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PostponeRedraw

 
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Bercic



Joined: 17 May 2004
Posts: 25
Location: Slovenia

PostPosted: Thu Sep 24, 2015 4:29 am    Post subject: PostponeRedraw Reply with quote

Dear Mr. David,

I am trying to prevent that Dplot redraw plot after addition of each new curve by using PostponeRedraw() command. Please could you advice me how to correct the following code in order to get desired effect or describe where PostponeRedraw command should be placed in order to prevent intermediate redrawing?

FOR j=curvestart TO curveend
count=count+1
ret=DPlot_Command(DocNum, "[PostponeRedraw()][SelectCurve(" & STR$(j)& ")][MultipleYAxes(0,0,0)]")
ret = DPlot_AddData( DocNum, %DATA_XYXY, yalldata,J,xdata(1),dataLeft(1+yalldata*(count-1)))
DocNum=ret
NEXT

Best regards, Gorazd
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DPlotAdmin
Site Admin


Joined: 24 Jun 2003
Posts: 2290
Location: Vicksburg, Mississippi

PostPosted: Thu Sep 24, 2015 10:08 am    Post subject: Reply with quote

Unfortunately PostponeRedraw doesn't do anything with DPlot_AddData. But since you apparently don't want the plot updated until you're done, this should work:

Code:
ret=DPlot_Command(0,"[AppHide()]")
FOR j=curvestart TO curveend
count=count+1
ret = DPlot_AddData( DocNum, %DATA_XYXY, yalldata,J,xdata(1),dataLeft(1+yalldata*(count-1)))
DocNum=ret
NEXT
ret=DPlot_Command(0,"[AppShow()]")


Unless you're plotting 100's of thousands of points, DPlot won't actually have time to hide itself. But the plot won't be updated and you should see a significant increase in performance.
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David Hyde
support@dplot.com
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Bercic



Joined: 17 May 2004
Posts: 25
Location: Slovenia

PostPosted: Thu Sep 24, 2015 2:58 pm    Post subject: Reply with quote

Dear David thanks for prompt response and useful information about the way how to temporary prevent »flashing« of DPlot window.

Gorazd - frequent DPlot user. I use DPlot daily for quick analysis and presentation of experimental and simulated data.
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