 'chi', 'psi', 'omega', 'leq', 'geq', $
'neq', 'deg', '+-', 'equiv', 'prime', 'angstrom', 'sun', $
'varphi', 'infinity', 'copyright' ]
; Output positions.
x = [0.15, 0.4, 0.65]
y = Reverse((Indgen(13) + 1) * (1.0 / 14))
; Need PostScript output?
IF Keyword_Set(ps) || (!D.Name EQ 'PS') THEN cgPS_Open
; Create a window.
cgDisplay, 800, 500
; Output the symbols.
FOR j=0,11 DO BEGIN
cgText, x[0], y[j], symbol[j] + ': ' + $
cgSymbol(symbol[j], UNICODE=unicode) + cgSymbol(symbol[j], /CAPITAL, UNICODE=unicode), $
/NORMAL, CHARSIZE=1.5
cgText, x[1], y[j], symbol[j+12] + ': ' + $
cgSymbol(symbol[j+12], UNICODE=unicode) + cgSymbol(symbol[j+12], /CAPITAL, UNICODE=unicode), $
/NORMAL, CHARSIZE=1.5
IF j NE 12 THEN cgText, x[2], y[j], symbol[j+24] + ': ' + $
cgSymbol(symbol[j+24], UNICODE=unicode), $
/NORMAL, CHARSIZE=1.5
ENDFOR
; Clean up PostScript, if needed.
IF Keyword_Set(ps) || (!D.Name EQ 'PS') THEN cgPS_Close
; Restore the users window.
IF N_Elements(thisWindow) NE 0 THEN BEGIN
IF thisWindow GE 0 THEN WSet, thisWindow
ENDIF
END ; --------------------------------------------------------------------------------------
;+
; This function provides a device-independent way to ask for commonly-used
; symbols (e.g., less than or equal to, Angstrom, degree symbol, etc.),
; including all 24 Greek symbols in upper and lower case, to display with text.
;
; :Params:
; symbol: in, required, type=string, default="alpha"
; The name of the symbol desired as a string. Valid string names are the 24
; characters of the Greek alphabet, plus commonly used graphical symbols::
;
; alpha nu leq
; beta xi geq
; gamma omicron neg
; delta pi deg
; epsilon rho equiv
; zeta sigma prime
; eta tau angstrom
; theta upsilon sun
; iota phi varphi
; kappa chi infinity
; lambda psi copyright
; mu omega
;
; Note that if the first letter of the name is capitalized, this is
; the equivalent of setting the `Capital` keyword. Only Greek characters
; use this method of selecting symbols.
;
; :Keywords:
; capital: in, optional, type=boolean, default=0
; If this keyword is set, the captial Greek letter is returned rather than the lowercase
; Greek letter. An alternative way of capitalizing the letter is to make the first letter
; of the name an uppercase letter.
; example: in, optional, type=boolean, default=0
; If this keyword is set, the names of symbols and the symbols themselves are written
; out in the current graphics window.
; ps: in, optional, type=boolean, default=0
; Normally, the PostScript version of the symbol is returned automatically if
; the current device is PostScript and !P.Font is 0 or 1. But, the PostScript version
; of the symbol can be obtained at any time and in any device, by setting this keyword.
; unicode: in, optional, type=boolean, default=0
; If this keyword is set, the function returns the Unicode value for the symbol.
;
;-
FUNCTION cgSymbol, symbol, CAPITAL=capital, EXAMPLE=example, PS=PS, UNICODE=unicode
Compile_Opt idl2
; Return to caller on error.
ON_Error, 2
; A common block to communicate with cgPS_Open.
COMMON _$FSC_PS_START_, ps_struct
; Do you wish to see an example?
IF Keyword_Set(example) THEN BEGIN
cgSymbol_Example, UNICODE=unicode, PS=ps
RETURN, ""
ENDIF
; A symbol name is required.
IF N_Elements(symbol) EQ 0 THEN BEGIN
Print, 'Syntax: cgSymbol("theSymbol")
RETURN, ""
ENDIF
; Return quietly if the symbol is a null string.
IF symbol EQ "" THEN RETURN, ""
; Set up PostScript device for working with Greek letters.
IF !D.Name EQ 'PS' THEN Device, ISOLATIN1=1
; Check keywords.
capital = Keyword_Set(capital)
; If the first letter of the "symbol" variable is uppercase
; the user wants an uppercase symbol, if available.
firstLetter = StrMid(symbol, 0, 1)
IF firstLetter EQ StrUpCase(firstLetter) THEN capital = 1
IF Keyword_Set(unicode) THEN BEGIN
CASE StrLowCase(symbol) OF
'alpha': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'beta': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'gamma': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'delta': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'epsilon': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'zeta': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'eta': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'theta': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'iota': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'kappa': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'lambda': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'mu': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'nu': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'xi': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'omicron': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'pi': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'rho': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'sigma': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'tau': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'upsilon': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'phi': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'chi': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'psi': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'omega': retSymbol = cgGreek(symbol, /UNICODE, CAPITAL=capital)
'leq': retSymbol = '!Z(2266)'
'geq': retSymbol = '!Z(2267)'
'neq': retSymbol = '!Z(2260)'
'deg': retSymbol = '!Z(00B0)'
'+-': retSymbol = '!Z(00B1)'
'equiv': retSymbol = '!Z(2261)'
'prime': retSymbol = '!Z(2232)'
'angstrom':retSymbol = '!Z(00C5)'
'sun': retSymbol = '!Z(2609)'
'varphi': retSymbol = '!Z(03D5)'
'infinity':retSymbol = '!Z(221E)'
'copyright': retSymbol = '!Z(00A9)'
'up': retSymbol = '!U'
'down': retSymbol = '!D'
'exp': retSymbol = '!E'
'sub': retSymbol = '!I'
'n': retSymbol = '!N'
'div': retSymbol = '!Z(00F7)'
'times': retSymbol = '!Z(00D7)'
ELSE: Message, 'The symbol ' + symbol + ' is unrecognized.'
ENDCASE
; Return the UNICODE letter.
RETURN, retSymbol
ENDIF
IF ((!D.Name EQ 'PS') && (!P.FONT NE -1)) || Keyword_Set(PS) THEN BEGIN
; Make sure ISOLATIN1 encoding is turned on.
IF (!D.Name EQ 'PS') THEN DEVICE, /ISOLATIN1
CASE StrLowCase(symbol) OF
'alpha': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'beta': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'gamma': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'delta': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'epsilon': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'zeta': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'eta': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'theta': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'iota': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'kappa': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'lambda': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'mu': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'nu': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'xi': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'omicron': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'pi': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'rho': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'sigma': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'tau': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'upsilon': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'phi': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'chi': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'psi': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'omega': retSymbol = cgGreek(symbol, CAPITAL=capital, /PS)
'leq': retSymbol = '!9' + String("243B) + '!X'
'geq': retSymbol = '!9' + String("263B) + '!X'
'neq': retSymbol = '!9' + String("271B) + '!X'
'deg': retSymbol = '!9' + String("260B) + '!X'
'+-': retSymbol = '!9' + String("261B) + '!X'
'equiv': retSymbol = '!9' + String("272B) + '!X'
'prime': retSymbol = '!9' + String("242B) + '!X'
'angstrom':retSymbol = '!3' + String("305B) + '!X'
'sun': BEGIN
IF (ps_struct.font EQ 1) && (StrUpCase(ps_struct.tt_font) EQ 'DEJAVUSANS') THEN BEGIN
retSymbol = '!Z(2609)'
ENDIF ELSE BEGIN
IF (!P.FONT EQ 1) && (Float(!Version.Release) GE 8.0) THEN BEGIN
retSymbol = '!10!Z(2609)!X'
ENDIF ELSE BEGIN
thisDevice = !D.Name
Set_Plot, 'PS'
Device, /AVANTGARDE, ISOLATIN1=0, /BOOK, FONT_INDEX = 20
retSymbol = '!20!S!DO!R!I ' + string(183b) + '!X!N'
Set_Plot, thisDevice
ENDELSE
ENDELSE
END
'varphi': retSymbol = '!9' + String("152B) + '!X'
'infinity':retSymbol = '!9' + String("245B) + '!X'
'copyright':retSymbol = '!9' + String("323B) + '!X'
'up': retSymbol = '!U'
'down': retSymbol = '!D'
'exp': retSymbol = '!E'
'sub': retSymbol = '!I'
'n': retSymbol = '!N'
'div': retSymbol = '!9' + String("270B) + '!X'
'times': retSymbol = '!9' + String("264B) + '!X'
ELSE: Message, 'The symbol ' + symbol + ' is unrecognized.'
ENDCASE
ENDIF ELSE BEGIN
CASE StrLowCase(symbol) OF
'alpha': retSymbol = cgGreek(symbol, CAPITAL=capital)
'beta': retSymbol = cgGreek(symbol, CAPITAL=capital)
'gamma': retSymbol = cgGreek(symbol, CAPITAL=capital)
'delta': retSymbol = cgGreek(symbol, CAPITAL=capital)
'epsilon': retSymbol = cgGreek(symbol, CAPITAL=capital)
'zeta': retSymbol = cgGreek(symbol, CAPITAL=capital)
'eta': retSymbol = cgGreek(symbol, CAPITAL=capital)
'theta': retSymbol = cgGreek(symbol, CAPITAL=capital)
'iota': retSymbol = cgGreek(symbol, CAPITAL=capital)
'kappa': retSymbol = cgGreek(symbol, CAPITAL=capital)
'lambda': retSymbol = cgGreek(symbol, CAPITAL=capital)
'mu': retSymbol = cgGreek(symbol, CAPITAL=capital)
'nu': retSymbol = cgGreek(symbol, CAPITAL=capital)
'xi': retSymbol = cgGreek(symbol, CAPITAL=capital)
'omicron': retSymbol = cgGreek(symbol, CAPITAL=capital)
'pi': retSymbol = cgGreek(symbol, CAPITAL=capital)
'rho': retSymbol = cgGreek(symbol, CAPITAL=capital)
'sigma': retSymbol = cgGreek(symbol, CAPITAL=capital)
'tau': retSymbol = cgGreek(symbol, CAPITAL=capital)
'upsilon': retSymbol = cgGreek(symbol, CAPITAL=capital)
'phi': retSymbol = cgGreek(symbol, CAPITAL=capital)
'chi': retSymbol = cgGreek(symbol, CAPITAL=capital)
'psi': retSymbol = cgGreek(symbol, CAPITAL=capital)
'omega': retSymbol = cgGreek(symbol, CAPITAL=capital)
'leq': retSymbol = '!9' + String("154B) + '!X'
'geq': retSymbol = '!9' + String("142B) + '!X'
'neq': retSymbol = '!9' + String("75B) + '!X'
'deg': retSymbol = '!9' + String("45B) + '!X'
'+-': retSymbol = '!9' + String("53B) + '!X'
'equiv': retSymbol = '!9' + String("72B) + '!X'
'prime': retSymbol = '!9' + String("140B) + '!X'
'angstrom':retSymbol = '!3' + String("305B) + '!X'
'sun': retSymbol = '!D!9n!N!X'
'varphi': retSymbol = '!9' + String("120B) + '!X'
'infinity':retSymbol = '!9' + String("44B) + '!X'
'copyright':retSymbol = '!3' + String("251B) + '!X'
'up': retSymbol = '!U'
'down': retSymbol = '!D'
'exp': retSymbol = '!E'
'sub': retSymbol = '!I'
'n': retSymbol = '!N'
'div': retSymbol = '!9' + String("57B) + '!X'
'times': retSymbol = '!9' + String("130B) + '!X'
ELSE: Message, 'The symbol ' + symbol + ' is unrecognized.'
ENDCASE
ENDELSE
RETURN, retSymbol
END
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