Re: problem using key_pane with JPlotLayout

[Donald Denbo <dwd@pmel.noaa.gov>]

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Rich,
         This is a problem related to not having a Graphics object at the 
point when the JPane first tries to draw.  I've fixed this problem in the 
new release which I am putting the final touches on now (mostly 
documentation related).  I expect to have SGT version 2.1 available 
tomorrow.  When it is ready I will notify the sgt mailing list.

Don

At 04:51 PM 12/13/2001 -0800, Schramm, Rich wrote:
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>Message from the sgt mail list.
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>
>I am having difficulty using extracting the key_pane from a JPlotLayout 
>into a scrollable panel (e.g. as per the NOAATech2002 SGT Tutorials.
>
>If I set the is_key_pane parameter to true as in:
>
>layout_ = new JPlotLayout(false, false, false, "Trajectory Data", null, 
>true);
>
>and procede with other code to extract and use the key pane.  Then when I 
>go to add the line data I get:
>
>  java.lang.NullPointerException         at 
> gov.noaa.pmel.sgt.LabelDrawer2.getFontRenderContext(LabelDrawer2.java:520) 
> at 
> gov.noaa.pmel.sgt.LabelDrawer2.computeFontSize(LabelDrawer2.java:414) 
> at 
> gov.noaa.pmel.sgt.LabelDrawer2.computeBoundsD(LabelDrawer2.java:325) 
> at 
> gov.noaa.pmel.sgt.LabelDrawer2.getBounds(LabelDrawer2.java:264)      at 
> gov.noaa.pmel.sgt.SGLabel.getBounds(SGLabel.java:470)        at 
> gov.noaa.pmel.sgt.LineKey.getBounds(LineKey.java:545)        at 
> gov.noaa.pmel.sgt.LineKey.getRowHeight(LineKey.java:421)     at 
> gov.noaa.pmel.sgt.swing.JPlotLayout.addData(JPlotLayout.java:864)    at 
> gov.noaa.pmel.sgt.swing.JPlotLayout.addData(JPlotLayout.java:587)    at 
> gov.noaa.pmel.sgt.demo.JTimeSeriesDemo.makeGraph(JTimeSeriesDemo.java:138) 
> at gov.noaa.pmel.sgt.demo.JTimeSeriesDemo.main(JTimeSeriesDemo.java:96)
>
>
>
>The problems seems to be down in or below the "line_key.getRowHeight" 
>method which is called several times in JPlotLayout.java
>
>Can anyone demonstate a similar problem?  Im on W2k w/JDK 1.3.1_01 - maybe 
>I should go back to 1.2 or should this work?
>
>Also in same tutorial, it references 2 classes that I cant find... 
>KeyPaneLayout and LineBorder, any help there?
>
>
>Thanks in advance for any help.
>
>Rich Schramm
>
>
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Donald W. Denbo    dwd@pmel.noaa.gov
Ph: (206) 526-4487   Fax: (206) 526-6744
Collaborative tools: http://www.epic.noaa.gov/collab/
Netcdf Browser: http://www.epic.noaa.gov/java/ncBrowse
Scientific Java Graphics: http://www.epic.noaa.gov/java/sgt
EPIC Oceangraphic Data Management: http://www.pmel.noaa.gov/epic
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