printing/print_dialog_gtk_interface.h

   1 // Copyright (c) 2012 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/strings/string16.h"
   9 #include "printing/printing_context_gtk.h"
  10 #include "ui/gfx/native_widget_types.h"
  11
  12 namespace printing {
  13
  14 class Metafile;
  15 class PrintSettings;
  16
  17 // An interface for GTK printing dialogs. Classes that live outside of
  18 // printing/ can implement this interface and get threading requirements
  19 // correct without exposing those requirements to printing/.
  20 class PrintDialogGtkInterface {
  21  public:
  22   // Tell the dialog to use the default print setting.
  23   virtual void UseDefaultSettings() = 0;
  24
  25   // Update the dialog to use |job_settings| and |ranges|, where |job_settings|
  26   // is a dictionary of settings with possible keys from
  27   // printing/print_job_constants.h. Only used when printing without the system
  28   // print dialog. E.g. for Print Preview. Returns false on error.
  29   virtual bool UpdateSettings(const base::DictionaryValue& job_settings,
  30                               const PageRanges& ranges,
  31                               PrintSettings* settings) = 0;
  32
  33   // Shows the dialog and handles the response with |callback|. Only used when
  34   // printing with the native print dialog.
  35   virtual void ShowDialog(
  36       gfx::NativeView parent_view,
  37       bool has_selection,
  38       const PrintingContextGtk::PrintSettingsCallback& callback) = 0;
  39
  40   // Prints the document named |document_name| contained in |metafile|.
  41   // Called from the print worker thread. Once called, the
  42   // PrintDialogGtkInterface instance should not be reused.
  43   virtual void PrintDocument(const Metafile* metafile,
  44                              const string16& document_name) = 0;
  45
  46   // Same as AddRef/Release, but with different names since
  47   // PrintDialogGtkInterface does not inherit from RefCounted.
  48   virtual void AddRefToDialog() = 0;
  49   virtual void ReleaseDialog() = 0;
  50
  51  protected:
  52   virtual ~PrintDialogGtkInterface() {}
  53 };
  54
  55 }  // namespace printing
  56
  57 #endif  // PRINTING_PRINT_DIALOG_GTK_INTERFACE_H_