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|
;+
; NAME:
; PICKCOLOR
;
; PURPOSE:
;
; A modal dialog widget allowing the user to select
; the RGB color triple specifying a color. The return
; value of the function is the color triple specifying the
; color or the "name" of the color if the NAME keyword is set.
;
; AUTHOR:
; FANNING SOFTWARE CONSULTING:
; David Fanning, Ph.D.
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: davidf@dfanning.com
; Coyote's Guide to IDL Programming: http://www.dfanning.com
;
; CATEGORY:
;
; Graphics, Color Specification. See related program cgCOLOR.
;
; CALLING SEQUENCE:
;
; color = PickColor(colorindex)
;
; RETURN VALUE:
;
; The return value of the function is a 1-by-3 array containing
; the values of the color triple that specifies the selected color.
; The color can be loaded, for example, in any color index:
;
; color = PickColor(240)
; TVLCT, color, 240
;
; The return value is the original color triple if the user
; selects the CANCEL button.
;
; IF the NAMES keyword is set, the return value of the function is
; the "name" of the selected color. This would be appropriate for
; passing to the cgCOLOR program, for example.
;
; OPTIONAL INPUT POSITIONAL PARAMETERS:
;
; COLORINDEX: The color index of the color to be changed. If not
; specified the color index !D.Table_Size - 2 is used.
; The Current Color and the Color Sliders are set to the
; values of the color at this color index.
;
; OPTIONAL INPUT KEYWORD PARAMETERS:
;
; GROUP_LEADER: The group leader for this widget program. This
; keyword is required for MODAL operation. If not supplied
; the program is a BLOCKING widget. Be adviced, however, that
; the program will NOT work if called from a blocking widget
; program, unless a GROUP_LEADER is supplied.
;
; NAMES: Set this keyword to return the "name" of the selected color
; rather than its color triple.
;
; STARTINDEX: 88 pre-determined colors are loaded The STARTINDEX
; is the index in the color table where these 88 colors will
; be loaded. By default, it is !D.Table_Size - 89.
;
; TITLE: The title on the program's top-level base. By default the
; title is "Pick a Color".
;
; OPTIONAL INPUT KEYWORD PARAMETERS:
;
; CANCEL: A keyword that is set to 1 if the CANCEL button is selected
; and to 0 otherwise.
;
; COMMON BLOCKS:
;
; None.
;
; SIDE EFFECTS:
;
; 88 pre-determined colors are loaded in the color table.
; In addition, the color index at COLORINDEX is modified while
; the program is on the display. When the program exits, the
; entry color table is restored. Thus, on 8-bit displays there
; might be some color effects in graphics windows while PICKCOLOR
; is on the display. Changes in the color table are not noticable
; on 16-bit and 24-bit displays.
;
; EXAMPLE:
;
; To specify a color for a plot in color decomposition OFF mode:
;
; Device, Decomposed=0
; !P.Color = !P.Color < (!D.Table_Size - 1)
; color = PickColor(!P.Color, Cancel=cancelled)
; IF NOT cancelled THEN BEGIN
; TVLCT, color, !P.Color
; Plot, data
; ENDIF
;
; To specify a color for a plot in color decomposition ON mode:
;
; Device, Decomposed=1
; color = PickColor(Cancel=cancelled)
; !P.Color = Color24(color)
; IF NOT cancelled THEN Plot, data
;
; To obtain the name of the selected color to pass to GetColor:
;
; selectedColor = PickColor(/Name)
; axisColor = cgColor(selectedColor, !D.Table_Size-4)
;
; MODIFICATION HISTORY:
; Written by: David Fanning, 28 Oct 99.
; Added NAME keyword. 18 March 2000, DWF.
; Fixed a small bug when choosing a colorindex less than !D.Table_Size-17. 20 April 2000. DWF.
; Added actual color names to label when NAMES keyword selected. 12 May 2000. DWF.
; Modified to use 88 colors and cgCOLOR instead of 16 colors and GETCOLOR. 4 Dec 2000. DWF.
; Changed FSC_Color to cgColor everywhere. 16 Jan 2013. DWF.
;-
;
;###########################################################################
;
; LICENSE
;
; This software is OSI Certified Open Source Software.
; OSI Certified is a certification mark of the Open Source Initiative.
;
; Copyright � 2000 Fanning Software Consulting.
;
; This software is provided "as-is", without any express or
; implied warranty. In no event will the authors be held liable
; for any damages arising from the use of this software.
;
; Permission is granted to anyone to use this software for any
; purpose, including commercial applications, and to alter it and
; redistribute it freely, subject to the following restrictions:
;
; 1. The origin of this software must not be misrepresented; you must
; not claim you wrote the original software. If you use this software
; in a product, an acknowledgment in the product documentation
; would be appreciated, but is not required.
;
; 2. Altered source versions must be plainly marked as such, and must
; not be misrepresented as being the original software.
;
; 3. This notice may not be removed or altered from any source distribution.
;
; For more information on Open Source Software, visit the Open Source
; web site: http://www.opensource.org.
;
;###########################################################################
PRO PickColor_CenterTLB, tlb
Device, Get_Screen_Size=screenSize
xCenter = screenSize(0) / 2
yCenter = screenSize(1) / 2
geom = Widget_Info(tlb, /Geometry)
xHalfSize = geom.Scr_XSize / 2
yHalfSize = geom.Scr_YSize / 2
Widget_Control, tlb, XOffset = xCenter-xHalfSize, $
YOffset = yCenter-yHalfSize
END ;---------------------------------------------------------------------------
PRO PickColor_Select_Color, event
; This event handler permits color selection by clicking on a color window.
Widget_Control, event.top, Get_UValue=info, /No_Copy
; Get the color names from the window you clicked on.
Widget_Control, event.id, Get_UValue=thisColorName
IF info.needsliders EQ 0 THEN Widget_Control, info.labelID, Set_Value=thisColorName
; Get the color value and load it as the current color.
WSet, info.currentWID
thisColor = cgColor(thisColorName, /Triple)
info.currentName = thisColorName
TVLCT, thisColor, info.currentColorIndex
PolyFill, [0,0,1,1,0], [0,1,1,0,0], /Normal, Color=info.currentColorIndex
IF info.needSliders THEN BEGIN
; Update the slider values to this color value.
Widget_Control, info.redID, Set_Value=thisColor[0,0]
Widget_Control, info.greenID, Set_Value=thisColor[0,1]
Widget_Control, info.blueID, Set_Value=thisColor[0,2]
ENDIF
Widget_Control, event.top, Set_UValue=info, /No_Copy
END ;---------------------------------------------------------------------------
PRO PickColor_Sliders, event
; This event handler allows the user to mix their own color.
Widget_Control, event.top, Get_UValue=info, /No_Copy
; Get the color slider values.
Widget_Control, info.redID, Get_Value=red
Widget_Control, info.greenID, Get_Value=green
Widget_Control, info.blueID, Get_Value=blue
; Load the new color as the current color.
WSet, info.currentWID
TVLCT, red, green, blue, info.currentColorIndex
PolyFill, [0,0,1,1,0], [0,1,1,0,0], /Normal, Color=info.currentColorIndex
Widget_Control, event.top, Set_UValue=info, /No_Copy
END ;---------------------------------------------------------------------------
PRO PickColor_Buttons, event
; This event handler responds to CANCEL and ACCEPT buttons.
Widget_Control, event.top, Get_UValue=info, /No_Copy
Widget_Control, event.id, Get_Value=buttonValue
CASE buttonValue OF
'Cancel': BEGIN
TVLCT, info.r_old, info.g_old, info.b_old ; Restore old color table.
Widget_Control, event.top, /Destroy ; Exit.
ENDCASE
'Accept': BEGIN
TVLCT, r, g, b, /Get ; Get the new color table.
TVLCT, info.r_old, info.g_old, info.b_old ; Restore old color table.
; Save the new color in the form info pointer.
*(info.ptr) = {cancel:0.0, r:r[info.currentColorIndex], g:g[info.currentColorIndex], $
b:b[info.currentColorIndex], name:info.currentName}
Widget_Control, event.top, /Destroy ; Exit
ENDCASE
ENDCASE
END ;---------------------------------------------------------------------------
FUNCTION PickColor, currentColorIndex, StartIndex=startIndex, Title=title, $
Group_Leader=groupLeader, Cancel=cancelled, Names=name
; Device must support windows.
IF (!D.FLAGS AND 256) EQ 0 THEN BEGIN
Message, 'Device must support windows. Returning...', /Continue
cancelled = 1
RETURN, -1
ENDIF
; Working in decomposed color space with defined number of colors.
; Save decomposed state and restore it, if possible.
IF Float(!Version.Release) GE 5.2 THEN BEGIN
Device, Get_Decomposed=decomposedState
ENDIF ELSE decomposedState = 0
Device, Decomposed=0
NCOLORS = 88
; Check parameters.
IF N_Elements(title) EQ 0 THEN title = 'Pick a Color'
IF N_Elements(startIndex) EQ 0 THEN startIndex = !D.Table_Size - (NCOLORS + 1)
startIndex = startIndex < (!D.Table_Size - (NCOLORS + 1))
IF N_Elements(currentColorIndex) EQ 0 THEN currentColorIndex = (startIndex + NCOLORS - 1)
currentColorIndex = currentColorIndex < 255
IF Keyword_Set(name) THEN needSliders = 0 ELSE needSliders = 1
; Get the current color tables so they can be restored on exit.
TVLCT, r_old, g_old, b_old, /Get
; Load the new drawing colors and get their names.
colors= ['White']
red = [ 255]
green = [ 255]
blue = [ 255]
colors= [ colors, 'Snow', 'Ivory','Light Yellow', 'Cornsilk', 'Beige', 'Seashell' ]
red = [ red, 255, 255, 255, 255, 245, 255 ]
green = [ green, 250, 255, 255, 248, 245, 245 ]
blue = [ blue, 250, 240, 224, 220, 220, 238 ]
colors= [ colors, 'Linen','Antique White', 'Papaya', 'Almond', 'Bisque', 'Moccasin' ]
red = [ red, 250, 250, 255, 255, 255, 255 ]
green = [ green, 240, 235, 239, 235, 228, 228 ]
blue = [ blue, 230, 215, 213, 205, 196, 181 ]
colors= [ colors, 'Wheat', 'Burlywood', 'Tan', 'Light Gray', 'Lavender','Medium Gray' ]
red = [ red, 245, 222, 210, 230, 230, 210 ]
green = [ green, 222, 184, 180, 230, 230, 210 ]
blue = [ blue, 179, 135, 140, 230, 250, 210 ]
colors= [ colors, 'Gray', 'Slate Gray', 'Dark Gray', 'Charcoal', 'Black', 'Light Cyan' ]
red = [ red, 190, 112, 110, 70, 0, 224 ]
green = [ green, 190, 128, 110, 70, 0, 255 ]
blue = [ blue, 190, 144, 110, 70, 0, 255 ]
colors= [ colors,'Powder Blue', 'Sky Blue', 'Steel Blue','Dodger Blue', 'Royal Blue', 'Blue' ]
red = [ red, 176, 135, 70, 30, 65, 0 ]
green = [ green, 224, 206, 130, 144, 105, 0 ]
blue = [ blue, 230, 235, 180, 255, 225, 255 ]
colors= [ colors, 'Navy', 'Honeydew', 'Pale Green','Aquamarine','Spring Green', 'Cyan' ]
red = [ red, 0, 240, 152, 127, 0, 0 ]
green = [ green, 0, 255, 251, 255, 250, 255 ]
blue = [ blue, 128, 240, 152, 212, 154, 255 ]
colors= [ colors, 'Turquoise', 'Sea Green','Forest Green','Green Yellow','Chartreuse', 'Lawn Green' ]
red = [ red, 64, 46, 34, 173, 127, 124 ]
green = [ green, 224, 139, 139, 255, 255, 252 ]
blue = [ blue, 208, 87, 34, 47, 0, 0 ]
colors= [ colors, 'Green', 'Lime Green', 'Olive Drab', 'Olive','Dark Green','Pale Goldenrod']
red = [ red, 0, 50, 107, 85, 0, 238 ]
green = [ green, 255, 205, 142, 107, 100, 232 ]
blue = [ blue, 0, 50, 35, 47, 0, 170 ]
colors =[ colors, 'Khaki', 'Dark Khaki', 'Yellow', 'Gold','Goldenrod','Dark Goldenrod']
red = [ red, 240, 189, 255, 255, 218, 184 ]
green = [ green, 230, 183, 255, 215, 165, 134 ]
blue = [ blue, 140, 107, 0, 0, 32, 11 ]
colors= [ colors,'Saddle Brown', 'Rose', 'Pink', 'Rosy Brown','Sandy Brown', 'Peru']
red = [ red, 139, 255, 255, 188, 244, 205 ]
green = [ green, 69, 228, 192, 143, 164, 133 ]
blue = [ blue, 19, 225, 203, 143, 96, 63 ]
colors= [ colors,'Indian Red', 'Chocolate', 'Sienna','Dark Salmon', 'Salmon','Light Salmon' ]
red = [ red, 205, 210, 160, 233, 250, 255 ]
green = [ green, 92, 105, 82, 150, 128, 160 ]
blue = [ blue, 92, 30, 45, 122, 114, 122 ]
colors= [ colors, 'Orange', 'Coral', 'Light Coral', 'Firebrick', 'Brown', 'Hot Pink' ]
red = [ red, 255, 255, 240, 178, 165, 255 ]
green = [ green, 165, 127, 128, 34, 42, 105 ]
blue = [ blue, 0, 80, 128, 34, 42, 180 ]
colors= [ colors, 'Deep Pink', 'Magenta', 'Tomato', 'Orange Red', 'Red', 'Violet Red' ]
red = [ red, 255, 255, 255, 255, 255, 208 ]
green = [ green, 20, 0, 99, 69, 0, 32 ]
blue = [ blue, 147, 255, 71, 0, 0, 144 ]
colors= [ colors, 'Maroon', 'Thistle', 'Plum', 'Violet', 'Orchid','Medium Orchid']
red = [ red, 176, 216, 221, 238, 218, 186 ]
green = [ green, 48, 191, 160, 130, 112, 85 ]
blue = [ blue, 96, 216, 221, 238, 214, 211 ]
colors= [ colors,'Dark Orchid','Blue Violet', 'Purple']
red = [ red, 153, 138, 160 ]
green = [ green, 50, 43, 32 ]
blue = [ blue, 204, 226, 240 ]
colorNames = colors
nameIndex = currentColorIndex - startIndex
IF nameIndex GE 0 AND nameIndex LE N_Elements(colorNames) THEN BEGIN
currentName = colorNames[nameIndex]
ENDIF ELSE currentName = ""
TVLCT, red, green, blue, startIndex
TVLCT, r, g, b, /Get
IF Keyword_Set(name) THEN labelTitle = currentName ELSE labelTitle = 'Current Color'
; Create the widgets. TLB is MODAL or BLOCKING.
IF N_Elements(groupLeader) EQ 0 THEN BEGIN
tlb = Widget_Base(Title=title, Column=1, /Base_Align_Center)
ENDIF ELSE BEGIN
tlb = Widget_Base(Title=title, Column=1, /Base_Align_Center, /Modal, $
Group_Leader=groupLeader)
ENDELSE
colorbaseID = Widget_Base(tlb, Column=11, Event_Pro='PickColor_Select_Color')
drawID = LonArr(88)
FOR j=0,NCOLORS-1 DO BEGIN
drawID[j] = Widget_Draw(colorbaseID, XSize=20, YSize=15, $
UValue=colorNames[j], Button_Events=1)
ENDFOR
currentID = Widget_Base(tlb, Column=1, Base_Align_Center=1)
labelID = Widget_Label(currentID, Value=labelTitle, /Dynamic_Resize)
currentColorID = Widget_Draw(currentID, XSize=60, YSize=15)
IF needSliders THEN BEGIN
sliderbase = Widget_Base(tlb, COLUMN=1, FRAME=1, BASE_ALIGN_CENTER=1, $
EVENT_PRO='PickColor_Sliders')
label = Widget_Label(sliderbase, Value='Specify a Color')
; Set the current color values in sliders.
redID = Widget_Slider(sliderbase, Scr_XSize=200, Value=r[currentColorIndex], $
Max=255, Min=0, Title='Red')
greenID = Widget_Slider(sliderbase, Scr_XSize=200, Value=g[currentColorIndex], $
Max=255, Min=0, Title='Green')
blueID = Widget_Slider(sliderbase, Scr_XSize=200, Value=b[currentColorIndex], $
Max=255, Min=0, Title='Blue')
ENDIF ELSE BEGIN
redID = 0L
greenID = 0L
blueID = 0L
ENDELSE
buttonbase = Widget_Base(tlb, ROW=1, Align_Center=1, Event_Pro='PickColor_Buttons')
cancelID = Widget_Button(buttonbase, VALUE='Cancel')
acceptID = Widget_Button(buttonbase, VALUE='Accept')
; Center the TLB.
PickColor_CenterTLB, tlb
Widget_Control, tlb, /Realize
; Load the drawing colors.
wids = IntArr(NCOLORS)
FOR j=0, NCOLORS-1 DO BEGIN
Widget_Control, drawID[j], Get_Value=thisWID
wids[j] = thisWID
WSet, thisWID
PolyFill, [0,0,1,1,0], [0,1,1,0,0], /Normal, Color=startIndex + j
ENDFOR
; Load the current color.
Widget_Control, currentColorID, Get_Value=currentWID
WSet, currentWID
TVLCT, r[currentColorIndex], g[currentColorIndex], b[currentColorIndex], currentColorIndex
PolyFill, [0,0,1,1,0], [0,1,1,0,0], /Normal, Color=currentColorIndex
; Pointer to hold the form information.
ptr = Ptr_New({cancel:1.0, r:r_old[currentColorIndex], g:g_old[currentColorIndex], $
b:b_old[currentColorIndex], name:currentName})
; Info structure for program information.
info = { ptr:ptr, $ ; The pointer to the form information.
r_old:r_old, $ ; The old color table.
g_old:g_old, $
b_old:b_old, $
r:r, $ ; The new color table.
g:g, $
b:b, $
labelID:labelID, $
needSliders:needSliders, $ ; A flag that indicates if sliders are needed.
redID:redID, $ ; The IDs of the color sliders.
greenID:greenID, $
blueID:blueID, $
currentName:currentName, $ ; The current color name.
currentColorIndex:currentColorIndex, $ ; The current color index.
currentWID:currentWID, $ ; The current color window index number.
wids:wids $ ; The window index number of the drawing colors.
}
Widget_Control, tlb, Set_UValue=info, /No_Copy
XManager, 'pickcolor', tlb ; Block here until widget program is destroyed.
; Retrieve the color information.
colorInfo = *ptr
Ptr_Free, ptr
cancelled = colorInfo.cancel
; Restore decomposed state if possible.
IF Float(!Version.Release) GE 5.2 THEN Device, Decomposed=decomposedState
; Return the color triple.
IF Keyword_Set(name) THEN RETURN, colorInfo.name ELSE $
RETURN, Reform([colorInfo.r, colorInfo.g, colorInfo.b], 1, 3)
END
|
