Preview PDF and draw on top of it?

Targets macOS
1

I try to create an assistant program (“wizard”) to visually arrange the printable areas of a document.

Therefor I load a PDF file and display it in Quicklook (QLPreviewControlMBS). Next I would like to instantiate canvases, put it on top of the quicklook and draw something.

Unfortunately the QLPreviewControlMBS stays in frontmost position and hides the canvases.

1.) Is there a way to put it behind a canvas?
2.) What other options would I have to display a pdf and draw on top of it?

2

I guess I have to drop Quicklook and simply use DynaPDF.RenderPagePicture, like Christian is demonstrating it in his PDF Viewer Example project.

This will most likely let me do what I intend to.
It will limit me to PDF files only as background templates, but it will be crossplatform.

So maybe that is the better way to go.

3

What could be better?

You could use DynaPDF to import pages, edit them and draw directly on them, render them and discard them.

4