Hello
I would like to place a PDFAnnotation onto a PDF page in a place where
the user clicked with the mouse.
Position for PDFAnnotations is specified using "page coordinates".
Mouse position - using global coordinates, which can be translated
into PDFView coordinates. However, I can't figure out how to translate
view coordinates into page coordinates correctly. Here's what I am
doing:
NSPoint locationInView = [self convertPoint:[theEvent
locationInWindow] fromView:[[self window] contentView]];
NSPoint locationOnPage = [self convertPoint:locationInView
fromView:self];
float scaleFactor = 1/[self scaleFactor];
locationOnPage = NSMakePoint((locationOnPage.x)*scaleFactor,
(locationOnPage.y)*scaleFactor);
This locationOnPage contains correct values (i.e., the annotation is
placed where the mouse button was clicked) only if the zooming was
100%, and view boundaries exactly matched page boundaries (as shown on
the picture: http://rghost.net/37251215/image.png).
However, if the page is zoomed in/out, and does not exactly occupy the
whole PDFView space (http://rghost.net/37251118/image.png) I do not
get right coordinates: when I click in the bottom left corner of the
PDFView, i see annotation appear in the bottom left corner of the
page, which is not even on the page..
How could I do this right?
All I need is the page origin position on the view, but there's no
such a method, as it seems..
Thank you
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