Loading spinner on PDF Viewer

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Posted on by gjeh

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Hi all,

I'm using a PDF Viewer in my power app to, obviously, view PDF files. However I'd like to show a custom loading spinner while the document is being loaded.

I assumed I could manipulate the spinner's visibility attribute with some conditions in the PDF Viewer's 'OnStateChange' method, but it doesn't yield me any result.

Therefore I turn to the good old forum for some advise, thanks in advance to all taking the time to consider.

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Building Power Apps

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eka24 20,923 on at

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Follow this video from Brian:
https://youtu.be/YfYf-AkY1P8?t=239

If you like this reply, please give kudos. And if this solves your problem, please accept this reply as the solution.

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gjeh 432 on at

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I'm using an http request to my power automate flow to return the selected documents from my sharepoint document library.
I've viewed Brian's video aswel as this thread. Sadly neither is working for my situation.

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eka24 20,923 on at

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Can you show what you have done so far, Screenshot or Formula

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gjeh 432 on at

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Certainly.

I've created this flow:
I call this flow through HTTP request, it strips document ID out of the http request -> gets file properties -> returns document byte string to be displayed in the PDF viewer.

looks like this on the power apps side:
How ever, during the condition in the flow the file format is being examined and if it's not a pdf it is converted to PDF and then have the bytestring of the pdf file returned. this can take a while so therefore i want to show a loading spinner between selecting a document in power apps and seeing it in the pdf viewer.

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tonyfowlkes 13 on at

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I was hoping to accomplish the same thing and watched all the related videos to spinners with no luck. I did come up with a solution that works and accomplishes the same thing, but much less technical.

Place the spinner image on the PDF Viewer where you want it to Display
Right Click on the image and select Reorder and Send to Back
Then update the Fill property on the PDF View to be transparent
This will display the spinner until the original PDF loads or if you select a new PDF to view.

Hope this helps

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Warisme 32 on at

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So here is what I did. and it works great
1. Load a spinner gif file, put it under the PDF Viewer and set a var for its Visibilty.
(I like containers, so I made one to fill the screen, set to spinner color and put image of gif inside it)
2. Set the PDF View Docuement as a Variable like varPdfDocument
3. Set the FILL of the PDF Viewer to RGBA(0,0,0,0) so its clear
4. From my Gallery the OnSelect object loads the varPdfDcoument with my Trick
(Set(varPdfDocument, Substitute(FileGallary.Selected.Thumbnail.Large,"/thumbnail","/pdf") );)
5. Set the Visibilty of the PDF Viewer to True (control with variable)
6. Now I see a spnner until the PDF LOADS.
7. the CLOSE button , has a set the DOCUMENT of hte PDF Viewer to "clear" (means nothing, but make it blank)
8. Hide the PDF Viewer (visibilty)

So the next time I click on a member of my Gallery, it loads that PDF with a spinner and never shows the previous PDF (like it did before , annoying!)

So its basically all controlled with Variables (Document, Visiblity ) and then Order for the FILL to work
PDF VIEWER on top of the spinner

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