Re: Legends

To follow up, I did indeed find a problem that involved the line
buffer not being flushed properly in all cases. This only shows up in
the Legend when
the lgBoxLinesOn is set True and the lgBoxLineDashPattern is set to
"SolidLine". So presuming that you only have the box lines turned on
in order to
show the space occupied by the individual Legend items, this will not
be a problem for you. However, in a few days, we can give you a new
binary if
you need it.

Also I forgot to mention another resource you might want to play
with: lgLineLabelDashSegLenF. This specifies the length of dash
segment before it starts to repeat.
Since the line labels are actually part of the dash pattern, if the
dash segment length is too short, you may see multiple instances of
the label within the legend item.
  -dave

On Nov 10, 2008, at 5:48 PM, David Brown wrote:

> Hi Rosemarie,
>
> It would be helpful to know what you ultimately want your legend
> to look like. Do you really want it to be as wide as your script
> suggests?
> Why are you not using the regular legend labels to label your
> lines? Because you couldn't figure out how to set the size? Or was it
> something else, like wanting the label color to match the line color?
>
> Some resources that you may not know about are:
>
> lgAutoManage: when set True, the Legend label font size is set
> automatically. Setting this False allows you to control the label
> font sizes.
> It does not affect the line label font size (these are actually
> part of the line pattern).
>
> lgBoxMinorExtentF : this basically controls the fraction of the
> legend as a whole that the boxes occupy in the direction orthogonal
> to the sequence of legend lines.
> By default it is .5, to leave plenty of room for the legend labels.
> However, if you have turned the labels off, setting this resource
> to a larger value will cause
> the boxes to be wider (assuming the legend lines oriented in a
> vertical sequence). If you set it to 1.0, then the boxes will
> occupy the full width of the space allotted by
> vpWidthF if you also set lgLeftMarginF and lgRightMarginF to 0.0.
>
> lgBoxMajorExtentF: this controls the spacing between each box (in
> the vertical direction, given the orientation you have set up for
> your legend).
>
> I hope this helps. As I stated above, it would be helpful to have a
> better sense of what you want your ultimate result to look like.
> -dave
>
> P.S. I am noticing an anomaly in your legend that could be a bug in
> the code. When I run your code, the second two lines appear not to
> restore all the line properties
> after the line label text is drawn. I will look into this.
>
>
> On Nov 10, 2008, at 2:24 PM, Rosemarie Drummond wrote:
>
>> Hi,
>> I am trying to add a legend to a plot. Below is the ncl script
>> just for this legend part. I am attaching a ps file created by it.
>> I have put lgBoxLinesOn = True so that it shows how much white
>> space it puts each side of the actual legends.
>> I would like this white space to be very small and the text to be
>> bigger. The actual line segments could be shorter but that does
>> not seem to be settable.
>> Any advice would be gladly received
>> Rosemarie
>>
>>
>>
>>
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_code.ncl"
>> load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/gsn_csm.ncl"
>> begin
>> ncolors = 9
>> cmap = new((/ncolors,3/), float)
>> cmap = (/ (/1.0,1.0,1.0/), \
>> (/0.0,0.0,0.0/), \
>> (/1.0,0.0,0.0/), \
>> (/0.0,1.0,0.0/), \
>> (/0.0,0.0,1.0/), \
>> (/0.0,1.0,1.0/), \
>> (/1.0,0.0,0.80/), \
>> (/1.0,0.50,0.0/), \
>> (/0.90,0.90,0.90/)/)
>>
>> xworkid = gsn_open_wks("ps","Vtst")
>>
>> setvalues xworkid
>> "wkColorMap" : cmap
>> end setvalues
>> getvalues xworkid
>> "wkDefGraphicStyleId": gsid
>> end getvalues
>>
>>
>> Lg_id = create "Legend" legendClass xworkid
>> "vpXF" : 0.3
>> "vpYF" : 0.5
>> "vpWidthF" : 0.70
>> "vpHeightF" : 0.18
>> "lgItemCount" : 3
>> ; "lgPerimOn" : False
>> "lgBoxLinesOn" : True
>> "lgLeftMarginF" : 0.01
>> "lgRightMarginF" : 0.01
>>
>> "lgLabelsOn" : False
>> "lgLabelFont" : 30
>> "lgLabelFontHeightF" : .07
>> "lgLabelStrings" : (/" D:F35:)):F30: Models"," VM5a"," VM2"/)
>>
>> "lgDashIndexes" : (/16,0,0/)
>> "lgMonoLineThickness" : False
>> "lgLineThicknesses" : (/3.,6.,6./)
>> "lgLineColors" : (/4,3,2/)
>>
>> ; "lgMonoLabelFontColor" : False invalid
>> ; "lgLabelFontColors" : (/4,3,2/) invalid
>>
>> "lgMonoLineLabelFontHeight" : False
>> "lgLineLabelFontHeights" : (/0.02,0.02,0.02/)
>> "lgLineLabelFontThicknessF" : 3
>> "lgLineLabelFontColors" : (/4,3,2/)
>> "lgLineLabelStrings" : (/"VM5b-#","VM5a ","VM2 "/)
>> "lgLineLabelFont" : 30
>>
>> end create
>> draw(Lg_id)
>>
>> end
>>
>> --
>> Dr Rosemarie Drummond
>> rmarie_at_atmosp.physics.utoronto.ca
>>
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Received on Mon Nov 10 2008 - 18:52:00 MST