Print Preview: Hook up the print button to initiate printing without displaying a print dialog.

printing/printing_context_mac.mm

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "printing/printing_context_mac.h"
 
 #import <ApplicationServices/ApplicationServices.h>
 #import <AppKit/AppKit.h>
 
 #include "base/logging.h"
@@ skipping 62 matching lines @@
 }
 
 PrintingContext::Result PrintingContextMac::UseDefaultSettings() {
   DCHECK(!in_print_job_);
 
   ParsePrintInfo([NSPrintInfo sharedPrintInfo]);
 
   return OK;
 }
 
+PrintingContext::Result PrintingContextMac::UpdatePrintSettings(
+    const std::string& job_settings, const PageRanges& ranges) {
+  DCHECK(!in_print_job_);
+
+  // TODO (kmadhusu): Update other print job settings such as number of copies,
+  // collate, etc.,
+
+  // Update the print range information.
+  settings_.ranges = ranges;
+
+  return OK;
+}
+
 void PrintingContextMac::ParsePrintInfo(NSPrintInfo* print_info) {
   ResetSettings();
   print_info_ = [print_info retain];
   PageRanges page_ranges;
   NSDictionary* print_info_dict = [print_info_ dictionary];
   if (![[print_info_dict objectForKey:NSPrintAllPages] boolValue]) {
     PageRange range;
     range.from = [[print_info_dict objectForKey:NSPrintFirstPage] intValue] - 1;
     range.to = [[print_info_dict objectForKey:NSPrintLastPage] intValue] - 1;
     page_ranges.push_back(range);
@@ skipping 114 matching lines @@
     print_info_ = nil;
     context_ = NULL;
   }
 }
 
 gfx::NativeDrawingContext PrintingContextMac::context() const {
   return context_;
 }
 
 }  // namespace printing