;+
; PROJECT:
;           Solar-B EIS
;
; NAME:
;           eis_plot_xtw
;
; PURPOSE:
;           Plots any of given resource item on the resource row
;
; CATEGORY:
;           Planning, Science
;
; EXPLANATION:
;           This routine plots any of the resource items on the science
;           plan display. Currently, DSN contact times, commanding times
;           (throughput RCR), and delayed commanding times
;           (payload_reserved) should be plotted on the same row; Other
;           station events should be plotted on the other row.
;
; SYNTAX:
;           plot_resource, resource, startdis, row
;
; INPUTS:
;           RESOURCE -  Array of {eis_timeline_graphics_resource} structures
;                       that has at least the following tags:
;               RES_NAME   - Resource type (name of resource item)
;               START_TIME - The beginning times of the resource item, in TAI
;               end_time   - The end times of the resource item, in TAI
;
;           STARTDIS - Start time of the display, in any CDS time format
; KEYWORDS:
;           ROW       - row number in which the item is plotted (default: 0)
;
; RESTRICTIONS:
;           PLOT_FRAME must be called first.
;
; WRITTEN
;           John A Rainnie RAL 5-May-2009
;
; HISTORY
;
;-
;************************************************************************
PRO eis_plot_xtw, xtw , startdis , row = row

datastart      = anytim2utc(startdis)
datastart.time = 0
daystart       = utc2tai(datastart) ; start of STARTDIS in TAI

t1    = (xtw.start_time - daystart) / 3600.d0
t2    = (xtw.stop_time  - daystart) / 3600.d0
color = 5

;---------------------------------------------------------------------------
;  Match number of sub rows in the resource row
;---------------------------------------------------------------------------
num_rows = 1;
;---------------------------------------------------------------------------
;  Sub-row width refelcts the fact that there is 5% of space reserved
;  in the bottom and top of the row
;---------------------------------------------------------------------------
sub_row  = 0
srow_wid = 0.9/num_rows

y1 = row + 0.05 + (sub_row * srow_wid)
y2 = y1  + srow_wid
x1 = t1 > !x.crange(0)
x2 = t2 < !x.crange(1)
IF (x2 GT x1) THEN POLYFILL , [x1 , x2 , x2 , x1] ,                         $
                              [y1 , y1 , y2 , y2] , color = color


END