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C $Id: basic02f.f,v 1.15 2010-03-15 22:49:23 haley Exp $
C
C***********************************************************************
C *
C Copyright (C) 1995 *
C University Corporation for Atmospheric Research *
C All Rights Reserved *
C *
C***********************************************************************
C
C File: basic02f.f
C
C Author: Tim Scheitlin (converted by Ed Stautler)
C National Center for Atmospheric Research
C PO 3000, Boulder, Colorado
C
C Date: Mon Mar 20 10:43:42 MST 1995
C
C Description: The first frame in this example demonstrates how
C to set the view port for a contour plot.
C Note: no data is used in this example, so the
C output appears only as a bounding box with
C tickmarks.
C
C The second frame in this example demonstrates how
C to produce multiple plots on a single frame.
C
program basic02f
implicit none
external NhlFAppClass
external NhlFNcgmWorkstationClass
external NhlFPSWorkstationClass
external NhlFPDFWorkstationClass
external NhlFCairoPSPDFWorkstationClass
external NhlFCairoImageWorkstationClass
external NhlFCairoWindowWorkstationClass
external NhlFContourPlotClass
integer appid,wks,con1,rlist,ierr
character*7 wks_type
C
C Define the workstation type
C
wks_type = "x11"
C
C Initialize the graphics libraries and create a resource list that
C is normally used to assign name/value pairs within objects. Then
C clear (empty) this list, and create an application object. This
C object manages multiple resource databases used by separate objects.
C
call NhlFInitialize
call NhlFRLCreate(rlist,'SETRL')
call NhlFRLClear(rlist)
call NhlFCreate(appid,"basic02",NhlFAppClass,0,rlist,ierr)
C
C ###########
C # FRAME 1 #
C ###########
C Choose the type of output you want to create. You may write your
C output to an NCGM, file, X workstation window, or a PostScript file.
C
if (wks_type.eq."ncgm".or.wks_type.eq."NCGM") then
C
C Create an NCGM workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkMetaName','./basic02f.ncgm',ierr)
call NhlFCreate(wks,"wks",NhlFNcgmWorkstationClass,0,
1 rlist,ierr)
else if (wks_type.eq."x11".or.wks_type.eq."X11") then
C
C Create an X workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkPause','True',ierr)
call NhlFCreate(wks,"wks",
+ NhlFCairoWindowWorkstationClass,0,
1 rlist,ierr)
else if (wks_type.eq."oldps".or.wks_type.eq."OLDPS") then
C
C Create an older-style PostScript workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkPSFileName','./basic02f.ps',ierr)
call NhlFCreate(wks,"wks",NhlFPSWorkstationClass,0,
1 rlist,ierr)
C
C Create an older-style PDF workstation.
C
else if (wks_type.eq."oldpdf".or.wks_type.eq."OLDPDF") then
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkPDFFileName','./basic02f.pdf',
1 ierr)
call NhlFCreate(wks,"wks",NhlFPDFWorkstationClass,0,
1 rlist,ierr)
C
C Create a cairo PS/PDF object.
C
else if (wks_type.eq."pdf".or.wks_type.eq."PDF".or.
1 wks_type.eq."ps".or.wks_type.eq."PS") then
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkFileName','./basic02f',
1 ierr)
call NhlFRLSetstring(rlist,'wkFormat',wks_type,
1 ierr)
call NhlFCreate(wks,"wks",NhlFCairoPSPDFWorkstationClass,0,
1 rlist,ierr)
C
C Create a cairo PNG object.
C
else if (wks_type.eq."png".or.wks_type.eq."PNG") then
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkFileName','./basic02f',
1 ierr)
call NhlFRLSetstring(rlist,'wkFormat',wks_type,
1 ierr)
call NhlFCreate(wks,"wks",NhlFCairoImageWorkstationClass,0,
1 rlist,ierr)
endif
C
C
C Create a plot object. In this example, we will create a contour plot.
C
C Four view class resources, vpXF, vpYF, vpWidthF, and vpHeightF, are
C assigned values in the following create call. The combination of
C these four resources determines where the plot will display in the
C output window. The values of these resources are specified in
C Normalized Device Coordinates (NDCs). In this two-dimensional
C coordinate system (0,0) specifies the lower-left corner and (1,1)
C specifies the upper-right corner of a plot.
call NhlFRLClear(rlist)
call NhlFRLSetFloat(rlist,"vpXF",0.05,ierr)
call NhlFRLSetFloat(rlist,"vpYF",0.95,ierr)
call NhlFRLSetFloat(rlist,"vpWidthF",0.4,ierr)
call NhlFRLSetFloat(rlist,"vpHeightF",0.4,ierr)
call NhlFCreate(con1,"con1",NhlFContourPlotClass,wks,
$ rlist,ierr)
C
C Draw the plot.
C
call NhlFDraw(con1,ierr)
C
C The frame call updates and then clears the workstation.
C Anything written to the workstation after a frame call is made will be
C drawn in a subsequent frame.
C
call NhlFFrame(wks,ierr)
C
C ###########
C # FRAME 2 #
C ###########
C
C This example demonstrates drawing multiple plots in a single frame.
C
C Calling draw again will produce the identical plot that was drawn in
C the first frame.
C
call NhlFDraw(con1,ierr)
C
C To add another plot to the same frame, we first need to reset the
C viewport resources so that the next plot does not overwrite the first
C one. The setvalues expression is used to set resources after an object
C has already been created. The first argument, "con1", in the setvalues
C expression specifies an object id of a plot that was generated earlier
C with the create call. This is then followed by a list of resource
C value pairs that apply to the object.
C
call NhlFRLClear(rlist)
call NhlFRLSetFloat(rlist,"vpXF",0.55,ierr)
call NhlFRLSetFloat(rlist,"vpYF",0.45,ierr)
call NhlFRLSetFloat(rlist,"vpWidthF",0.2,ierr)
call NhlFRLSetFloat(rlist,"vpHeightF",0.2,ierr)
call NhlFSetValues(con1,rlist,ierr)
C
C Because of the new viewport resource settings, calling draw produces
C a plot in the lower-right quadrant of the frame.
C
call NhlFDraw(con1,ierr)
C
C Updates and clear the workstation.
C
call NhlFFrame(wks,ierr)
C
C Clean up (destroying the parent object recursively destroys all of its
C children).
C
call NhlFDestroy(con1,ierr)
call NhlFClose
stop
end
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