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

printing/printing_context.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Copyright (c) 2011 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.
 
 #ifndef PRINTING_PRINTING_CONTEXT_H_
 #define PRINTING_PRINTING_CONTEXT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
@@ skipping 28 matching lines @@
   // asynchronous printing API.
   virtual void AskUserForSettings(gfx::NativeView parent_view,
                                   int max_pages,
                                   bool has_selection,
                                   PrintSettingsCallback* callback) = 0;
 
   // Selects the user's default printer and format. Updates the context with the
   // default device settings.
   virtual Result UseDefaultSettings() = 0;
 
+  // Update print settings. As of now we are updating the page range settings.
+  // In the future, update other print job settings.
+  virtual Result UpdatePrintSettings(const PageRanges& ranges) = 0;
+
   // Initializes with predefined settings.
   virtual Result InitWithSettings(const PrintSettings& settings) = 0;
 
   // Does platform specific setup of the printer before the printing. Signal the
   // printer that a document is about to be spooled.
   // Warning: This function enters a message loop. That may cause side effects
   // like IPC message processing! Some printers have side-effects on this call
   // like virtual printers that ask the user for the path of the saved document;
   // for example a PDF printer.
   virtual Result NewDocument(const string16& document_name) = 0;
@@ skipping 54 matching lines @@
 
   // The application locale.
   std::string app_locale_;
 
   DISALLOW_COPY_AND_ASSIGN(PrintingContext);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_PRINTING_CONTEXT_H_