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Certain PDFs when zoomed in are "jumping" around

Since approx after 19.2 specifically on Android this wild behaviour drives users crazy. Multi layered (but not only) documents once loaded into view are required a zoom in and markup. 

What happens is they zoom in and scroll into another area of the page, but after pinch, when you lift fingers the view jumps either into left top corner or random position, but not the one you left it.

Has anyone seen this kind of stuff?


24 Replies
VD Vikram Devaraj Syncfusion Team February 17, 2022 04:38 PM UTC

Hi YR,

Greetings from Syncfusion support, 


We were unable to reproduce the issue, “Zooming in and markup the PDF will jumping around” and it is working as expected. Could you please try the attached sample and let us know whether we have missed out anything while replicating the issue. 

  

Kindly share the following details to analyze more on this issue and assist you with the better solution   

1.Simple sample/ modify the attached sample to reproduce the issue.  

2.Replication video/procedure to reproduce the issue. 

3.PDF document  

4. Device info.


Regards, 
Vikram


Attachment: 172950_de8433d.zip

YR YR February 18, 2022 11:31 PM UTC

Hi Vikram,

Thanks for prompt reply! Please find attached video and your modified project to reproduce the unwanted behaviour.

Kind regards, Yury.



Attachment: SavePDFSample_d6dc5677.zip

SP SarathKumar Prakash Syncfusion Team February 21, 2022 06:10 AM UTC

Hi YR,

We were able to reproduce the issue, “Zoom In is not working properly for particular PDF and jumping into random position after Zoom In”. Currently, we are validating this issue and we will update the further details on February 23, 2022. 

Regards,
Sarath Kumar. 


SP SarathKumar Prakash Syncfusion Team February 23, 2022 01:20 PM UTC

Hi YR, 
  
We have confirmed that the issue “PDF pages are not rendering properly while zooming a particular PDF document in Xamarin.Forms Android platform” is a defect and logged a defect report for this issue. The patch for this issue will be delivered on March 16, 2022. 

Regards,
Sarath Kumar. 


YR YR February 23, 2022 08:14 PM UTC

Hi Sarath, that's great, thanks for the update! Regards, Yury.


SP SarathKumar Prakash Syncfusion Team February 24, 2022 04:34 AM UTC

Hi YR,

We are always happy to assist you!

Regards,
Sarath Kumar. 


YR YR March 14, 2022 09:26 PM UTC

Hi Sarath, 

I hope all is well. Just a quick check if we're still ok for release on 16th?

Regards, Yury.



SP SarathKumar Prakash Syncfusion Team March 15, 2022 05:04 AM UTC

Hi YR,

Yes. We will provide patch for the issue “PDF pages are not rendering properly while zooming a particular PDF document in Xamarin.Forms Android platform” on March 16, 2022. 
 
Regards,
Sarath Kumar. 


SP SarathKumar Prakash Syncfusion Team March 16, 2022 04:57 PM UTC

Hi YR,

We have resolved the issue “PDF pages are not rendering properly while zooming a particular PDF document in Xamarin.Forms Android platform” and the custom NuGet for the same can be downloaded from the following link.        
Disclaimer: Please note that we have created this NuGet for version 19.4.0.56 specifically to resolve the following issue reported in this forum 172950 
Note : Kindly follow the steps to clear the NuGet cache and then install patched NuGet to get the issue resolved.              
https://www.syncfusion.com/kb/6987/how-to-clear-nuget-cache            
This fix will be included in our 2022 Volume 1 main release which is expected to be available in the month of March 2022.   

Regards,
Sarath Kumar. 


YR YR March 22, 2022 03:30 PM UTC

Hi there, 

We've tried both packages and they appear to be doing same thing, as if there are no changes to behaviour.

Regards, YR.


Attachment: JumpyDrawings2203_4982d55f.zip

SP SarathKumar Prakash Syncfusion Team March 23, 2022 12:11 PM UTC

Hi YR,

We have tested the custom nuget which we provided in our previous update and it is working fine for us. 
We suspect that nuget is not installed properly in your sample. Please clear the old nuget packages before installing the nuget we provided in our previous update.
Please find the video which illustrate how to clear the nugets.
https://www.syncfusion.com/downloads/support/directtrac/general/ze/Demo_video735314519.zip

We are performing tile rendering only after the zooming completed. So it will take some time to render the page.

Regards,
Sarath Kumar. 


YR YR March 24, 2022 12:23 PM UTC

Hi Sarath,

Thanks for prompt reply! I'll retry and revert. Are there plans to release those changes into mainstream on nuget?

Regards, Yury.


SP SarathKumar Prakash Syncfusion Team March 25, 2022 11:38 AM UTC

Hi YR,

We will include the fix for the issue “PDF pages are not rendering properly while zooming a particular PDF document in Xamarin.Forms Android platform” in our next weekly NuGet release which is expected to be available on April 05,2022. 

Regards,
Sarath Kumar. 


YR YR March 29, 2022 11:36 AM UTC

Hi Sarath,

I have definitely replaced the nuget cache with latest custom viewer control and rebuilt the test app - it seems better, but still unusable.

Kind regards, Yury.


Attachment: Screen_Recording_20220329120318_ca00f3ad.rar

SP SarathKumar Prakash Syncfusion Team March 30, 2022 02:33 PM UTC

Hi YR,


We have tested the nuget in our emulator. But we were unable to reproduce the issue and it is working fine for us.

Please find the demo video from below link,

https://www.syncfusion.com/downloads/support/directtrac/general/ze/Demo_video-8225048.zip


As we said earlier, tile rendering will take some time re-render the page.

Kindly share the device specifications to analyze more on this issue and assist you with the better solution    


Regards,

Sarath Kumar.


YR YR March 30, 2022 03:36 PM UTC

Hi Sarath,

We use Huawei MediaPad M5 and Samsung Galaxy Tab 5.

We will try on various Android phones and revert.

Kind regards, Yury.



SP SarathKumar Prakash Syncfusion Team April 1, 2022 04:55 PM UTC

Hi YR,

We tried to reproduce the reported issue in multiple devices. But we could not reproduce the issue from our side.

To check further on this, we would like to set up a web meeting to analyze more on your issue and on your device environment. Please let us know your availability to have a web meeting for better clarification.

Regards,
Sarath Kumar.


YR YR April 2, 2022 08:51 AM UTC

Hi Sarath,

Thanks for your reply! Because it's a live issue with the customer, which I need to solve, am always available. But as immediate test we can do before the meeting, would you be able to produce an apk of this project with your version, that we can try on our devices please?

Kind regards, Yury.


SP SarathKumar Prakash Syncfusion Team April 4, 2022 05:06 PM UTC

Hi Yury,

We have generated apk file by attaching custom nuget which we provided in our previous update and tested. It is working fine for us. Please check the apk and let us know whether it is working from your side too.


Please find the apk file from below link,

https://www.syncfusion.com/downloads/support/directtrac/general/ze/Zoom-524047065.zip

Regards,
Sarath Kumar.


YR YR April 4, 2022 06:15 PM UTC

Hi Sarath, 

this looks much better and works as expected!

I'm sure to had cleared the cache when rebuilding.

But would really appreciate if you could give me 10 min?

In the meantime will try rebuilding sample project again.

Kind regards, Yury


SP SarathKumar Prakash Syncfusion Team April 5, 2022 11:16 AM UTC

Hi Yury,

Okay.Please clear the cache properly, rebuild the sample again and let us know whether the issue is still persisting.

Regards,
Sarath Kumar.


VD Vikram Devaraj Syncfusion Team April 12, 2022 11:33 AM UTC

Hi Yury,


We have resolved the issue “PDF pages are not rendering properly while zooming a particular PDF document in Xamarin.Forms Android platform” and now the fix can be available in our latest weekly NuGet(v20.1.0.48).

Please find our latest Weekly NuGet,
https://www.nuget.org/packages/Syncfusion.Xamarin.SfPdfViewer/20.1.0.48

Regards,
Vikram


YR YR April 28, 2022 09:25 AM UTC

Hi Vikram, customer had confirmed 20.1 appears to have resolved the issue, thank you so much. Regards, Yury.


VD Vikram Devaraj Syncfusion Team April 29, 2022 05:32 AM UTC

Hi Yury,


Thanks for the confirmation. We are proceeding to mark this forum as closed.


Regards,

Virkam



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