Problem printing offscreen PDFViews
Problem printing offscreen PDFViews
- Subject: Problem printing offscreen PDFViews
- From: Waldo Lee Sharvey <email@hidden>
- Date: Wed, 13 Jan 2010 11:35:01 -0500
I have a situation where I want to print a multi-page PDF. While I
could use the PDFKit utility classes and/or quartz functions to get
the information to manually write drawing/pagination code for a NSView
subclass, I had thought that quicker alternative would be to create an
off-screen PDFView and tell it to print itself. When I tried this
solution, the print dialog didn't go away, all of the print settings
controls on the right half of the print dialog disappeared, and the
application froze.
I then wrote a tiny test application with the following method that
illustrates the problem. When the test program is compiled without the
USE_PDF_VIEW preprocessor macro defined, the blank view displays fine.
If USE_PDF_VIEW is defined, the document doesn't print, most of the
print dialog controls disappear, and the app freezes. While I have
other ways of accomplishing my goal, I'm curious as to why this
shortcut doesn't work. Is there something about Cocoa drawing I still
don't understand? Am I banging into Apple Voodoo Magic(tm) behind the
scenes that makes PDFView behave in a completely different way than
other NSViews?
- (void)printMyStuff:(id)sender {
NSPrintInfo *currInfo = [NSPrintInfo sharedPrintInfo];
#ifdef USE_PDF_VIEW
PDFView *pdfView = [[PDFView alloc] init];
PDFDocument *pdfDoc = [[PDFDocument alloc] initWithURL:[NSURL
fileURLWithPath:@"/Users/wls/Documents/my_document.pdf"]];
[pdfView setDocument: pdfDoc];
[pdfView printWithInfo:currInfo autoRotate:YES];
#else
NSView *myView = [[NSView alloc] initWithFrame:NSMakeRect(0, 0, 500, 500)];
NSPrintOperation *myop = [NSPrintOperation
printOperationWithView:myView printInfo:currInfo];
[myop runOperation];
#endif
}
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