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How export JavaScript visualizations to PNG properly


Emilia Ortn Gmez

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Hi everyone! I have had some troubles when exporting visualizations type JsViz.

Apparently, it exports the visualization without renderingthe js script first, and the result only shows the canvas with the initial HTML/CSS structure. In the image exported, the visualizations look the same as when I click the option 'Suspend Rendering' in the tab 'Rendering' from JS Visualization Properties.

Besides, I incremented the 'Export Delay' just in case, but it doesn't work either.

 

 

I am using other libraries in addition to JSViz, like Chart.js; I don't know if the problem could comefrom that.

 

Itried to do thisvia File/Export/... and also via IronPython scripting with the code below, but the problem persists in both cases.

import sys

from System.IO import *

from Spotfire.Dxp.Application.Visuals import *

from System.Drawing import Size, Image

from System.Drawing.Imaging import ImageFormat

from System.Threading import CancellationToken

from System.Threading import Thread

from Spotfire.Dxp.Framework.ApplicationModel import ApplicationThread

 

 

app = Application.GetService[ApplicationThread]()

pages=Document.Pages

 

# RenderResultSettings

rsettings=RenderResultSettings(Size(1225,700))

rsettings.Resolution=ImageResolution.High

 

 

#VisualRenderSettings

vsettings=VisualRenderSettings()

vsettings.ShowTitle=Visibility.Visible

 

 

#PageRenderSettings

psettings=PageRenderSettings()

psettings.ShowTitle=Visibility.Visible

psettings.VisualRenderSettings=vsettings

 

def asyncshot(pages):

 

def f():

 

for page in pages:

#print page.Title

Document.ActivePageReference = page

for visual in page.Visuals:

try:

 

renderResult=visual.RenderAsync(rsettings,vsettings,CancellationToken(False))

if renderResult.Result.IsValid:

image=renderResult.Result.AsImage()

#print type(image)

#image.Dispose()

 

tempFolder = Path.GetTempPath()

 

print tempFolder

 

image.Save(tempFolder+page.Title+visual.Title+".bmp")

 

except Exception , e:

print 'Error: ' + e.ToString()

 

 

return f()

 

 

app.InvokeAsynchronously(asyncshot(pages))Also, I tried this code (with 'Render' method which isdeprecated), but it gave me a similar result.

from System.IO import *

from Spotfire.Dxp.Application.Visuals import VisualContent

from System.Drawing import Bitmap, Graphics, Rectangle, Point

 

for visual in Document.ActivePageReference.Visuals:

#print visual.Title

 

#export graphic to temp file

vc = visual.As[VisualContent]()

bm = Bitmap(2000, 1200)

g = Graphics.FromImage(bm)

r = Rectangle(Point(0,0), bm.Size)

vc.Render(g, r)

file = Path.GetTempFileName()

print(file)

bm.Save(file)

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