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Ok, I've done the required changes... now show me your content!- dimitri
- Posts: 2
- Joined: February 13, 2019 - 17:29
- coolsoft
- Posts: 1972
- Joined: March 25, 2012 - 01:19
As far as I can understand you not only need to add customized parse for PDF metadata, but also show parsed data in a custom property column ("UD_Direction", "UD_Route") in Windows Explorer, right?
Well, that's a lot of work with a limited benefit, at least for PDFPropertyExtension "standard" users ;)
I agree that your users will benefit from that data being displayed in Explorer detail view, but I can't see a general needing for this feature.
I suggest you to have a look at MSDN documentation about Windows Property system.
https://docs.microsoft.com/it-it/windows/desktop/properties/windows-prop...
https://docs.microsoft.com/it-it/windows/desktop/properties/samples-reci...
It's not that hard to have a working simple custom provider using the provided samples.
This is the list of system properties, already available on clean Windows installation:
https://docs.microsoft.com/it-it/windows/desktop/properties/props
Finally, this is a good start to implement the whole provider (taken from official MS samples):
https://github.com/mnkeddy/Windows-Classic-Samples/tree/master/Samples/W...
- dimitri
- Posts: 2
- Joined: February 13, 2019 - 17:29
Thank you for the information. But this information is partial, because I also need to know how to read the meta data from the PDF files. May be you can give some hints where I can find information concerning reading meta information from the PDF files. Thank you in advance.
Dimitri
- coolsoft
- Posts: 1972
- Joined: March 25, 2012 - 01:19
Well, that should be the easiest part; there's a lot of PDF parser libraries available, with different licensing.
The worst part is that you need to be quick in file parsing, otherwise Explorer hangs and becomes somehow unresponsible.
PDFPropertyExtension has its own internal parsing library; I wrote it by myself because I needed something lightweight and blazing fast and I was not ready to make the whole sources public by using a GPL'd library.
...and I'm still not ready for it, sorry ;)
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