printing/print_dialog_gtk_interface.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_
   6 #define PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_
   7
   8 #include "base/string16.h"
   9 #include "printing/printing_context_cairo.h"
  10
  11 namespace printing {
  12
  13 class Metafile;
  14
  15 // An interface for GTK printing dialogs. Classes that live outside of
  16 // printing/ can implement this interface and get threading requirements
  17 // correct without exposing those requirements to printing/.
  18 class PrintDialogGtkInterface {
  19  public:
  20   // Tell the dialog to use the default print setting.
  21   virtual void UseDefaultSettings() = 0;
  22
  23   // Update the dialog to use |settings| and |ranges|, where |settings| is a
  24   // dictionary of settings with possible keys from
  25   // printing/print_job_constants.h. Only used when printing without the system
  26   // print dialog. E.g. for Print Preview. Returns false on error.
  27   virtual bool UpdateSettings(const base::DictionaryValue& settings,
  28                               const PageRanges& ranges) = 0;
  29
  30   // Shows the dialog and handles the response with |callback|. Only used when
  31   // printing with the native print dialog.
  32   virtual void ShowDialog(
  33       PrintingContextCairo::PrintSettingsCallback* callback) = 0;
  34
  35   // Prints the document named |document_name| contained in |metafile|.
  36   // Called from the print worker thread. Once called, the
  37   // PrintDialogGtkInterface instance should not be reused.
  38   virtual void PrintDocument(const Metafile* metafile,
  39                              const string16& document_name) = 0;
  40
  41   // Same as AddRef/Release, but with different names since
  42   // PrintDialogGtkInterface does not inherit from RefCounted.
  43   virtual void AddRefToDialog() = 0;
  44   virtual void ReleaseDialog() = 0;
  45
  46  protected:
  47   virtual ~PrintDialogGtkInterface() {}
  48 };
  49
  50 }  // namespace printing
  51
  52 #endif  // PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_