[2] | 1 | ;+ |
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| 2 | ; |
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[136] | 3 | ; @file_comments |
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[133] | 4 | ; The purpose of this routine is to add a color bar to the current |
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| 5 | ; graphics window. |
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[2] | 6 | ; |
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[231] | 7 | ; @categories |
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| 8 | ; Graphics, Widget |
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[2] | 9 | ; |
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[137] | 10 | ; @keyword BOTTOM {default=0B} |
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[136] | 11 | ; The lowest color index of the colors to be loaded in the bar. |
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[2] | 12 | ; |
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[136] | 13 | ; @keyword CB_CHARSIZE {default=1.0} |
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| 14 | ; The character size of the color bar annotations. |
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[2] | 15 | ; |
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[136] | 16 | ; @keyword CB_CHARTHICK {default=1.0} |
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| 17 | ; The character thick of the color bar annotations. |
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[2] | 18 | ; |
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[136] | 19 | ; @keyword CB_COLOR {default=ncolors - 1 + bottom} |
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| 20 | ; The color index of the bar outline and characters. |
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[2] | 21 | ; |
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[136] | 22 | ; @keyword CB_LOG |
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| 23 | ; to get logarithmic scale for the colorbar |
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[19] | 24 | ; |
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[137] | 25 | ; @keyword CB_TITLE {default=''} |
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| 26 | ; This is title for the color bar. |
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[2] | 27 | ; |
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[231] | 28 | ; @keyword DISCRETE |
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[136] | 29 | ; Vector which contain color's indexes to trace in a color bar. Therefore |
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[231] | 30 | ; we obtain a discrete colorbar which contains only the specified colors |
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[137] | 31 | ; in the order they appear in the vector |
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[2] | 32 | ; |
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[136] | 33 | ; @keyword DIVISIONS {default=2} |
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| 34 | ; The number of divisions to divide the bar into. |
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| 35 | ; There will be (divisions + 1) annotations. |
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[2] | 36 | ; |
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[136] | 37 | ; @keyword FORMAT {default='(F6.2)'} |
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| 38 | ; The format of the bar annotations. |
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[2] | 39 | ; |
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[163] | 40 | ; @keyword CB_LABEL {type=vector} |
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| 41 | ; A vector to specify sticks values of the color bar. It allows, |
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[137] | 42 | ; when we use DISCRETE, to have colors that don't increase by |
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| 43 | ; increments in a regular way. |
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[2] | 44 | ; |
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[136] | 45 | ; @keyword MAX {default=NCOLORS - 1} |
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| 46 | ; The maximum data value for the bar annotation. |
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[2] | 47 | ; |
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[136] | 48 | ; @keyword MIN {default=0} |
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| 49 | ; The minimum data value for the bar annotation. |
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[2] | 50 | ; |
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[137] | 51 | ; @keyword NCOLORS {default=!D.N_COLORS} |
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[136] | 52 | ; This is the number of colors in the color bar. |
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[2] | 53 | ; |
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[136] | 54 | ; @keyword NOTITLE |
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| 55 | ; Force to don't write title even if CB_TITLE is declared. |
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[2] | 56 | ; |
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[137] | 57 | ; @keyword POSITION {default=see bellow} |
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[136] | 58 | ; A four-element array of normalized coordinates in the same |
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| 59 | ; form as the POSITION keyword on a plot. Default is |
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| 60 | ; [0.88, 0.15, 0.95, 0.95] for a vertical bar and |
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| 61 | ; [0.15, 0.88, 0.95, 0.95] for a horizontal bar. |
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[2] | 62 | ; |
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[136] | 63 | ; @keyword PSCOLOR |
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| 64 | ; This keyword is only applied if the output is being sent to |
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| 65 | ; a Postscript file. It indicates that the Postscript device |
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| 66 | ; is configured for color output. If this keyword is set, then |
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| 67 | ; the annotation is drawn in the color specified by the COLOR |
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| 68 | ; keyword. If the keyword is not set, the annotation is drawn |
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| 69 | ; in the color specified by the !P.COLOR system variable |
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| 70 | ; (usually this will be the color black). In general, this |
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| 71 | ; gives better looking output on non-color or gray-scale |
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| 72 | ; printers. If you are not specifically setting the annotation |
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| 73 | ; color (with the COLOR keyword), it will probably |
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| 74 | ; be better NOT to set this keyword either, even if you |
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| 75 | ; are outputting to a color Postscript printer. |
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[2] | 76 | ; |
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[136] | 77 | ; @keyword RIGHT |
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| 78 | ; This puts the labels on the right-hand side of a vertical |
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| 79 | ; color bar. It applies only to vertical color bars. |
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[2] | 80 | ; |
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[136] | 81 | ; @keyword TOP |
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| 82 | ; This puts the labels on top of the bar rather than under it. |
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| 83 | ; The keyword only applies if a horizontal color bar is rendered. |
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[2] | 84 | ; |
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[137] | 85 | ; @keyword VERTICAL {default=0 -> horizontal color bar} |
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[136] | 86 | ; Setting this keyword give a vertical color bar. |
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[2] | 87 | ; |
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[155] | 88 | ; @keyword _EXTRA |
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| 89 | ; pass any keyword to colorbar |
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| 90 | ; |
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[136] | 91 | ; @restrictions |
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| 92 | ; The number of colors available on the display device (not the |
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| 93 | ; Postscript device) is used unless the NCOLORS keyword is used. |
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[2] | 94 | ; |
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[136] | 95 | ; @examples |
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| 96 | ; To display a horizontal color bar above a contour plot, type: |
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[2] | 97 | ; |
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[136] | 98 | ; IDL> LOADCT, 5, NCOLORS=100 |
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| 99 | ; IDL> CONTOUR, DIST(31,41), POSITION=[0.15, 0.15, 0.95, 0.75], $ |
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| 100 | ; IDL> C_COLORS=INDGEN(25)*4, NLEVELS=25 |
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| 101 | ; IDL> COLORBAR, NCOLORS=100 |
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[2] | 102 | ; |
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[231] | 103 | ; @history |
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[137] | 104 | ; Written by: David Fanning, 10 JUNE 96. |
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| 105 | ; 10/27/96: Added the ability to send output to PostScript. DWF |
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| 106 | ; 11/04/96: Substantially rewritten to go to screen or PostScript |
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| 107 | ; file without having to know much about the PostScript device |
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[2] | 108 | ; or even what the current graphics device is. DWF |
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[137] | 109 | ; 01/27/97: Added the RIGHT and TOP keywords. Also modified the |
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| 110 | ; way the TITLE keyword works. DWF |
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| 111 | ; 07/15/97: Fixed a problem some machines have with plots that have |
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| 112 | ; no valid data range in them. DWF |
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| 113 | ; 03/03/98: Add DISCRETE keyword, sebastien masson (smasson\@lodyc.jussieu.fr) |
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[133] | 114 | ; |
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[231] | 115 | ; @version |
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| 116 | ; $Id$ |
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[133] | 117 | ; |
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[2] | 118 | ;- |
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[231] | 119 | ; |
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[163] | 120 | PRO colorbar, BOTTOM=bottom, CB_CHARSIZE=cb_charsize, CB_CHARTHICK=cb_charthick $ |
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[137] | 121 | , CB_COLOR=cb_color, DIVISIONS=divisions, DISCRETE=discrete $ |
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| 122 | , CB_LABEL = cb_label, FORMAT=format, POSITION=position $ |
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| 123 | , MAX = max, MIN = min, NCOLORS = ncolors, PSCOLOR=pscolor $ |
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| 124 | , CB_TITLE = cb_title, VERTICAL = vertical, TOP = top, RIGHT = right $ |
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[155] | 125 | , CB_LOG = CB_log, NOTITLE = notitle, _EXTRA = ex |
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[114] | 126 | ; |
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| 127 | compile_opt idl2, strictarrsubs |
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| 128 | ; |
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[137] | 129 | ; Is the PostScript device selected? |
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[2] | 130 | postScriptDevice = (!D.NAME EQ 'PS') |
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| 131 | |
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| 132 | ; Check and define keywords. |
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| 133 | |
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| 134 | IF N_ELEMENTS(ncolors) EQ 0 THEN BEGIN |
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| 135 | |
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[137] | 136 | ; Most display devices to not use the 256 colors available to |
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| 137 | ; the PostScript device. This presents a problem when writing |
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| 138 | ; general-purpose programs that can be output to the display or |
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| 139 | ; to the PostScript device. This problem is especially bothersome |
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| 140 | ; if you don't specify the number of colors you are using in the |
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| 141 | ; program. One way to work around this problem is to make the |
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| 142 | ; default number of colors the same for the display device and for |
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| 143 | ; the PostScript device. Then, the colors you see in PostScript are |
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| 144 | ; identical to the colors you see on your display. Here is one way to |
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| 145 | ; do it. |
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[2] | 146 | |
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| 147 | IF postScriptDevice THEN BEGIN |
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| 148 | oldDevice = !D.NAME |
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| 149 | |
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[137] | 150 | ; What kind of computer are we using? SET_PLOT to appropriate |
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| 151 | ; display device. |
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[2] | 152 | |
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| 153 | thisOS = !VERSION.OS_FAMILY |
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| 154 | thisOS = STRMID(thisOS, 0, 3) |
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| 155 | thisOS = STRUPCASE(thisOS) |
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| 156 | CASE thisOS of |
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| 157 | 'MAC': SET_PLOT, thisOS |
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| 158 | 'WIN': SET_PLOT, thisOS |
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| 159 | ELSE: SET_PLOT, 'X' |
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| 160 | ENDCASE |
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| 161 | !p.BACKGROUND=(!d.n_colors-1) < 255 |
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| 162 | !p.color=0 |
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| 163 | if !d.n_colors gt 256 then !p.background='ffffff'x |
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| 164 | |
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[137] | 165 | ; Open a window (to make sure !D.N_COLORS is accurate). |
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[2] | 166 | |
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| 167 | WINDOW, /FREE, /PIXMAP, XSIZE=10, YSIZE=10 |
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| 168 | WDELETE, !D.WINDOW |
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| 169 | |
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[137] | 170 | ; Here is how many colors we should use. |
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[2] | 171 | |
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| 172 | ncolors = !D.N_COLORS |
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| 173 | SET_PLOT, oldDevice |
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| 174 | IF oldDevice EQ 'X' OR oldDevice EQ 'MAC' OR oldDevice EQ 'WIN' then BEGIN |
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| 175 | !p.BACKGROUND=(!d.n_colors-1) < 255 |
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| 176 | !p.color=0 |
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| 177 | if !d.n_colors gt 256 then !p.background='ffffff'x |
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| 178 | ENDIF |
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| 179 | ENDIF ELSE ncolors = !D.N_COLORS |
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| 180 | ENDIF |
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| 181 | IF N_ELEMENTS(bottom) EQ 0 THEN bottom = 0B |
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| 182 | IF N_ELEMENTS(cb_charsize) EQ 0 THEN cb_charsize = 1.0 |
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| 183 | IF N_ELEMENTS(cb_charthick) EQ 0 THEN cb_charthick = 1.0 |
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| 184 | IF N_ELEMENTS(format) EQ 0 THEN format = '(F6.2)' |
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| 185 | IF N_ELEMENTS(cb_color) EQ 0 THEN cb_color = ncolors - 1 + bottom |
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| 186 | IF N_ELEMENTS(min) EQ 0 THEN min = 0.0 |
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| 187 | IF N_ELEMENTS(max) EQ 0 THEN max = FLOAT(ncolors) - 1 |
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| 188 | IF N_ELEMENTS(divisions) EQ 0 THEN divisions = 2 |
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| 189 | IF N_ELEMENTS(cb_title) EQ 0 THEN cb_title = '' |
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| 190 | IF N_ELEMENTS(notitle) EQ 1 THEN cb_title = '' |
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| 191 | pscolor = KEYWORD_SET(pscolor) |
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| 192 | |
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| 193 | IF KEYWORD_SET(vertical) THEN BEGIN |
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[133] | 194 | IF KEYWORD_SET(discrete) THEN begin |
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| 195 | facteur=256/n_elements(discrete) |
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[136] | 196 | discrete=reform(replicate(1,facteur) # discrete,facteur*n_elements(discrete), /overwrite) |
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[133] | 197 | bar = REPLICATE(1B,10) # discrete |
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[2] | 198 | endif else bar = REPLICATE(1B,10) # BINDGEN(256) |
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| 199 | IF N_ELEMENTS(position) EQ 0 THEN position = [0.88, 0.15, 0.95, 0.95] |
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| 200 | ENDIF ELSE BEGIN |
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[133] | 201 | IF KEYWORD_SET(discrete) THEN begin |
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| 202 | facteur=256/n_elements(discrete) |
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[136] | 203 | discrete=reform(replicate(1,facteur) # discrete,facteur*n_elements(discrete), /overwrite) |
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[133] | 204 | bar = discrete # REPLICATE(1B,10) |
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[2] | 205 | endif else bar = BINDGEN(256) # REPLICATE(1B, 10) |
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| 206 | IF N_ELEMENTS(position) EQ 0 THEN position = [0.15, 0.88, 0.95, 0.95] |
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| 207 | ENDELSE |
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| 208 | |
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[137] | 209 | ; Scale the color bar. |
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[133] | 210 | IF NOT KEYWORD_SET(discrete) THEN $ |
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[2] | 211 | bar = BYTSCL(bar, TOP=ncolors-1) + bottom |
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| 212 | |
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[137] | 213 | ; Get starting locations in DEVICE coordinates. |
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[2] | 214 | |
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[114] | 215 | xstart = position[0] * !D.X_VSIZE |
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| 216 | ystart = position[1] * !D.Y_VSIZE |
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[2] | 217 | |
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[137] | 218 | ; Get the size of the bar in DEVICE coordinates. |
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[2] | 219 | |
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[114] | 220 | xsize = (position[2] - position[0]) * !D.X_VSIZE |
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| 221 | ysize = (position[3] - position[1]) * !D.Y_VSIZE |
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[2] | 222 | |
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[137] | 223 | ; For PostScript output only, draw the annotation in !P.COLOR |
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| 224 | ; unless "pscolor" is set. This makes better output on grayscale |
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| 225 | ; printers. |
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[2] | 226 | |
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| 227 | IF postScriptDevice AND (pscolor NE 1) THEN BEGIN |
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| 228 | oldcolor = cb_color |
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| 229 | cb_color = !P.COLOR |
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| 230 | ENDIF |
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| 231 | |
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[137] | 232 | ; Display the color bar in the window. Sizing is |
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| 233 | ; different for PostScript and regular display. |
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[2] | 234 | |
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| 235 | IF postScriptDevice THEN BEGIN |
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| 236 | |
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| 237 | TV, bar, xstart, ystart, XSIZE=xsize, YSIZE=ysize |
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| 238 | |
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| 239 | ENDIF ELSE BEGIN |
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| 240 | |
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[154] | 241 | IF CEIL(xsize) LT 0 OR CEIL(ysize) LT 0 THEN return |
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[2] | 242 | bar = CONGRID(bar, CEIL(xsize), CEIL(ysize), /INTERP) |
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| 243 | TV, bar, xstart, ystart |
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| 244 | |
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| 245 | ENDELSE |
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| 246 | |
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[137] | 247 | ; Annotate the color bar. |
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[2] | 248 | |
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| 249 | if keyword_set(cb_label) then begin |
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| 250 | divisions = n_elements(cb_label)-1 |
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| 251 | for i = 0,divisions DO cb_label = string(cb_label, FORMAT = format) |
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| 252 | format = '' |
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| 253 | ENDIF ELSE cb_label = '' |
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| 254 | |
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| 255 | |
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| 256 | IF KEYWORD_SET(vertical) THEN BEGIN |
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| 257 | |
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| 258 | IF KEYWORD_SET(right) THEN BEGIN |
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| 259 | |
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| 260 | PLOT, [min,max], [min,max], /NODATA, XTICKS=1, $ |
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| 261 | YTICKS=divisions, XSTYLE=1, YSTYLE=9, $ |
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| 262 | POSITION=position, COLOR=cb_color, CHARSIZE=cb_charsize, CHARTHICK=cb_charthick $ |
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| 263 | , /NOERASE, $ |
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| 264 | YTICKFORMAT='(A1)', XTICKFORMAT='(A1)', YTICKLEN=0.1 , $ |
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| 265 | YRANGE=[min, max], YTITLE=cb_title |
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| 266 | |
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| 267 | AXIS, YAXIS=1, YRANGE=[min, max], YTICKFORMAT=format, YTICKS=divisions, $ |
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| 268 | YTICKLEN=0.1, YSTYLE=1, COLOR=cb_color, CHARTHICK=cb_charthick $ |
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[19] | 269 | , CHARSIZE=cb_charsize, xtickname = cb_label, ylog = cb_log |
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[2] | 270 | |
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| 271 | ENDIF ELSE BEGIN |
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| 272 | |
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| 273 | PLOT, [min,max], [min,max], /NODATA, XTICKS=1, $ |
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| 274 | YTICKS=divisions, XSTYLE=1, YSTYLE=9, $ |
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| 275 | POSITION=position, COLOR=cb_color, CHARSIZE=cb_charsize $ |
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| 276 | , CHARTHICK=cb_charthick, /NOERASE, $ |
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| 277 | YTICKFORMAT=format, XTICKFORMAT='(A1)', YTICKLEN=0.1 , $ |
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| 278 | YRANGE=[min, max], xtickname = cb_label |
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| 279 | |
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| 280 | AXIS, YAXIS=1, YRANGE=[min, max], YTICKFORMAT='(A1)', YTICKS=divisions, $ |
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| 281 | YTICKLEN=0.1, YTITLE=cb_title, YSTYLE=1, COLOR=cb_color $ |
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[19] | 282 | , CHARSIZE=cb_charsize, CHARTHICK=cb_charthick, ylog = cb_log |
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[2] | 283 | |
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| 284 | ENDELSE |
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| 285 | |
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| 286 | ENDIF ELSE BEGIN |
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| 287 | |
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| 288 | IF KEYWORD_SET(top) THEN BEGIN |
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| 289 | |
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| 290 | PLOT, [min,max], [min,max], /NODATA, XTICKS=divisions, $ |
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| 291 | YTICKS=1, XSTYLE=9, YSTYLE=1, $ |
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| 292 | POSITION=position, COLOR=cb_color, CHARSIZE=cb_charsize $ |
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| 293 | , CHARTHICK=cb_charthick, /NOERASE, $ |
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| 294 | YTICKFORMAT='(A1)', XTICKFORMAT='(A1)', XTICKLEN=0.1, $ |
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| 295 | XRANGE=[min, max], XTITLE=cb_title |
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| 296 | |
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| 297 | AXIS, XTICKS=divisions, XSTYLE=1, COLOR=cb_color $ |
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| 298 | , CHARSIZE=cb_charsize, CHARTHICK=cb_charthick, $ |
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[19] | 299 | XTICKFORMAT=format, XTICKLEN=0.1, XRANGE=[min, max], XAXIS=1, xtickname = cb_label, xlog = cb_log |
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[2] | 300 | |
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| 301 | ENDIF ELSE BEGIN |
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| 302 | |
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| 303 | PLOT, [min,max], [min,max], /NODATA, XTICKS=divisions, $ |
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| 304 | YTICKS=1, XSTYLE=1, YSTYLE=1, $ |
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| 305 | POSITION=position, COLOR=cb_color, CHARSIZE=cb_charsize $ |
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| 306 | , CHARTHICK=cb_charthick, /NOERASE, $ |
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| 307 | YTICKFORMAT='(A1)', XTICKFORMAT=format, XTICKLEN=0.1, $ |
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[19] | 308 | XRANGE=[min, max], TITLE=cb_title, xtickname = cb_label, xlog = cb_log |
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[2] | 309 | |
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| 310 | ENDELSE |
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| 311 | |
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| 312 | ENDELSE |
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[137] | 313 | ; Restore color variable if changed for PostScript. |
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[2] | 314 | |
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| 315 | IF postScriptDevice AND (pscolor NE 1) THEN cb_color = oldcolor |
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| 316 | |
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| 317 | return |
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| 318 | END |
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